CN107401862B - Cold accumulation type condensation efficient central air-conditioning refrigeration system - Google Patents
Cold accumulation type condensation efficient central air-conditioning refrigeration system Download PDFInfo
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- CN107401862B CN107401862B CN201710835757.6A CN201710835757A CN107401862B CN 107401862 B CN107401862 B CN 107401862B CN 201710835757 A CN201710835757 A CN 201710835757A CN 107401862 B CN107401862 B CN 107401862B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a cold accumulation type condensation efficient central air conditioning refrigeration system which comprises a refrigeration loop, a cooling water pump (6), a cooling tower (7), a cold accumulation water pool (8), a cooling coil (9), cold accumulation cooling water (10), a water outlet temperature sensor (11), a cooling coil liquid inlet electromagnetic valve (12), a cooling tower water inlet electromagnetic valve (13), a cooling tower water outlet electromagnetic valve (14), a cold accumulation conversion electromagnetic valve (15), a communication pipe (16) and a water pool temperature sensor (17), wherein the refrigeration loop is at least composed of a compressor (1), a condenser (2), a liquid accumulator (3), a throttling device (4) and an evaporator (5). The invention designs the cooling water pool of the traditional refrigeration system as a cold accumulation water pool (8), the cooling coil (9) is arranged in the cold accumulation water pool (8), cold accumulation is carried out at night in a low electricity price period, and the low-temperature cold accumulation cooling water (10) is cooled to the condenser (2) when the air-conditioning refrigeration system operates in daytime, so that the condensation temperature of the refrigeration system is reduced, the efficiency of the refrigeration system is improved, and the effects of saving energy, reducing the operation cost and simplifying the system are achieved.
Description
Technical Field
The invention relates to a refrigeration system, in particular to a cold accumulation type condensation efficient central air-conditioning refrigeration system, and belongs to the technical field of refrigeration.
Background
In recent years, the cold accumulation technology is widely applied in the field of central air conditioners, the load of a power grid can be balanced, the capacity of a power distribution unit and a refrigerating unit is reduced, the operation efficiency is improved, and the operation cost is reduced. The electric refrigerating unit is adopted for refrigeration at night in low electricity price time (simultaneously, the time when the load of the air conditioner is very low), the water is stored in a special water tank for cooling so as to store cold energy, the refrigerating unit is stopped at daytime in high electricity price time (simultaneously, the time when the load of the air conditioner is high), and the cold energy in the water tank is directly provided for an air conditioner terminal device of a required room to release to meet the requirement. The water cold accumulation central air-conditioning system saves the electric power cost and the electric power equipment cost, but the water cold accumulation central air-conditioning system needs to be equipped with complicated cold accumulation equipment besides the common refrigeration system and the air-conditioning equipment, the cold loss is serious, the air-conditioning system is complicated, the occupied area is large, and the refrigeration efficiency is low. Therefore, the cooling loop which directly uses the low-temperature cold accumulation water for the refrigeration system can be considered, the efficiency of the refrigeration system is improved, the system is simplified, and a central air-conditioning refrigeration system which uses the cold accumulation technology for the cooling water loop of the refrigeration system is not available at present.
