CN106322813B - Energy-saving combined type heat pump system - Google Patents
Energy-saving combined type heat pump system Download PDFInfo
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- CN106322813B CN106322813B CN201611033824.4A CN201611033824A CN106322813B CN 106322813 B CN106322813 B CN 106322813B CN 201611033824 A CN201611033824 A CN 201611033824A CN 106322813 B CN106322813 B CN 106322813B
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- stop valve
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- heat exchanger
- heat source
- heat
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- 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- 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
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- 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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses an energy-saving composite heat pump system, which belongs to the technical field of energy-saving and environment-friendly refrigeration/heating, and comprises a refrigeration/heating loop, a cooling tower, a heat source tower and a solar heat collector branch, wherein the refrigeration/heating loop is formed by sequentially connecting a compressor, a four-way reversing valve, a use side heat exchanger, a throttling mechanism with a bidirectional throttling function and a cooling side/heat source side heat exchanger in sequence; the use side heat exchanger is connected with external terminal equipment; the cooling side/heat source side heat exchanger is formed by connecting a finned heat exchanger and a shell-and-tube heat exchanger in parallel, and two ends of the finned heat exchanger and the shell-and-tube heat exchanger are respectively connected with 1 stop valve; all the branches are connected in parallel and then are connected with the shell-and-tube heat exchanger; the heat pump system can realize the switching of different cold sources or heat sources by starting and stopping the corresponding stop valves according to the requirements, so that the unit can always run efficiently, and meanwhile, the cost is saved.
Description
Technical Field
The invention belongs to the technical field of energy-saving and environment-friendly refrigeration/heating, and particularly relates to an energy-saving combined type heat pump system.
Background
The current ecological environment problem taking energy as the center is increasingly prominent, and the problems in the aspects of developing and utilizing new energy, exploring new energy-saving optimization ways and the like are also concerned. The heat pump industry becomes a research hotspot in related fields at home and abroad due to the wide application market.
The existing water source heat pump unit and air source heat pump unit in the market only adopt a single cold source/heat source, can not be matched with changed environmental conditions by adjusting the form of the cold source/heat source, and have poor adaptability in practical application.
The traditional heat pump technology cannot meet new requirements of energy conservation and environmental protection.
Disclosure of Invention
The invention aims to provide an energy-saving compound heat pump system aiming at the technical defects in the prior art. The system can improve the efficiency of the unit while saving cost, and can utilize various renewable energy sources such as solar energy, wind energy, geothermal energy and the like.
The technical scheme adopted for realizing the purpose of the invention is as follows:
an energy-saving composite heat pump system is characterized by comprising a refrigerating/heating loop, a cooling tower branch and a heat source branch, wherein the refrigerating/heating loop is formed by sequentially connecting a compressor (1), a four-way reversing valve (2), a use side heat exchanger (3), a throttling mechanism (4) with a bidirectional throttling function and a cooling side/heat source side heat exchanger in sequence; the use side heat exchanger (3) is connected with external end equipment; the cooling side/heat source side heat exchanger is formed by connecting a finned heat exchanger (5) and a shell and tube heat exchanger (7) in parallel, two ends of the finned heat exchanger (5) are respectively connected with a first stop valve (6) and a second stop valve (27), and two ends of the shell and tube heat exchanger (7) are respectively connected with a third stop valve (8) and a fourth stop valve (26); the cooling tower branch and the heat source branch are connected in parallel and then are connected with a shell-and-tube heat exchanger (7);
the heat source branch is formed by connecting a heat source tower branch and a solar heat collector branch in parallel; the heat source tower branch comprises a heat source tower (15), a fifth stop valve (14) and a sixth stop valve (19) which are respectively connected to the two ends of the heat source tower, the solar heat collector branch comprises a solar heat collector (17), a seventh stop valve (16) and an eighth stop valve (18) which are respectively connected to the two ends of the solar heat collector, and one end of the heat source branch is connected with one end of the cooling tower branch in parallel through a first circulating water pump (24);
the cooling tower branch is formed by sequentially connecting a ninth stop valve (25), a cooling tower (11), a tenth stop valve (9) and a second circulating water pump (10); the ninth stop valve (25) is connected with one end of the heat source branch circuit, which is provided with the first circulating water pump (24), in parallel, and the tenth stop valve (9) is connected with the other end of the heat source branch circuit in parallel with the second circulating water pump (10).
