CN114279011A - Ice slurry/chilled water binary vacuum cold accumulation air conditioning device - Google Patents
Ice slurry/chilled water binary vacuum cold accumulation air conditioning device Download PDFInfo
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- CN114279011A CN114279011A CN202111574565.7A CN202111574565A CN114279011A CN 114279011 A CN114279011 A CN 114279011A CN 202111574565 A CN202111574565 A CN 202111574565A CN 114279011 A CN114279011 A CN 114279011A
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The invention discloses an ice slurry/chilled water binary vacuum cold accumulation air-conditioning device, and belongs to the technical field of air-conditioning cold accumulation. Comprises an ice making loop, a refrigerating loop and a heat exchange loop which are respectively connected with a cold storage pool; the lower part of the cold accumulation pool is connected with a softened water source connecting pipe; the ice making loop is used for preparing ice slurry in the cold storage tank, the refrigerating loop is used for preparing chilled water in the cold storage tank, and the cold storage tank stores the ice slurry and the chilled water; the heat exchange loop exchanges heat between the ice slurry stored in the cold storage tank and the heat medium in the cold supply tail end connecting pipe. The invention uses the vacuum refrigeration tank to prepare ice slurry and provides cooling water for the water chiller, replaces the traditional ethylene glycol unit ice making system and cooling tower system, and greatly reduces the investment and operation and maintenance cost of the traditional cold accumulation central air conditioning system.
Description
Technical Field
The invention belongs to the technical field of air conditioner cold accumulation, and relates to an ice slurry/chilled water binary vacuum cold accumulation air conditioner.
Background
Due to the industrial development and the improvement of the living standard of people's material culture, the popularization rate of the air conditioner is increased year by year, the power consumption is increased rapidly, the peak power is short, and the peak power cannot be fully applied. Therefore, how to shift peak power demand, "shift peak and fill valley", balance power supply, and improve effective utilization of electric energy becomes a problem that many countries pay attention to solve at present. The aggressiveness of using off-peak power is further driven by the adoption of "time-of-use price" policies, as well as certain motivational policies. This makes the off-peak cold accumulation technology attach importance and develop. One of the most commonly used cold storage air conditioning systems at present is an ice storage system equipped with a glycol unit. The ice storage has the advantages of small capacity and large temperature difference, and can well save the transmission and distribution investment and energy consumption.
However, the glycol unit required for ice cold storage is expensive, and glycol as a traditional secondary refrigerant has strong corrosivity, so that the operation and maintenance costs of the unit and a transmission and distribution system are increased.
Disclosure of Invention
The invention provides an ice slurry/chilled water binary vacuum cold accumulation air-conditioning device, which aims to solve the technical problem that the investment and operation cost of the existing cold accumulation air-conditioning system is high, particularly in high-altitude areas.
The invention is realized by the following technical scheme:
an ice slurry/chilled water binary vacuum cold accumulation air-conditioning device comprises an ice making loop, a refrigerating loop and a heat exchange loop which are respectively connected with a cold accumulation pool;
the lower part of the cold storage pool is connected with a softened water source connecting pipe;
the ice making loop comprises a vacuum refrigeration tank, a water circulating pipe is arranged between the bottom of the cold storage pool and the top of the vacuum refrigeration tank, a water circulating pump and a precooling device are mounted on the water circulating pipe, and a plurality of spraying holes are formed in the tail end of the water circulating pipe and extend into the upper part of the vacuum refrigeration tank; the top of the vacuum refrigeration tank is connected with a vacuum machine through an air exhaust pipeline, the pressure in the vacuum refrigeration tank is kept at 0.60-0.82Kpa, and the temperature is kept at 0-4 ℃; the bottom of the vacuum refrigerating tank is communicated with the top of the cold storage pool through an ice slurry conveying pipe, and an ice slurry pump is installed on the ice slurry conveying pipe;
the refrigeration loop comprises a water chiller capable of providing a cold source, the bottom of the cold storage pool is communicated with the water chiller through a cooling water delivery pipe, the cooling loop of the water chiller further extends into the vacuum refrigeration tank through a bypass cooling pipe and is positioned below the spray hole of the water circulation pipe and above the liquid level of the ice slurry, and the bypass cooling pipe is provided with a cooling pump; the water chiller is communicated with the top of the cold storage pool through a chilled water return pipe, and a freezing pump is mounted on the chilled water return pipe;
the heat exchange loop comprises a first heat exchanger, the bottom of the cold accumulation pool is communicated with the first heat exchanger through a heat exchange pipe and a water return pipe, the water return pipe is also communicated with the cooling water conveying pipe, and a primary pump is mounted on the heat exchange pipe;
the first heat exchanger is further connected with a cooling tail end connecting pipe, and a secondary pump is installed on the cooling tail end connecting pipe.