Disclosure of Invention
The invention aims to solve the technical problem of providing a cold accumulation type condensation efficient central air-conditioning refrigeration system, wherein a cooling water tank of the traditional refrigeration system is designed into a cold accumulation water tank, a cooling coil is arranged in the cold accumulation water tank, cold accumulation is carried out at night in a low electricity price period, the air-conditioning refrigeration system cools a condenser by using low-temperature cold accumulation cooling water during the operation in daytime, the condensation temperature of the refrigeration system is reduced, the efficiency of the refrigeration system is improved, and therefore, the effects of saving energy, reducing the operation cost and simplifying the system are achieved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: cold-storage condensation's high-efficient central air conditioning refrigerating system, including the refrigeration circuit who comprises compressor (1), condenser (2), reservoir (3), throttling arrangement (4), evaporimeter (5) at least, its characterized in that: the system also comprises a cooling water pump (6), a cooling tower (7), a cold accumulation water pool (8), a cooling coil (9), cold accumulation cooling water (10), a water outlet temperature sensor (11), a cooling coil liquid inlet electromagnetic valve (12), a cooling tower water inlet electromagnetic valve (13), a cooling tower water outlet electromagnetic valve (14), a cold accumulation conversion electromagnetic valve (15), a communicating pipe (16) and a water pool temperature sensor (17); the water outlet pipe of the cold accumulation water tank (8) is connected with the water inlet pipe of the cooling tower (7), the water outlet pipe of the cooling tower (7) is connected with the water inlet pipe of the cooling water pump (6), the water outlet pipe of the cooling water pump (6) is connected with the water side inlet of the condenser (2), and the water side outlet of the condenser (2) is connected with the water inlet pipe of the cold accumulation water tank (8); one end of the communicating pipe (16) is connected with a water inlet pipe of the cooling water pump (6), and the other end is connected with a water outlet pipe of the cold storage water tank (8); a cooling coil (9) is arranged in the cold accumulation water tank (8), a liquid inlet pipe of the cooling coil (9) is connected with the throttling device (4), an air return pipe is converged with an outlet of the evaporator (5), and a liquid inlet pipe of the cooling coil (9) is provided with a cooling coil liquid inlet electromagnetic valve (12); a cooling tower water inlet electromagnetic valve (13) is arranged on a cooling tower (7) water inlet pipe, a cooling tower water outlet electromagnetic valve (14) is arranged on a cooling tower (7) water outlet pipe, and a cold accumulation conversion electromagnetic valve (15) is arranged on a communicating pipe (16); a pool temperature sensor (17) is arranged in the cold accumulation pool (8), and the pool temperature sensor (17) is connected with the cooling coil liquid inlet electromagnetic valve (12) through a control line; an outlet water temperature sensor (11) is arranged on an outlet pipe of the cold accumulation water tank (8), and the outlet water temperature sensor (11) is connected with a power supply of the cooling tower (7), a water inlet electromagnetic valve (13) of the cooling tower, a water outlet electromagnetic valve (14) of the cooling tower and a cold accumulation conversion electromagnetic valve (15) through control lines.
Preferably, the position of the cold storage water tank (8) is lower than the cooling tower (7), the cold storage water tank is of a stainless steel or reinforced concrete structure, a waterproof layer is arranged outside the cold storage water tank, a heat insulation layer is arranged outside the waterproof layer, and the heat insulation layer is made of polyurethane foam materials or rock wool or glass fiber.
Preferably, the cold storage water tank (8) is completely filled with the cold storage cooling water (10).
Adopt the produced beneficial effect of above-mentioned scheme to lie in: the cooling water tank of the traditional refrigeration system is designed into a cold storage water tank, the cooling coil is arranged in the cold storage water tank, cold storage is carried out at night in a low electricity price period, the low-temperature cold storage cooling water is cooled by the condenser when the air-conditioning refrigeration system operates in daytime, the condensation temperature of the refrigeration system is reduced, the efficiency of the refrigeration system is improved, and therefore the effects of saving energy, reducing the operation cost and simplifying the system are achieved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a system diagram of the present invention.
Wherein, 1, a compressor, 2, a condenser, 3, a liquid storage device, 4, a throttling device, 5, an evaporator, 6, a cooling water pump, 7, a cooling tower, 8, a cold accumulation water pool, 9, a cooling coil, 10 and cold accumulation cooling water, 11, an outlet water temperature sensor, 12, a cooling coil liquid inlet electromagnetic valve, 13, a cooling tower water inlet electromagnetic valve, 14, a cooling tower outlet electromagnetic valve, 15, a cold accumulation conversion electromagnetic valve, 16, a communication pipe, 17 and a pool temperature sensor.
