CN113865150A - Method for reducing and utilizing heat transfer temperature difference in heat absorption process - Google Patents
Method for reducing and utilizing heat transfer temperature difference in heat absorption process Download PDFInfo
- Publication number
- CN113865150A CN113865150A CN202111066147.7A CN202111066147A CN113865150A CN 113865150 A CN113865150 A CN 113865150A CN 202111066147 A CN202111066147 A CN 202111066147A CN 113865150 A CN113865150 A CN 113865150A
- Authority
- CN
- China
- Prior art keywords
- heated medium
- heat
- temperature
- heat exchange
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 277
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 104
- 230000008016 vaporization Effects 0.000 claims description 53
- 238000009834 vaporization Methods 0.000 claims description 45
- 238000010586 diagram Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 description 26
- 230000000694 effects Effects 0.000 description 6
- 230000002427 irreversible effect Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011555 saturated liquid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C3/00—Other direct-contact heat-exchange apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention provides a method for reducing and utilizing heat transfer temperature difference in a heat absorption process, and belongs to the technical field of heat power/heat pumps. A method for reducing and utilizing heat transfer temperature difference in the heat absorption process, namely when a heat source releases heat at a constant temperature and constant pressure heat absorption of a heated medium is changed into temperature change heat absorption, enabling the heated medium to flow through a heat exchange tube with a gradually-changed cross section, and reducing the pressure while absorbing the heat, wherein when the initial speed of the heated medium is subsonic and the speed of the heated medium is not higher than the sonic speed at the end of the heat exchange process, the heated medium enters the heat exchange tube with the gradually-changed cross section; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
Description
The technical field is as follows:
the invention belongs to the technical field of heat power/heat pumps.
Background art:
cold demand, heat demand and power demand are common in human life and production. The thermodynamic device converts heat energy into mechanical energy to obtain and provide power for people; a refrigerating (heat pump) apparatus converts mechanical energy into thermal energy, thereby realizing refrigeration/heating. In both thermal power plants and refrigeration (heat pump) plants, there is a heat transfer process in which a circulating working fluid takes heat from a heat source. In the thermal power device, a high-temperature heat source provides high-temperature heat load for a circulating working medium; the heat transfer temperature difference in the heat absorption process is reduced, and the average heat absorption temperature of the power cycle is increased, so that the heat power change efficiency of the heat power device is improved, and the energy utilization rate is increased. In a refrigeration (heat pump) device, a low-temperature heat source provides low-temperature heat load for a refrigeration working medium; the heat transfer temperature difference in the heat absorption process is reduced, and the average heat absorption temperature of the refrigeration cycle is increased, so that the performance index of a refrigeration (heat pump) device is increased, and the consumption of mechanical energy is reduced. Therefore, aiming at different heat absorption processes of different heat sources and working media (heated media), the invention provides a method for reducing heat transfer temperature difference in the heat absorption process, which effectively utilizes the temperature difference and takes the purpose of improving the energy utilization rate as the fundamental purpose.
The invention content is as follows:
the invention mainly aims to provide a method for reducing and utilizing heat transfer temperature difference in a heat absorption process, and the specific invention contents are explained in the following items:
1. a method for reducing and utilizing heat transfer temperature difference in the heat absorption process, namely when a heat source releases heat at a constant temperature and constant pressure heat absorption of a heated medium is changed into temperature change heat absorption, enabling the heated medium to flow through a heat exchange tube with a gradually-changed cross section, and reducing the pressure while absorbing the heat, wherein when the initial speed of the heated medium is subsonic and the speed of the heated medium is not higher than the sonic speed at the end of the heat exchange process, the heated medium enters the heat exchange tube with the gradually-changed cross section; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
2. A method for reducing and utilizing heat transfer temperature difference in a heat absorption process, namely when a heat source reduces temperature and releases heat, constant-pressure heat absorption of a heated medium is changed into variable-temperature heat absorption, and when a temperature reduction and heat release process line of the heat source is level and slower than a constant-pressure heat absorption process line of the heated medium in a temperature-entropy diagram, the heated medium flows through a heat exchange tube with a gradually changed cross section, and reduces the pressure while absorbing the heat, wherein when the initial speed of the heated medium is subsonic and the speed of the heated medium is not higher than the sonic speed at the end of the heat exchange process, the heated medium enters the heat exchange tube with the gradually changed cross section; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
3. A method for reducing and utilizing heat transfer temperature difference in a heat absorption process, namely when a heat source reduces temperature and releases heat, constant-pressure heat absorption of a heated medium is changed into variable-temperature heat absorption, and when a temperature reduction and heat release process line of the heat source is steeper than a constant-pressure heat absorption process line of the heated medium in a temperature-entropy diagram, the heated medium flows through a heat exchange tube with a gradually-changed section and is boosted while absorbing heat, wherein when the initial speed of the heated medium is subsonic, the heated medium enters the heat exchange tube with the gradually-expanded section; when the initial velocity of the heated medium is supersonic, the heated medium enters the tapered variable cross-section heat exchange tube.
4. A method for reducing and utilizing heat transfer temperature difference in the heat absorption process, namely when the temperature of a heat source is reduced and released and the temperature of a heated medium in the constant-pressure heat absorption and vaporization process is not changed, enabling the heated medium to flow through a heat exchange tube with a gradually-varied cross section, and heating and boosting the temperature while absorbing heat and vaporizing, wherein when the initial speed of the heated medium is subsonic, the heated medium enters the heat exchange tube with the gradually-enlarged variable cross section; when the initial velocity of the heated medium is supersonic, the heated medium enters the tapered variable cross-section heat exchange tube.
