CN115839524A - Air conditioning system with dynamic ice storage function and control method thereof - Google Patents
Air conditioning system with dynamic ice storage function and control method thereof Download PDFInfo
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- CN115839524A CN115839524A CN202211498584.0A CN202211498584A CN115839524A CN 115839524 A CN115839524 A CN 115839524A CN 202211498584 A CN202211498584 A CN 202211498584A CN 115839524 A CN115839524 A CN 115839524A
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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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Abstract
The invention discloses an air conditioning system for dynamic ice storage and a control method thereof, wherein the air conditioning system comprises a cooling water circulation system, an air conditioning unit, a chilled water circulation system, a plate heat exchanger group and a tail end device, wherein the air conditioning unit comprises a base load refrigerating unit, a first double-working-condition refrigerating unit and a second double-working-condition refrigerating unit which are arranged in parallel; the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit are also connected with an ice storage tank in parallel; the air conditioning system also comprises an ice storage tank; the plate type heat exchanger group comprises a water-water plate type heat exchanger and a water-glycol plate type heat exchanger which are arranged in parallel; the first dual-condition refrigerating unit and the second dual-condition refrigerating unit are connected with an ethylene glycol circulating pipeline, and the first dual-condition refrigerating unit and the second dual-condition refrigerating unit are sequentially connected with an ethylene glycol circulating pump set, an ice making unit, a micro ice crystal processor set, an ice making pump set and an ice storage tank from left to right through the ethylene glycol circulating pipeline to form a main machine ice making circulating loop.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to an air conditioning system for dynamic ice storage and a control method thereof.
Background
The air conditioning system consists of one or more cold and heat source systems and a plurality of air conditioning systems, adopts the principle of liquid gasification refrigeration to provide required cold energy for the air conditioning systems so as to offset the heat load of the indoor environment, and is a system for manually processing the temperature and the humidity of the indoor air.
Air conditioning systems in places such as general office buildings, markets, restaurants and the like are used in the daytime, and the power consumption of the air conditioning systems is an important factor causing peak load of a power grid when the air conditioning systems are in a power supply peak time of the power grid during the use period.
In order to solve the problem of peak load of a power grid, an air conditioning system energy storage technology is adopted in the prior art, the air conditioning energy storage technology can be used for performing peak shifting and valley filling on the power of the power grid, the peak shifting and valley filling is realized by storing cold energy produced in the low-valley period of night electricity price and releasing the cold energy for use in the high-peak period of day electricity price, and the purpose of peak shifting and valley filling is achieved. Is beneficial to the optimal allocation of the whole social resource. The air conditioning system energy storage technology is that energy storage equipment is utilized to store energy in the time that the air conditioning system does not need energy or uses less energy, and the energy is released in the time that the air conditioning system needs more energy.
At present, the energy storage technology of the air conditioning system is generally used and comprises a water cold storage technology, wherein a water storage container is adopted in the water cold storage technology, and when the cold power of a refrigerator is higher than the load of a user, redundant parts enter the water storage container; the cold energy can be selectively stored by starting more refrigerators at the flat period and the valley period in combination with different charges of peak, flat and valley electricity prices implemented by the power grid, and the cold energy is stored by starting less refrigerators at the peak period, and the insufficient part is supplemented by the cold energy in the water storage container, thereby achieving the purpose of saving the electricity charge. The existing chilled water storage technology has some disadvantages: the water cold storage is adopted, a very large and very large water storage container is needed, the occupied space of the water storage container is very large, in addition, the water is adopted, the temperature is only reduced, the water is not frozen, and the energy which cannot be stored is not frozen.
The existing air-conditioning system energy storage technology also has an energy storage mode of ice storage, and combines a time-of-use electricity price policy of an electric power system, an electric refrigerator is adopted for refrigeration in a night electricity consumption valley period, the prepared cold quantity is stored in an ice form, the ice is melted and the cold quantity is released in the daytime at the peak of the air-conditioning load electricity price so as to partially or completely meet the cooling demand, the existing ice storage mode adopts solid ice or ice balls, the solid ice or ice balls are very hard and difficult to melt, the ice cannot be melted in time when cooling is needed, the stored cold quantity can only be slowly released and cannot meet the load requirement, a refrigeration host machine needs to be started for combined cooling, the electricity consumption is large in the electricity consumption peak period, and the operation cost is high.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an air conditioning system which adopts ice slurry for cold accumulation, uses the ice slurry as an energy storage carrier, adopts an electric refrigerating unit for refrigeration, stores the prepared cold energy in the form of ice, melts the ice to release the cold energy in the peak of the air conditioning load electricity price in the daytime, is used for cold supply demand, has good energy-saving characteristic, can supply cold, can also make ice, and realizes conventional refrigeration and dynamic energy storage cold supply, and a control method thereof.
