CN108507083B - Ice-storage type heat source tower heat pump system device and method - Google Patents
Ice-storage type heat source tower heat pump system device and method Download PDFInfo
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- CN108507083B CN108507083B CN201810178670.0A CN201810178670A CN108507083B CN 108507083 B CN108507083 B CN 108507083B CN 201810178670 A CN201810178670 A CN 201810178670A CN 108507083 B CN108507083 B CN 108507083B
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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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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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
- F24F5/0014—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 absorption or desorption
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides an ice storage type heat source tower heat pump system device, which comprises: the system comprises a heat source tower, a heat pump unit, an ice crystal blocker, a crystal accelerator, an ice storage pool, a solution pool, an ice crystal filter, a preheater, an ice melting pump, a circulating pump, an ice melting heat exchanger, a hot water inlet valve, a cooling water inlet valve, a solution inlet valve, an ice storage pool liquid inlet valve, a cold water outlet valve, a cold water inlet valve, a cold water bypass valve, an ice making water inlet valve, an ice melting valve, a circulating pump regulating valve, a cooling water outlet valve, a hot water outlet valve, a heat source tower circulating pump, a solution pool liquid inlet valve and an antifreeze liquid inlet; the invention also provides four using methods of the ice storage type heat source tower heat pump system: a general refrigeration mode, an ice storage mode (ice making and ice melting combined operation), an ice storage mode (single ice melting mode) and a winter heating mode. The invention uses the supercooling method to freeze and regenerate the antifreeze solution, and the system has rich functions and simple type.
Description
Technical Field
The invention relates to the technical field of air conditioning refrigeration, in particular to an ice storage type heat source tower heat pump system device and method.
Background
The heat source tower heat pump compares in air source heat pump and can solve the problem of frosting under the operating mode winter, and can be under the condition of not shutting down continuous operation, and its heating efficiency is slightly higher than air source heat pump, and under the operating mode summer, the heat source tower converts cooling tower mode operation back into, and whole heat pump system becomes a water cooling unit, and its refrigeration efficiency is higher than air source heat pump greatly more, has very big energy-conserving advantage.
The main problem of the heat source tower heat pump at present is the regeneration of antifreeze, and the antifreeze regeneration technology is also one of the core technologies of the heat source tower heat pump system. The technical route for regenerating antifreeze can be generally divided into three categories: membrane regeneration, thermal evaporation regeneration and freezing regeneration. The freezing regeneration technology is used for freezing water in a solution into ice to be discharged, and the ice dissolution heat is 1/7-1/8 of water evaporation latent heat, so that the freezing regeneration technology is more energy-saving than thermal evaporation regeneration technology and is widely applied to the food industry.
The patent application with application number 201510030075.1 provides a heat pump system based on freeze regeneration, will prevent frostbite solution to spray on the heat-transfer surface after cooling to the freezing point, with freezing the solution and separating out, the rethread separator separates out ice from ice water mixture, obtains the concentrated solution after the regeneration, and this method needs to add an independent refrigeration plant in addition outside heat pump set, and the cost is higher, does not solve the adnexed deicing problem of ice layer on the heat-transfer surface moreover. The patent application No. 201610603582.1 proposes a freezing regeneration air source heat pump system, which does not need additional refrigeration system, the system is simple, but the regeneration principle is gradual freezing regeneration, the area of the regeneration heat exchanger is huge, and the freezing regeneration heat exchanger needs to be frequently switched between freezing and de-icing modes, and in addition, the problem of solute entrainment of ice layers is not considered, and serious solute loss is easily generated in the actual operation. The patent application No. 201610703659.2 proposes a vacuum evaporation-based freezing regeneration heat source tower system, which needs a separate vacuum freezing concentration system to complete the regeneration of the anti-freezing solution, and the system has high ice crystal generation rate, but is easy to generate the secondary steam liquid carrying problem and the vacuum maintaining problem, and the system is also complicated.
It can be seen that the existing refrigeration regeneration heat source tower heat pumps have respective disadvantages, and it is necessary to improve the disadvantages and combine the advantages to improve the technical and economic performance of the heat source tower heat pump system.
Disclosure of Invention
The invention aims to provide a high-efficiency ice-storage type heat source tower heat pump system device and a high-efficiency ice-storage type heat source tower heat pump method.