5. A method for reducing and utilizing heat transfer temperature difference in a heat absorption process, namely when a heat source is cooled and released, a heated medium needs to be preheated and heated first and then is subjected to heat absorption vaporization, and when the temperature of the constant-pressure heat absorption vaporization process of the heated medium is not changed, the heated medium firstly flows through a heat exchange tube with a fixed cross section to finish temperature change and heat absorption to saturation temperature, and then flows through a heat exchange tube with a gradually changed cross section to finish heat absorption vaporization and simultaneously carries out temperature rise and pressure rise, wherein when the initial speed of the heated medium is subsonic, the heated medium enters a fixed cross section-gradually enlarged cross section combined heat exchange tube; when the initial velocity of the heated medium is supersonic velocity, the heated medium enters the fixed section-tapered variable section combined heat exchange tube.
6. A method for reducing and utilizing heat transfer temperature difference in the heat absorption process, namely when the temperature of a heat source is constant-temperature and heat is released and the temperature of a heated medium is increased in the constant-pressure vaporization process, enabling the heated medium to flow through a heat exchange tube with a gradually-changed section, and reducing the pressure while the temperature is increased, absorbing heat and vaporizing, wherein when the initial speed of the heated medium is subsonic, the heated medium enters the heat exchange tube with the gradually-changed section; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
7. A method for reducing and utilizing heat transfer temperature difference in the heat absorption process, namely when the temperature of a heat source is reduced and released and the temperature of a heated medium in the constant-pressure vaporization process is increased, and the line of the temperature reduction and heat release process of the heat source is flatter than the line of the constant-pressure vaporization process of the heated medium in a temperature-entropy diagram, enabling the heated medium to flow through a heat exchange tube with a gradually-changed cross section, and reducing the pressure while the temperature is increased, absorbing heat and vaporizing, wherein when the initial speed of the heated medium is subsonic, the heated medium enters the heat exchange tube with the gradually-changed cross section; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
8. A method for reducing and utilizing heat transfer temperature difference in the heat absorption process, namely when the temperature of a heat source is reduced and released and the temperature of a heated medium in the constant-pressure vaporization process is increased, and the temperature reduction and heat release process line of the heat source is steeper than the constant-pressure vaporization process line of the heated medium in a temperature-entropy diagram, enabling the heated medium to flow through a heat exchange tube with a gradually-changed section and perform pressure rise while absorbing heat, wherein when the initial speed of the heated medium is subsonic, the heated medium enters the heat exchange tube with the gradually-expanded section; when the initial velocity of the heated medium is supersonic, the heated medium enters the tapered variable cross-section heat exchange tube.
Description of the drawings:
FIG. 1 is a schematic view of a 1 st T-s flow scheme for reducing and utilizing the endothermic process heat transfer temperature differential in accordance with the present invention.
FIG. 2 is a schematic diagram of a 2 nd T-s flow path for a method of reducing and utilizing the endothermic process heat transfer temperature differential in accordance with the present invention.
FIG. 3 is a schematic diagram of a 3 rd T-s flow scheme for reducing and utilizing the endothermic process heat transfer temperature differential in accordance with the present invention.
FIG. 4 is a schematic diagram of a 4 th T-s flow scheme for reducing and utilizing the endothermic process heat transfer temperature differential in accordance with the present invention.
FIG. 5 is a schematic diagram of a 5 th T-s flow path for a method of reducing and utilizing the endothermic process heat transfer temperature differential in accordance with the present invention.
FIG. 6 is a schematic diagram of a 6 th T-s flow path for a method of reducing and utilizing the endothermic process heat transfer temperature differential in accordance with the present invention.
FIG. 7 is a schematic diagram of a 7 th T-s flow path for a method of reducing and utilizing the endothermic process heat transfer temperature differential in accordance with the present invention.
FIG. 8 is a schematic diagram of a 8 th T-s flow scheme for reducing and utilizing the endothermic process heat transfer temperature differential in accordance with the present invention.
FIG. 9 is a schematic diagram of the flow heat exchange process of the No. 1 in accordance with the method for reducing the heat transfer temperature difference in the endothermic process provided by the present invention.
FIG. 10 is a schematic diagram of a flow heat exchange process of type 2 according to the method for reducing the heat transfer temperature difference in the endothermic process provided by the present invention.
FIG. 11 is a schematic diagram of the flow heat exchange process of type 3 according to the method for reducing the heat transfer temperature difference in the endothermic process provided by the present invention.
In the figure, AB represents a heat source heat release process line, 12 represents an endothermic process line of the heated medium, AB represents a constant pressure endothermic process line of the heated medium, and as represents a constant pressure endothermic process line of the liquid-phase heated medium; t-s diagram is temperature-entropy diagram.
The specific implementation mode is as follows:
it is to be noted that, in the description of the structure and the flow, the repetition is not necessary; obvious flow is not described. The invention is described in detail below with reference to the figures and examples.
The method of reducing and utilizing the endothermic process heat transfer temperature differential shown in FIG. 1 is such that:
(1) heat transfer conditions: the constant temperature T is maintained in the heat release process of the heat source, and the constant pressure heat absorption process of the heated medium is variable temperature heat absorption.
(2) The target requirement is as follows: the heated medium absorbs heat to T at variable or constant temperature2And the process line is gentler than the constant voltage line when the temperature changes and absorbs heat.
