Two-phase refrigeration and gas compression integrated electronic equipment cooling system

Abstract

The invention discloses a cooling system for electronic equipment integrating two-phase refrigeration and gas compression, which comprises an integral power core of a pump / compressor, a filter, a flow meter, a first four-way reversing valve, an evaporator, and a condenser The device, the second four-way reversing valve, the gas-liquid separator and the separation branch contain two one-way valves, an electronic expansion valve and a flow regulating valve. The cooled electronic equipment is attached to the heat exchange cold plate of the evaporator, and the highest temperature signal on the surface of the electronic equipment controls the reversing action of the two four-way reversing valves. Under normal working conditions, the system uses a two-phase cooling method to cool electronic equipment by boiling heat exchange in the evaporator, which has the characteristics of energy saving. When the ambient temperature changes or the heat load increases, when the surface temperature of the electronic equipment exceeds the set value, the control equipment takes an action signal to reduce the temperature of the electronic equipment in the form of gas compression refrigeration, and overcomes the two-phase cooling under high ambient temperature conditions. Insufficient to ensure the normal operation of electronic equipment.

Description

technical field [0001] The invention relates to equipment capable of cooling high-power electronic equipment, in particular to a cooling system that can adapt to changes in ambient temperature and thermal load, integrates two-phase cooling / gas compression, and can save energy to a large extent. Background technique [0002] With the vigorous development of IT, the energy consumption of data centers is getting larger and larger. According to incomplete statistics, in 2011, the power consumption of data centers was 100 billion kWh, and the growth rate was 10-20% year by year. According to the current growth rate, by 2030, the data center will consume all the electricity. Among all the energy consumption, 45% is used for the energy consumption of non-IT technology for cooling electronic equipment such as chips, which is undoubtedly a huge waste of energy. [0003] At present, the cooling of electronic equipment in data centers mainly adopts air-cooling method, which reduces t...

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Problems solved by technology

[0005] However, the condensation temperature difference of the two-phase cooling system is generally small, especially when the ambient temperature is high, such as in summer, the requirements for the condenser will be more stringent, and whether it has enough condensation capacity will become a relatively big problem

On the other hand, as the ambient temperature increases, the temperature of the circulating working fluid increases accordingly. When the cooling limit decreases, the heat transfer performance will also deteriorate. Even if the heat transfer coefficient remains unchanged, it can be known from Q=hΔt that the electronic equipment can maintain The temperature will also rise, it is difficult to guarantee whether there is enough cooling performance in high ambient temperature

Secondly, the heat source load of electronic equipment is generally not constant. When the load exceeds the design load and the condensation capacity of the condenser is insufficient, the temperature of the circulating working fluid will gradually increase, so that the temperature of the electronic equipment may exceed the rated temperature , thereby degrading the performance of the electronic device

These shortcomings restrict the practical application of the two-phase cooling system.

[0006] Considering the gas compression refrigeration system, when the load is small or the ambient temperature is low, using this method is not only a great waste of energy, but also when the load is small, the reduced evaporation temperature may often make the temperature of electronic equipment The reduction is more, which may make the temperature of the electronic equipment too low and reduce the operating characteristics

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