Integrated dual-system cold source

Abstract

The utility model relates to an integrated dual-system cold source, which comprises a cooling water circulation loop, a cooling water pump, a cooling water pipeline and a cooling tower heat exchange coil, the spraying water loop comprises a spraying head and is used for spraying the cold tower heat exchange coil pipe; the steam compression type refrigerating circuit comprises a compressor, a condenser, an evaporator and an expansion valve; the condenser loop is connected to the cooling water pipeline in parallel, is connected with the condenser and comprises a high-pressure regulating valve; the chilled water circulation loop comprises a chilled water pump and a chilled water pipeline, the chilled water pipeline is connected with the evaporator and connected to the cooling water pipeline in parallel through a bypass pipeline, and a bypass valve is arranged on the bypass pipeline. A chilled water system and a cooling water system are integrally designed, the product integration degree is high, the occupied area is small, and installation is convenient and fast. A cooling water system and a chilled water system are organically combined, so that the annual energy efficiency ratio of the whole cooling system is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid cooling technical field, concretely relates to an integrated double-system cold source. BACKGROUND

[0002] Compared with traditional air cooling, liquid cooling can effectively reduce power consumption for cooling and operating noise. Compared with other liquid cooling methods, cold plate liquid cooling has significant advantages in terms of modification degree of data center and server architecture, maturity of industrial chain, convenience of component replacement and operation and maintenance, initial investment, and has a higher market share. Most cold plate liquid cooling systems use two independent cooling systems. The liquid cooling system provides water at a temperature of about 35℃, and a closed cooling tower is used as the liquid cooling water source. The chilled water air conditioning system provides water at a temperature of about 25℃, and a water chiller is used as the chilled water source. The ratio of air cooling to liquid cooling is about 3:7. The water chiller is mainly used to ensure that the chilled water air conditioning system can provide 25℃ water supply in high temperature conditions in summer. In addition, the closed cooling tower can provide 25℃ water supply most of the year. At low ambient temperature, the energy efficiency of the closed cooling tower is much higher than that of the water chiller. The existing chilled water system uses a water chiller for cooling all year round, and fails to fully utilize the ultra-high energy efficiency ratio of the closed cooling tower. Two independent refrigeration systems are complex to install, have a large footprint, and are difficult to manage and maintain. SUMMARY

[0003] The utility model aims at providing an integrated double-system cold source to solve the problem of using two independent cooling systems in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The integrated double-system cold source comprises:

[0006] The cooling water circulation loop comprises a cooling water pump, a cooling water pipeline and a cooling tower heat exchange coil.

[0007] The spray water circuit comprises a spray head for spraying the cooling tower heat exchange coil.

[0008] The vapor compression refrigeration circuit comprises a compressor, a condenser, an evaporator and an expansion valve.

[0009] The condenser circuit is connected to the condenser in parallel on the cooling water pipeline and comprises a high-pressure regulating valve.

[0010] The chilled water circulation loop comprises a chilled water pump and a chilled water pipeline. The chilled water pipeline is connected to the evaporator. The chilled water pipeline is connected to the cooling water pipeline in parallel through a bypass pipeline. A bypass valve is arranged on the bypass pipeline.

[0011] Further, the cooling water pump is connected in series on the cooling water pipeline, and a first one-way valve is further arranged on the cooling water pipeline and located between the cooling water pump and the cooling tower heat exchange coil.

[0012] Further, the chilled water pump is connected in series on the chilled water pipeline, and a second one-way valve is further arranged on the chilled water pipeline and located between the chilled water pump and the evaporator.

[0013] Further, the spray water circuit comprises a spray pump for sending spray water in the cooling tower water tray to the spray head.

[0014] Further, the bypass pipeline comprises a first bypass pipeline and a second bypass pipeline, the first bypass pipeline is connected between the water return side of the cooling water pipeline and the water return side of the chilled water pipeline, the second bypass pipeline is connected between the water supply side of the cooling water pipeline and the water supply side of the chilled water pipeline, and the bypass valve is arranged on the first bypass pipeline; the integrated dual-system cold source further comprises a water supplement circuit comprising a water supplement tank, a water supplement pump, a third one-way valve and an expansion tank connected in sequence, and the tail end of the water supplement circuit is connected to the second bypass pipeline.

[0015] Further, when the bypass valve is opened, the compressor and the chilled water pump are in a stop running state.

[0016] The integrated dual-system cold source has the advantages that the chilled water system and the cooling water system are designed integrally, the product has high integration degree, small land occupation and convenient installation.

[0017] The integrated dual-system cold source has the advantages that the chilled water system and the cooling water system are designed integrally, the product has high integration degree, small land occupation and convenient installation.

[0018] In summer, the chilled water system adopts compressor refrigeration, and the condenser adopts the cooling tower to provide cooling water, and the cooling efficiency is higher than that of the air-cooled system.