In order to solve the technical problems, the invention provides a dynamic ice cold storage air conditioning system which comprises a cooling water circulation system, an air conditioning unit, a chilled water circulation system, a plate heat exchanger set and a terminal device, wherein the cooling water circulation system and the chilled water circulation system are both connected with the air conditioning unit, the chilled water circulation system is connected with the plate heat exchanger set, and the plate heat exchanger set is connected with the terminal device;
the air conditioning unit comprises a base load refrigerating unit, a first double-working-condition refrigerating unit and a second double-working-condition refrigerating unit which are arranged in parallel;
the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit are also connected with an ice storage tank in parallel;
a cold discharge pump is connected between the ice storage tank and the plate type heat exchanger group;
the plate type heat exchanger group comprises a water-water plate type heat exchanger and a water-glycol plate type heat exchanger which are arranged in parallel, and the water-water plate type heat exchanger and the water-glycol plate type heat exchanger are both connected with terminal equipment;
the first dual-condition refrigerating unit and the second dual-condition refrigerating unit are connected with an ethylene glycol circulating pipeline, and the first dual-condition refrigerating unit and the second dual-condition refrigerating unit are sequentially connected with an ethylene glycol circulating pump set, an ice making unit, a micro ice crystal processor set, an ice making pump set and an ice storage tank from left to right through the ethylene glycol circulating pipeline to form a main machine ice making circulating loop;
the chilled water circulation system is connected with an ice making circulation loop of the main machine;
the ethylene glycol circulating pump group is used for circulating ethylene glycol among the first dual-working-condition refrigerating unit, the second dual-working-condition refrigerating unit and the ethylene glycol plate type heat exchanger, the ethylene glycol solution flows into the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit through an ethylene glycol circulating pipeline to exchange heat to obtain a cooled ethylene glycol solution, the ethylene glycol solution after heat exchange and cooling is pressurized by the ethylene glycol circulating pump group to enter the ice making unit to cool water flowing out of the cold storage tank and exchange heat with water flowing out of the cold storage tank so as to cool water in the ice storage tank to obtain a heated ethylene glycol solution, the heated ethylene glycol solution is pumped back into the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit by the ethylene glycol circulating pump group to exchange heat again for cooling, water in the ice storage tank forms sub-cooled water at the temperature of-2 ℃ after being cooled, ice slurry is formed under the action of the ice making unit, the prepared ice slurry is sent into the ice storage tank to be stored, and the ice slurry can form a natural layered state that the ice slurry is above and the water at the temperature of 0 ℃ under the condition due to density difference in the ice storage tank;
the other end of the ice storage tank is connected with the cooling pump, the water-water plate type heat exchanger and the water-glycol plate type heat exchanger, the ice storage tank, the cooling pump, the water-water plate type heat exchanger, the water-glycol plate type heat exchanger and the end equipment are connected to form an ice melting and cooling circulation pipeline so as to supply cold to the end equipment, and in daytime peak load, water at 0 ℃ in the cold storage tank flows into the water-water plate type heat exchanger and the water-glycol plate type heat exchanger from the lower water distributor through the cooling pump respectively to exchange heat to obtain cooled water, and the cooled water is pumped back into the ice storage tank by the cooling pump and sprayed onto ice slurry through the upper water distributor of the ice storage tank to melt ice; after the 12 ℃ chilled water flowing out of the water collector is subjected to heat exchange and cooling through the water-water plate type heat exchanger and the water-glycol plate type heat exchanger, the 7 ℃ chilled water is obtained and pressurized to the water separator through the chilled water pump set, and then flows to the tail end equipment for heat exchange and cold supply.
According to the technical scheme, the evaporator and the condenser are installed in the base load refrigerating unit, the first double-working-condition refrigerating unit and the second double-working-condition refrigerating unit, and the two independent unit freezing water pipelines and the unit cooling water pipelines are installed in the base load refrigerating unit, the first double-working-condition refrigerating unit and the second double-working-condition refrigerating unit.
The cooling water circulation system comprises a plurality of groups of cooling towers, a cooling water pipeline and cooling water pump sets corresponding to the air conditioning unit in number, water outlet ends of the plurality of groups of cooling towers are connected with water inlet ends of the cooling water pump sets through the cooling water pipeline, and water outlet ends of the cooling water pump sets are connected with a base load refrigerating unit, a first dual-working-condition refrigerating unit and a second dual-working-condition refrigerating unit of the air conditioning unit in a one-to-one correspondence mode to achieve communication between the air conditioning unit and the plurality of groups of cooling towers.
Aiming at further improvement of the technical scheme, the cooling water pipeline is divided into a cooling water supply pipeline and a cooling water return pipeline, one end of the cooling water supply pipeline is communicated with water outlet ends of a plurality of groups of cooling towers, and the other end of the cooling water supply pipeline is communicated with a cooling water pump group, a base load refrigerating unit, a first dual-working-condition refrigerating unit and a second dual-working-condition refrigerating unit; one end of the cooling water return pipeline is connected with the water outlet ends of the base load refrigerating unit, the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit, and the other end of the cooling water return pipeline is communicated with the water inlet ends of the plurality of groups of cooling towers.
According to the technical scheme, the refrigerating water circulation system comprises a refrigerating water pump set, a refrigerating water pipeline, a water separator and a water collector, one end of the refrigerating water pump set is connected with the water-water plate type heat exchanger through the refrigerating water pipeline, the other end of the refrigerating water pump set is connected with one end of the water separator through the refrigerating water pipeline, the base load refrigerating unit, the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit are connected with the water-water plate type heat exchanger and the refrigerating water pump set through refrigerating water pipes, the other end of the water separator is connected with an inlet of end equipment, a water outlet end of the end equipment is connected with one end of the water collector, the water collector is further connected with the refrigerating water pump set through the refrigerating water pipeline, and the base load refrigerating unit, the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit are further connected with the water separator and the end equipment through refrigerating water pipes.
Aiming at the further improvement of the technical scheme, the chilled water pipeline is divided into a chilled water supply pipeline and a chilled water return pipeline, and the base-load refrigerating unit is connected with the water plate type heat exchanger, the chilled water pump set and the water distributor through the chilled water supply pipeline; the water collector is connected with the chilled water pump set and the base load refrigerating unit through a chilled water return pipe.
Aiming at the further improvement of the technical scheme, the chilled water circulating system comprises a differential pressure bypass controller, and the differential pressure bypass controller is arranged between the water separator and the water collector.
Aiming at the further improvement of the technical scheme, an upper water distributor and a lower water distributor are arranged in the ice storage tank, and the upper water distributor is arranged above the lower water distributor.