In order to solve the above technical problems, the present invention provides an ice storage type heat source tower heat pump system device: the system comprises a heat source tower, a heat pump unit, an ice crystal blocker, a crystal accelerator, an ice storage pool, a solution pool, an ice crystal filter, a preheater, an ice melting pump, a circulating pump, an ice melting heat exchanger, a hot water inlet valve, a cooling water inlet valve, a solution inlet valve, an ice storage pool liquid inlet valve, a cold water outlet valve, a cold water inlet valve, a cold water bypass valve, an ice making water inlet valve, an ice melting valve, a circulating pump regulating valve, a cooling water outlet valve, a hot water outlet valve, a heat source tower circulating pump, a solution pool liquid inlet valve and an antifreeze liquid inlet;
an evaporation channel and a condensation channel are arranged in the heat pump unit; the heat pump unit is provided with a heat pump evaporator liquid inlet and a heat pump evaporator liquid outlet which are communicated with the evaporation channel; the heat pump unit is provided with a heat pump condenser liquid inlet and a heat pump condenser liquid outlet which are communicated with the condensing channel;
the ice storage pool is provided with an ice slurry inlet of the ice storage pool, an ice return inlet of the ice storage pool and an ice storage pool water outlet;
a solution tank liquid inlet and a solution tank liquid outlet are formed in the solution tank;
a liquid outlet of a heat source tower of the heat source tower is connected with a circulating pump of the heat source tower and then divided into two paths, one path is connected with a solution water inlet valve and then connected with a liquid inlet of a heat pump evaporator, and the other path is connected with a cooling water inlet valve and then connected with a liquid inlet of a heat pump condenser;
the liquid outlet of the heat pump evaporator is divided into two paths, one path is sequentially connected with the ice crystal blocker and the crystal accelerator, and the other path is connected with the cold water outlet valve and then connected with the cold water outlet;
the outlet of the crystal growth promoter is divided into two paths, one path is connected with the liquid inlet of the solution tank after passing through the liquid inlet valve of the solution tank, and the other path is connected with the ice slurry inlet of the ice storage tank after passing through the liquid inlet valve of the ice storage tank;
the water outlet of the ice storage pool is connected with the liquid outlet of the solution pool and then divided into two paths, one path is sequentially connected with a circulating pump regulating valve, a circulating pump and an ice crystal filter, and the other path is sequentially connected with an ice melting valve, an ice melting pump and a heat absorption channel of an ice melting heat exchanger and then connected with a water return inlet of the ice storage pool;
the outlet of the ice crystal filter is divided into two paths, one path is connected with an anti-freezing solution water inlet valve and then is connected with a liquid inlet of the heat source tower, and the other path is sequentially connected with an ice making water inlet valve and a preheater and then is connected with a liquid inlet of the heat pump evaporator;
the hot water inlet is connected with the hot water inlet valve and then connected with the liquid inlet of the heat pump condenser, the liquid outlet of the heat pump condenser is divided into two paths, one path is connected with the hot water outlet valve and then connected with the hot water outlet, and the other path is connected with the cooling water outlet valve and then connected with the liquid inlet of the heat source tower;
the cold water inlet is divided into two paths, one path is connected with the cold water inlet valve and connected with the liquid inlet of the heat pump evaporator, and the other path is connected with the cold water outlet after being sequentially connected with the cold water bypass valve and the heat release channel of the ice melting heat exchanger.
As an improvement of the ice storage type heat source tower heat pump system device of the invention: the ice storage type heat source tower heat pump system device also comprises an ice crystal separator;
the solution tank is provided with a solution tank ice crystal outlet and a solution tank concentrated solution inlet;
the ice crystal separator is provided with an ice crystal separator liquid outlet, an ice crystal separator ice outlet and an ice crystal separator inlet;
the ice crystal outlet of the solution pool is connected with the inlet of an ice crystal separator, and the liquid outlet of the ice crystal separator is connected with the concentrated solution inlet of the solution pool.
As a further improvement of the ice storage type heat source tower heat pump system device of the invention: the ice storage type heat source tower heat pump system device also comprises an ice crystal conveyor;
an ice crystal outlet of the solution pool is connected with an ice crystal conveyor and then is connected with an inlet of an ice crystal separator.
The invention also provides a use method of the ice storage type heat source tower heat pump system, which comprises the following steps:
cooling water in the heat source tower flows out from a liquid outlet of the heat source tower, is pressurized by a circulating pump of the heat source tower, enters a condensation pipeline in the heat pump unit from a liquid inlet of a condenser of the heat pump unit from a cooling water inlet valve, and is heated after absorbing condensation heat in the condenser in the heat pump unit;
then the cooling water flows out from a liquid outlet of the heat pump condenser, enters a liquid inlet of the heat source tower after passing through a cooling water outlet valve, is subjected to heat and mass exchange with outdoor air in the heat source tower, is reduced in temperature again, and flows out from the liquid outlet of the heat source tower;
external cold water backwater enters from a cold water inlet, enters an evaporation pipeline in the heat pump unit from a liquid inlet of the heat pump evaporator through a cold water inlet valve, releases sensible heat to an evaporator in the heat pump unit, reduces the temperature to form external cold water supply, flows out from a liquid outlet of the heat pump evaporator, and flows out from a cold water outlet through a cold water outlet valve.