Detailed Description
Referring to fig. 1, the invention comprises a refrigeration loop at least composed of a compressor (1), a condenser (2), a liquid storage device (3), a throttling device (4) and an evaporator (5), and also comprises a cooling water pump (6), a cooling tower (7), a cold storage water tank (8), a cooling coil (9), cold storage cooling water (10), a water outlet temperature sensor (11), a cooling coil liquid inlet electromagnetic valve (12), a cooling tower water inlet electromagnetic valve (13), a cooling tower water outlet electromagnetic valve (14), a cold storage conversion electromagnetic valve (15), a communicating pipe (16) and a water tank temperature sensor (17); the water outlet pipe of the cold accumulation water tank (8) is connected with the water inlet pipe of the cooling tower (7), the water outlet pipe of the cooling tower (7) is connected with the water inlet pipe of the cooling water pump (6), the water outlet pipe of the cooling water pump (6) is connected with the water side inlet of the condenser (2), and the water side outlet of the condenser (2) is connected with the water inlet pipe of the cold accumulation water tank (8); one end of the communicating pipe (16) is connected with a water inlet pipe of the cooling water pump (6), and the other end is connected with a water outlet pipe of the cold storage water tank (8); a cooling coil (9) is arranged in the cold accumulation water tank (8), a liquid inlet pipe of the cooling coil (9) is connected with the throttling device (4), an air return pipe is converged with an outlet of the evaporator (5), and a cooling coil liquid inlet electromagnetic valve (12) is arranged on the liquid inlet pipe of the cooling coil (9); a cooling tower water inlet electromagnetic valve (13) is arranged on a cooling tower (7) water inlet pipe, a cooling tower water outlet electromagnetic valve (14) is arranged on a cooling tower (7) water outlet pipe, and a cold accumulation conversion electromagnetic valve (15) is arranged on a communicating pipe (16); a pool temperature sensor (17) is arranged in the cold accumulation pool (8), and the pool temperature sensor (17) is connected with the cooling coil liquid inlet electromagnetic valve (12) through a control line; a water outlet temperature sensor (11) is arranged on a water outlet pipe of the cold accumulation water tank (8), and the water outlet temperature sensor (11) is connected with a power supply of the cooling tower (7), a water inlet electromagnetic valve (13) of the cooling tower, a water outlet electromagnetic valve (14) of the cooling tower and a cold accumulation conversion electromagnetic valve (15) through control lines; the cold accumulation water tank (8) is lower than the cooling tower (7), is of a stainless steel or reinforced concrete structure, is externally provided with a waterproof layer, is externally provided with a heat insulation layer, and adopts polyurethane foaming material or rock wool or glass fiber; the cold accumulation water tank (8) is fully filled with cold accumulation cooling water (10).
The refrigeration loop consists of a compressor (1), a condenser (2), a liquid storage device (3), a throttling device (4) and an evaporator (5), and can realize refrigeration circulation; a cooling water loop consisting of the condenser (2), a cold accumulation water tank (8), a cooling tower (7), a cooling water pump (6) and a communicating pipe (16) can realize cooling circulation of the condenser; the cold accumulation loop is composed of a compressor (1), a condenser (2), a liquid accumulator (3), a throttling device (4) and a cooling coil (9), and cold accumulation refrigeration circulation can be realized.
The cold storage cooling water (10) in the cold storage water tank (8) is cold storage water and cooling water; the cooling coil (9) is arranged in the cold accumulation water tank (8), is connected with the evaporator (5) in parallel in a refrigeration loop, and operates in a refrigeration cycle, the cooling coil (9) cools and accumulates cold for cold accumulation cooling water (10) in the cold accumulation water tank (8), and the cooled cold accumulation cooling water (10) is used for cooling the condenser (2); because the cooling water temperature is inversely proportional to the refrigeration efficiency, the lower the cooling water temperature is, the higher the refrigeration efficiency is, and therefore, the refrigeration efficiency of the system can be greatly improved by using the cooled cold accumulation cooling water (10) to cool the condenser (2); and because the electricity price is low at night and high in daytime, the cold accumulation is carried out at night, and the system operation cost can be reduced.