[0019] In winter, the chilled water system directly uses the cooling tower to supply water, and the compressor does not need to be started, and the natural cold source is fully utilized.

[0020] The integrated dual-system cold source has the advantages that the chilled water system and the cooling water system are designed integrally, the product has high integration degree, small land occupation and convenient installation.

[0021] In summer, the chilled water system adopts compressor refrigeration, and the condenser adopts the cooling tower to provide cooling water, and the cooling efficiency is higher than that of the air-cooled system.

[0022] In winter, the chilled water system can automatically switch to the cooling water system through the bypass valve, and the compressor does not need to be started, and the cooling tower provides low-temperature chilled water, and the energy efficiency is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is the principle diagram of the integrated dual-system cold source of the utility model (normal operation condition);

[0024] Fig. 2 is the principle diagram of the integrated dual-system cold source of the utility model (frozen water natural cooling condition).

[0025] 1, fan; 2, spray head; 3, heat exchange coil; 4, spray pump; 5, first check valve; 6, cooling water pump; 7, cooling water pipeline; 8, water supplement tank; 9, water supplement pump; 10, third check valve; 11, expansion tank; 12, first bypass pipeline; 13, bypass valve; 14, frozen water pipeline; 15, frozen water pump; 16, second check valve; 17, evaporator; 18, compressor; 19, condenser; 20, expansion valve; 21, high-pressure regulating valve. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art belong to the protection scope of the utility model.

[0027] Embodiments of the utility model:

[0028] As shown in the figure, the integrated dual-system cold source comprises: Figs. 1-2 A cooling water circulating loop, comprising a cooling water pump 6, a cooling water pipeline 7 and a cooling tower heat exchange coil 3; the cooling water pump 6 is connected in series on the cooling water pipeline 7, and a first check valve 5 is further arranged on the cooling water pipeline 7, and the first check valve 5 is located between the cooling water pump 6 and the cooling tower heat exchange coil 3.

[0029] A spray water loop, comprising a spray pump 4 and a plurality of spray heads 2, which is used for sending spray water in the cooling tower water tray into each spray head 2 to uniformly spray the cooling tower heat exchange coil 3, so as to achieve the heat exchange purpose. The spray water is uniformly sprayed on the heat exchange coil 3, which can take away the heat of the heat exchange coil 3. The spray water falls on the filler layer under the coil, and the external air sucked by the fan 1 is used for cooling. Part of the spray water evaporates and is discharged from the cooling tower together with the air. The rotation speed and start-stop state of the fan 1 and the spray pump 4 are controlled to control the outlet water temperature of the cooling water.

[0030] A steam compression type refrigeration circuit, comprising a compressor 18, a condenser 19, an evaporator 17 and an expansion valve 20. The refrigeration principle is prior art, and will not be described here.

[0031]

[0032] ​The condenser circuit is connected in parallel to the cooling water pipeline 7 and connected to the condenser 19. The condenser circuit includes a high-pressure regulating valve 21, which is used to control the on / off state and flow rate of the condenser circuit.

[0033] The chilled water circulation loop includes a chilled water pump 15 and a chilled water pipeline 14, which is connected to an evaporator 17. The chilled water pump 15 is connected in series with the chilled water pipeline 14, and a second check valve 16 is also provided on the chilled water pipeline 14, which is located between the chilled water pump 15 and the evaporator 17.

[0034] Chilled water line 14 is connected in parallel to cooling water line 7 via a bypass line, and a bypass valve 13 is provided on the bypass line.

[0035] For ease of description and understanding, the bypass pipeline is defined as including a first bypass pipeline 12 and a second bypass pipeline. The first bypass pipeline 12 connects the return water side of the cooling water pipeline 7 and the return water side of the chilled water pipeline 14, and the second bypass pipeline connects the supply water side of the cooling water pipeline 7 and the supply water side of the chilled water pipeline 14. The first bypass pipeline 12 is equipped with the bypass valve 13. When the bypass valve 13 is open, the compressor 18 and the chilled water pump 15 are stopped.

[0036] The integrated dual-system cooling source also includes a water replenishment circuit, comprising a water replenishment tank 8, a water replenishment pump 9, a third check valve 10, and an expansion tank 11 connected in sequence. The end of the water replenishment circuit is connected to the second bypass pipeline. The water replenishment circuit automatically adjusts the system return water pressure and automatically starts the water replenishment pump 9 to replenish water based on the total system return water pressure.

[0037] The working principle of the integrated dual-system cold source is explained in two operating conditions:

[0038] (1) Normal operating conditions:

[0039] like Fig. 1 As shown, the coolant in the cooling water circuit is sent from the cooling water pump 6 to the cooling tower heat exchange coil 3 via the first one-way valve 5. After being cooled, it is sent to the terminal equipment for heating and then returned to start the next cycle.