The invention also provides a use method of the ice storage type heat source tower heat pump system, which comprises the following steps:
cooling water in the heat source tower flows out from a liquid outlet of the heat source tower, is pressurized by a circulating pump of the heat source tower, enters a condensation pipeline in the heat pump unit from a liquid inlet of a condenser of the heat pump unit from a cooling water inlet valve, and is heated after absorbing condensation heat in the condenser in the heat pump unit;
then the cooling water flows out from a liquid outlet of the heat pump condenser, enters a liquid inlet of the heat source tower after passing through a cooling water outlet valve, is subjected to heat and mass exchange with outdoor air in the heat source tower, is reduced in temperature again, and flows out from the liquid outlet of the heat source tower;
external cold water backwater enters the heat release channel of the ice melting heat exchanger through the cold water bypass valve after entering the cold water inlet, and the temperature of the external cold water backwater is reduced after the heat of ice slurry water in the heat absorption channel of the ice melting heat exchanger is released, so that the external cold water supply is formed and flows out through the cold water outlet;
the ice slurry water in the ice storage tank flows out from the water outlet of the ice storage tank and is divided into two paths, one path of the ice slurry water sequentially passes through the ice melting valve and the ice melting pump and then enters the heat absorption channel of the ice melting heat exchanger, after the sensible heat released by the external cold water backwater in the heat release channel of the ice melting heat exchanger is absorbed, the ice slurry in the ice slurry water is melted to release melting heat, the temperature of the ice slurry water is increased, then the ice slurry water enters the ice storage tank through the backwater inlet of the ice storage tank, and after the heat is released to the ice slurry water by the;
the other path of ice slurry water flowing out of the water outlet of the ice storage tank sequentially passes through a circulating pump regulating valve and a circulating pump and then enters an ice crystal filter, part of ice crystals are filtered in the ice crystal filter to become ice water, the ice water enters a preheater after passing through an ice making water inlet valve, and the preheater heats the ice water to be above the freezing point to melt the rest part of ice crystals in the ice water;
and then the ice water enters a liquid inlet of the heat pump evaporator, the temperature is reduced to be supercooled water after sensible heat is released to an evaporator in the heat pump unit, the supercooled water flows out of a liquid outlet of the heat pump evaporator and flows into the crystal promotion device after passing through the ice crystal blocker, after the supercooling in the crystal promotion device is relieved, part of the cold water is changed into ice crystals, the temperature rises to the freezing point again, the supercooled water becomes ice slurry water, and the ice slurry water enters the ice storage tank for accumulation after passing through a liquid inlet valve of the ice storage tank and an ice slurry inlet of the ice storage tank.
The invention also provides a use method of the ice storage type heat source tower heat pump system, which comprises the following steps:
external cold water backwater enters the heat release channel of the ice melting heat exchanger through the cold water bypass valve after entering the cold water inlet, and the temperature of the external cold water backwater is reduced after the heat of ice slurry water in the heat absorption channel of the ice melting heat exchanger is released, so that the external cold water supply is formed and flows out through the cold water outlet;
the ice slurry water in the ice storage tank flows out from the water outlet of the ice storage tank and then is divided into two paths, one path of the ice slurry water sequentially passes through the ice melting valve and the ice melting pump and then enters the heat absorption channel of the ice melting heat exchanger, after sensible heat released by external cold water backwater in the heat release channel of the ice melting heat exchanger is absorbed, the ice slurry in the ice slurry water is melted to release melting heat, the temperature of the ice slurry water is increased, then the ice slurry water enters the ice storage tank through the backwater inlet of the ice storage tank, and after the heat is released to the ice slurry water by the ice.
The invention also provides a use method of the ice storage type heat source tower heat pump system, which comprises the following steps:
the method comprises the following steps that after flowing out from a liquid outlet of a heat source tower, antifreeze in the heat source tower sequentially passes through a heat source tower circulating pump and a solution water inlet valve and then enters an evaporation pipeline of a heat pump unit from a liquid inlet of a heat pump evaporator, sensible heat is released to an evaporator in the heat pump unit, the temperature is reduced to be supercooled liquid, the supercooled liquid flows out from a liquid outlet of the heat pump evaporator, flows into a crystal accelerator after passing through an ice crystal blocker, after supercooling is relieved in the crystal accelerator, part of water is separated out to be small ice crystals, the temperature rises to the freezing point of the antifreeze, the supercooled liquid becomes ice slurry, the ice slurry passes through a liquid inlet valve of a solution tank and then enters the solution tank from a liquid inlet of the solution tank to be accumulated, and the small ice;
ice crystals containing solution in the solution pool flow out of an ice crystal outlet of the solution pool and are conveyed into an ice crystal separator by an ice crystal conveyor, the ice crystals containing the solution are separated into ice crystals and concentrated anti-freezing solution, the ice crystals are discharged from an ice outlet of the ice crystal separator, and the concentrated anti-freezing solution flows out of a liquid outlet of the ice crystal separator and returns into the solution pool again through a concentrated solution inlet flowing into the solution pool;
the concentrated antifreeze solution in the solution pool flows out from a liquid outlet of the solution pool, sequentially passes through a circulating pump regulating valve and a circulating pump and then enters an ice crystal filter, tiny ice crystals carried in the concentrated antifreeze solution are filtered and separated by the ice crystal filter, then the concentrated antifreeze solution enters a heat source tower from a liquid inlet of the heat source tower through an antifreeze solution inlet valve, after the concentrated antifreeze solution is subjected to heat and mass exchange with outdoor air in the heat source tower, the temperature is increased, and after water in the air is absorbed, the concentration is slightly reduced to become antifreeze solution, and then the antifreeze solution flows out from a liquid outlet of the heat source tower;
external hot water backwater enters from the hot water inlet, enters the condensation pipeline of the heat pump unit from the liquid inlet of the heat pump condenser through the hot water inlet valve, absorbs condensation heat of the condenser in the heat pump unit, then the temperature is increased to form external hot water for supplying, then the external hot water flows out from the liquid outlet of the heat pump condenser, passes through the hot water outlet valve and then flows out from the hot water outlet.