The combined heat pump system also comprises a geothermal energy branch which is connected with the cooling tower branch and the heat source branch in parallel, wherein the geothermal energy branch is formed by sequentially connecting an eleventh stop valve (13), a pumping well/recharging well (20), a recharging well/pumping well (21) and a twelfth stop valve (22); one end of the geothermal energy branch provided with a twelfth stop valve (22) is connected with the heat source branch in parallel and then connected with one end of the cooling tower branch in parallel through a first circulating water pump (24);
the pumping well/recharging well (20) and the recharging well/pumping well (21) of the geothermal energy branch are respectively connected with a thirteenth stop valve (12) and a fourteenth stop valve (23) in parallel; one end of the thirteenth stop valve (12) is connected with the well mouth of the pumping well/recharging well (20), and the other end of the thirteenth stop valve is connected with the inlet of the second circulating water pump (10); one end of a fourteenth stop valve (23) is connected with the well mouth of the recharge/pumping well (21), and the other end of the fourteenth stop valve is connected with the outlet of the first circulating water pump (24).
Compared with the prior art, the invention has the beneficial effects that:
1. the energy-saving composite heat pump system utilizes natural energy sources such as air energy, shallow geothermal energy, solar energy and the like on the basis of the prior art, and is energy-saving and environment-friendly.
2. According to the energy-saving composite heat pump system, an air source heat pump system or a water source heat pump system with higher heat exchange efficiency can be adopted for refrigeration according to actual conditions; during heating, various heat source forms such as air energy, shallow geothermal energy, a heat source tower and solar energy can be adopted in the daytime to be matched, valley electricity is utilized at night to use the air energy, the shallow geothermal energy or the heat source tower as heat sources, the unit is enabled to operate in the optimal heat source form all the time through timely adjustment, the operation cost can be greatly saved, and the unit efficiency is improved.
Drawings
FIG. 1 is a flow chart of the system of the present invention during refrigeration of an energy-saving compound heat pump system;
fig. 2 is a flow chart of the system for heating the energy-saving compound heat pump system according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
The overall structure of the energy-saving composite heat pump system provided by the invention is shown in figure 1 or figure 2, and comprises a refrigerating/heating loop, a cooling tower branch and a heat source branch, wherein the refrigerating/heating loop is formed by sequentially connecting a compressor 1, a four-way reversing valve 2, a use side heat exchanger 3, a throttling mechanism 4 with a bidirectional throttling function and a cooling side/heat source side heat exchanger in sequence; the use side heat exchanger 3 is connected with external fan coil and other terminal equipment; the cooling side/heat source side heat exchanger is formed by connecting a finned heat exchanger 5 and a shell-and-tube heat exchanger 7 in parallel, two ends of the finned heat exchanger 5 are respectively connected with a first stop valve 6 and a second stop valve 27, and two ends of the shell-and-tube heat exchanger 7 are respectively connected with a third stop valve 8 and a fourth stop valve 26; the cooling tower branch and the heat source branch are connected in parallel and then connected with the shell-and-tube heat exchanger 7;
the heat source branch is formed by connecting a heat source tower branch and a solar heat collector branch in parallel; the heat source tower branch comprises a heat source tower 15, a fifth stop valve 14 and a sixth stop valve 19 which are respectively connected to the two ends of the heat source tower, the solar heat collector branch comprises a solar heat collector 17, a seventh stop valve 16 and an eighth stop valve 18 which are respectively connected to the two ends of the solar heat collector, and one end of the heat source branch is connected with one end of the cooling tower branch in parallel through a first circulating water pump 24;
the cooling tower branch is formed by sequentially connecting a ninth stop valve 25, a cooling tower 11, a tenth stop valve 9 and a second circulating water pump 10 in sequence; the ninth stop valve 25 is connected in parallel with one end of the heat source branch provided with the first circulating water pump 24, and the tenth stop valve 9 and the second circulating water pump 10 are connected in parallel with the other end of the heat source branch.
In addition, the composite heat pump system can select shallow geothermal energy as a cold source in a refrigeration mode or a heat source in a heating mode of the ground source heat pump system according to geological conditions and policies of an application area; at this time, the composite heat pump system of the present invention further includes a geothermal energy branch (as shown in fig. 1 or fig. 2) connected in parallel with the cooling tower branch and the heat source branch, and the geothermal energy branch is formed by sequentially connecting an eleventh stop valve 13, a pumping well/recharging well 20, a recharging well/pumping well 21, and a twelfth stop valve 22; one end of the geothermal energy branch is provided with a twelfth stop valve 22 and is connected with the heat source branch in parallel, and then is connected with one end of the cooling tower branch in parallel through a first circulating water pump 24;
the pumping well/recharging well 20 and the recharging well/pumping well 21 of the geothermal energy branch are respectively connected with a thirteenth stop valve 12 and a fourteenth stop valve 23 in parallel; wherein, one end of the thirteenth stop valve 12 is connected with the well mouth of the pumping well/recharging well 20, and the other end is connected with the inlet of the second circulating water pump 10; one end of the fourteenth stop valve 23 is connected with the wellhead of the recharge/suction well 21, and the other end is connected with the outlet of the first circulating water pump 24.