[0040] The coolant in the chilled water circuit is pumped by chilled water pump 15 into evaporator 17 via second check valve 16. After being cooled, it is sent to the terminal equipment for heating and then returned to start the next cycle.

[0041] In the vapor compression refrigeration circuit, the refrigerant is pressurized and heated by the compressor 18, and then sent to the condenser 19 to exchange heat with the cooling water. After condensing and cooling down to become a medium-temperature, high-pressure liquid refrigerant, it passes through the expansion valve 20, where it is throttled and depressurized to become a low-temperature, low-pressure gas-liquid two-phase refrigerant. It is then sent to the evaporator 17 to exchange heat with the chilled water, where it evaporates and absorbs heat to become a low-temperature, low-pressure refrigerant vapor, which returns to the compressor 18 for the next cycle.

[0042] The condenser circuit bypasses part of the cooling water into the condenser 19 through the high-pressure regulating valve 21, cools the condenser 19, and then returns the cooling water to the cooling water return pipeline.

[0043] (2) Chilled water natural cooling condition:

[0044] As shown in Fig. 2 When the ambient wet-bulb temperature is lower than the chilled water supply temperature, the chilled water refrigeration mode can be switched from vapor compression refrigeration to natural cooling mode. In the natural cooling mode, the compressor 18 is not started, the condenser circuit is in the closed state, the bypass valve 13 is opened, and the chilled water circuit is switched to the cooling water circuit through the bypass valve 13, and is directly supplied by the low-temperature water of the cooling water circuit.

[0045] The cooling liquid of the cooling water circuit is sent into the cooling tower heat exchange coil 3 by the cooling water pump 6 through the first one-way valve 5, cooled, sent to the terminal equipment for heating, and then returned for the next cycle.

[0046] The cooling liquid of the chilled water circuit is supplied by the cooling water pipeline 7, sent into the terminal equipment through the bypass valve 13 for heating, and then returned to the cooling water return pipeline for the next cycle. The bypass valve 13 controls the bypass flow of the cooling water into the chilled water circuit.

[0047] The integrated dual-system cold source has the following advantages:

[0048] For the double-temperature water supply system of the cold plate liquid cooling system, the chilled water system and the cooling water system are designed integrally, the product has high integration, small footprint, and convenient installation.

[0049] In summer, the chilled water system uses compressor refrigeration, and the condenser uses a cooling tower to provide cooling water, which has higher energy efficiency than air-cooled systems.

[0050] In winter, the chilled water system uses a cooling tower to directly supply water, without the need to start the compressor, and fully utilizes the natural cold source.

Claims

1. An integrated dual system cold source, characterized in that, The application relates to an integrated dual-system cold source. The integrated dual-system cold source comprises a cooling water circulation loop, a spraying water loop, a vapor compression refrigeration loop, a condenser loop and a chilled water circulation loop. The cooling water circulation loop comprises a cooling water pump, a cooling water pipeline and a cooling tower heat exchange coil. The spraying water loop comprises a spraying head for spraying the cooling tower heat exchange coil. The vapor compression refrigeration loop comprises a compressor, a condenser, an evaporator and an expansion valve. The condenser loop is connected with the condenser and is connected in parallel with the cooling water pipeline and comprises a high-pressure regulating valve.

2. The integrated dual system cold source of claim 1, wherein: The chilled water circulation loop comprises a chilled water pump and a chilled water pipeline.

3. The integrated dual system cold source of claim 1, wherein: The chilled water pipeline is connected with the evaporator and is connected in parallel with the cooling water pipeline through a bypass pipeline.

4. The integrated dual system cold source of claim 1, wherein: The bypass pipeline is provided with a bypass valve.

5. The integrated dual system cold source of claim 1, wherein: The cooling water pump is connected in series on the cooling water pipeline.

6. The integrated dual system cold source of any one of claims 1 to 5, wherein: A first one-way valve is further arranged on the cooling water pipeline. The first one-way valve is arranged between the cooling water pump and the cooling tower heat exchange coil. The chilled water pump is connected in series on the chilled water pipeline. A second one-way valve is further arranged on the chilled water pipeline. The second one-way valve is arranged between the chilled water pump and the evaporator. The spraying water loop comprises a spraying pump for sending spraying water in a cooling tower water tray to the spraying head. The bypass pipeline comprises a first bypass pipeline and a second bypass pipeline. The first bypass pipeline is connected between a water return side of the cooling water pipeline and a water return side of the chilled water pipeline. The second bypass pipeline is connected between a water supply side of the cooling water pipeline and a water supply side of the chilled water pipeline. The first bypass pipeline is provided with the bypass valve. The integrated dual-system cold source further comprises a water supplementing loop. The water supplementing loop comprises a water supplementing tank, a water supplementing pump, a third one-way valve and an expansion tank which are connected in sequence. The water supplementing loop is connected to the second bypass pipeline. When the bypass valve is opened, the compressor and the chilled water pump are in a stop running state.

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