(3) The implementation method comprises the following steps: enabling the heated medium to flow through the heat exchange tube with the gradually-changed section, and reducing the pressure while absorbing heat; compared with ab, the process 12 of heat absorption and simultaneous pressure reduction by the heated medium is carried out1Is raised to T2The pressure after the endothermic process is ended is reduced; when the initial temperature of the heated medium is set to T2In time, the endothermic process temperature is unchanged and the pressure is reduced.
(4) The technical measures are as follows: when the initial speed of the heated medium is subsonic and the speed of the heated medium is not higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered variable-section heat exchange tube; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
(5) Temperature difference utilization: the heated medium is subjected to analysis by taking the example that the initial speed of the heated medium is subsonic speed and the speed of the heated medium is not higher than the sonic speed at the end of the heat exchange process as the example, when the heated medium absorbs heat to the temperature T according to the ab process line constant pressure2Average temperature of heat absorption processThe temperature will be lower than the average temperature of the depressurized endotherm 12; the method comprises the steps of enabling a heated medium to enter a tapered variable-cross-section heat exchange tube, absorbing heat, reducing pressure and increasing speed, partially or completely converting heat energy obtained from a heat source into kinetic energy of the heated medium, providing the kinetic energy to an expander in a power device so as to enable the expander to output more power, and providing the kinetic energy to a dual-energy compressor in a refrigeration (heat pump) device so as to reduce the input of external high-quality energy (mechanical energy or high-temperature heat energy), or improve the average temperature of the low-temperature heat absorption process of the refrigeration (heat pump) device, reduce the circulation net work of the refrigeration (heat pump) device, and reduce the input of the external high-quality energy (mechanical energy or high-temperature heat energy).
The method of reducing and utilizing the endothermic process heat transfer temperature differential shown in FIG. 2 is such that:
(1) heat transfer conditions: the temperature is reduced in the heat release process of the heat source, and the temperature is increased from TACooling to TB(ii) a The constant-pressure heat absorption process of the heated medium is variable-temperature heat absorption, and a temperature reduction and heat release process line of a heat source in a temperature-entropy diagram is smoother than a constant-pressure heat absorption process line of the heated medium.
(2) The target requirement is as follows: the heated medium is composed of T1Changing temperature and absorbing heat to T2So that the heat absorption process line is smoother than the constant pressure heat absorption process line.
(3) The implementation method comprises the following steps: enabling the heated medium to flow through the heat exchange tube with the gradually-changed section, and reducing the pressure while absorbing heat; process 12 in which the heated medium absorbs heat and is simultaneously raised in pressure, temperature T, in comparison with constant-pressure heat-absorbing process ab1Is raised to T2The pressure after the endothermic process is ended is reduced.
(4) The technical measures are as follows: when the initial speed of the heated medium is subsonic and the speed of the heated medium is not higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered variable-section heat exchange tube; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
(5) Temperature difference utilization: taking the example that the initial speed of the heated medium is subsonic, and the speed of the heated medium is not higher than the sonic speed at the end of the heat exchange process as the example, when the heated medium absorbs heat to the temperature T according to the ab process line constant pressure2When the average temperature of the endothermic process is lower than the average temperature of the depressurization endothermic process 12; the method comprises the steps of enabling a heated medium to enter a tapered variable-cross-section heat exchange tube, absorbing heat, reducing pressure and increasing speed, partially or completely converting heat energy obtained from a heat source into kinetic energy of the heated medium, providing the kinetic energy to an expander in a power device so as to enable the expander to output more power, and providing the kinetic energy to a dual-energy compressor in a refrigeration (heat pump) device so as to reduce the input of external high-quality energy (mechanical energy or high-temperature heat energy), or improve the average temperature of the low-temperature heat absorption process of the refrigeration (heat pump) device, reduce the circulation net work of the refrigeration (heat pump) device, and reduce the input of the external high-quality energy (mechanical energy or high-temperature heat energy).
The method of reducing and utilizing the endothermic process heat transfer temperature differential shown in FIG. 3 is such that:
(1) heat transfer conditions: the temperature is reduced in the heat release process of the heat source, and the temperature is increased from TACooling to TB(ii) a The constant-pressure heat absorption process of the heated medium is variable-temperature heat absorption, and a temperature reduction and heat release process line of a heat source in a temperature-entropy diagram is steeper than a constant-pressure heat absorption process line of the heated medium.
(2) The target requirement is as follows: the heated medium is composed of T1Changing temperature and absorbing heat to T2So that the heat absorption process line is steeper than the constant pressure heat absorption process line.
(3) The implementation method comprises the following steps: enabling the heated medium to flow through the heat exchange tube with the gradually-changed section, and boosting the pressure while absorbing heat; process 12 in which the heated medium absorbs heat and is simultaneously raised in pressure, temperature T, in comparison with constant-pressure heat-absorbing process ab1Is raised to T2The pressure after the endothermic process is ended is increased.
(4) The technical measures are as follows: when the initial speed of the heated medium is subsonic, the heated medium enters the gradually-expanding type variable cross-section heat exchange tube; when the initial velocity of the heated medium is supersonic, the heated medium enters the tapered variable cross-section heat exchange tube.
(5) Temperature difference utilization: by the heated mediumThe initial speed is subsonic, and the speed of the heated medium is not higher than the sonic speed at the end of the heat exchange process, namely when the heated medium absorbs heat to the temperature T according to the ab process line constant pressure2When the average temperature of the endothermic process is lower than the average temperature of the pressure-increasing endothermic process 12; the method comprises the steps of enabling a heated medium to enter a gradually-enlarged variable cross-section heat exchange tube, absorbing heat and pressurizing, converting part of heat energy obtained from a heat source into pressure of the heated medium, reducing low-temperature heat release load in a power device so as to improve heat efficiency, increasing population pressure of a compressor in a refrigeration (heat pump) device so as to reduce the input of external high-quality energy (mechanical energy or high-temperature heat energy), or increasing the average temperature of the low-temperature heat absorption process of the refrigeration (heat pump) device, and reducing the circulation net work of the refrigeration (heat pump) device, so that the input of the external high-quality energy (mechanical energy or high-temperature heat energy) is reduced.