Furthermore, the vacuum refrigeration tank is internally sequentially divided into a spraying layer, a shunting layer and an ice slurry layer from top to bottom, the distance between the spraying layer and the ice slurry layer is more than or equal to 50cm, the spraying layer is communicated with the tail end of the water circulation pipe, cooling water forms ice slurry in the ice slurry layer, and the ice slurry layer is communicated with the ice slurry conveying pipe.
Further, the vacuum machine is electrically connected with a vacuum pressure switch, and the vacuum pressure switch is fixedly connected to the inner side wall of the vacuum refrigeration tank.
Furthermore, the precooling device comprises a second heat exchanger, a condensing compressor and a precooling pipe, and two ends of the precooling pipe are communicated with the condensing compressor.
Furthermore, a plurality of guide plates are arranged below the water circulating pipe spraying holes and above the ice slurry liquid level in the vacuum refrigerating tank, and the bypass cooling pipe penetrates through the guide plates.
Furthermore, an atomizing nozzle is arranged in a spraying hole on the water circulating pipe.
Further, a mechanical stirrer is installed at the bottom of the vacuum refrigeration tank.
Furthermore, a three-way pipe is arranged at the joint of the water return pipe and the cooling water conveying pipe.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the refrigeration system provides a cold source for the cold accumulation tank through the ice making loop and the refrigeration loop, and the cooling pipe in the refrigeration loop can also perform auxiliary heat exchange in the vacuum refrigeration tank, so that the refrigeration system is beneficial to fully utilizing the low-temperature environment in the vacuum refrigeration tank to prepare chilled water and improving the refrigeration efficiency; in the plateau area, the pressure is low, and when the vacuum refrigeration tank is vacuumized, the energy consumption of the vacuum machine can be reduced, so that the operation cost can be effectively saved; meanwhile, water flowing out of the second heat exchanger can flow into the cooling water conveying pipe and then flows into the cold storage tank after being refrigerated by the water chiller, ice slurry in the cold storage tank cannot be damaged, and the cold source can be stably output.
2. Compared with the ice cold accumulation adopted by a glycol unit, the ice slurry cold accumulation adopted by the invention has the advantages that the heat exchange fluid is water, the temperature difference between water supply and return water is 10 ℃, and the traditional ice cold accumulation unit has smaller effective volume inside and has the same cold accumulation density (about 40-50 KW/m)3) In the case of (3), the volume is only 1/3 of the ice slurry cold storage tank with the same volume, so the cold storage capacity of the ice slurry cold storage is stronger; the ice slurry cold accumulation is simple and convenient to operate and easy to operate, the cold release speed and the size can be determined according to the cold load, and the ice slurry can be supplied immediately as needed without time delay. The traditional ice cold accumulation needs ice melting, so the cold release speed and size are limited, and the normal cold supply can be realized only after about 30 minutes of time delay. The ice slurry cold accumulation can well save the transmission and distribution investment and the energy consumption. Meanwhile, the investment and operation and maintenance costs of the units and the transmission and distribution system are reduced without the need of a glycol unit.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1. a cold storage tank; 2. a water circulation pipe; 3. a water circulation pump; 4. a second heat exchanger; 5. a condensing compressor; 6. a pre-cooling tube; 7. a vacuum refrigeration tank; 71. a spray layer; 711. the tail end of a water circulating pipe; 712. an atomizing spray head; 72. a shunt layer; 73. a layer of ice slurry; 8. an ice slurry conveying pipe; 9. an ice slurry pump; 10. a vacuum machine; 11. an air extraction pipeline; 12. a water chiller; 13. a cooling water delivery pipe; 14. a chilled water return pipe; 15. a freeze pump; 16. a bypass cooling tube; 17. a cooling pump; 18. a first heat exchanger; 19. a heat exchange pipe; 20. a primary pump; 21. a cooling end connection pipe; 22. a secondary pump; 23. a water return pipe; 24. a softened water source connecting pipe; 25. a mechanical stirrer; 26. a baffle.