The invention also provides a control method for controlling the dynamic ice storage by adopting the air conditioning system, which adopts the following five modes to operate: the control method adopts the following five modes to operate: A. a direct cold supply mode (one or more refrigerating units directly supply cold), a cold accumulation mode (one or two double-working-condition refrigerating units accumulate cold), a simultaneous cold accumulation and cold supply mode (a base-load refrigerating unit supplies cold and one or two double-working-condition refrigerating machines accumulate cold), a combined cold supply mode (one or more devices directly supply cold and an ice storage tank discharges cold), and an independent cold discharge mode (only the ice storage tank melts ice and discharges cold and the refrigerating units are not started);
A. direct cooling mode: the method comprises the following steps that a chilled water pump set and one or more refrigerating units are started, the chilled water pump set sends chilled water into an evaporator coil in a base-load refrigerating unit, and the chilled water exchanges heat with a refrigerant of an evaporator in the base-load refrigerating unit to be cooled to form low-temperature chilled water, the low-temperature chilled water is sent to a water separator through a chilled water supply pipeline and sent to end equipment through the water separator for refrigeration of a user, and exchanges heat with each coil fan of the end equipment for refrigeration, so that the purpose of cooling is achieved;
B. cold storage mode: starting a first dual-working-condition refrigerating unit, a second dual-working-condition refrigerating unit, an ice making unit and a refrigerating water pump set matched with the ice making unit, pressurizing a glycol solution subjected to heat exchange and temperature reduction through a glycol circulating pump set to enter the ice making unit for cooling water flowing out of a cold storage tank, performing heat exchange with the water flowing out of the cold storage tank so as to cool the water in an ice storage tank to obtain a heated glycol solution, pumping the heated glycol solution back to the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit through the glycol circulating pump set for heat exchange and temperature reduction again, cooling the water in the ice storage tank to form supercooled water at the temperature of-2 ℃, forming ice slurry through the action of the ice making unit, and flowing into the ice storage tank for storage;
C. and simultaneously, a cold accumulation and supply mode:
1. the method comprises the following steps that a chilled water pump set and a base-load refrigerating unit are started, the chilled water pump set sends chilled water into an evaporator coil in the base-load refrigerating unit, the chilled water exchanges heat with a refrigerant of an evaporator in the base-load refrigerating unit and is cooled to form low-temperature chilled water, the low-temperature chilled water is sent to a water distributor through a chilled water supply pipeline, the low-temperature chilled water enters the water distributor through the chilled water supply pipeline and is sent to terminal equipment through the water distributor to be refrigerated by a user, and the low-temperature chilled water exchanges heat with coil fans of the terminal equipment to be refrigerated, so that the purpose of cooling is achieved;
2. the first dual-working-condition refrigerating unit, the second dual-working-condition refrigerating unit, the ice making unit and a refrigerating water pump set matched with the ice making unit are started, the glycol subjected to heat exchange and temperature reduction is pressurized by the glycol circulating pump set to enter the ice making unit and exchanges heat with the water flowing out of the cooling cold storage tank so as to cool the water in the ice storage tank and obtain the heated glycol, the heated glycol solution is pumped back to the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit by the glycol circulating pump set to be cooled again, the water in the ice storage tank is cooled to form sub-cooled water at the temperature of-2 ℃, ice slurry is formed under the action of the ice making unit and flows into the ice storage tank to be stored;
D. combined cooling mode: the method comprises the following steps that a chilled water pump set and one or more refrigerating units are started, the chilled water pump set sends chilled water into an evaporator coil in a base-load refrigerating unit and exchanges heat with a refrigerant of an evaporator in the base-load refrigerating unit to reduce the temperature to form low-temperature chilled water, the low-temperature chilled water is sent to a water distributor through a chilled water supply pipeline, the low-temperature chilled water enters the water distributor through the chilled water supply pipeline and is sent to end equipment through the water distributor to be refrigerated by a user, and exchanges heat with coil fans of the end equipment to refrigerate, so that the purpose of reducing the temperature is achieved;
E. independent cooling mode: and starting the cooling pump, enabling water at 0 ℃ in the cold storage tank to flow into the water-water plate type heat exchanger from the lower water distributor through the cooling pump, cooling the chilled water, pumping the chilled water back into the ice storage tank by the cooling pump, spraying the chilled water onto ice slurry through the upper water distributor of the ice storage tank to melt ice, enabling the chilled water at 12 ℃ flowing out of the water collector to exchange heat in the water-water plate type heat exchanger, cooling the chilled water through heat exchange to obtain chilled water at 7 ℃, pressurizing the chilled water at 7 ℃ to the water distributor through the chilled water pump group, and then flowing to the terminal equipment to perform heat exchange refrigeration.
Compared with the prior art, the scheme of the invention at least comprises the following beneficial effects:
(1) The air conditioning system comprises a cooling water circulation system, an air conditioning unit, a chilled water circulation system, a plate heat exchanger group and a tail end device, wherein the air conditioning unit comprises a base load refrigerating unit, a first double-working-condition refrigerating unit and a second double-working-condition refrigerating unit which are arranged in parallel; the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit are also connected with an ice storage tank in parallel; the plate type heat exchanger group comprises a water-water plate type heat exchanger and a water-glycol plate type heat exchanger which are arranged in parallel, and the water-water plate type heat exchanger and the water-glycol plate type heat exchanger are both connected with terminal equipment; the first dual-condition refrigerating unit and the second dual-condition refrigerating unit are connected with an ethylene glycol circulating pipeline, and the first dual-condition refrigerating unit and the second dual-condition refrigerating unit are sequentially connected with an ethylene glycol circulating pump set, an ice making unit, a micro ice crystal processor set, an ice making pump set and an ice storage tank from left to right through the ethylene glycol circulating pipeline to form a main machine ice making circulating loop; the chilled water circulation system is connected with the ice making circulation loop of the main machine. The invention pumps the glycol cooled by the glycol circulating pump group and the glycol circulating pipeline into the ice making machine set, uses the glycol to prepare ice slurry by the ice making machine set, the prepared ice slurry is ice water mixture with the temperature of 0 ℃, the prepared ice slurry is sent into the ice storage tank for storage, and when the peak load is in the daytime, the water with the temperature of 0 ℃ at the lower part of the ice storage tank is pumped to the water-water plate heat exchanger for heat exchange through the chilled water circulating pipeline and the chilled water pump group in the chilled water circulating system. The invention prepares dynamic ice for cold accumulation through the ice making machine set, uses the dynamic ice as an energy storage carrier, stores the prepared cold energy in the form of ice, melts the ice to release the cold energy at the peak of the air conditioner load electricity price in the daytime, thereby meeting the requirement of cold supply of users. The air conditioning system has good energy-saving characteristic, can supply cold, can make ice, and realizes conventional refrigeration and dynamic energy storage cold supply. The air conditioning system of the invention is particularly suitable for the occasions with concentrated and large-change loads, such as: the air conditioning system can be widely applied to gymnasiums, movie theaters, music halls and the like, and the using effect of the air conditioning system can be improved.