The method of reducing and utilizing the endothermic process heat transfer temperature differential shown in FIG. 4 is such that:
(1) heat transfer conditions: the temperature is reduced in the heat release process of the heat source, and the temperature is increased from TACooling to TB(ii) a The temperature of the heated medium in the constant-pressure heat absorption vaporization process is not changed.
(2) The target requirement is as follows: the heated medium is boosted, absorbed and vaporized by T1Changing temperature and absorbing heat to T2。
(3) The implementation method comprises the following steps: the heated medium flows through the heat exchange tube with the gradually-changed section, and the temperature and the pressure are raised while the heat is absorbed and vaporized; compared with the constant-pressure heat absorption process ab, the process 12 of absorbing heat and raising the temperature and the pressure by the heated medium is carried out, wherein the temperature is T1Is raised to T2The pressure after the endothermic process is ended is increased.
(4) The technical measures are as follows: when the initial speed of the heated medium is subsonic, the heated medium enters the gradually-expanding type variable cross-section heat exchange tube; when the initial velocity of the heated medium is supersonic, the heated medium enters the tapered variable cross-section heat exchange tube.
(5) Temperature difference utilization: the heated medium is analyzed by taking the initial speed of the heated medium as the subsonic speed, when the heated medium absorbs heat according to the ab process line constant pressure, the temperature is not changed, and the average temperature in the heat absorption process is lower than that in the pressure boosting heat absorption process 12; the method comprises the steps of enabling a heated medium to enter a gradually-enlarged variable cross-section heat exchange tube, absorbing heat and pressurizing, converting part of heat energy obtained from a heat source into pressure of the heated medium, reducing low-temperature heat release load in a power device so as to improve heat efficiency, increasing population pressure of a compressor in a refrigeration (heat pump) device so as to reduce the input of external high-quality energy (mechanical energy or high-temperature heat energy), or increasing the average temperature of the low-temperature heat absorption process of the refrigeration (heat pump) device, and reducing the circulation net work of the refrigeration (heat pump) device, so that the input of the external high-quality energy (mechanical energy or high-temperature heat energy) is reduced.
The method of reducing and utilizing the endothermic process heat transfer temperature differential shown in FIG. 5 is such that:
(1) heat transfer conditions: the temperature is reduced in the heat release process of the heat source, and the temperature is increased from TACooling to TB(ii) a The heated medium needs to be preheated and heated and then subjected to heat absorption vaporization, and the temperature of the constant-pressure heat absorption vaporization process of the heated medium is unchanged.
(2) The target requirement is as follows: preheating the fluid to a saturation temperature TsThen; the heated medium is boosted, absorbed and vaporized by TsChanging temperature and absorbing heat to T2。
(3) The implementation method comprises the following steps: the heated medium firstly flows through the heat exchange tube with the fixed cross section to finish temperature change and heat absorption to saturation temperature, and then flows through the heat exchange tube with the gradually changed cross section to finish heat absorption and vaporization and simultaneously carries out temperature rise and pressure rise; the preheating stage is the same as the constant-pressure endothermic process asb, except that the process s2 of endothermic vaporization and simultaneous pressure increase of the heated medium-temperature from TsIs raised to T2The pressure after the endothermic process is ended is increased.
(4) The technical measures are as follows: when the initial speed of the heated medium is subsonic, the heated medium enters the fixed-section gradually-expanding type variable-section combined heat exchange tube; when the initial velocity of the heated medium is supersonic velocity, the heated medium enters the fixed section-tapered variable section combined heat exchange tube.
(5) Temperature difference utilization: taking the initial speed of the heated medium as subsonic speed as an example, when the heated medium is vaporized after endothermic temperature rise according to asb process line constant pressure, the average temperature of the endothermic process is lower than that of the pressure-rising endothermic process 1s 2; the method comprises the steps that a heated medium enters a fixed-section and gradually-expanding variable-section combined heat exchange tube, a fixed-section heat exchange section finishes preheating for 1s and is heated to saturation temperature, then the fixed-section heat exchange section enters a gradually-expanding variable-section heat exchange section to absorb heat and pressurize, part of heat energy obtained from a heat source is converted into pressure of the heated medium, low-temperature heat release load is reduced in a power device, so that heat efficiency is improved, the population pressure of a compressor is increased in a refrigeration (heat pump) device, so that the input of external high-quality energy (mechanical energy or high-temperature heat energy) is reduced, or the average temperature of a low-temperature heat absorption process of the refrigeration (heat pump) device is increased, and the circulation net work of the refrigeration (heat pump) device is reduced, so that the input of the external high-quality energy (mechanical energy or high-temperature heat energy) is reduced.
The method of reducing and utilizing the endothermic process heat transfer temperature differential shown in FIG. 6 is such that:
(1) heat transfer conditions: the constant temperature T is maintained in the heat releasing process of the heat source, and the temperature of the heated medium is increased in the constant-pressure vaporization process.
(2) The target requirement is as follows: the heated medium absorbs heat to vaporize to T at variable or constant temperature2And the process line of the heat absorption vaporization is a straight line section or is smoother than the constant pressure line ab.