Detailed Description
The present invention will now be described in further detail with reference to the following examples, which are intended to be illustrative, but not limiting, of the invention.
As shown in fig. 1, the ice slurry/chilled water binary vacuum cold accumulation air conditioning device provided by the invention comprises an ice making loop, a refrigerating loop and a heat exchange loop which are respectively connected with a cold accumulation pool 1;
the lower part of the cold storage pool 1 is connected with a softened water source connecting pipe 24;
the ice making loop comprises a vacuum refrigerating tank 7, a water circulating pipe 2 is arranged between the bottom of the cold storage pool 1 and the top of the vacuum refrigerating tank 7, a water circulating pump 3 and a precooling device are mounted on the water circulating pipe 2, and a plurality of spraying holes are formed in the tail end 711 of the water circulating pipe and extend into the upper part of the vacuum refrigerating tank 7; the top of the vacuum refrigeration tank 7 is connected with a vacuum machine 10 through an air exhaust pipeline 11, the pressure in the vacuum refrigeration tank 7 is kept at 0.60-0.82Kpa, and the temperature is kept at 0-4 ℃; the bottom of the vacuum refrigeration tank 7 is communicated with the top of the cold storage pool 1 through an ice slurry conveying pipe 8, and an ice slurry pump 9 is installed on the ice slurry conveying pipe 8;
the refrigeration loop comprises a water chiller 12 capable of providing a cold source, the bottom of the cold storage pool 1 is communicated with the water chiller 12 through a cooling water delivery pipe 13, the cooling loop of the water chiller 12 further extends into the vacuum refrigeration tank 7 through a bypass cooling pipe 16 and is positioned below a spray hole of the water circulation pipe 2 and above the liquid level of ice slurry, and the bypass cooling pipe 16 is provided with a cooling pump 17; the water chiller 12 is communicated with the top of the cold storage pool 1 through a chilled water return pipe 14, and a freezing pump 15 is installed on the chilled water return pipe 14;
the heat exchange loop comprises a first heat exchanger 18, the bottom of the cold accumulation pool 1 is communicated with the first heat exchanger 18 through a heat exchange tube 19 and a water return tube 23, the water return tube 23 is also communicated with the cooling water conveying pipe 13, and a primary pump 20 is installed on the heat exchange tube 19;
the first heat exchanger 18 is further connected with a cooling end connecting pipe 21, and a secondary pump 22 is installed on the cooling end connecting pipe 21.
As shown in fig. 1, the interior of the vacuum refrigeration tank 7 is sequentially divided into a spraying layer 71, a splitting layer 72 and an ice slurry layer 73 from top to bottom, the distance between the spraying layer 71 and the ice slurry layer 73 is greater than or equal to 50cm, the spraying layer 71 is communicated with the tail end 711 of the water circulation pipe, cooling water forms ice slurry in the ice slurry layer 73, and the ice slurry layer 73 is communicated with the ice slurry conveying pipe 8.
As shown in fig. 1, the vacuum machine 10 is electrically connected to a vacuum pressure switch, the vacuum pressure switch is fixedly connected to the inner side wall of the vacuum refrigeration tank 7, and a detection element in the vacuum pressure switch detects vacuum pressure in the vacuum refrigeration tank 7 and controls the vacuum machine 10 to perform corresponding actions.
As shown in fig. 1, the precooling apparatus includes a second heat exchanger 4, a condensing compressor 5 and a precooling pipe 6, both ends of the precooling pipe 6 are communicated with the condensing compressor 5, the condensing compressor 5 performs refrigeration and exchanges heat with water in the water circulation pipe 2 through the precooling pipe 6, the temperature of the water in the water circulation pipe 2 entering the vacuum refrigeration tank 7 is reduced, and the vacuum refrigeration tank 7 can be cooled and three-phase separated in the entering vacuum refrigeration tank 7.
As shown in fig. 1, a plurality of baffles 26 are installed below the spray holes of the water circulation pipe 2 and above the liquid level of the ice slurry in the vacuum refrigeration tank 7, and the bypass cooling pipe 16 passes through the baffles 26, so that the baffles 26 facilitate to increase the contact area between the bypass cooling pipe 16 and the ice slurry, and help to utilize the residual cold.