A water outlet temperature sensor (11) is arranged on a water outlet pipe of the cold storage water tank (8) and used for sensing the water outlet temperature of the cold storage water tank (8), and is linked with a power supply of the cooling tower (7), a cooling tower water inlet electromagnetic valve (13), a cooling tower water outlet electromagnetic valve (14) and a cold storage conversion electromagnetic valve (15), wherein the cooling tower water inlet electromagnetic valve (13), the cooling tower water outlet electromagnetic valve (14) and the cold storage conversion electromagnetic valve (15) are used for controlling whether cold storage cooling water (10) flows through the cooling tower (7) for cooling; when the system operates, when the temperature of the outlet water of the cold storage water tank (8) is lower than 30 ℃, the outlet water does not need to be cooled by the cooling tower (7), and the outlet water can be directly used for cooling the condenser (2), at the moment, the power supply of the cooling tower (7), the water inlet electromagnetic valve (13) of the cooling tower and the water outlet electromagnetic valve (14) of the cooling tower are closed, the cold storage conversion electromagnetic valve (15) is opened, the cooling tower (7) stops operating, the cold storage cooling water (10) flows into the condenser (2) through the communicating pipe (16) and the cooling water pump (6), when the temperature of the outlet water of the cold storage water tank (8) is higher than 30 ℃, the outlet water needs to be cooled by the cooling tower (7), at the moment, the power supply of the cooling tower (7), the water inlet electromagnetic valve (13) of the cooling tower and the water outlet electromagnetic valve (14) of the cooling tower are opened, the cold storage conversion electromagnetic valve (15) is closed, the cooling tower (7) operates, and the cold storage cooling water (10) flows into the condenser (2) through the cooling water pump (6) after being cooled by the cooling tower (7).
Be equipped with pond temperature sensor (17) in cold-storage pond (8), a temperature for feeling cold-storage cooling water (10) in the pond, with cooling coil feed liquor solenoid valve (12) linkage on cooling coil (9) feed liquor pipe, when the temperature is less than during 10 ℃ or when not needing the cold-storage when the temperature, thereby cooling coil feed liquor solenoid valve (12) are closed and are stopped the cold-storage, when the temperature is higher than upper limit temperature 15 ℃ or when needing the cold-storage at night, thereby cooling coil feed liquor solenoid valve (12) are opened and are carried out the cold-storage.
Specifically, when the night is in a low electricity price period, the cold accumulation refrigeration cycle operates, the cooling coil (9) works, the cold accumulation cooling water (10) is cooled for cold accumulation, the cold accumulation refrigeration cycle stops operating until the temperature of the cold accumulation cooling water (10) is reduced to the lower limit of the design temperature of 10 ℃, and the cold accumulation is finished; when the refrigeration cycle operates in daytime on the next day, low-temperature cold accumulation cooling water (10) from a cold accumulation water pool (8) flows into the condenser (2) through a communication pipe (16) and a cooling water pump (6) (at the moment, a power supply of the cooling tower (7), a water inlet electromagnetic valve (13) of the cooling tower and a water outlet electromagnetic valve (14) of the cooling tower are closed, a cold accumulation conversion electromagnetic valve (15) is opened, the cold accumulation cooling water (10) does not flow through the cooling tower (7), the cooling tower (7) does not work, the condenser (2) is cooled, the condensation temperature is reduced, the refrigeration efficiency is improved, at the moment, a liquid inlet electromagnetic valve (12) of the cooling coil is closed, and the cold accumulation refrigeration cycle does not operate; during the operation, the temperature of the cold accumulation cooling water (10) rises, when the temperature of the cold accumulation cooling water (10) rises to 30 ℃, the cold accumulation conversion electromagnetic valve (15) on the communicating pipe (16) is closed, the power supply of the cooling tower (7), the cooling tower water inlet electromagnetic valve (13) and the cooling tower water outlet electromagnetic valve (14) are opened, the cooling tower (7) operates, the cold accumulation cooling water (10) coming out of the cold accumulation water pool (8) firstly flows through the cooling tower (7), is cooled by the cooling tower (7) and then enters the condenser (2) through the cooling water pump (6) for cooling.