(2) The chilled water circulation system comprises a differential pressure bypass controller, wherein the differential pressure bypass controller is arranged between a water distributor and a water collector, and the differential pressure between the water distributor and the water collector is balanced by the differential pressure bypass controller, so that the differential pressure between a chilled water supply pipeline and a chilled water return pipeline is prevented from being too large.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a general system schematic of the air conditioning system of the present invention;
FIG. 2 is an enlarged detail schematic view of the connection of the air conditioning unit and the plate heat exchanger package of the present invention;
FIG. 3 is a detailed schematic view of the cooling water circulation system of the present invention;
FIG. 4 is a detailed schematic diagram of the chilled water circulation system and glycol circulation line connections of the present invention;
FIG. 5 is an enlarged detail view showing the connection of the ice storage tank, the ice maker set, the micro ice crystal processor set and the ice maker pump set according to the present invention.
In the figure, an air conditioning unit 1, a base load refrigerating unit 11, a first double-working-condition refrigerating unit 12, a second double-working-condition refrigerating unit 13, a plate heat exchanger group 2, a water-glycol plate heat exchanger 22, a water-water plate heat exchanger 21, a cooling water circulating system 3, a cooling tower 31, a cooling water pipeline 32, a cooling water supply pipeline 321, a cooling water return pipeline 322, a cooling water pump group 33, a chilled water circulating system 4, a chilled water pump group 41, a chilled water pipeline 42, a chilled water supply pipeline 421, a chilled water return pipeline 422, a water separator 43, a water collector 44, a differential pressure bypass controller 45, an ice storage tank 5, a cold discharge pump 53, a glycol circulating pump group 6, an ice making unit 7, a micro ice crystal processor group 8, an ice making pump group 9 and an expansion water tank 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, an embodiment of the present invention provides a dynamic ice storage air conditioning system, which includes a cooling water circulation system 3, an air conditioning unit 1, a chilled water circulation system 4, a plate heat exchanger group 2, and a terminal device, where the cooling water circulation system 3 and the chilled water circulation system 4 are both connected to the air conditioning unit 1, the chilled water circulation system 4 is connected to the plate heat exchanger group 2, and the plate heat exchanger group 2 is connected to the terminal device; wherein the content of the first and second substances,
the air conditioning unit 1 comprises a base load refrigerating unit 11, a first double-working-condition refrigerating unit 12 and a second double-working-condition refrigerating unit 13 which are arranged in parallel;
the first dual-working-condition refrigerating unit 12 and the second dual-working-condition refrigerating unit 13 are also connected with an ice storage tank 5 in parallel;
the ice storage tank 5 is internally provided with an upper water distributor and a lower water distributor, the upper water distributor is arranged above the lower water distributor, and an accommodating space is formed between the upper water distributor and the lower water distributor of the ice storage tank 5 and is used for storing water quantity of 0 ℃ required in the ice storage process of the ice storage tank 5.
The invention also connects the cold pump 53 between the ice storage tank 5 and the plate heat exchanger group 2;
the plate type heat exchanger group 2 comprises a water-water plate type heat exchanger 21 and a water-glycol plate type heat exchanger 22 which are arranged in parallel, and the water-water plate type heat exchanger 21 and the water-glycol plate type heat exchanger 22 are both connected with terminal equipment;
the first dual-condition refrigerating unit 12 and the second dual-condition refrigerating unit 7 are both connected with a glycol circulation pipeline, the first dual-condition refrigerating unit 7 and the second dual-condition refrigerating unit 12 are connected with one end of an ice making coil pipe in the ice storage tank 5 through the glycol circulation pipeline, and the first dual-condition refrigerating unit 12 and the second dual-condition refrigerating unit 13 are sequentially connected with a glycol circulation pump group 6, an ice making unit 7, a micro ice crystal processor group 8, an ice making pump group 9 and the ice storage tank 5 from left to right through the glycol circulation pipeline to form a main machine ice making circulation loop;
the chilled water circulating system 4 is connected with an ice making circulating loop of the main machine;
the chilled water circulation system 4 comprises a chilled water pump set 41, a chilled water pipeline 42, a water distributor 43 and a water collector 44, wherein one end of the chilled water pump set 41 is connected with the water-water plate type heat exchanger 21 through the chilled water pipeline 42, the other end of the chilled water pump set 41 is connected with one end of the water distributor 43 through the chilled water pipeline 42, a base-mounted refrigerating unit 11, a first dual-working-condition refrigerating unit 12 and a second dual-working-condition refrigerating unit 13 are connected with the water-water plate type heat exchanger 21 and the chilled water pump set 41 through chilled water pipes, the other end of the water distributor 43 is connected with an inlet of end equipment, a water outlet end of the end equipment is connected with one end of the water collector 44, the water collector 44 is also connected with the chilled water pump set 41 through the chilled water pipeline 42, and the base-mounted refrigerating unit 11, the first dual-working-condition refrigerating unit 12 and the second dual-working-condition refrigerating unit 13 are also connected with the water distributor 43 and the end equipment through chilled water pipes. The chilled water pump unit 41 is provided with three chilled water pumps and a chilled water standby pump, the base load refrigerating unit 11, the first dual-working-condition refrigerating unit 12 and the second dual-working-condition refrigerating unit 13 are respectively connected with one chilled water pump in a one-to-one correspondence manner, the chilled water pipeline 42 is divided into a chilled water supply pipeline 421 and a chilled water return pipeline 422, and the base load refrigerating unit 11 is connected with the water-water plate type heat exchanger 21, the chilled water pump unit 41 and the water separator 43 through the chilled water supply pipeline 421; the water collector 44 is connected with the chilled water pump unit 41 and the base-load refrigerating unit 11 through the chilled water return pipe 422, chilled water is sent into an evaporator coil inside the base-load refrigerating unit 11 through the chilled water pump unit 41 and exchanges heat with a refrigerant of an evaporator inside the base-load refrigerating unit 11 to be cooled to form low-temperature chilled water, the low-temperature chilled water is sent to the water distributor 43 through the chilled water supply pipe 421, and the low-temperature chilled water is sent to the end equipment through the water distributor 43 and exchanges heat with each coil fan of the end equipment to be cooled, so that the purpose of cooling is achieved; the chilled water after heat exchange and temperature rise flows to the water collector 44 through the chilled water return pipe 422, the chilled water of the water collector 44 is pumped back by the chilled water pump unit 41 through the chilled water return pipe 422, is pumped into the base load refrigerating unit 11 again through the chilled water pump unit 41 for heat exchange and refrigeration, and is sent to each coil pipe fan of the terminal equipment, and the operation is repeated, so that the circulation of the chilled water circulation system 4 is realized.