(3) The implementation method comprises the following steps: the heated medium flows through the heat exchange tube with the gradually changed section, and the pressure is reduced while the temperature is raised, the heat is absorbed and the medium is vaporized; compared with ab in constant-pressure endothermic vaporization process, 12 in which the heated medium is subjected to endothermic vaporization and simultaneously is heated and depressurized, wherein the temperature is T1Is raised to T2The pressure after the endothermic process is ended is reduced.
(4) The technical measures are as follows: when the initial speed of the heated medium is subsonic, the heated medium enters the tapered variable-section heat exchange tube; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
(5) Temperature difference utilization: the initial velocity of the heated medium is subsonic, and the velocity of the heated medium is not higher than the sonic velocity at the end of the heat exchange processWhen the heated medium is subjected to heat absorption and vaporization to the temperature T according to the ab process line constant pressure2When the average temperature of the endothermic process is lower than the average temperature of the depressurized endothermic vaporization process 12; the medium to be heated flows through the tapered variable-cross-section heat exchange tube, the heat absorption and pressure reduction and the speed increase are realized, part or all of the heat energy obtained from the heat source is converted into the kinetic energy of the medium to be heated, the low-temperature heat release load is reduced in the power device, so that the heat efficiency is improved, the average temperature in the low-temperature heat absorption process of the refrigeration (heat pump) device is increased, and the cycle net work is reduced, so that the input of external high-quality energy (mechanical energy or high-temperature heat energy) is reduced.
The method of reducing and utilizing the endothermic process heat transfer temperature differential shown in FIG. 7 is such that:
(1) heat transfer conditions: the temperature is reduced in the heat release process of the heat source, and the temperature is increased from TACooling to TB(ii) a The temperature of the heated medium in the constant-pressure vaporization process is increased, and the temperature reduction and heat release process line of the heat source in the temperature-entropy diagram is smoother than that of the heated medium in the constant-pressure vaporization process line.
(2) The target requirement is as follows: the heated medium is composed of T1Changing temperature, absorbing heat and vaporizing to T2So that the heat absorption vaporization process line is smoother than the constant pressure heat absorption vaporization process line.
(3) The implementation method comprises the following steps: the heated medium flows through the heat exchange tube with the gradually changed section, and the pressure is reduced while the temperature is raised, the heat is absorbed and the medium is vaporized; compared with ab in constant-pressure endothermic vaporization process, 12 in which the heated medium is subjected to endothermic vaporization and reduced in pressure at the same time-temperature is T1Is raised to T2The pressure after the endothermic process is ended is reduced.
(4) The technical measures are as follows: when the initial speed of the heated medium is subsonic, the heated medium enters the tapered variable-section heat exchange tube; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
(5) Temperature difference utilization: the initial speed of the heated medium is subsonic, and the heat exchange process is carried outWhen the speed of the heated medium is not higher than the sound speed at the end, the heated medium is analyzed by taking the example that the heated medium absorbs heat and vaporizes to the temperature T according to the ab process line constant pressure2When the average temperature of the endothermic vaporization is lower than the average temperature of the depressurized endothermic vaporization 12; the medium to be heated enters the tapered variable-cross-section heat exchange tube to absorb heat, reduce pressure and increase speed, part or all of the heat energy obtained from the heat source is converted into the kinetic energy of the medium to be heated, the low-temperature heat release load is reduced in the power device so as to improve the heat efficiency, and the average temperature in the low-temperature heat absorption process of the refrigeration (heat pump) device is increased, and the cycle net work is reduced so as to reduce the input of external high-quality energy (mechanical energy or high-temperature heat energy).
The method of reducing and utilizing the endothermic process heat transfer temperature differential shown in FIG. 8 is such that:
(1) heat transfer conditions: the temperature is reduced in the heat release process of the heat source, and the temperature is increased from TACooling to TB(ii) a The temperature of the heated medium in the constant-pressure vaporization process is increased, and the temperature reduction and heat release process line of the heat source in the temperature-entropy diagram is steeper than that of the heated medium in the constant-pressure vaporization process line.
(2) The target requirement is as follows: the heated medium is composed of T1Changing temperature, absorbing heat and vaporizing to T2So that the heat absorption vaporization process line is steeper than the constant pressure heat absorption vaporization process line.
(3) The implementation method comprises the following steps: enabling the heated medium to flow through the heat exchange tube with the gradually-changed section, and boosting the pressure while absorbing heat; compared with ab, 12-temperature T1Is raised to T2The pressure after the endothermic process is ended is increased.
(4) The technical measures are as follows: when the initial speed of the heated medium is subsonic, the heated medium enters the gradually-expanding type variable cross-section heat exchange tube; when the initial velocity of the heated medium is supersonic, the heated medium enters the tapered variable cross-section heat exchange tube.
(5) Temperature difference utilization: the heated medium is analyzed by taking the initial speed of the heated medium as subsonic speed as an example, when the heated medium is subjected to endothermic vaporization to the temperature T according to the ab process line constant pressure2When the average temperature of the endothermic process is lower than the average temperature of the pressure-increasing endothermic vaporization process 12; make itThe heated medium enters the gradually-expanded variable cross-section heat exchange tube, absorbs heat and increases pressure, and partial heat energy obtained from the heat source is converted into pressure rise of the heated medium; the low-temperature heat release load is reduced in the power device so as to improve the heat efficiency, the population pressure of a compressor is increased in the refrigeration (heat pump) device so as to reduce the input of external high-quality energy (mechanical energy or high-temperature heat energy), or the average temperature of the low-temperature heat absorption process is increased, and the circulation net work of the refrigeration (heat pump) device is reduced so as to reduce the input of the external high-quality energy (mechanical energy or high-temperature heat energy).