The ice storage type heat source tower heat pump system device and the method have the technical advantages that:
the regenerated anti-freezing solution is frozen by using a supercooling method, so that the heat transfer coefficient is large, the ice yield is high, the required heat transfer area is small, and the solute entrainment is small;
the evaporator of the heat pump unit is used for completing double tasks of absorbing heat and supercooling the anti-freezing solution, and a special freezing and regenerating refrigeration system is not needed;
in summer, the heat pump unit can operate according to the ice storage mode;
when the refrigeration regeneration is carried out by utilizing a supercooling method, the heat absorption capacity of a heat source tower can be reduced;
the freezing point of the system antifreeze is higher, so that the moisture absorption amount of the ambient air can be reduced;
the system has rich functions and simple type.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an ice-storage heat source tower heat pump system device according to the present invention.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
Embodiment 1, an ice storage type heat source tower heat pump system apparatus, as shown in fig. 1, includes a heat source tower 1, a heat pump unit 2, an ice crystal blocker 3, a crystal actuator 4, an ice storage tank 5, a solution tank 6, an ice crystal filter 24, a preheater 25, an ice crystal conveyor 7, an ice crystal separator 8, an ice melting pump 9, a circulation pump 10, an ice melting heat exchanger 11, a hot water inlet valve 12, a cooling water inlet valve 13, a solution inlet valve 14, an ice storage tank inlet valve 15, a cold water outlet valve 16, a cold water inlet valve 17, a cold water bypass valve 18, an ice making inlet valve 19, an ice melting valve 20, a circulation pump regulating valve 21, a cooling water outlet valve 22 and a hot water outlet valve 23, a heat source tower circulation pump 26, a solution tank inlet valve 27, and an antifreeze inlet.
The heat pump unit 2 is provided with a heat pump evaporator liquid inlet 211 and a heat pump evaporator liquid outlet 212 which are communicated with the evaporation channel of the heat pump unit 2, and the heat pump unit 2 is provided with a heat pump condenser liquid inlet 213 and a heat pump condenser liquid outlet 214 which are communicated with the condensation channel of the heat pump unit 2.
The ice storage pool 5 is provided with an ice storage pool ice slurry inlet 51, an ice storage pool water return inlet 52 and an ice storage pool water outlet 53.
The solution tank 6 is provided with a solution tank liquid inlet 61, a solution tank liquid outlet 62, a solution tank ice crystal outlet 63 and a solution tank concentrated solution inlet 64.
The liquid outlet 112 of the heat source tower 1 is connected with the heat source tower circulating pump 26 and then divided into two paths, one path is connected with the solution inlet valve 14 and then connected with the liquid inlet 211 of the heat pump evaporator, and the other path is connected with the cooling water inlet valve 13 and then connected with the liquid inlet 213 of the heat pump condenser.
The liquid outlet 212 of the heat pump evaporator is divided into two paths, one path is sequentially connected with the ice crystal blocker 3 and the crystal accelerator 4, and the other path is connected with the cold water outlet valve 16 and then connected with the cold water outlet 161.
The outlet of the crystal growth promoting device 4 is divided into two paths, one path is connected with the solution tank liquid inlet 61 of the solution tank 6 after passing through the solution tank liquid inlet valve 27, and the other path is connected with the ice storage tank ice slurry inlet 51 of the ice storage tank 5 after passing through the ice storage tank liquid inlet valve 15.
The water outlet 53 of the ice storage tank 5 is connected with the liquid outlet 62 of the solution tank 6 and then divided into two paths, one path is sequentially connected with the circulating pump regulating valve 21, the circulating pump 10 and the ice crystal filter 24, and the other path is sequentially connected with the ice melting valve 20, the ice melting pump 9 and the heat absorption channel of the ice melting heat exchanger 11 and then connected with the return water inlet 52 of the ice storage tank.
The outlet of the ice crystal filter 24 is divided into two paths, one path is connected with the antifreeze solution inlet valve 28 and then connected with the liquid inlet 111 of the heat source tower, and the other path is connected with the ice making inlet valve 19 and the preheater 25 in sequence and then connected with the liquid inlet 211 of the heat pump evaporator.
The hot water inlet 121 is connected with the hot water inlet valve 12 and then connected with the liquid inlet 213 of the heat pump condenser, the liquid outlet 214 of the heat pump condenser is divided into two paths, one path is connected with the hot water outlet valve 23 and then connected with the hot water outlet 231, and the other path is connected with the cooling water outlet valve 22 and then connected with the liquid inlet 111 of the heat source tower.
The cold water inlet 171 is divided into two paths, one path is connected with the cold water inlet valve 17 and connected with the liquid inlet 211 of the heat pump evaporator, and the other path is connected with the cold water outlet 161 after being sequentially connected with the cold water bypass valve 18 and the heat release channel of the ice melting heat exchanger 11.
The ice crystal outlet 63 of the solution pool 6 is connected with the ice crystal conveyor 7 and then connected with the inlet 83 of the ice crystal separator, the liquid outlet 81 of the ice crystal separator is connected with the concentrated solution inlet 64 of the solution pool, and the ice crystal separator 8 is also provided with an ice outlet 82 of the ice crystal separator.