The glycol circulating pump unit 6 is used for circulating glycol solution among the first dual-condition refrigerating unit 7, the second dual-condition refrigerating unit 13 and the glycol plate heat exchanger. When the invention is concretely realized, a glycol solution flows into a first dual-working-condition refrigerating unit 12 and a second dual-working-condition refrigerating unit 13 through a glycol circulation pipeline for heat exchange to obtain a cooled glycol solution, the glycol solution after heat exchange and temperature reduction is pressurized by a glycol circulation pump unit 6 to enter an ice making unit 7 for cooling water flowing out of a cold storage tank 5 and exchanges heat with the water flowing out of the cold storage tank 5 so as to cool the water in an ice storage tank 5 to obtain a heated glycol solution, the heated glycol solution is pumped into the first dual-working-condition refrigerating unit 12 and the second dual-working-condition refrigerating unit 13 by the glycol circulation pump unit 6 for heat exchange and temperature reduction again, the water in the ice storage tank 5 is cooled to form supercooled water at minus 2 ℃, ice slurry is formed under the action of the ice making unit 7, the prepared ice slurry is sent into the ice storage tank 5 for storage, and the ice slurry can form a natural layered state with the ice slurry at the upper temperature and the lower temperature due to density difference in the ice storage tank 5. The ice making machine set 7 adopted by the invention is an ultrasonic wave crystal promoting device which is a container with ultrasonic wave radiation, supercooled water is quickly converted into ice slurry under the stimulation of ultrasonic wave, a micro ice crystal processor set 8 plays a role in filtering the ice slurry, the prepared ice slurry is sent into an ice storage tank 5 for storage, and the ice slurry can form a natural layering state with the ice slurry at the upper part and the water at the 0 ℃ at the lower part in the ice storage tank 5 due to density difference;
the other end of the ice storage tank 5 is connected with the cooling pump 53, the water-water plate type heat exchanger 21 and the water-glycol plate type heat exchanger 22, and the ice storage tank 5, the cooling pump 53, the water-water plate type heat exchanger 21, the water-glycol plate type heat exchanger 22 and the terminal equipment are connected to form an ice melting and cooling circulation pipeline so as to supply cold to users; during peak load in daytime, water at 0 ℃ in the cold storage tank 5 flows into the water-water plate type heat exchanger 21 and the water-ethylene glycol plate type heat exchanger 22 from the lower water distributor through the cold discharge pump respectively for heat exchange to obtain cooled water, the cooled water is pumped back into the ice storage tank 5 by the cold discharge pump 53 and is sprayed onto ice slurry through the upper water distributor of the ice storage tank 5 for ice melting; after the 12 ℃ chilled water flowing out of the water collector is subjected to heat exchange and cooling through the water-water plate type heat exchanger 21 and the water-glycol plate type heat exchanger 22, the 7 ℃ chilled water is obtained, is pressurized to the water separator 43 through the chilled water pump unit 41, and then flows to the terminal equipment for heat exchange and cold supply.
In the invention, evaporators and condensers are respectively arranged in the base load refrigerating unit 11, the first double-working-condition refrigerating unit 12 and the second double-working-condition refrigerating unit 13, and two independent unit freezing water pipelines 42 and unit cooling water pipelines 32 are respectively arranged in the base load refrigerating unit 11, the first double-working-condition refrigerating unit 12 and the second double-working-condition refrigerating unit 13.
In the concrete implementation of the invention, the cooling water circulation system 3 comprises a plurality of groups of cooling towers 31, cooling water pipelines 32 and cooling water pump sets 33 corresponding to the number of the air conditioning units 1, wherein the water outlet ends of the plurality of groups of cooling towers 31 are connected with the water inlet end of the cooling water pump set 33 through the cooling water pipelines 32, and the water outlet end of the cooling water pump set 33 is correspondingly connected with the base load refrigerating unit 11, the first dual-working-condition refrigerating unit 12 and the second dual-working-condition refrigerating unit 13 of the air conditioning unit 1 one by one to realize the communication between the air conditioning unit 1 and the plurality of groups of cooling towers 31, so that the cooling water circulation system 3 is formed. The cooling tower 31 is provided with three groups, the cooling water pump group 33 is also provided with three cooling water pumps and a cooling water backup pump, the cooling water pipeline 32 is divided into a cooling water supply pipeline 321 and a cooling water return pipeline 322, one end of the cooling water supply pipeline 321 is communicated with the water outlet ends of the groups of cooling towers 31, and the other end of the cooling water supply pipeline 321 is communicated with the cooling water pump group 33, the base load refrigerating unit 11, the first dual-operating-condition refrigerating unit 12 and the second dual-operating-condition refrigerating unit 13; one end of a cooling water return pipeline 322 is connected with the water outlet ends of the base load refrigerating unit 11, the first dual-condition refrigerating unit 12 and the second dual-condition refrigerating unit 13, the other end of the cooling water return pipeline 322 is communicated with the water inlet ends of the groups of cooling towers 31, cooling water cooled by the three groups of cooling towers 31 is pumped into condensers inside the base load refrigerating unit 11, the first dual-condition refrigerating unit 12 and the second dual-condition refrigerating unit 13 through a cooling water supply pipeline 321 and a cooling water pump group 33, so that heat of the base load refrigerating unit 11, the first dual-condition refrigerating unit 12 and the second dual-condition refrigerating unit 13 is taken away by heat exchange of the cooling water with the base load refrigerating unit 11, the first dual-condition refrigerating unit 12 and the condenser inside the second dual-condition refrigerating unit 13, the heated cooling water is obtained, the cooled water after heating and returning to the groups of the cooling towers 31, enters the base load refrigerating unit 11, the first dual-condition refrigerating unit 12 and the water outlet end of the second dual-condition refrigerating unit 13 from the base load refrigerating unit 11, the first dual-condition refrigerating unit 12 and the second dual-condition refrigerating unit 13 through the cooling water return to the groups of the cooling towers 31, and the first dual-condition refrigerating unit 11 and the second dual-condition refrigerating unit 13, and the dual-condition refrigerating unit 11 and the second dual-condition refrigerating unit 13 are discharged by the working conditions of the two-condition refrigerating unit 31.