As shown in fig. 1, an atomizing nozzle 712 is installed in the spray hole of the water circulation pipe 2, and the atomizing nozzle 712 helps the spray hole of the tail end 711 of the water circulation pipe to atomize water, thereby conveniently and rapidly realizing three-phase separation.
As shown in fig. 1, a mechanical stirrer 25 is installed at the bottom of the vacuum refrigeration tank 7, and the mechanical stirrer 25 helps to prevent ice water from being layered in the ice slurry layer 73 at the bottom of the vacuum refrigeration tank 7, and helps to improve the conveying efficiency of the ice slurry pump 9.
As shown in fig. 1, a three-way pipe is installed at the connection between the water return pipe 23 and the cooling water delivery pipe 13.
The working principle is as follows: when the ice making device works, ice slurry is prepared in the cold storage pool 1 of the ice making loop, chilled water is prepared in the cold storage pool 1 of the refrigeration loop, and the ice slurry and the chilled water are stored in the cold storage pool 1; in an ice making loop, a vacuum machine 10 vacuumizes the interior of a vacuum refrigeration tank 7 through an air exhaust pipeline 11, a vacuum pressure switch detects the pressure intensity in the vacuum refrigeration tank 7 and controls the vacuum machine 10 to work, so that a vacuum environment can be formed in the vacuum refrigeration tank 7; water in the cold storage pool 1 flows into the second heat exchanger 4 through the water circulating pipe 2 by the water circulating pump 3 to exchange heat with chilled water prepared by the condensing compressor 5, the water after heat exchange is sprayed in an atomizing spray head 712 at the tail end 711 of the water circulating pipe in an atomizing manner, the temperature in the vacuum refrigerating tank 7 can be reduced, ice slurry is formed in a split flow path after a three-phase separation condition is achieved, the ice slurry flows into an ice slurry layer 73 at the bottom of the vacuum refrigerating tank 7 by a guide plate 26, and the ice slurry is guided into the cold storage pool 1 by the ice slurry conveying pipe 8 by the ice slurry pump 9; in the refrigeration loop, water in the cold storage pool 1 enters a water chiller 12 for refrigeration through a cooling water delivery pipe 13, and is guided into the cold storage pool 1 through a chilled water return pipe 14 by a refrigeration pump 15; part of cooling water is pumped into the bypass cooling pipe 16 by the cooling pump 17, and the residual cooling refrigeration freezing water is utilized in the vacuum refrigeration tank 7; in the heat exchange loop, chilled water in the cold storage pool 1 flows into the first heat exchanger 18 through the heat exchange pipe 19 under the action of the primary pump 20, flows into the cooling water conveying pipe 13 through the water return pipe 23 after heat exchange is finished, flows into the chilled water in the water chiller 12 and flows into the cold storage pool 1 through the chilled water return pipe 14, and the secondary pump 22 pumps a heat medium in the cold supply tail end connecting pipe 21 into the first heat exchanger 18 and flows into the cold supply tail end through the cold supply tail end connecting pipe 21 after heat exchange with the chilled water.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiments given above are preferable examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical characteristics of the technical scheme of the invention by a person skilled in the art belong to the protection scope of the invention.