The flow heat exchange process shown in fig. 9, which is given in terms of a method of reducing the difference in heat transfer temperature in the endothermic process, is performed as follows:
aiming at maintaining a constant temperature T in the heat releasing process of a heat source, and changing the constant pressure heat absorbing process of a heated medium into variable temperature heat absorption, according to the method for reducing and utilizing the heat transfer temperature difference in the heat absorbing process shown in figure 1, the tapered variable cross-section heat exchange tube shown in figure 9 is selected, so that the heated medium at subsonic velocity enters the tapered variable cross-section heat exchange tube, and the heat load Q from the constant temperature heat source is absorbed, and the following thermodynamic effects are brought: temperature is from T1Heat up and absorb to T2Pressure is given by p1Reducing the pressure to p2Velocity of cf1Increase to cf2。
The flow heat exchange process shown in fig. 10, which is given in terms of a method of reducing the difference in heat transfer temperature in the endothermic process, is performed as follows:
temperature T in heat release process of heat sourceACooling to TBAccording to the method for reducing and utilizing the heat transfer temperature difference in the heat absorption process shown in fig. 4, the gradually-expanding type variable cross-section heat exchange tube shown in fig. 10 is selected, so that the heated medium (saturated liquid) at the subsonic velocity enters the gradually-expanding type variable cross-section heat exchange tube, and the heat load Q from the variable temperature heat source is absorbed, and the following thermodynamic effects are brought: temperature is from T1Heat up and absorb to T2Pressure is given by p1Is boosted to p2Velocity of cf1Is reduced to cf2(or c)f2Lower than the exit velocity after flowing through a cross-sectioned heat exchange tube).
The flow heat exchange process shown in fig. 11, which is given in terms of a method of reducing the difference in heat transfer temperature in the endothermic process, is performed as follows:
the temperature is reduced in the heat release process of the heat source, and the temperature is increased from TACooling to TB(ii) a The heated medium needs to be preheated and heated first and then undergoes heat absorption vaporization, the temperature of the heated medium in the constant-pressure heat absorption vaporization process is not changed, according to the method for reducing and utilizing the heat transfer temperature difference in the heat absorption process shown in fig. 5, the constant-section and gradually-expanding type variable-section composite heat exchange tube shown in fig. 11 is selected, the heated medium (unsaturated liquid) at the subsonic speed enters the constant-section and gradually-expanding type variable-section composite heat exchange tube, and the heat load Q from the variable-temperature heat source is absorbed, so that the following thermodynamic effects are brought: in the heat exchange tube part with constant cross section, the temperature is from T1Heat up and absorb to Ts(ii) a In the gradually-expanded variable cross-section heat exchange tube portion, the temperature is changed from TsIs raised to T2Pressure is given by p1Is boosted to p2Velocity of cf1Is reduced to cf2(or c)f2Lower than the exit velocity after flowing through a cross-sectioned heat exchange tube).
The effect that the technology of the invention can realize, the method for reducing and utilizing the heat transfer temperature difference in the heat absorption process, which is provided by the invention, has the following effects and advantages:
(1) an effective method is provided for reducing the irreversible loss of the temperature difference between a high-temperature heat source and a working medium in the thermodynamic device.
(2) The method provides an effective method for reducing the irreversible loss of the temperature difference between the working medium of the refrigeration (heat pump) device and the low-temperature heat source.
(3) Aiming at heat supply of a constant-temperature heat source, a method for continuously performing constant-temperature heat absorption on a heated medium (working medium) under small temperature difference is provided, so that irreversible loss caused by the temperature difference is reduced to the maximum extent.
(4) Aiming at heat supply of a constant-temperature heat source, a method for continuously changing temperature and absorbing heat of a heated medium (working medium) under small temperature difference is provided, so that the irreversible loss of the temperature difference is reduced to the maximum extent.
(5) Aiming at the heat supply of a temperature-changing heat source, a method for continuously changing temperature and absorbing heat of a heated medium (working medium) under small temperature difference is provided, so that the irreversible loss of the temperature difference is reduced to the maximum extent.
(6) The specific method for reducing the heat transfer temperature difference in the heat absorption process under various technical conditions can effectively cope with various working conditions such as a constant temperature heat source, a variable temperature heat source, simple substance phase change heat absorption, mixture phase change heat absorption, gas temperature change heat absorption, liquid temperature change heat absorption and the like, and is favorable for improving the utilization level and the utilization effect of heat energy and mechanical energy.
Claims (8)
1. A method for reducing and utilizing heat transfer temperature difference in the heat absorption process, namely when a heat source releases heat at a constant temperature and constant pressure heat absorption of a heated medium is changed into temperature change heat absorption, enabling the heated medium to flow through a heat exchange tube with a gradually-changed cross section, and reducing the pressure while absorbing the heat, wherein when the initial speed of the heated medium is subsonic and the speed of the heated medium is not higher than the sonic speed at the end of the heat exchange process, the heated medium enters the heat exchange tube with the gradually-changed cross section; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
2. A method for reducing and utilizing heat transfer temperature difference in a heat absorption process, namely when a heat source reduces temperature and releases heat, constant-pressure heat absorption of a heated medium is changed into variable-temperature heat absorption, and when a temperature reduction and heat release process line of the heat source is level and slower than a constant-pressure heat absorption process line of the heated medium in a temperature-entropy diagram, the heated medium flows through a heat exchange tube with a gradually changed cross section, and reduces the pressure while absorbing the heat, wherein when the initial speed of the heated medium is subsonic and the speed of the heated medium is not higher than the sonic speed at the end of the heat exchange process, the heated medium enters the heat exchange tube with the gradually changed cross section; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
3. A method for reducing and utilizing heat transfer temperature difference in a heat absorption process, namely when a heat source reduces temperature and releases heat, constant-pressure heat absorption of a heated medium is changed into variable-temperature heat absorption, and when a temperature reduction and heat release process line of the heat source is steeper than a constant-pressure heat absorption process line of the heated medium in a temperature-entropy diagram, the heated medium flows through a heat exchange tube with a gradually-changed section and is boosted while absorbing heat, wherein when the initial speed of the heated medium is subsonic, the heated medium enters the heat exchange tube with the gradually-expanded section; when the initial velocity of the heated medium is supersonic, the heated medium enters the tapered variable cross-section heat exchange tube.