During the specific implementation of the invention, the chilled water circulation system 4 comprises an expansion water tank 10, the other end of a water collector 44 is connected with the expansion water tank 10, the expansion water tank 10 is connected with tap water, the chilled water circulation system 4 comprises a differential pressure bypass controller 45, the differential pressure bypass controller 45 is installed between a water distributor 43 and the water collector 44, and the differential pressure bypass controller 45 automatically adjusts according to the differential pressure of a chilled water pipeline 42 where the water distributor 43 and the water collector 44 are located, so as to keep the air conditioning unit 1 to have enough water quantity and enough water supply and return differential pressure on the load side, and simultaneously prevent the differential pressure of the chilled water pipeline 42 where the water distributor 43 and the water collector 44 are located from being too large.
In the embodiment of the present invention, temperature sensors are respectively installed on the pipes connecting the base-load refrigeration unit 11, the first dual-operating-condition refrigeration unit 12, the second dual-operating-condition refrigeration unit 13, the cooling water supply pipe 321, the cooling water return pipe 322, the chilled water supply pipe 421, and the chilled water return pipe 422, and the temperature sensors respectively detect the temperatures of the supplied cooling water, the recovered cooling water, the supplied chilled water, and the recovered chilled water.
When the invention is concretely realized, electric butterfly valves of the refrigerating units are arranged on pipelines where the base load refrigerating unit 11, the first double-working-condition refrigerating unit 12 and the second double-working-condition refrigerating unit 13 are arranged, the electric butterfly valve of the cooling tower 31 is arranged on the cooling tower 31, the electric butterfly valve of the cooling water is arranged on the cooling water pipeline 32, and the electric butterfly valve of the chilled water is arranged on the chilled water pipeline 42.
The control starting sequence of the air conditioning system of the invention is as follows:
(1) The starting program of the air conditioning system comprises a cooling tower 31 → a cooling tower electric butterfly valve → a cooling water pump set 33 → a cooling water electric butterfly valve → a chilled water pump set 41 → a chilled water electric butterfly valve → an air conditioning unit 1;
(2) And a shutdown procedure of the air conditioning unit 1 → the electric butterfly valve for chilled water → the pump unit for chilled water 41 → the electric butterfly valve for cooling water → the pump unit for cooling water 33 → the electric butterfly valve for cooling tower → the cooling tower 31.
The invention also provides a control method for controlling dynamic ice storage by adopting the air conditioning system, which adopts the following five modes to operate: A. a direct cold supply mode (one or more refrigerating units directly supply cold), a cold accumulation mode (one or two double-working-condition refrigerating units accumulate cold), a simultaneous cold accumulation and cold supply mode (a base-load refrigerating unit 11 supplies cold and one or two double-working-condition refrigerating units accumulate cold), a combined cold supply mode (one or more devices directly supply cold and an ice storage tank discharges cold), and an independent cold discharge mode (only the ice storage tank melts ice and discharges cold and the refrigerating units are not started);
A. direct cooling mode: starting a chilled water pump unit 41 and one or more refrigerating unit 7, wherein the chilled water pump unit 41 sends chilled water into an evaporator coil in the base-load refrigerating unit 11 and exchanges heat with a refrigerant of an evaporator in the base-load refrigerating unit 11 to cool the chilled water to form low-temperature chilled water, the low-temperature chilled water is sent to a water separator 43 through a chilled water supply pipeline 421, the low-temperature chilled water enters the water separator 43 through the chilled water supply pipeline 421 and is sent to the end equipment through the water separator 43 for refrigeration of a user, and exchanges heat with each coil fan of the end equipment to refrigerate, so that the purpose of cooling is achieved;
B. cold storage mode: starting a first dual-working-condition refrigerating unit 12, a second dual-working-condition refrigerating unit 13, an ice making unit 7 and a matched chilled water pump set 41 thereof, pressurizing a heat-exchanged and cooled glycol solution through a glycol circulating pump set 6, allowing the glycol solution to enter the ice making unit 7 to cool water flowing out of a cold storage tank 5, exchanging heat with the water flowing out of the cold storage tank 5 so as to cool the water in an ice storage tank 5 to obtain a heated glycol solution, pumping the heated glycol solution back to the first dual-working-condition refrigerating unit 12 and the second dual-working-condition refrigerating unit 13 through the glycol circulating pump set 6 to exchange heat again for cooling, cooling the water in the ice storage tank 5 to form supercooled water at the temperature of-2 ℃, forming ice slurry through the action of the ice making unit 7, and flowing into the ice storage tank 5 to be stored;
C. and simultaneously, a cold accumulation and supply mode:
1. the method comprises the steps that a chilled water pump unit 41 and a base-load refrigerating unit 11 are started, chilled water is sent into an evaporator coil in the base-load refrigerating unit 11 by the chilled water pump unit 41 and exchanges heat with a refrigerant of an evaporator in the base-load refrigerating unit 11 to be cooled to form low-temperature chilled water, the low-temperature chilled water is sent to a water separator through a chilled water supply pipeline 421, the low-temperature chilled water enters a water separator 43 through the chilled water supply pipeline 421 and is sent to a terminal device through the water separator 43 to be refrigerated by a user, and exchanges heat with each coil fan of the terminal device to be refrigerated, so that the purpose of cooling is achieved;
2. starting a first dual-working-condition refrigerating unit 12, a second dual-working-condition refrigerating unit 13, an ice making unit 7 and a refrigerating water pump set 41 matched with the ice making unit 7, pressurizing and feeding the heat-exchanged and cooled glycol solution into the ice making unit 7 through a glycol circulating pump set 6, exchanging heat with water flowing out of a cooling cold storage tank 5 so as to cool water in an ice storage tank 5 and obtain the heated glycol solution, pumping the heated glycol solution back into the first dual-working-condition refrigerating unit 12 and the second dual-working-condition refrigerating unit 13 through the glycol circulating pump set 6 to cool again, cooling water in the ice storage tank 5 to form sub-cooled water at the temperature of-2 ℃, forming ice slurry through the action of the ice making unit 7, and flowing into the ice storage tank 5 to be stored;