The operation modes of the ice storage type heat source tower heat pump system method are divided into a winter heating mode and a summer refrigerating mode, and the summer refrigerating mode is divided into a general refrigerating mode and an ice storage mode. The ice storage mode is divided into two modes, one mode is a combined operation mode of ice making and ice melting, and the other mode is a single ice melting mode. The invention has four modes in total: a general refrigeration mode, an ice storage mode (ice making and ice melting combined operation), an ice storage mode (single ice melting mode) and a winter heating mode.
General cooling mode:
and opening a cooling water inlet valve 13, a cooling water outlet valve 16, a cooling water inlet valve 17, a cooling water outlet valve 22, a heat source tower circulating pump 26, a heat source tower 1 and a heat pump unit 2. The remaining valves and equipment are closed.
After flowing out from the heat source tower liquid outlet 112, the cooling water is pressurized by the heat source tower circulating pump 26, enters a condensation pipeline in the heat pump unit 2 from the cooling water inlet valve 13 from the heat pump condenser liquid inlet 213, absorbs the condensation heat released by the high-temperature high-pressure gaseous working medium in the condenser in the heat pump unit 2, and then the temperature is increased;
then flows out from the liquid outlet 214 of the heat pump condenser, passes through the cooling water outlet valve 22, enters the liquid inlet 111 of the heat source tower, and the cooling water exchanges heat and mass with the outdoor air in the heat source tower 1, then the temperature is reduced again, and flows out from the liquid outlet 112 of the heat source tower.
After entering from the cold water inlet 171, the external cold water return water enters the evaporation pipeline in the heat pump unit 2 from the liquid inlet 211 of the heat pump evaporator through the cold water inlet valve 17, releases sensible heat to the low-temperature low-pressure liquid working medium in the evaporator in the heat pump unit 2, reduces the temperature to form external cold water supply, flows out from the liquid outlet 212 of the heat pump evaporator, and enters the cold water outlet 161 through the cold water outlet valve 16.
Ice cold storage mode (Ice making and melting combined operation mode)
Opening a heat source tower 1, a heat pump unit 2, a cold water bypass valve 18, an ice melting heat exchanger 11, an ice crystal blocker 3, a crystal accelerator 4, an ice storage pool 5, an ice crystal filter 24, an ice melting pump 9, a preheater 25, a circulating pump 10, a cooling water inlet valve 13, an ice storage pool liquid inlet valve 15, an ice making water inlet valve 19, an ice melting valve 20, a circulating pump adjusting valve 21, a cooling water outlet valve 22, a heat source tower circulating pump 26 and an antifreeze liquid inlet valve 28. The remaining valves and equipment are closed.
After flowing out from the heat source tower liquid outlet 112, the cooling water is pressurized by the heat source tower circulating pump 26, enters a condensation pipeline in the heat pump unit 2 from the cooling water inlet valve 13 from the heat pump condenser liquid inlet 213, absorbs the condensation heat released by the high-temperature high-pressure gaseous working medium in the condenser in the heat pump unit 2, and then the temperature is increased;
then flows out from the liquid outlet 214 of the heat pump condenser, passes through the cooling water outlet valve 22, enters the liquid inlet 111 of the heat source tower, and the cooling water exchanges heat and mass with the outdoor air in the heat source tower 1, then the temperature is reduced again, and flows out from the liquid outlet 112 of the heat source tower.
External cold water backwater enters the heat release channel of the ice melting heat exchanger 11 through the cold water bypass valve 18 after entering the cold water inlet 171, releases heat to ice slurry water in the heat absorption channel of the ice melting heat exchanger 11, reduces the temperature, and then passes through the cold water outlet 161 to become external cold water supply.
The ice slurry water in the ice storage pool 5 flows out from the ice storage pool water outlet 53 and is divided into two paths, one path of the ice slurry water sequentially passes through the ice melting valve 20 and the ice melting pump 9 and then enters the heat absorption channel of the ice melting heat exchanger 11, after sensible heat released by external cold water backwater in the heat release channel is absorbed, the ice slurry is melted to release melting heat, the temperature of the ice slurry water is slightly increased and then enters the ice storage pool backwater inlet 52, and after the ice storage pool 5 releases heat to the ice slurry water, the temperature is reduced again.
The other path of ice slurry flowing out from the water outlet 53 of the ice storage tank sequentially passes through the circulating pump regulating valve 21 and the circulating pump 10 and then enters the ice crystal filter 24, most of ice crystals are filtered in the ice crystal filter 24 to form ice water, the ice water enters the preheater 25 through the ice making water inlet valve 19, the preheater 25 slightly heats the ice water to above the freezing point to melt micro ice crystals (ice crystals left after being filtered by the ice crystal filter 24) in the ice water, then the ice water enters the liquid inlet 211 of the heat pump evaporator, after sensible heat is released to a low-temperature low-pressure liquid working medium in the evaporator in the heat pump unit 2, the temperature is reduced to be supercooled water, the supercooled water flows out from a liquid outlet 212 of the heat pump evaporator, flows into the crystal promotion device 4 after passing through the ice crystal blocker 3, after the supercooling is released in the crystal accelerator 4, a part of supercooled water is rapidly changed into ice crystals, the supercooled water becomes ice slurry, meanwhile, the temperature rises to the freezing point again, and the ice slurry enters the ice storage pool 5 to be accumulated after passing through the ice storage pool liquid inlet valve 15 and the ice storage pool ice slurry inlet 51.