The components in the energy-saving combined heat pump system are conventional products, all the components in a refrigerating/heating loop are connected by welding through copper tubes or in other conventional connection modes, and all the components in a heat source branch, a geothermal energy branch and a cooling tower branch are connected by welding through steel tubes, flanges and the like or in other conventional connection modes; the four-way reversing valve is provided with a changeover switch with a refrigeration mode and a heating mode.
The heat pump system realizes the switching between the refrigeration mode and the heating mode through the control of the four-way reversing valve 2, realizes the selection of different cold sources and heat sources by controlling the starting and stopping of the corresponding stop valves, and can realize the switching between the pumping well and the recharging well in the geothermal energy branch circuit by controlling the starting and stopping of the eleventh stop valve 13, the twelfth stop valve 22, the thirteenth stop valve 12, the fourteenth stop valve 23, the first circulating water pump 24 and the second circulating water pump 10. The working process or principle of the heat pump system is as follows:
in the cooling mode, the four-way selector valve 2 is switched to the cooling position (as shown in fig. 1): the third stop valve 8, the fourth stop valve 26, the ninth stop valve 25, the tenth stop valve 9 and the second water circulating pump 10 are opened, and the rest stop valves and the first water circulating pump 24 are closed, so that the shell-and-tube heat exchanger 7 (serving as a condenser) in the cooling side/heat source side heat exchanger and the cooling tower branch (cooling water in the cooling tower branch serves as a cold source) work, and at the moment, the system is a water source heat pump system; or, the third stop valve 8, the fourth stop valve 26, the fourteenth stop valve 23, the thirteenth stop valve 12 and the second water circulation pump 10 are opened, and the rest of the stop valves and the first water circulation pump 24 are closed, so that the shell-and-tube heat exchanger 7 (serving as a condenser) in the cooling side/heat source side heat exchanger and the geothermal energy branch (well water in the geothermal energy branch serving as a cold source) work, and at this time, the system is a ground source heat pump system; or, the first stop valve 6, the second stop valve 27 are opened, the third stop valve 8, the fourth stop valve 26 and all the circulating water pumps are closed, so that the finned tube heat exchanger 5 (serving as a condenser) in the cooling side/heat source side heat exchanger works, and at the moment, the system is an air source heat pump system and can work by using valley electricity at night.
In the heating mode, the four-way reversing valve 2 is turned to a heat pump working position (as shown in fig. 2), the first stop valve 6 and the second stop valve 27 are opened, and the third stop valve 8, the fourth stop valve 26 and all the circulating water pumps are closed, so that the finned tube heat exchanger 5 in the cooling side/heat source side heat exchanger works, and the system is an air source heat pump system; or, the third stop valve 8, the fourth stop valve 26 and the first circulating water pump 24 are opened, and at least one group of the eleventh stop valve 13 and the twelfth stop valve 22 in the geothermal energy branch or the fifth stop valve 14 and the sixth stop valve 19 in the heat source tower branch or the seventh stop valve 16 and the eighth stop valve 18 in the solar heat collector branch is opened at the same time, so that the shell-and-tube heat exchanger 7 in the cooling side/heat source side heat exchanger and the geothermal energy branch or the heat source tower branch or the solar heat collector branch work; in the heating mode, the shell-and-tube heat exchanger 7 in the cooling side/heat source side heat exchanger is used as an evaporator as much as possible according to the situation in the daytime, any one or more than one of a geothermal energy branch circuit, a heat source tower 15 of a heat source branch circuit or a solar heat collector 17 can be selected to be used simultaneously to provide a heat source, the system is a ground source heat pump system when the geothermal energy branch circuit is selected to work, the system is a water source heat pump system when the heat source tower 15 is selected, and the system is a solar heat pump system when the solar heat collector 17 is selected; the finned tube heat exchanger 5 of the cooling side/heat source side heat exchanger can be used as an evaporator or the shell and tube heat exchanger 7 of the cooling side/heat source side heat exchanger (as an evaporator) and either the geothermal energy branch or the heat source tower branch can be used to work at night with valley electricity.
In summary, in the refrigeration mode, a ground source heat pump system or an air source heat pump system or a water source heat pump system composed of the cooling tower 11 may be selected according to the situation; in the heating mode, an air source heat pump system or a ground source heat pump system or a water source heat pump system taking the heat source tower 15 as a heat source or a solar heat pump system taking solar energy as a heat source can be selected according to the local actual weather condition in the daytime, and the ground source heat pump system or the air source heat pump system or the water source heat pump system taking the heat source tower 15 as the heat source can be used by valley electricity at night; therefore, the running mode of the unit is optimally matched with the actual environmental conditions through timely switching of various cold and heat source forms, and the purposes of low system running cost and energy conservation are further achieved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and adaptations can be made without departing from the principle of the present invention, and such modifications and adaptations should also be considered as the scope of the present invention.