D. combined cooling mode: the method comprises the following steps that a chilled water pump unit 41 and one or more refrigerating units are started, the chilled water pump unit 41 sends chilled water into an evaporator coil inside a base-load refrigerating unit 11 and exchanges heat with a refrigerant of an evaporator inside the base-load refrigerating unit 11 to cool the chilled water to form low-temperature chilled water, the low-temperature chilled water is sent to a water distributor 43 through a chilled water supply pipeline 421, the low-temperature chilled water enters the water distributor 43 through the chilled water supply pipeline 421 and is sent to a terminal device through the water distributor 43 to be refrigerated by a user, and exchanges heat with each coil fan of the terminal device to refrigerate, so that the purpose of cooling is achieved;
E. independent cooling mode: the cold release pump 53 is started, water with the temperature of 0 ℃ in the cold storage tank flows into the water-water plate type heat exchanger 21 from the lower water distributor through the cold release pump 53, and after cooling the chilled water, the chilled water is pumped back into the ice storage tank 5 by the cold release pump 53 and is sprayed onto ice slurry to melt ice through the upper water distributor of the ice storage tank 5; the 12 ℃ chilled water flowing out of the water collector 44 is cooled to 7 ℃ in the water-water plate heat exchanger 21 through heat exchange and pressurized to the water separator 43 through the chilled water pump unit 6, and then flows to the end equipment for heat exchange and cold supply.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (9)
1. The utility model provides an air conditioning system of developments ice cold-storage which characterized in that: the air conditioning system comprises a cooling water circulation system, an air conditioning unit, a chilled water circulation system, a plate heat exchanger set and a tail end device, wherein the cooling water circulation system and the chilled water circulation system are both connected with the air conditioning unit;
the air conditioning unit comprises a base load refrigerating unit, a first double-working-condition refrigerating unit and a second double-working-condition refrigerating unit which are arranged in parallel;
the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit are also connected with an ice storage tank in parallel;
a cold discharge pump is connected between the ice storage tank and the plate type heat exchanger group;
the plate type heat exchanger group comprises a water-water plate type heat exchanger and a water-glycol plate type heat exchanger which are arranged in parallel, and the water-water plate type heat exchanger and the water-glycol plate type heat exchanger are both connected with terminal equipment;
the first dual-condition refrigerating unit and the second dual-condition refrigerating unit are connected with an ethylene glycol circulating pipeline, and the first dual-condition refrigerating unit and the second dual-condition refrigerating unit are sequentially connected with an ethylene glycol circulating pump set, an ice making unit, a micro ice crystal processor set, an ice making pump set and an ice storage tank from left to right through the ethylene glycol circulating pipeline to form a main machine ice making circulating loop;
the chilled water circulation system is connected with an ice making circulation loop of the main machine;
the ethylene glycol circulating pump set is used for circulating ethylene glycol solution among the first dual-working-condition refrigerating unit, the second dual-working-condition refrigerating unit and the ethylene glycol plate heat exchanger, the ethylene glycol solution flows into the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit through an ethylene glycol circulating pipeline for heat exchange to obtain a cooled ethylene glycol solution, the ethylene glycol solution after heat exchange and cooling is pressurized through the ethylene glycol circulating pump set to enter water flowing out of a cooling cold storage tank of the ice making unit and exchange heat with water flowing out of the cold storage tank so as to cool water in the ice storage tank to obtain the heated ethylene glycol solution, the heated ethylene glycol solution is pumped back into the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit by the ethylene glycol circulating pump set for heat exchange and cooling again, water in the ice storage tank forms-2 ℃ subcooled water after being cooled, forms ice slurry through the action of the ice making unit and then flows into the ice storage tank for storage;
the other end of the ice storage tank is connected with the cooling pump, the water-water plate type heat exchanger and the water-ethylene glycol plate type heat exchanger, and the ice storage tank, the cooling pump, the water-water plate type heat exchanger, the water-ethylene glycol plate type heat exchanger and the terminal equipment are connected to form an ice melting and cooling circulation pipeline so as to supply cold to the terminal equipment.
2. The dynamic ice thermal storage air conditioning system of claim 1, wherein: the evaporator and the condenser are installed in the base load refrigerating unit, the first double-working-condition refrigerating unit and the second double-working-condition refrigerating unit, and two independent unit refrigerating water pipelines and unit cooling water pipelines are installed in the base load refrigerating unit, the first double-working-condition refrigerating unit and the second double-working-condition refrigerating unit.
3. The dynamic ice thermal storage air conditioning system of claim 1, wherein: the cooling water circulation system comprises a plurality of groups of cooling towers, a cooling water pipeline and cooling water pump sets corresponding to the air conditioning units in number, the water outlet ends of the plurality of groups of cooling towers are connected with the water inlet end of the cooling water pump set through the cooling water pipeline, and the water outlet end of the cooling water pump set is connected with the base load refrigerating unit, the first double-working-condition refrigerating unit and the second double-working-condition refrigerating unit of the air conditioning unit in a one-to-one correspondence mode so as to achieve communication between the air conditioning unit and the plurality of groups of cooling towers.
4. The dynamic ice thermal storage air conditioning system of claim 3, wherein: the cooling water pipeline is divided into a cooling water supply pipeline and a cooling water return pipeline, one end of the cooling water supply pipeline is communicated with the water outlet ends of the plurality of groups of cooling towers, and the other end of the cooling water supply pipeline is communicated with the cooling water pump group, the base load refrigerating unit, the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit; one end of the cooling water return pipeline is connected with the water outlet ends of the base load refrigerating unit, the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit, and the other end of the cooling water return pipeline is communicated with the water inlet ends of the plurality of groups of cooling towers.