Ice storage mode (Single ice melting mode)
And opening a cold water bypass valve 18, the ice melting heat exchanger 11, the ice storage pool 5, the ice melting valve 20, the ice melting pump 9, and closing other valves and equipment.
After entering from the cold water inlet 171, the external cold water backwater enters the heat release channel of the ice melting heat exchanger 11 through the cold water bypass valve 18, releases heat to the ice slurry water in the heat absorption channel of the ice melting heat exchanger 11, then the temperature is reduced, the external cold water supply is formed, and the external cold water supply flows out from the cold water outlet 161.
The ice slurry water in the ice storage pool 5 flows out from the water outlet 53 of the ice storage pool, sequentially passes through the ice melting valve 20 and the ice melting pump 9, enters the heat absorption channel of the ice melting heat exchanger 11, absorbs sensible heat released by external cold water backwater in the heat release channel of the ice melting heat exchanger 11, melts the ice slurry in the ice slurry water to release melting heat, the temperature of the ice slurry water is slightly increased, then the ice slurry water enters the ice storage pool 5 through the water return inlet 52 of the ice storage pool, and the temperature of the ice slurry water is reduced again after the ice slurry water releases heat to the ice slurry water in the ice storage pool 5. Since the ice bank 5 contains a large amount of ice, the temperature thereof can be maintained at 0 degrees, and the temperature of the ice bank 5 does not change unless the ice is completely melted.
Winter heating mode:
opening a heat source tower 1, a heat pump unit 2, an ice crystal blocker 3, a crystal accelerator 4, a solution tank 6, an ice crystal conveyor 7, an ice crystal separator solution tank 8, a circulating pump 10, a hot water inlet valve 12, a solution inlet valve 14, a circulating pump regulating valve 21, a hot water outlet valve 23, an ice crystal filter 24, a heat source tower circulating pump 26, a liquid inlet valve 27 and an antifreeze liquid inlet valve 28, and closing the rest valves and equipment.
The anti-freezing liquid in the heat source tower 1 flows out from a heat source tower liquid outlet 112, sequentially passes through a heat source tower circulating pump 26 and a solution water inlet valve 14, then enters an evaporation pipeline of the heat pump unit 2 from a heat pump evaporator liquid inlet 211, releases sensible heat to low-temperature and low-pressure liquid working media in an evaporator in the heat pump unit 2, reduces the temperature to form supercooled liquid, flows out from a heat pump evaporator liquid outlet 212, flows into the crystal promotion device 4 after passing through the ice crystal blocker 3, and the ice crystal blocker 3 can prevent the evaporator from freezing due to reverse growth of ice crystals after the supercooled water is relieved. After supercooling is relieved in the crystal accelerator 4, part of water is separated out and quickly becomes small ice crystals, supercooled liquid becomes ice slurry, the temperature is raised to the freezing point of the antifreezing liquid, the ice slurry passes through the liquid inlet valve 27 of the solution tank and then enters the solution tank 6 from the liquid inlet 61 of the solution tank for accumulation, the small ice crystals in the ice slurry of the solution tank 6 gradually grow into large ice crystals and float on the surface, and meanwhile, the dissolving quality contained in the ice crystals is also reduced.
The ice crystals containing the solution in the solution pool 6 flow out from the ice crystal outlet 63 of the solution pool and are conveyed into the ice crystal separator 8 by the ice crystal conveyor 7, the concentrated antifreeze solution contained in the ice crystals in the ice crystal separator 8 is greatly reduced (because the ice crystals floating on the surface in the ice storage pool 5 are actually mixed with a lot of solution and are impure, the ice crystal separator 8 is used for separating the solution contained in the ice crystals, so that the purity of the ice crystals is higher, and then the pure ice crystals are discharged, thereby reducing the solute loss of the antifreeze solution, otherwise, a lot of antifreeze solution solute is discharged along with the discharge of the ice crystals with low purity), obtaining the ice crystals with higher purity (pure ice crystals), the ice crystals with higher purity are discharged from the ice crystal separator outlet 82, the separated concentrated antifreeze solution flows out through the ice crystal separator outlet 81 and returns to the solution pool 6 through the solution inlet 64, the antifreeze in the solution tank 6 becomes a concentrated antifreeze solution.
The concentrated antifreeze solution in the solution tank 6 flows out from the solution tank liquid outlet 62, sequentially passes through the circulating pump regulating valve 21 and the circulating pump 10, enters the ice crystal filter 24, tiny ice crystals carried in the concentrated antifreeze solution are filtered and separated by the ice crystal filter 24, then the concentrated solution enters the heat source tower 1 through the heat source tower liquid inlet 111 through the antifreeze solution inlet valve 28, and after the concentrated antifreeze solution exchanges heat and mass with outdoor air in the heat source tower 1, the temperature rises, and after absorbing moisture in the air, the concentration is slightly reduced to become antifreeze solution, and then the antifreeze solution flows out from the heat source tower liquid outlet 112.