The cold accumulation water tank (10) designed in the invention is also a cooling water tank, thereby simplifying the system; when the system is operated at night with low electricity price, the system carries out cold accumulation, and when the air-conditioning refrigeration system is operated at daytime, the condenser (2) is cooled by the low-temperature cold accumulation cooling water (10), so that the condensation temperature of the refrigeration system is reduced, the efficiency of the refrigeration system is improved, the energy is saved, and the operating cost is reduced.
Claims (3)
1. The high-efficient central air conditioning refrigerating system of cold accumulation formula condensation, including the refrigeration circuit who comprises compressor (1), condenser (2), reservoir (3), throttling arrangement (4), evaporimeter (5) at least, its characterized in that: the system also comprises a cooling water pump (6), a cooling tower (7), a cold accumulation water pool (8), a cooling coil (9), cold accumulation cooling water (10), a water outlet temperature sensor (11), a cooling coil liquid inlet electromagnetic valve (12), a cooling tower water inlet electromagnetic valve (13), a cooling tower water outlet electromagnetic valve (14), a cold accumulation conversion electromagnetic valve (15), a communicating pipe (16) and a water pool temperature sensor (17); the water outlet pipe of the cold accumulation water tank (8) is connected with the water inlet pipe of the cooling tower (7), the water outlet pipe of the cooling tower (7) is connected with the water inlet pipe of the cooling water pump (6), the water outlet pipe of the cooling water pump (6) is connected with the water side inlet of the condenser (2), and the water side outlet of the condenser (2) is connected with the water inlet pipe of the cold accumulation water tank (8); one end of the communicating pipe (16) is connected with a water inlet pipe of the cooling water pump (6), and the other end is connected with a water outlet pipe of the cold storage water tank (8); a cooling coil (9) is arranged in the cold accumulation water tank (8), a liquid inlet pipe of the cooling coil (9) is connected with the throttling device (4), an air return pipe is converged with an outlet of the evaporator (5), and a liquid inlet pipe of the cooling coil (9) is provided with a cooling coil liquid inlet electromagnetic valve (12); a cooling tower water inlet electromagnetic valve (13) is arranged on a cooling tower (7) water inlet pipe, a cooling tower water outlet electromagnetic valve (14) is arranged on a cooling tower (7) water outlet pipe, and a cold accumulation conversion electromagnetic valve (15) is arranged on a communicating pipe (16); a pool temperature sensor (17) is arranged in the cold accumulation pool (8), and the pool temperature sensor (17) is connected with the cooling coil liquid inlet electromagnetic valve (12) through a control line; an outlet water temperature sensor (11) is arranged on an outlet pipe of the cold accumulation water tank (8), and the outlet water temperature sensor (11) is connected with a power supply of the cooling tower (7), a water inlet electromagnetic valve (13) of the cooling tower, a water outlet electromagnetic valve (14) of the cooling tower and a cold accumulation conversion electromagnetic valve (15) through control lines.
2. The cold accumulation type condensation high-efficiency central air-conditioning refrigeration system as claimed in claim 1, characterized in that the cold accumulation water tank (8) is positioned lower than the cooling tower (7) and is of a stainless steel or reinforced concrete structure, a waterproof layer is arranged outside the cold accumulation water tank, a heat insulation layer is arranged outside the waterproof layer, and the heat insulation layer is made of polyurethane foam material or rock wool or glass fiber.
3. Cold-storage condensing high-efficiency central air-conditioning refrigeration system according to claim 1 or 2, characterized in that the cold-storage water pool (8) is completely filled with the cold-storage cooling water (10).
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| CN201710835757.6A CN107401862B (en) | 2017-09-16 | 2017-09-16 | Cold accumulation type condensation efficient central air-conditioning refrigeration system |
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| CN201710835757.6A CN107401862B (en) | 2017-09-16 | 2017-09-16 | Cold accumulation type condensation efficient central air-conditioning refrigeration system |
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| CN107401862B true CN107401862B (en) | 2022-11-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109140633A (en) * | 2018-09-29 | 2019-01-04 | 王工 | Water cold accumulation device |
| CN112665049A (en) * | 2020-12-28 | 2021-04-16 | 无锡市工业设备安装有限公司 | Novel efficient chilled water storage operation method |
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| CN107401862A (en) | 2017-11-28 |
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