5. The dynamic ice thermal storage air conditioning system of claim 1, wherein: the chilled water circulation system comprises a chilled water pump set, a chilled water pipeline, a water distributor and a water collector, wherein one end of the chilled water pump set is connected with a water-water plate type heat exchanger through the chilled water pipeline, the other end of the chilled water pump set is connected with one end of the water distributor through the chilled water pipeline, a base load refrigerating unit, a first dual-working-condition refrigerating unit and a second dual-working-condition refrigerating unit are connected with the water-water plate type heat exchanger and the chilled water pump set through the chilled water pipeline, the other end of the water distributor is connected with an inlet of terminal equipment, a water outlet end of the terminal equipment is connected with one end of the water collector, the water collector is further connected with the chilled water pump set through the chilled water pipeline, and the base load refrigerating unit, the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit are further connected with the water distributor and the terminal equipment through the chilled water pipeline.
6. The dynamic ice thermal storage air conditioning system of claim 5, wherein: the chilled water pipeline is divided into a chilled water supply pipeline and a chilled water return pipeline, the base-load refrigerating unit is connected with the water plate type heat exchanger, the chilled water pump set and the water distributor through the chilled water supply pipeline, and the water collector is connected with the chilled water pump set and the base-load refrigerating unit through the chilled water return pipeline.
7. The dynamic ice thermal storage air conditioning system of claim 5, wherein: the chilled water circulation system comprises a differential pressure bypass controller, and the differential pressure bypass controller is arranged between the water separator and the water collector.
8. The dynamic ice thermal storage air conditioning system of claim 1, wherein: an upper water distributor and a lower water distributor are arranged in the ice storage tank, and the upper water distributor is arranged above the lower water distributor.
9. A control method for controlling dynamic ice storage using the air conditioning system as claimed in claim 1, characterized in that: the control method adopts the following five modes to operate: A. a direct cold supply mode (one or more refrigerating units directly supply cold), a cold accumulation mode (one or two double-working-condition refrigerating units accumulate cold), a simultaneous cold accumulation and cold supply mode (a base-load refrigerating unit supplies cold and one or two double-working-condition refrigerating machines accumulate cold), a combined cold supply mode (one or more devices directly supply cold and an ice storage tank discharges cold), and an independent cold discharge mode (only the ice storage tank melts ice and discharges cold and the refrigerating units are not started);
A. direct cooling mode: the method comprises the following steps that a chilled water pump set and one or more refrigerating units are started, the chilled water pump set sends chilled water into an evaporator coil in a base-load refrigerating unit and exchanges heat with a refrigerant of an evaporator in the base-load refrigerating unit to reduce the temperature to form low-temperature chilled water, the low-temperature chilled water is sent to a water distributor through a chilled water supply pipeline and is sent to end equipment through the water distributor for refrigeration of a user, and exchanges heat with each coil fan of the end equipment to refrigerate, so that the purpose of reducing the temperature is achieved;
B. cold storage mode: starting a first dual-working-condition refrigerating unit, a second dual-working-condition refrigerating unit, an ice making unit and a refrigerating water pump set matched with the ice making unit, pressurizing a glycol solution subjected to heat exchange and temperature reduction through a glycol circulating pump set to enter the ice making unit for cooling water flowing out of a cold storage tank, performing heat exchange with the water flowing out of the cold storage tank so as to cool the water in an ice storage tank to obtain a heated glycol solution, pumping the heated glycol solution back to the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit through the glycol circulating pump set for heat exchange and temperature reduction again, cooling the water in the ice storage tank to form supercooled water at the temperature of-2 ℃, forming ice slurry through the action of the ice making unit, and flowing into the ice storage tank for storage;
C. and simultaneously, a cold accumulation and supply mode:
1. the method comprises the steps that a chilled water pump set and a base-load refrigerating unit are started, the chilled water pump set sends chilled water into an evaporator coil in the base-load refrigerating unit, the chilled water and a refrigerant of an evaporator in the base-load refrigerating unit are subjected to heat exchange and cooling to form low-temperature chilled water, the low-temperature chilled water is sent to a water separator through a chilled water supply pipeline, the low-temperature chilled water enters the water separator through the chilled water supply pipeline and is sent to a terminal device through the water separator for refrigeration, and the low-temperature chilled water and each coil fan of the terminal device are subjected to heat exchange and refrigeration, so that the purpose of cooling is achieved;
2. starting a first dual-working-condition refrigerating unit, a second dual-working-condition refrigerating unit, an ice making unit and a refrigerating water pump set matched with the ice making unit, pressurizing a glycol solution subjected to heat exchange and temperature reduction through a glycol circulating pump set to enter the ice making unit and exchange heat with water flowing out of a cooling cold storage tank so as to cool water in an ice storage tank and obtain heated glycol, pumping the heated glycol back into the first dual-working-condition refrigerating unit and the second dual-working-condition refrigerating unit through the glycol circulating pump set for cooling again, cooling water in the ice storage tank to form sub-cooled water at the temperature of-2 ℃, forming ice slurry through the action of the ice making unit, and flowing into the ice storage tank for storage;
D. combined cooling mode: the method comprises the following steps that a chilled water pump set and one or more refrigerating units are started, the chilled water pump set sends chilled water into an evaporator coil in a base-load refrigerating unit and exchanges heat with a refrigerant of an evaporator in the base-load refrigerating unit to reduce the temperature to form low-temperature chilled water, the low-temperature chilled water is sent to a water distributor through a chilled water supply pipeline, the low-temperature chilled water enters the water distributor through the chilled water supply pipeline and is sent to end equipment through the water distributor to be refrigerated by a user, and exchanges heat with coil fans of the end equipment to refrigerate, so that the purpose of reducing the temperature is achieved;
E. independent cooling mode: and starting a cooling pump, wherein water at 0 ℃ in the cold storage tank flows into the water-water plate type heat exchanger from the lower water distributor through the cooling pump, the chilled water is pumped back into the ice storage tank by the cooling pump after being cooled, and is sprayed onto ice slurry through the upper water distributor of the ice storage tank to melt ice, the chilled water at 12 ℃ flowing out of the water collector exchanges heat in the water-water plate type heat exchanger, is cooled through heat exchange to obtain chilled water at 7 ℃, and the chilled water at 7 ℃ flows to the water separator through the pressurized flow of the chilled water pump group and then flows to the tail end equipment to exchange heat and refrigerate.
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Inventor after: Wu Huizong Inventor after: Gao Junjie Inventor before: Gao Junjie |