After entering from the hot water inlet 121, the external hot return water enters the condensation pipeline of the heat pump unit 2 from the liquid inlet 213 of the heat pump condenser through the hot water inlet valve 12, absorbs the condensation heat released by the high-temperature high-pressure gaseous working medium in the condenser in the heat pump unit 2, then the temperature of the external hot return water is increased to become external hot water for water supply, and then the external hot return water flows out from the liquid outlet 214 of the heat pump condenser and flows out from the hot water outlet 231 after passing through the hot water outlet valve 23.
The calculated parameters for example 1 are shown in table 1 (heat rejection for 1kw condensation). The design conditions are as follows: the system operates in a winter heating mode, the ambient air temperature is 5 ℃, the relative humidity is 80%, the maximum supercooling degree during freezing regeneration is 2 ℃, the evaporation temperature is-14 ℃, the condensation temperature is 48 ℃, the heat pump heating COP is 3, the freezing point of the anti-freezing solution is-8 ℃, the concentration of the anti-freezing solution is 12% (taking a calcium chloride solution as an example), the solute drift loss is 0.02%, and the calculation result shows that the water absorption capacity of the system is 170kg/h, the ice discharge capacity is 384 kg/h, the ice crystal solute loss is 1.7 kg/h, and the heat absorption capacity of the heat source tower 1 during freezing regeneration is 400 kw. When a traditional progressive freezing regeneration system is adopted (see table 1), the freezing point of the required antifreezing solution is-20 ℃, the concentration of the antifreezing solution is 20%, the water absorption capacity of the system from air is 192kg/h, the solute loss of ice crystals is 1.92 kg/h, the heat absorption capacity of the heat source tower 1 during freezing regeneration is 688kw, and the extra power consumption of freezing regeneration and deicing is 3.93 kw. Therefore, the invention has the advantages of small water absorption capacity, small ice crystal solute loss, small heat absorption burden of the heat source tower 1 during freezing regeneration, greatly improved technical indexes compared with gradual freezing regeneration, no need of additionally arranging a freezing regeneration refrigerating unit, no need of complicated ice making and ice removing conversion, no extra energy consumption for freezing regeneration, capability of running in an ice cold storage mode in a summer running mode, capability of fully utilizing low-price electric power for cold storage at night, improvement of equipment utilization rate and technical economy of the system, simple system type and effective realization of the original purpose of the invention.
Table 1 implementation of thermodynamic calculation results for example 1 (heat rejection for 1kw condensation)
[00229] In the above embodiment, the design parameters of the system can be reasonably determined by comprehensively considering the specific use conditions and requirements, the technical and economic performance and other factors, so as to take the applicability and the economic performance of the system into consideration.
Finally, it is also noted that the above-mentioned lists merely illustrate a few specific embodiments of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (3)
1. The use method of the ice storage type heat source tower heat pump system is characterized in that: the ice storage type heat source tower heat pump system device comprises a heat source tower (1), a heat pump unit (2), an ice crystal blocker (3), a crystal promotion device (4), an ice storage tank (5), a solution tank (6), an ice crystal filter (24), a preheater (25), an ice melting pump (9), a circulating pump (10), an ice melting heat exchanger (11), a hot water inlet valve (12), a cooling water inlet valve (13), a solution inlet valve (14), an ice storage tank inlet valve (15), a cold water outlet valve (16), a cold water inlet valve (17), a cold water bypass valve (18), an ice making inlet valve (19), an ice melting valve (20), a circulating pump regulating valve (21), a cooling water outlet valve (22) and a hot water outlet valve (23), a heat source tower circulating pump (26), a solution tank inlet valve (27) and an antifreeze inlet valve (28);
an evaporation channel and a condensation channel are arranged in the heat pump unit (2); a heat pump evaporator liquid inlet (211) and a heat pump evaporator liquid outlet (212) which are communicated with the evaporation channel are arranged on the heat pump unit (2); a heat pump condenser liquid inlet (213) and a heat pump condenser liquid outlet (214) which are communicated with the condensing channel are arranged on the heat pump unit (2);
the ice storage pool (5) is provided with an ice storage pool ice slurry inlet (51), an ice storage pool water return inlet (52) and an ice storage pool water outlet (53);
a solution tank liquid inlet (61) and a solution tank liquid outlet (62) are arranged on the solution tank (6);
a liquid outlet (112) of the heat source tower (1) is connected with a heat source tower circulating pump (26) and then divided into two paths, one path is connected with a solution water inlet valve (14) and then connected with a liquid inlet (211) of a heat pump evaporator, and the other path is connected with a cooling water inlet valve (13) and then connected with a liquid inlet (213) of a heat pump condenser;
the liquid outlet (212) of the heat pump evaporator is divided into two paths, one path is sequentially connected with the ice crystal blocker (3) and the crystal accelerator (4), and the other path is connected with a cold water outlet valve (16) and then connected with a cold water outlet (161);
the outlet of the crystal promotion device (4) is divided into two paths, one path is connected with the liquid inlet (61) of the solution tank (6) after passing through the liquid inlet valve (27) of the solution tank, and the other path is connected with the ice slurry inlet (51) of the ice storage tank (5) after passing through the liquid inlet valve (15) of the ice storage tank;