Claims (2)
1. An energy-saving composite heat pump system is characterized by comprising a refrigerating/heating loop, a cooling tower branch and a heat source branch, wherein the refrigerating/heating loop is formed by sequentially connecting a compressor (1), a four-way reversing valve (2), a use side heat exchanger (3), a throttling mechanism (4) with a bidirectional throttling function and a cooling side/heat source side heat exchanger in sequence; the use side heat exchanger (3) is connected with external end equipment; the cooling side/heat source side heat exchanger is formed by connecting a finned heat exchanger (5) and a shell and tube heat exchanger (7) in parallel, two ends of the finned heat exchanger (5) are respectively connected with a first stop valve (6) and a second stop valve (27), and two ends of the shell and tube heat exchanger (7) are respectively connected with a third stop valve (8) and a fourth stop valve (26); the cooling tower branch and the heat source branch are connected in parallel and then are connected with a shell-and-tube heat exchanger (7);
the heat source branch is formed by connecting a heat source tower branch and a solar heat collector branch in parallel; the heat source tower branch comprises a heat source tower (15), a fifth stop valve (14) and a sixth stop valve (19) which are respectively connected to the two ends of the heat source tower, the solar heat collector branch comprises a solar heat collector (17), a seventh stop valve (16) and an eighth stop valve (18) which are respectively connected to the two ends of the solar heat collector, and one end of the heat source branch is connected with one end of the cooling tower branch in parallel through a first circulating water pump (24);
the cooling tower branch is formed by sequentially connecting a ninth stop valve (25), a cooling tower (11), a tenth stop valve (9) and a second circulating water pump (10); the ninth stop valve (25) is connected with one end of the heat source branch circuit, which is provided with the first circulating water pump (24), in parallel, and the tenth stop valve (9) is connected with the other end of the heat source branch circuit in parallel with the second circulating water pump (10).
2. The energy-saving composite heat pump system according to claim 1, further comprising a geothermal energy branch connected in parallel with the cooling tower branch and the heat source branch, wherein the geothermal energy branch is formed by sequentially connecting an eleventh stop valve (13), a pumping well/recharging well (20), a recharging well/pumping well (21) and a twelfth stop valve (22); one end of the geothermal energy branch provided with a twelfth stop valve (22) is connected with the heat source branch in parallel and then connected with one end of the cooling tower branch in parallel through a first circulating water pump (24);
the pumping well/recharging well (20) and the recharging well/pumping well (21) of the geothermal energy branch are respectively connected with a thirteenth stop valve (12) and a fourteenth stop valve (23) in parallel; one end of the thirteenth stop valve (12) is connected with the well mouth of the pumping well/recharging well (20), and the other end of the thirteenth stop valve is connected with the inlet of the second circulating water pump (10); one end of a fourteenth stop valve (23) is connected with the well mouth of the recharge/pumping well (21), and the other end of the fourteenth stop valve is connected with the outlet of the first circulating water pump (24).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611033824.4A CN106322813B (en) | 2016-11-15 | 2016-11-15 | Energy-saving combined type heat pump system |
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| CN201611033824.4A CN106322813B (en) | 2016-11-15 | 2016-11-15 | Energy-saving combined type heat pump system |
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| CN106322813A CN106322813A (en) | 2017-01-11 |
| CN106322813B true CN106322813B (en) | 2022-05-27 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895599A (en) * | 2017-03-31 | 2017-06-27 | 际高贝卡科技有限公司 | A kind of intelligent geothermal heat pump unit |
| CN107421163A (en) * | 2017-04-13 | 2017-12-01 | 西安汉清新能源科技有限公司 | Air electric energy twin-stage heating and refrigerating system and heating and refrigerating method |
| CN108332445A (en) * | 2018-02-05 | 2018-07-27 | 北京民利储能技术有限公司 | A kind of geothermal energy, solar energy, air energy hybrid current limiter |
| CN110553422B (en) * | 2019-08-07 | 2020-08-25 | 珠海格力电器股份有限公司 | Composite system of PVT coupled air source and control method |
| CN112556448A (en) * | 2020-11-10 | 2021-03-26 | 河南中烟工业有限责任公司 | Cooling system |
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| US4738305A (en) * | 1985-02-04 | 1988-04-19 | Bacchus Rockney D | Air conditioner and heat dispenser |
| JPH11281203A (en) * | 1998-01-27 | 1999-10-15 | Nkk Corp | Soil heat source heat pump system and its operation method |
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