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

Abstract

The invention discloses a two-phase refrigeration and gas compression integrated cooling system for electronic equipment. The two-phase refrigeration and gas compression integrated cooling system comprises a pump / compressor integrated dynamic core, a filter, a flowmeter, a first four-way reversing valve, an evaporator, a condenser, a second four-way reversing valve, a gas-liquid separator and a separation branch circuit comprising two check valves, one electronic expansion valve and one flow control valve. The electronic equipment to be cooled is adhered to a heat-transfer cold plate of the evaporator. The maximum temperature signal of the surface of the electronic equipment is used for controlling reversing motion of two four-way reversing valves. In the normal working condition, the system is used for cooling the electronic equipment by adopting the manner of boiling heat transfer in the two-phase cooling mode so that the characteristic of energy conservation is achieved. When surface temperature of the electronic equipment exceeds the set value with changes of ambient temperature or increase in thermal loads, control equipment takes an actuating signal for decreasing temperature of the electronic equipment in the mode of gas compression refrigeration and overcoming defects of two-phase cooling in the working condition with high ambient temperature in order to ensure normal operation of the 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...

AI Technical Summary

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

Images