4. A method for reducing and utilizing heat transfer temperature difference in the heat absorption process, namely when the temperature of a heat source is reduced and released and the temperature of a heated medium in the constant-pressure heat absorption and vaporization process is not changed, enabling the heated medium to flow through a heat exchange tube with a gradually-varied cross section, and heating and boosting the temperature while absorbing heat and vaporizing, wherein when the initial speed of the heated medium is subsonic, the heated medium enters the heat exchange tube with the gradually-enlarged variable cross section; when the initial velocity of the heated medium is supersonic, the heated medium enters the tapered variable cross-section heat exchange tube.
5. A method for reducing and utilizing heat transfer temperature difference in a heat absorption process, namely when a heat source is cooled and released, a heated medium needs to be preheated and heated first and then is subjected to heat absorption vaporization, and when the temperature of the constant-pressure heat absorption vaporization process of the heated medium is not changed, the heated medium firstly flows through a heat exchange tube with a fixed cross section to finish temperature change and heat absorption to saturation temperature, and then flows through a heat exchange tube with a gradually changed cross section to finish heat absorption vaporization and simultaneously carries out temperature rise and pressure rise, wherein when the initial speed of the heated medium is subsonic, the heated medium enters a fixed cross section-gradually enlarged cross section combined heat exchange tube; when the initial velocity of the heated medium is supersonic velocity, the heated medium enters the fixed section-tapered variable section combined heat exchange tube.
6. A method for reducing and utilizing heat transfer temperature difference in the heat absorption process, namely when the temperature of a heat source is constant-temperature and heat is released and the temperature of a heated medium is increased in the constant-pressure vaporization process, enabling the heated medium to flow through a heat exchange tube with a gradually-changed section, and reducing the pressure while the temperature is increased, absorbing heat and vaporizing, wherein when the initial speed of the heated medium is subsonic, the heated medium enters the heat exchange tube with the gradually-changed section; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
7. A method for reducing and utilizing heat transfer temperature difference in the heat absorption process, namely when the temperature of a heat source is reduced and released and the temperature of a heated medium in the constant-pressure vaporization process is increased, and the line of the temperature reduction and heat release process of the heat source is flatter than the line of the constant-pressure vaporization process of the heated medium in a temperature-entropy diagram, enabling the heated medium to flow through a heat exchange tube with a gradually-changed cross section, and reducing the pressure while the temperature is increased, absorbing heat and vaporizing, wherein when the initial speed of the heated medium is subsonic, the heated medium enters the heat exchange tube with the gradually-changed cross section; when the initial speed of the heated medium is supersonic speed and the speed of the heated medium is higher than the initial speed after the heat exchange process is finished, the heated medium enters the gradually-expanded variable-section heat exchange tube; when the initial speed of the heated medium is subsonic and the speed of the heated medium is higher than the sonic speed at the end of the heat exchange process, the heated medium enters the tapered-gradually-expanded variable-section heat exchange tube.
8. A method for reducing and utilizing heat transfer temperature difference in the heat absorption process, namely when the temperature of a heat source is reduced and released and the temperature of a heated medium in the constant-pressure vaporization process is increased, and the temperature reduction and heat release process line of the heat source is steeper than the constant-pressure vaporization process line of the heated medium in a temperature-entropy diagram, enabling the heated medium to flow through a heat exchange tube with a gradually-changed section and perform pressure rise while absorbing heat, wherein when the initial speed of the heated medium is subsonic, the heated medium enters the heat exchange tube with the gradually-expanded section; when the initial velocity of the heated medium is supersonic, the heated medium enters the tapered variable cross-section heat exchange tube.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020109458538 | 2020-09-02 | ||
| CN202010945853 | 2020-09-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113865150A true CN113865150A (en) | 2021-12-31 |
Family
ID=78995354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111066147.7A Pending CN113865150A (en) | 2020-09-02 | 2021-08-31 | Method for reducing and utilizing heat transfer temperature difference in heat absorption process |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113865150A (en) |
| WO (1) | WO2022048094A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01105000A (en) * | 1987-10-15 | 1989-04-21 | Hitachi Ltd | Vacuum ejector device |