Claims (8)
1. An ice slurry/chilled water binary vacuum cold accumulation air-conditioning device is characterized by comprising an ice making loop, a refrigerating loop and a heat exchange loop which are respectively connected with a cold accumulation pool (1);
the lower part of the cold storage pool (1) is connected with a softened water source connecting pipe (24);
the ice making loop comprises a vacuum refrigerating tank (7), a water circulating pipe (2) is arranged between the bottom of the cold storage pool (1) and the top of the vacuum refrigerating tank (7), a water circulating pump (3) and a precooling device are mounted on the water circulating pipe (2), and a plurality of spraying holes are formed in the tail end (711) of the water circulating pipe and extend into the upper part of the vacuum refrigerating tank (7); the top of the vacuum refrigeration tank (7) is connected with a vacuum machine (10) through an air exhaust pipeline (11), the pressure in the vacuum refrigeration tank (7) is kept at 0.60-0.82Kpa, and the temperature is kept at 0-4 ℃; the bottom of the vacuum refrigerating tank (7) is communicated with the top of the cold storage pool (1) through an ice slurry conveying pipe (8), and an ice slurry pump (9) is installed on the ice slurry conveying pipe (8);
the refrigeration loop comprises a water chiller (12) capable of providing a cold source, the bottom of the cold storage pool (1) is communicated with the water chiller (12) through a cooling water conveying pipe (13), the cooling loop of the water chiller (12) further extends into the vacuum refrigeration tank (7) through a bypass cooling pipe (16) and is positioned below a spraying hole of the water circulating pipe (2) and above the liquid level of ice slurry, and a cooling pump (17) is installed on the bypass cooling pipe (16); the water chiller (12) is communicated with the top of the cold storage pool (1) through a chilled water return pipe (14), and a refrigerating pump (15) is mounted on the chilled water return pipe (14);
the heat exchange loop comprises a second heat exchanger (4), the bottom of the cold storage pool (1) is communicated with the first heat exchanger (18) through a heat exchange pipe (19) and a water return pipe (23), the water return pipe (23) is also communicated with the cooling water conveying pipe (13), and a primary pump (20) is mounted on the heat exchange pipe (19);
the first heat exchanger (18) is further connected with a cooling tail end connecting pipe (21), and a secondary pump (22) is installed on the cooling tail end connecting pipe (21).
2. The ice slurry/chilled water binary vacuum cold accumulation air conditioning device as claimed in claim 1, wherein the vacuum refrigeration tank (7) is internally divided into a spraying layer (71), a flow dividing layer (72) and an ice slurry layer (73) from top to bottom in sequence, the distance between the spraying layer (71) and the ice slurry layer (73) is more than or equal to 50cm, the spraying layer (71) is communicated with the tail end (711) of the water circulation pipe, cooling water forms ice slurry in the ice slurry layer (73), and the ice slurry layer (73) is communicated with the ice slurry conveying pipe (8).
3. The ice slurry/chilled water binary vacuum cold accumulation air conditioning device as claimed in claim 1, wherein the vacuum machine (10) is electrically connected with a vacuum pressure switch, and the vacuum pressure switch is fixedly connected with the inner side wall of the vacuum refrigeration tank (7).
4. The ice slurry/chilled water binary vacuum cold accumulation air-conditioning device according to claim 1, wherein the pre-cooling device comprises a second heat exchanger (4), a condensing compressor (5) and a pre-cooling pipe (6), and both ends of the pre-cooling pipe (6) are communicated with the condensing compressor (5).
5. The ice slurry/chilled water binary vacuum cold accumulation air conditioning device as claimed in claim 1, characterized in that a plurality of flow deflectors (26) are installed in the vacuum refrigeration tank (7) below the spray holes of the water circulation pipe (2) and above the liquid level of the ice slurry, and the bypass cooling pipe (16) passes through the flow deflectors (26).
6. The ice slurry/chilled water binary vacuum cold accumulation air-conditioning device as claimed in claim 1, wherein an atomizing nozzle (712) is installed in a spray hole on the water circulation pipe (2).
7. An ice slurry/chilled water binary vacuum cold accumulation air conditioning device as claimed in claim 1, characterized in that the bottom of the vacuum refrigerating tank (7) is provided with a mechanical stirrer (25).
8. The ice slurry/chilled water binary vacuum cold accumulation air conditioning device as claimed in claim 1, wherein a tee pipe is installed at the joint of the water return pipe (23) and the cooling water delivery pipe (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111574565.7A CN114279011A (en) | 2021-12-21 | 2021-12-21 | Ice slurry/chilled water binary vacuum cold accumulation air conditioning device |
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| CN202111574565.7A CN114279011A (en) | 2021-12-21 | 2021-12-21 | Ice slurry/chilled water binary vacuum cold accumulation air conditioning device |
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| CN114279011A true CN114279011A (en) | 2022-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144064A (en) * | 2017-07-18 | 2017-09-08 | 成都中装能源科技有限公司 | binary ice ice storage tank |
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2021
- 2021-12-21 CN CN202111574565.7A patent/CN114279011A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144064A (en) * | 2017-07-18 | 2017-09-08 | 成都中装能源科技有限公司 | binary ice ice storage tank |
| CN107144064B (en) * | 2017-07-18 | 2023-06-23 | 成都中装能源科技有限公司 | Binary ice storage tank |
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