an ice storage tank water outlet (53) of the ice storage tank (5) is connected with a solution tank liquid outlet (62) of the solution tank (6) and then divided into two paths, one path is sequentially connected with a circulating pump regulating valve (21), a circulating pump (10) and an ice crystal filter (24), and the other path is sequentially connected with an ice melting valve (20), an ice melting pump (9) and a heat absorption channel of an ice melting heat exchanger (11) and then connected with an ice storage tank water return inlet (52);
the outlet of the ice crystal filter (24) is divided into two paths, one path is connected with an antifreeze liquid inlet valve (28) and then is connected with a liquid inlet (111) of a heat source tower, and the other path is sequentially connected with an ice making inlet valve (19) and a preheater (25) and then is connected with a liquid inlet (211) of a heat pump evaporator;
a hot water inlet (121) is connected with a hot water inlet valve (12) and then is connected with a liquid inlet (213) of a heat pump condenser, a liquid outlet (214) of the heat pump condenser is divided into two paths, one path is connected with a hot water outlet valve (23) and then is connected with a hot water outlet (231), and the other path is connected with a cooling water outlet valve (22) and then is connected with a liquid inlet (111) of a heat source tower;
the cold water inlet (171) is divided into two paths, one path is connected with the cold water inlet valve (17) and is connected with the liquid inlet (211) of the heat pump evaporator, and the other path is connected with the cold water outlet (161) after being sequentially connected with the cold water bypass valve (18) and the heat release channel of the ice melting heat exchanger (11);
the use method of the ice-storage type heat source tower heat pump system by using the ice-storage type heat source tower heat pump system device comprises the following steps:
after flowing out from a heat source tower liquid outlet (112), cooling water in the heat source tower (1) is pressurized through a heat source tower circulating pump (26), enters a condensation pipeline in the heat pump unit (2) from a heat pump condenser liquid inlet (213) through a cooling water inlet valve (13), and is heated to be high after absorbing condensation heat in a condenser in the heat pump unit (2);
then flows out from a liquid outlet (214) of the heat pump condenser, enters a liquid inlet (111) of the heat source tower after passing through a cooling water outlet valve (22), and the temperature of the cooling water is reduced again after the cooling water exchanges heat and mass with outdoor air in the heat source tower (1) and flows out from a liquid outlet (112) of the heat source tower;
external cold water backwater enters the heat release channel of the ice melting heat exchanger (11) through the cold water bypass valve (18) after entering from the cold water inlet (171), and the temperature is reduced after heat is released to ice slurry water in the heat absorption channel of the ice melting heat exchanger (11) so as to become external cold water supply, and the external cold water supply flows out through the cold water outlet (161);
ice slurry water in the ice storage tank (5) flows out from an ice storage tank water outlet (53) and then is divided into two paths, one path of the ice slurry water sequentially passes through an ice melting valve (20) and an ice melting pump (9) and then enters a heat absorption channel of an ice melting heat exchanger (11), after sensible heat released by external cold water backwater in a heat release channel of the ice melting heat exchanger (11) is absorbed, the ice slurry in the ice slurry water is melted to release melting heat, the temperature of the ice slurry water is increased, then the ice slurry water enters the ice storage tank (5) through an ice storage tank backwater inlet (52), and after the ice storage tank (5) releases heat to the ice slurry water, the temperature is reduced again;
the other path of ice slurry flowing out of the water outlet (53) of the ice storage tank sequentially passes through a circulating pump regulating valve (21) and a circulating pump (10) and then enters an ice crystal filter (24), part of ice crystals are filtered in the ice crystal filter (24) to form ice water, the ice water enters a preheater (25) through an ice making water inlet valve (19), and the preheater (25) heats the ice water to a temperature above the freezing point to melt the ice crystals in the rest part of the ice water;
then, ice water enters a liquid inlet (211) of the heat pump evaporator, after sensible heat is released to an evaporator in the heat pump unit (2), the temperature is reduced to be supercooled water, the supercooled water flows out of a liquid outlet (212) of the heat pump evaporator, flows into the crystal promotion device (4) after passing through the ice crystal blocker (3), after supercooling is relieved in the crystal promotion device (4), part of cold water is changed into ice crystals, the temperature rises to the freezing point again, the supercooled water becomes ice slurry water, and the ice slurry water enters the ice storage tank (5) through an ice storage tank liquid inlet valve (15) and an ice storage tank ice slurry inlet (51) and is accumulated.
2. The method of using an ice storage heat source tower heat pump system as claimed in claim 1, wherein: the ice storage type heat source tower heat pump system device also comprises an ice crystal separator (8);
the solution tank (6) is provided with a solution tank ice crystal outlet (63) and a solution tank concentrated solution inlet (64);
an ice crystal separator liquid outlet (81), an ice crystal separator ice outlet (82) and an ice crystal separator inlet (83) are arranged on the ice crystal separator (8);
the ice crystal outlet (63) of the solution pool (6) is connected with the inlet (83) of the ice crystal separator, and the liquid outlet (81) of the ice crystal separator is connected with the concentrated solution inlet (64) of the solution pool.
3. The method of using an ice storage heat source tower heat pump system as claimed in claim 2, wherein: the ice storage type heat source tower heat pump system device also comprises an ice crystal conveyor (7);
an ice crystal outlet (63) of the solution tank (6) is connected with an ice crystal conveyor (7) and then is connected with an inlet (83) of an ice crystal separator.
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