| JP2000009371A (en) * | 1998-04-20 | 2000-01-14 | Sanken Setsubi Kogyo Co Ltd | Continuous ice making vapor exhaust type heat accumulator |
| JP2007107839A (en) * | 2005-10-14 | 2007-04-26 | Tlv Co Ltd | Steam attemperator |
| US20080202121A1 (en) * | 2005-03-11 | 2008-08-28 | Edmund Nagel | Internal Combustion Engine with an Injector as a Compaction Level |
| CN202109700U (en) * | 2011-04-08 | 2012-01-11 | 魏仕英 | Heat pump for jetting enthalpy gain phase-change supercharged steam |
| CN106196725A (en) * | 2016-09-13 | 2016-12-07 | 魏仕英 | Supersonic speed phase transformation increases enthalpy spraying pressurized water steam heat pump |
| CN111456973A (en) * | 2020-04-23 | 2020-07-28 | 自然资源部天津海水淡化与综合利用研究所 | Steam jet pump with nozzle heating function |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2413378A1 (en) * | 1974-03-20 | 1975-10-02 | Siegfried Dipl Phys Justus | Gas turbine for motor vehicles - has laval nozzle and a pressure reducing turbine but no heat exchanger |
| IT1094162B (en) * | 1978-02-22 | 1985-07-26 | Montedison Spa | CONTINUOUS PROCESS FOR THE RECOVERY OF POLYCARBONATE FROM ITS SOLUTIONS |
| CA2287149A1 (en) * | 1998-10-21 | 2000-04-21 | Praxair Technology, Inc. | Process for intensifying fast plug flow reactions using a high intensity tubular reactor |
| JP2006503227A (en) * | 2002-10-11 | 2006-01-26 | パースーツ ダイナミクス ピーエルシー | Jet pump |
| CN2811909Y (en) * | 2005-06-10 | 2006-08-30 | 洛阳蓝海实业有限公司 | Single shock wave sound velocity changing and pressurizing heat exchanger |
| CN102466272A (en) * | 2010-11-15 | 2012-05-23 | 北京上元恒通环保科技有限公司 | Novel water-saving system of energy-saving heat exchanger |
| CN103148649B (en) * | 2013-03-27 | 2015-03-04 | 上海理工大学 | Ejector design method for vapor compression refrigeration circulating system |
| CN105366029B (en) * | 2015-12-14 | 2017-08-04 | 北京航空航天大学 | Hypersonic aircraft active cooling structure and biphase gas and liquid flow centrifugal spiral strengthened heat exchange method |
-
2021
- 2021-08-30 WO PCT/CN2021/000176 patent/WO2022048094A1/en active Application Filing
- 2021-08-31 CN CN202111066147.7A patent/CN113865150A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01105000A (en) * | 1987-10-15 | 1989-04-21 | Hitachi Ltd | Vacuum ejector device |
| JP2000009371A (en) * | 1998-04-20 | 2000-01-14 | Sanken Setsubi Kogyo Co Ltd | Continuous ice making vapor exhaust type heat accumulator |
| US20080202121A1 (en) * | 2005-03-11 | 2008-08-28 | Edmund Nagel | Internal Combustion Engine with an Injector as a Compaction Level |
| JP2007107839A (en) * | 2005-10-14 | 2007-04-26 | Tlv Co Ltd | Steam attemperator |
| CN202109700U (en) * | 2011-04-08 | 2012-01-11 | 魏仕英 | Heat pump for jetting enthalpy gain phase-change supercharged steam |
| CN106196725A (en) * | 2016-09-13 | 2016-12-07 | 魏仕英 | Supersonic speed phase transformation increases enthalpy spraying pressurized water steam heat pump |
| CN111456973A (en) * | 2020-04-23 | 2020-07-28 | 自然资源部天津海水淡化与综合利用研究所 | Steam jet pump with nozzle heating function |
Non-Patent Citations (1)
| Title |
|---|
| 徐建良: "工程热力学", 31 January 2002, 化学工业出版社, pages: 102 - 103 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022048094A1 (en) | 2022-03-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108716783A (en) | A kind of back pressure injecting type Trans-critical cycle CO2Power cycle generating system | |
| CN110700907A (en) | Single working medium combined cycle steam power device | |
| CN113865150A (en) | Method for reducing and utilizing heat transfer temperature difference in heat absorption process | |
| WO2020224283A1 (en) | Combined cycle power device | |
| CN113865151A (en) | Method for reducing and utilizing heat transfer temperature difference in heat release process | |
| CN107906782B (en) | Double-absorption type power-cooling combined supply circulation system and method thereof | |
| CN110953028A (en) | Combined cycle power plant | |
| WO2021042649A1 (en) | Single working medium steam combined cycle | |
| WO2022062270A1 (en) | Recuperative thermodynamic cycle and recuperative gas thermal power apparatus | |
| CN115218515A (en) | Second-class thermally-driven compression heat pump | |
| CN113417756A (en) | Internal combustion engine type combined cycle heat and power combined supply device | |
| CN117759364A (en) | Hydrogen fuel carrying same nuclear energy combined cycle steam power device | |
| CN112944715A (en) | Absorption heat pump | |
| CN117780463A (en) | Hydrogen fuel carrying same light and heat combined cycle steam power device | |
| CN117759369A (en) | Hydrogen fuel carrying same light and heat combined cycle steam power device | |
| CN115218541A (en) | Thermally driven compression-absorption heat pump | |
| CN117823245A (en) | Hydrogen fuel carrying and combined cycle steam power device | |
| CN117780472A (en) | Hydrogen fuel carrying same nuclear energy combined cycle power plant | |
| CN117759359A (en) | Hydrogen fuel carrying same heat energy combined cycle steam power device | |
| CN112944724A (en) | Compression-absorption heat pump | |
| CN113108496A (en) | Third-class thermally-driven compression heat pump | |
| CN115406128A (en) | Third-class thermally-driven compression heat pump | |
| CN117759503A (en) | Photo-thermal carrying single-working-medium combined cycle steam power device | |
| CN115218528A (en) | Third-class absorption heat pump and fourth-class absorption heat pump | |
| CN113932471A (en) | Phase change type mechanical compression heat pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |