CN108518779B - Fluid ice heat pump system - Google Patents
Fluid ice heat pump system Download PDFInfo
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- CN108518779B CN108518779B CN201810471364.6A CN201810471364A CN108518779B CN 108518779 B CN108518779 B CN 108518779B CN 201810471364 A CN201810471364 A CN 201810471364A CN 108518779 B CN108518779 B CN 108518779B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The present invention provides a fluidized ice heat pump system comprising: the outer water circulation loop, refrigerant circulation loop, solution inner circulation loop and user's circulation loop, solution inner circulation loop still includes: the liquid inlet of the energy storage tank is connected to a pipeline between the other side of the fluid ice evaporator and the second pump through an eighth two-way valve, the liquid outlet of the energy storage tank is connected to a pipeline between the second electric two-way valve and the sixth two-way valve through a twelfth two-way valve, a ninth two-way valve is further arranged on the pipeline between the liquid inlet of the energy storage tank and the second electric two-way valve and the sixth two-way valve, and a seventh two-way valve is further arranged on the pipeline between the liquid outlet of the energy storage tank and the other side of the fluid ice evaporator and the second pump; the system utilizes the solidification heat of water to take heat, which is 80 times of the sensible heat of the water, overcomes the defects of the original heat pump system, realizes the cross-season energy storage, is a revolutionary progress of the heat pump system, saves the running cost of the air conditioning system to the maximum extent, and plays a favorable role in balancing the power grid.
Description
Technical Field
The invention relates to a novel energy supply system, in particular to a fluid ice heat pump system.
Background
Energy and environment are two major problems facing today's mankind. Fossil fuels are currently the primary energy source for human production and life. With the increase of global energy use and unscientific use, non-renewable energy sources such as fossil fuels are increasingly exhausted and have serious influence on the environment. Heat pumps have a significant role in the heating industry as a clean renewable energy technology, and conventional heat pump technologies have their respective limitations.
Air energy (source) heat pumps are greatly affected by air temperature, and are commonly applied in southern areas of China. But suffers from frosting problems. The energy efficiency of the application in the north is lower.
Ground source heat pumps are affected by cost and site.
The water source heat pump has the following limitations:
1. surface water and sea water are utilized, and are limited by water temperature, and cannot be used under the temperature of 5 ℃ generally.
2. With groundwater there are regulatory, water quality and recharging technical problems.
3. The regenerated water is utilized and limited by a regenerated water pipe network.
The technology utilizes the solidification heat of water to take heat, which is 80 times of the sensible heat of the water, so that the defects of the heat pump system are overcome, and the revolutionary progress of the heat pump system is realized.
Disclosure of Invention
The invention aims to overcome the defects of the existing heat pump, and provides a fluid ice heat pump system which can realize heating in winter by utilizing a fluid ice heat pump and an energy storage tank, store cold in winter for use by an air conditioner in summer, store energy for use by the air conditioner system by using low-valley electricity for the rest part, and simultaneously utilize a water source of rivers, lakes and seas to discharge in the form of an ice-water mixture, thereby greatly reducing the water consumption of the heat pump.
The invention adopts supercooling technology, cools solution with certain concentration to a temperature with certain supercooling degree, and forms ice crystal in the solution by utilizing ice precipitation phenomenon of salt solution, and the principle of ice precipitation phenomenon is introduced below.
As shown in fig. 1, it is a solution concentration phase equilibrium diagram in which the abscissa represents the solution concentration, the ordinate represents the temperature, WE is the ice precipitation line, EG is the salt precipitation line, and point E is the eutectic point.
1. The upper part of the ice precipitation line and the salt precipitation line is a solution area; the area between the TE line and the ice separating line is an ice+solution coexistence area; the area between the TE line and the salt precipitation line is a solute and saturated solution coexistence area; the upper parts of the ice separating line and the salt separating line are solution areas; the lower part of the TE line is a solid coexistence area of ice and solute.
2. The solution with each concentration corresponds to an ice crystal (water ice) precipitation temperature, and ice crystals can be continuously precipitated when the temperature of the solution is reduced to the ice precipitation temperature.
3. The solution releases heat when the ice crystals are separated out, so that the temperature of the solution is slightly increased, and the temperature of the solution is slightly increased.
4. The usable solution of the fluid ice machine set is salt (sea water, naCl salt solution, etc.), alcohol (methanol, ethanol, glycerol, propylene glycol, glycol solution, etc.).
According to the property of glycol, the technology adopts glycol as a secondary refrigerant, and at the moment, the whole circulating glycol solution is in a solid-liquid mixed state, and when the mixed solution flows through an energy storage pool with a larger volume, ice crystals in the solution naturally float up, so that the aim of separating the ice crystals from the glycol solution is fulfilled.
In order to solve the technical problems, the technical scheme adopted by the fluidized ice heat pump system is as follows:
the invention relates to a fluidized ice heat pump system, which comprises: outer water circulation circuit, refrigerant circulation circuit, solution internal circulation circuit and user side circulation circuit, outer circulation circuit includes: an outer water circulation loop formed by sequentially connecting one side of a cooling tower, a fourth pump, a fifth two-way valve, a condenser and a first two-way valve in series; the refrigerant cycle circuit includes: a refrigerant circulation loop formed by sequentially connecting one side of the fluidized ice evaporator, the compressor, the other side of the condenser and the expansion valve in series; one side of the condenser is coupled with the other side of the condenser in the condenser, and the solution internal circulation loop comprises: the solution internal circulation loop formed by sequentially connecting the other side of the fluid ice evaporator, the second pump, one side of the heat exchanger, the second electric two-way valve, the sixth two-way valve and the first pump in series is formed, one side of the fluid ice evaporator and the other side of the fluid ice evaporator are mutually coupled in the fluid ice evaporator, and the user side circulation loop comprises: the other side of the heat exchanger, the third pump, the user side and the third two-way valve are sequentially connected in series to form a user side circulation loop, one side of the heat exchanger and the other side of the heat exchanger are mutually coupled in the heat exchanger, two ends of one side of the condenser are respectively connected with two ends of the other side of the heat exchanger through the second two-way valve and the fourth two-way valve, and the two ends of the one side of the condenser are respectively connected with two ends of the other side of the heat exchanger, wherein: the solution internal circulation loop further comprises: the liquid inlet of the energy storage tank is connected to a pipeline between the other side of the fluid ice evaporator and the second pump through an eighth two-way valve, the liquid outlet of the energy storage tank is connected to a pipeline between the second electric two-way valve and the sixth two-way valve through a twelfth two-way valve, a ninth two-way valve is further arranged on the pipeline between the liquid inlet of the energy storage tank and the second electric two-way valve and the sixth two-way valve, and a seventh two-way valve is further arranged on the pipeline between the liquid outlet of the energy storage tank and the other side of the fluid ice evaporator and the second pump;
the invention relates to a fluidized ice heat pump system, wherein: in the solution internal circulation loop, a pipeline with a first electric two-way valve is arranged between a liquid inlet of a second pump and one side of the heat exchanger and the second electric two-way valve;
the invention relates to a fluidized ice heat pump system, wherein: the solution flowing in the solution internal circulation loop is seawater, naCl salt solution, methanol, ethanol, glycerol, propylene glycol or ethylene glycol solution, and the freezing point of the solution is less than 0 ℃.
The invention relates to a fluidized ice heat pump system, wherein: the fluidized ice evaporator includes: the top of the evaporator shell is provided with a motor, the upper part in the evaporator shell is provided with a top support plate and an upper baffle plate from top to bottom, the space between the top support plate and the upper baffle plate is a fluid ice collecting cavity, the lower part in the evaporator shell is provided with a lower baffle plate, the space separated by the lower baffle plate and the lower part of the evaporator shell is a liquid secondary refrigerant cavity, a plurality of baffle plates are arranged between the upper baffle plate and the lower baffle plate along the height direction of the evaporator shell, a plurality of tubes are arranged in the evaporator shell space between the upper baffle plate and the lower baffle plate, the tubes sequentially penetrate through the upper baffle plate, the baffle plates and the lower baffle plate from top to bottom, the upper ends of the tubes are communicated with the fluid ice collecting cavity, the lower ends of the tubes are communicated with the liquid secondary refrigerant cavity, a spiral stirring shaft is arranged in each tube, the upper end of the spiral stirring shaft penetrates through the top supporting plate and is driven by a motor through a transmission device, the lower end of the spiral stirring shaft is supported at the lower end of the evaporator shell, a liquid-state secondary refrigerant inlet is formed in the evaporator shell of the liquid-state secondary refrigerant cavity, a liquid-state ice mixed solution outlet is formed in the evaporator shell of the liquid-state ice converging cavity, a liquid-state refrigerant inlet is formed in the evaporator shell between the baffle plate at the lowest end and the lower baffle plate, a gaseous-state refrigerant outlet is formed in the evaporator shell between the upper baffle plate and the baffle plate at the uppermost end, a plurality of deflector holes are formed in one half area of each baffle plate in the evaporator shell, the open hole area of the adjacent baffle plate is formed in the other half area of the baffle plate adjacent to the deflector hole area, the liquid-state refrigerant flows in a zigzag shape in the evaporator shell, and the gap between the spiral stirring shaft and the tube wall is 5 cm-10 cm, the rotating speed of the spiral stirring shaft is 500-600 rpm, the spiral stirring shaft is a spiral rod, the spiral angle of the spiral rod is 40-50 degrees, and the number of heads of the spiral rod is 6-10;
the invention relates to a fluidized ice heat pump system, wherein: the outlet of the fluid ice mixed solution extends into the fluid ice converging cavity and is communicated with the fluid ice converging cavity through an anti-ice blocking horn mouth, and the included angle of the anti-ice blocking horn mouth is 20-30 degrees;
the invention relates to a fluidized ice heat pump system, wherein: the transmission device comprises: the stirring device comprises a driving wheel, a driven wheel, a driving wheel and a plurality of stirring gears, wherein the upper end of each spiral stirring shaft is provided with one stirring gear, a motor drives the driving wheel to rotate, the driving wheel is meshed with the driven wheel, the driven wheel and the driving wheel are arranged on the same rotating shaft, the driving wheel is meshed with the stirring gears arranged at the center of the evaporator shell, the stirring gears are meshed with the adjacent stirring gears, and the driving wheel drives the stirring gears in all the evaporator shells to rotate;
the invention relates to a fluidized ice heat pump system, wherein: the baffle plates are uniformly distributed along the height direction of the evaporator shell, and the number of the baffle plates is 5-20;
the invention relates to a fluidized ice heat pump system, wherein: the bottom end of the spiral stirring shaft is arranged at the lower end of the evaporator shell through a stirrer thrust limiter, and the tubes are uniformly distributed in the space of the evaporator shell;
the invention relates to a fluidized ice heat pump system, wherein: the energy storage tank comprises: the device comprises a shell, a liquid solution outlet pipe, an ice water mixing liquid inlet pipe and a liquid supplementing pipe, wherein the ice water mixing liquid inlet pipe is arranged above the shell, a plurality of liquid spraying holes are formed in the ice water mixing liquid inlet pipe, the liquid solution outlet pipe is arranged below the shell, a plurality of liquid absorbing holes are formed in the liquid solution outlet pipe, the upper end of the shell is connected with the liquid supplementing pipe, the ice water mixing solution enters the shell from the ice water mixing liquid inlet pipe, a lower solution layer is formed by sinking the solution below the shell, an ice slurry layer floats on the lower solution layer, and an energy storage pool is buried in a stratum below a frozen soil layer;
the invention relates to a fluidized ice heat pump system, wherein: the shell is a heat-insulating and waterproof shell.
After the technical scheme is adopted, the fluid ice heat pump system has the following advantages:
1. the energy saving and emission reduction number calling of the corresponding country realizes that the winter cooling capacity is moved to summer.
2. The heating system can be operated independently without the need for other external heat sources.
3. The heat pump system utilizes the heat source more fully, and the solidification heat of ice is 80 times that of water.
4. The installed capacity of the project air conditioning system can be reduced, and the point net is balanced.
5. Reduces the running cost of the project in winter and summer and creates economic benefit to the maximum extent.
The technology saves energy and reduces emission for China, saves running cost for enterprises, saves resources, and is a good technology for people to benefit China, enterprises and people for China.
The invention uses the heat pump as a clean renewable energy source technology, plays a role in the heating industry, and the traditional heat pump technology has respective limitations. The system utilizes the solidification heat of water to take heat, which is 80 times of the sensible heat of the water, so that the defects of the original heat pump system are overcome, and the revolutionary progress of the heat pump system is realized. The fluid ice heat pump system comprises a fluid ice heat pump, an energy storage tank, a water pump and other devices, can realize independent operation of the building in winter without depending on other heat sources, takes heat from solution in the energy storage tank, separates ice crystals out of the solution and fills the energy storage tank, uses the cold energy of the ice crystals for cooling in summer, recycles off-peak electricity for cold accumulation in the deficient part, saves the operation cost of the air conditioning system to the maximum extent, and plays an advantageous role in balancing a power grid. The heat energy source of the technology can be expanded to heat sources such as rivers, lakes and seas, and the like, can be used in the whole heating area in China, and has extremely wide application range.
The novel fluid ice heat pump system is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a solution concentration phase equilibrium diagram;
fig. 2 is a schematic system diagram of a fluidized ice heat pump.
FIG. 3 is a schematic illustration of the system of FIG. 2 during winter heating;
FIG. 4 is a schematic illustration of the system of FIG. 2 during a summer season;
FIG. 5 is a schematic illustration of the system of FIG. 2 during summer ice storage;
FIG. 6 is a schematic diagram of the system of FIG. 2 during a summer combined cooling operation;
FIG. 7 is a schematic cross-sectional view of the fluidized ice evaporator of FIG. 2;
FIG. 8 is a schematic cross-sectional view taken at A-A of FIG. 7, FIG. 8 showing the meshing drive relationship between the drive wheel and the agitator gear for clarity;
figure 9 is an enlarged schematic view of the helical mixing shaft of figure 7,
fig. 10 is a schematic cross-sectional view of the accumulator of fig. 2.
In fig. 2 to 6, reference numeral 101A is a first two-way valve; reference numeral 101B is a second two-way valve; reference numeral 101C is a third two-way valve; reference numeral 101D is a fourth two-way valve; reference numeral 101E is a fifth two-way valve; reference numeral 101F is a sixth two-way valve; reference numeral 101G is a seventh two-way valve; reference numeral 101H is an eighth two-way valve; reference numeral 101I is a ninth two-way valve; reference numeral 101J is a twelfth pass valve; reference numeral 102 is an energy storage reservoir; reference numeral 103 is a heat exchanger; reference numeral 104 denotes a first pump; reference numeral 105 denotes a second pump; reference numeral 106 denotes a third pump; reference numeral 107 denotes a user terminal; reference numeral 108 denotes a fourth pump; reference numeral 109 denotes a cooling tower; reference numeral 110 is a compressor; reference numeral 111 denotes a condenser; reference numeral 112 is a fluidized ice evaporator; reference numeral 113 denotes an expansion valve; reference numeral 114 denotes an outer water circulation circuit; reference numeral 115 denotes a refrigerant circulation circuit; reference numeral 116 denotes an in-solution circulation circuit; reference numeral 117 denotes a client circulation loop; reference numeral 118A is a first electric two-way valve; reference numeral 118B is a second electrically operated two-way valve.
In fig. 7, 8 and 9, reference numeral 1 denotes a fluidized ice mixed solution outlet; reference numeral 2 is an anti-icing and anti-blocking bell mouth; reference numeral 3 is a motor; reference numeral 4 is a transmission device; reference numeral 5 is a spiral stirring shaft; reference numeral 6 is an evaporator housing; reference numeral 7 is a top support plate; reference numeral 8 is a fluidized ice sink cavity; reference numeral 9 is an upper partition plate; reference numeral 10 is a tubulation; reference numeral 11 is a baffle plate; reference numeral 12 is a deflector aperture; reference numeral 13 is a liquid refrigerant inlet; reference numeral 14 is a lower partition; reference numeral 15 is a stirrer thrust limiter; reference numeral 16 designates a liquid coolant inlet; reference numeral 17 is a liquid coolant cavity; reference numeral 18 is a gaseous refrigerant outlet; reference numeral 19 denotes a drive wheel; reference numeral 20 is a stirring gear; reference numeral 21 is a driving wheel; reference numeral 22 denotes a driven wheel;
in FIG. 10, reference numeral 23 is a lower solution layer; reference numeral 24 denotes a liquid suction hole; reference numeral 25 is a liquid solution outlet pipe; reference numeral 26 denotes a fluid replacement pipe; reference numeral 27 is a housing; reference numeral 28 is an ice water mixing liquid inlet pipe; reference numeral 29 denotes a liquid ejecting hole; reference numeral 30 is an upper ice slurry layer.
Detailed Description
As shown in fig. 2, the fluid ice heat pump system of the present invention includes: the external water circulation circuit 114, the refrigerant circulation circuit 115, the solution internal circulation circuit 116, and the user side circulation circuit 117, and the external water circulation circuit 114 includes: an outer water circulation loop consisting of a cooling tower 109, a fourth pump 108, a fifth two-way valve 101E, one side of a condenser 111 and a first two-way valve 101A which are sequentially connected in series; the refrigerant circulation circuit 115 includes: a refrigerant circulation loop formed by sequentially connecting one side of the fluidized ice evaporator 112, the compressor 110, the other side of the condenser 111 and the expansion valve 113 in series; one side of the condenser 111 and the other side of the condenser 111 6 are coupled to each other in the condenser 111, and the in-solution circulation circuit 116 includes: the solution internal circulation loop formed by sequentially connecting the other side of the fluid ice evaporator 112, the second pump 105, one side of the heat exchanger 103, the second electric two-way valve 118B, the sixth two-way valve 101F and the first pump 104 in series is that one side of the fluid ice evaporator 112 and the other side of the fluid ice evaporator 112 are mutually coupled in the fluid ice evaporator 112, and the user side circulation loop 117 comprises: the other side of the heat exchanger 103, the third pump 106, the user end 107 and the third two-way valve 101C are sequentially connected in series to form a user end circulation loop, one side of the heat exchanger 103 and the other side of the heat exchanger 103 are mutually coupled in the heat exchanger 103, and two ends of one side of the condenser 111 are respectively connected with two ends of the other side of the heat exchanger 103 through the second two-way valve 101B and the fourth two-way valve.
The in-solution circulation loop 116 further includes: the liquid inlet of the energy storage tank 102 is connected to a pipeline between the other side of the fluid ice evaporator 112 and the second pump 105 through an eighth two-way valve 101H, the liquid outlet of the energy storage tank 102 is connected to a pipeline between the second electric two-way valve 118B and the sixth two-way valve 101F through a twelfth two-way valve 101J, a ninth two-way valve 101I is further arranged on the pipeline between the liquid inlet of the energy storage tank 102 and the second electric two-way valve 118B and the sixth two-way valve 101F, and a seventh two-way valve 101G is further arranged on the pipeline between the liquid outlet of the energy storage tank 102 and the other side of the fluid ice evaporator 112 and the second pump 105. In the solution internal circulation circuit 116, a pipe with a first electric two-way valve 118A is provided between the liquid inlet of the second pump 105 and one side of the heat exchanger 103 and the second electric two-way valve 118B. The solution flowing in the solution internal circulation loop 116 is seawater, naCl salt solution, methanol, ethanol, glycerol, propylene glycol or ethylene glycol solution, and the freezing point of the solution is less than 0 ℃.
As shown in fig. 7, the fluidized ice evaporator 112 includes: the evaporator comprises an evaporator shell 6, a motor 3, a transmission device 4, an upper partition 9, a lower partition 14, a baffle plate 11 and a top support plate 7, wherein the motor 3 is arranged at the top of the evaporator shell 6, the top support plate 7 and the upper partition 9 are sequentially arranged at the upper part in the evaporator shell 6 from top to bottom, a space between the top support plate 7 and the upper partition 9 is a fluid ice converging cavity 8, a fluid ice mixed solution outlet 1 extends into the fluid ice converging cavity 8 and is communicated with the fluid ice converging cavity 8 through an anti-ice blocking horn mouth 2, and the included angle of the anti-ice blocking horn mouth 2 is 20-30 degrees. The lower part of the evaporator shell 6 is provided with a lower baffle 14, the space formed by the lower baffle 14 and the lower part of the evaporator shell 6 is a liquid secondary refrigerant cavity 17, a plurality of baffle plates 11 are arranged between the upper baffle 9 and the lower baffle 14 along the height direction of the evaporator shell 6, a plurality of tubes 10 are arranged in the space of the evaporator shell 6 between the upper baffle 9 and the lower baffle 14, the tubes 10 sequentially pass through the upper baffle 9, the baffle plates 11 and the lower baffle 14 from top to bottom, the upper ends of the tubes are communicated with a fluidized ice converging cavity 8, the lower ends of the tubes are communicated with the liquid secondary refrigerant cavity 17, a spiral stirring shaft 5 is arranged in each tube 10, the upper end of the spiral stirring shaft 5 passes through a top support plate 7 and is driven by a motor 3 through a transmission device 4, the lower end of the spiral stirring shaft 5 is supported at the lower end of the evaporator shell 6, a liquid refrigerant inlet 16 is formed in the evaporator shell 6 of the liquid secondary refrigerant cavity 17, a fluidized ice mixed solution outlet 1 is formed in the evaporator shell 6 of the fluidized ice converging cavity 8, the upper end 11 is formed in the evaporator shell 6 in the area between the uppermost baffle plate 11 and the upper baffle plate 11 and the lower baffle plate 6, a plurality of baffle plates 11 are formed in the adjacent to the evaporator shell 6, a plurality of the baffle plates 11 are formed in the area between the upper baffle plates 11 and the upper baffle plate 11 in the area in the adjacent area of the evaporator shell 6, and the area is formed in the area between the upper baffle plates 11 and the upper baffle plate is formed in the area adjacent to the upper baffle plate 11. The baffles 11 are uniformly distributed along the height direction of the evaporator shell 6, and the number of the baffles is 5-20. The gap between the spiral stirring shaft 5 and the tube wall of the tube array 10 is 5-10cm, the rotating speed of the spiral stirring shaft 5 is 500-600 rpm, the spiral stirring shaft 5 is a spiral rod, the spiral angle of the spiral rod is 40-50 degrees, and the number of heads of the spiral rod is 6-10. The bottom end of the spiral stirring shaft 5 is arranged at the lower end of the evaporator shell 6 through a stirrer thrust limiter 15, and the tubes 10 are uniformly distributed in the space of the evaporator shell 6.
Principle of ice slurry preparation: the flow rate and evaporation temperature of the refrigerant are controlled so that the refrigerant evaporates in the fluidized ice evaporator 112 at a temperature of about-3 c, and ice crystals are deposited in the surface of the tube bundle 10 as the heat of the solution in the tube bundle is transferred. The stirring rod has two functions, namely, centrifugal force is generated in the rotation process to wash the surface of the tube array 10, and ice crystals on the surface of the evaporator tube array 10 are washed down; the second is that the stirring rod is in a screw shape, and has upward thrust besides centrifugal force, after centrifugal flushing, the mixed solution is lifted into the fluidized ice collecting cavity 8 as soon as possible, so that the mixed solution is prevented from being condensed and accumulated on the inner surface of the tube array 10.
As shown in fig. 7, 8 and 9, the transmission 4 includes: the stirring device comprises a driving wheel 19, a driven wheel 22, a driving wheel 21 and a plurality of stirring gears 20, wherein the upper end of each spiral stirring shaft 5 is provided with one stirring gear 20, a motor 3 drives the driving wheel 19 to rotate, the driving wheel 19 is meshed with the driven wheel 22, the driven wheel 22 and the driving wheel 21 are arranged on the same rotating shaft, the driving wheel 21 is meshed with the stirring gears 20 arranged at the center of the evaporator shell 6, the stirring gears 20 are meshed with the stirring gears 20 adjacent to the stirring gears, and the driving wheel 21 drives all the stirring gears 20 in the evaporator shell 6 to rotate.
As shown in fig. 10, the accumulator 102 includes: the device comprises a shell 27, a liquid solution outlet pipe 25, an ice water mixing liquid inlet pipe 28 and a liquid supplementing pipe 26, wherein the ice water mixing liquid inlet pipe 28 is arranged above the shell 27, a plurality of liquid spraying holes 29 are formed in the ice water mixing liquid inlet pipe 28, the liquid solution outlet pipe 25 is arranged below the shell 27, a plurality of liquid absorbing holes 24 are formed in the liquid solution outlet pipe 25, the upper end of the shell 27 is connected with the liquid supplementing pipe 26, an ice water mixing solution enters the shell 27 from the ice water mixing liquid inlet pipe 28, a lower solution layer 23 is formed under the shell 27 by sinking the solution, and an upper ice slurry layer 30 floats on the lower solution layer 23. The housing 27 is a heat-insulating and waterproof housing, and the energy storage reservoir 102 is buried in the stratum below the frozen soil layer. When the accumulator 102 is filled with ice, the liquid replenishing pipe 26 is opened, the liquid replenishing pipe 26 is fed with solution so that the ice starts to melt, and returns to the lower part of the shell 27 again to form a lower solution layer 23, the lower solution layer 23 floats up with the upper ice slurry layer 30, and the liquid suction hole 24 on the liquid solution outlet pipe 25 sucks out the cold solution.
In winter, in the fluidized ice heat pump system of the present invention, the first, third, fifth, seventh, and ninth two-way valves 101A, 101C, 101E, and 101I, the first and second electric two-way valves 118A, and 118B are closed, the second, eighth, twelfth, sixth, and fourth two-way valves 101B, 101H, 101J, and 101D are opened, the cooling tower 109, and the heat exchanger 103 are not operated, and the fluidized ice heat pump system is simplified to a schematic diagram as shown in fig. 3, that is, the outer-end water circulation loop 114 and a part of the solution internal circulation loop 116 are removed, and it includes: the refrigeration cycle 115 and the energy storage pool 102, the first pump 104 pumps the solution from the energy storage pool 102 and sends the solution to the fluid ice evaporator 112, due to the special design of the fluid ice evaporator 112, ice crystals can be separated out, after absorbing heat by the fluid ice evaporator 112, the solution processed by the refrigeration cycle forms a mixed fluid of ice crystals and the solution, when the fluid flows through the energy storage pool 102, the ice crystals float from the solution due to the change of pressure and float above the liquid level, the rest of the solution is pumped to the fluid ice evaporator 112 through the first pump 4, and the heat absorption is continued to form the ice crystals, so that the cycle is completed. The low-temperature water flowing back from the cold and hot user 107 on the condenser 111 side of the refrigeration cycle 115 is heated on the condenser 111 side of the refrigeration cycle 115, and after reaching the heating temperature, is sent to the cold and hot user 107 by the third pump 6 to complete the heating cycle. The amount of ice in the accumulator 102 gradually increases until full.
In the early summer, in the fluidized ice heat pump system of the present invention, the first, second, fourth, fifth, sixth, eighth, and twelfth two-way valves 101A, 101B, 101D, 101E, 101F, 101H, and 101J are closed, and the ninth, seventh, third, and first and second electric two-way valves 101I, 101G, 101C, 118A, and 118B are opened. The energy storage tank 102 is full of ice, the cooling tower 109, the condenser 111, the compressor 110, the expansion valve 113, the fluidized ice evaporator 112 and the first pump 104 are not operated, the fluidized ice heat pump system is simplified as shown in fig. 4, namely, an external water circulation loop 114 and a refrigeration cycle 115 are removed, the energy storage tank 102 only supplies cold to the user end 107, at the moment, the liquid supplementing pipe 26 of the energy storage tank 102 is opened, the liquid supplementing pipe 26 is fed with solution to enable the ice to start melting, the second pump 105 pumps out low-temperature solution from the lower part of the energy storage tank 102, the low-temperature solution is heated by the heat exchanger 103 and then is fed back to the upper part of the energy storage tank 102 by a pipeline, and the ice melting is continued to complete the cycle. After the water flowing into the other side of the heat exchanger 3 is cooled to the cooling required temperature, the water is sent to the cold and hot user 7 by the third pump 6 to refrigerate, and the refrigeration cycle is realized.
When the ice amount in the accumulator 102 is nearly used up in summer and when the user side does not need to supply cold, the second two-way valve 101B, the third two-way valve 101C, the fourth two-way valve 101D, the seventh two-way valve 101G and the ninth two-way valve 101I, the first electric two-way valve 118A and the second electric two-way valve 118B are closed, the first two-way valve 101A, the eighth two-way valve 101H, the twelfth two-way valve 101J, the sixth two-way valve 101F and the fifth two-way valve 101E are opened, the heat exchanger 103, the third pump 6 and the user side 107 are not operated, the fluid ice heat pump system is simplified to a schematic diagram as shown in fig. 5, at this time, the refrigeration cycle 115 needs to be started, ice is continuously made in the low electric power period, the ice amount in the accumulator 102 is replenished, the fourth pump 108 realizes the cooling water cycle on the condenser 111 side of the refrigeration cycle 115, the heat absorbed by the condenser 111 is dissipated through the cooling tower 109, the fluid ice evaporator 112 of the refrigeration cycle 115 continuously feeds the ice solution into the accumulator 102 through the first pump 104, the power side, the fluid ice pump system is opened in the power peak period, and the power balance is kept at the user side 107 for the user side.
In the combined cooling in summer, the refrigeration cycle 115 and the energy storage tank 102 simultaneously supply the cooling to the system, the first two-way valve 101A, the third two-way valve 101C, the fifth two-way valve 101E, the sixth two-way valve 101F, the seventh two-way valve 101G, the ninth two-way valve 101I, the first electric two-way valve 118A and the second electric two-way valve 118B are opened, the second two-way valve 101B, the fourth two-way valve 101D, the eighth two-way valve 101H and the twelfth two-way valve 101J are closed, as shown in fig. 6, cold water from the fluid ice evaporator 112 and the energy storage tank 102 is sent to the heat exchanger 103 through the second pump 105, the temperature of the cold water is increased and then returned to the fluid ice evaporator 112 and the energy storage tank 102 for cooling, and the amounts of solution entering the fluid ice evaporator 112 and the energy storage tank 102 can be automatically matched according to the flow difference between the second pump 105 and the first pump 104. The cold energy stored in the energy storage tank 102 exists in the form of ice, the solution with higher temperature is required to be sprayed out from the upper part of the energy storage tank 102 through the switching of the ninth two-way valve 101I, the ice floating on the surface of the solution is melted and then cooled, and the ice is pumped into the second pump 105 from the bottom of the energy storage tank 102 through the seventh two-way valve 101G. The bypass pipeline which is connected with the refrigeration cycle 115 and the energy storage pool 102 in parallel and provided with the first electric two-way valve 118 mainly plays a role in adjusting water temperature, and ensures that the water inlet temperature at one side of the heat exchanger 103 is constant, thereby ensuring that the water temperature at the user side 107 is constant. On the other side of the plate heat exchanger 103, cold water generated by the heat exchanger 103 is sent to the user end 107 through the third pump 106 to cool the building indoors, and then water with increased temperature from the user end 107 returns to the heat exchanger 103 to cool, so that cooling circulation is realized. On the condenser 111 side of the refrigeration cycle 115, cooling water generated in the cooling tower 109 is sent to the condenser 111 side of the refrigeration cycle 115 by the fourth pump 8, and heat is radiated to the refrigeration cycle 115.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (8)
1. A fluidic ice heat pump system comprising: an outer water circulation circuit (114), a refrigerant circulation circuit (115), an inner solution circulation circuit (116), and a user side circulation circuit (117), the outer water circulation circuit (114) comprising: an outer water circulation loop formed by sequentially connecting one side of a cooling tower (109), a fourth pump (108), a fifth two-way valve (101E), a condenser (111) and a first two-way valve (101A) in series; the refrigerant cycle circuit (115) includes: a refrigerant circulation loop formed by sequentially connecting one side of a fluidized ice evaporator (112), the other side of a compressor (110), a condenser (111) and an expansion valve (113) in series; one side of the condenser (111) and the other side of the condenser (111) are coupled with each other in the condenser (111), and the in-solution circulation loop (116) includes: the solution internal circulation loop formed by sequentially connecting the other side of the fluid ice evaporator (112), one side of the second pump (105), one side of the heat exchanger (103), the second electric two-way valve (118B), the sixth two-way valve (101F) and the first pump (104) in series is formed, one side of the fluid ice evaporator (112) and the other side of the fluid ice evaporator (112) are mutually coupled in the fluid ice evaporator (112), and the user side circulation loop (117) comprises: the system is characterized in that the system comprises a user side circulation loop formed by sequentially connecting the other side of a heat exchanger (103), a third pump (106), a user side (107) and a third two-way valve (101C) in series, wherein one side of the heat exchanger (103) is mutually coupled with the other side of the heat exchanger (103), and two ends of one side of a condenser (111) are respectively connected with two ends of the other side of the heat exchanger (103) through a second two-way valve (101B) and a fourth two-way valve (101D), and the system is characterized in that: the in-solution circulation loop (116) further comprises: the liquid inlet of the energy storage tank (102) is connected to a pipeline between the other side of the fluid ice evaporator (112) and the second pump (105) through an eighth two-way valve (101H), the liquid outlet of the energy storage tank (102) is connected to a pipeline between the second electric two-way valve (118B) and the sixth two-way valve (101F) through a twelfth two-way valve (101J), a ninth two-way valve (101I) is further arranged on the pipeline between the liquid inlet of the energy storage tank (102) and the second electric two-way valve (118B) and the sixth two-way valve (101F), a seventh two-way valve (101G) is further arranged on the pipeline between the liquid outlet of the energy storage tank (102) and the other side of the fluid ice evaporator (112) and the second pump (105), and a pipeline with the first electric two-way valve (118A) is arranged between the liquid inlet of the second pump (105) and one side of the heat exchanger (103) and the second electric two-way valve (118B) in the solution circulation loop (116); the energy storage tank (102) comprises: the device comprises a shell (27), a liquid solution liquid outlet pipe (25), an ice water mixing liquid inlet pipe (28) and a liquid supplementing pipe (26), wherein the ice water mixing liquid inlet pipe (28) is arranged above the shell (27), a plurality of liquid spraying holes (29) are formed in the ice water mixing liquid inlet pipe (28), the liquid solution liquid outlet pipe (25) is arranged below the shell (27), a plurality of liquid absorbing holes (24) are formed in the liquid solution liquid outlet pipe (25), the upper end of the shell (27) is connected with the liquid supplementing pipe (26), an ice water mixing solution enters the shell (27) from the ice water mixing liquid inlet pipe (28), a lower solution layer (23) is formed below the shell (27) by solution sinking, an upper ice slurry layer (30) floats on the lower solution layer (23), and an energy storage pool (102) is buried in a stratum below a frozen soil layer.
2. A fluid ice heat pump system according to claim 1, wherein: the solution flowing in the solution internal circulation loop (116) is seawater, naCl salt solution, methanol, ethanol, glycerol, propylene glycol or ethylene glycol solution, and the freezing point of the solution is less than 0 ℃.
3. A fluid ice heat pump system according to claim 2, wherein: the fluidized ice evaporator (112) comprising: the evaporator comprises an evaporator shell (6), a motor (3), a transmission device (4), an upper baffle plate (9), a lower baffle plate (14), a baffle plate (11) and a top support plate (7), wherein the motor (3) is arranged at the top of the evaporator shell (6), the top support plate (7) and the upper baffle plate (9) are sequentially arranged at the upper part in the evaporator shell (6) from top to bottom, a space between the top support plate (7) and the upper baffle plate (9) is a fluidized ice collecting cavity (8), the lower baffle plate (14) is arranged at the lower part in the evaporator shell (6), a space separated by the lower baffle plate (14) and the lower part of the evaporator shell (6) is a liquid secondary refrigerant cavity (17), a plurality of baffle plates (11) are arranged between an upper baffle plate (9) and a lower baffle plate (14) along the height direction of the evaporator shell (6), a plurality of tubulars (10) are arranged in the space of the evaporator shell (6) between the upper baffle plate (9) and the lower baffle plate (14), the tubulars (10) sequentially pass through the upper baffle plate (9), the baffle plates (11) and the lower baffle plate (14) from top to bottom, the upper ends of the tubulars are communicated with a fluidized ice collecting cavity (8), the lower ends of the tubulars are communicated with a liquid secondary refrigerant cavity (17), a spiral stirring shaft (5) is arranged in each tubulation (10), the upper end of the spiral stirring shaft (5) passes through the top supporting plate (7) and is driven by the motor (3) through the transmission device (4), the lower end of the spiral stirring shaft (5) is supported at the lower end of the evaporator shell (6), a liquid-state refrigerating fluid inlet (16) is formed in the evaporator shell (6) of the liquid-state refrigerating fluid cavity (17), a liquid-state ice mixed solution outlet (1) is formed in the evaporator shell (6) of the liquid-state ice collecting cavity (8), a liquid-state refrigerant inlet (13) is formed in the evaporator shell (6) between the baffle plate (11) at the lowest end and the lower baffle plate (14), a gaseous-state refrigerant outlet (18) is formed in the evaporator shell (6) between the upper baffle plate (9) and the baffle plate (11) at the uppermost end, a plurality of flow-breaking holes (12) are formed in the area of half of each baffle plate (11) in the evaporator shell (6), the open-cell area of the adjacent baffle plate (11) is formed in the area of the other half of the evaporator shell, the evaporator shell (11) is in the shape of a spiral stirring shaft (5-to-5 m, the rotation speed of the spiral stirring shaft is 50-5 m, and the rotation speed of the spiral stirring shaft is 50-5 m/m, the number of heads of the screw rod is 6-10.
4. A fluid ice heat pump system according to claim 3, wherein: the outlet (1) of the fluid ice mixed solution stretches into the fluid ice converging cavity (8) and is communicated with the fluid ice converging cavity (8) through the anti-ice blocking horn mouth (2), and the included angle of the anti-ice blocking horn mouth (2) is 20-30 degrees.
5. A fluid ice heat pump system according to claim 4, wherein: the transmission device (4) comprises: the stirring device comprises a driving wheel (19), a driven wheel (22), a driving wheel (21) and a plurality of stirring gears (20), wherein the stirring gears (20) are arranged at the upper end of each spiral stirring shaft (5), a motor (3) drives the driving wheel (19) to rotate, the driving wheel (19) is meshed with the driven wheel (22), the driven wheel (22) and the driving wheel (21) are arranged on the same rotating shaft, the driving wheel (21) is meshed with the stirring gears (20) arranged at the center of an evaporator shell (6), the stirring gears (20) are meshed with the stirring gears (20) adjacent to the stirring gears, and the driving wheel (21) drives the stirring gears (20) in all the evaporator shells (6) to rotate.
6. A fluid ice heat pump system according to claim 5, wherein: the baffle plates (11) are uniformly distributed along the height direction of the evaporator shell (6), and the number of the baffle plates is 5-20.
7. A fluid ice heat pump system according to claim 6, wherein: the bottom end of the spiral stirring shaft (5) is arranged at the lower end of the evaporator shell (6) through a stirrer thrust limiter (15), and the tubes (10) are uniformly distributed in the space of the evaporator shell (6).
8. A fluid ice heat pump system according to claim 1, wherein: the shell (27) is a heat-insulating and waterproof shell.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810471364.6A CN108518779B (en) | 2018-05-17 | 2018-05-17 | Fluid ice heat pump system |
| PCT/CN2019/083382 WO2019218838A1 (en) | 2018-05-17 | 2019-04-19 | Flow-state ice heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810471364.6A CN108518779B (en) | 2018-05-17 | 2018-05-17 | Fluid ice heat pump system |
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| CN108518779A CN108518779A (en) | 2018-09-11 |
| CN108518779B true CN108518779B (en) | 2023-08-29 |
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| CN201810471364.6A Active CN108518779B (en) | 2018-05-17 | 2018-05-17 | Fluid ice heat pump system |
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| WO (1) | WO2019218838A1 (en) |
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| CN108518779B (en) * | 2018-05-17 | 2023-08-29 | 中机十院国际工程有限公司 | Fluid ice heat pump system |
| CN111536728A (en) * | 2020-06-03 | 2020-08-14 | 中国水产科学研究院渔业机械仪器研究所 | Marine automatic transfer fresh-keeping system |
| CN216694153U (en) * | 2021-04-26 | 2022-06-07 | 江苏弗特尔制冷设备有限公司 | Modularized high-efficiency multipurpose refrigeration equipment |
| CN114920317A (en) * | 2022-05-07 | 2022-08-19 | 北京中矿博能节能科技有限公司 | Freezing crystallization solid-liquid separation water treatment system |
| CN115143306A (en) * | 2022-05-20 | 2022-10-04 | 美的集团(上海)有限公司 | Twelve-way valve, thermal management system and vehicle |
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| WO2019218838A1 (en) | 2019-11-21 |
| CN108518779A (en) | 2018-09-11 |
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