Application of air cooled gas pump heat pipe compound cooling technology in energy storage power station

Existing energy storage plants currently employ traditional steam compression refrigeration, and the utilization ratio of natural cold sources requires enhancement. The introduction of air pump heat pipe technology can remedy this problem. According to the temperature control indicators of the air-cooled energy storage battery cabinet, the 20 kW air-cooled gas pump heat pipe composite air condition prototype was designed and the experimental study on the prototype performance was conducted. The testing methodology utilizes the enthalpy difference method, with the outdoor dry-bulb temperature controlled between -5 ℃ and 35 ℃. Data pertaining to the cooling capacity and power consumption of the prototype at 100% load are meticulously recorded for analysis. The results show:① lithium batteries work best in the range of 15~35 ℃, and during the charging/discharging process, excessive temperature difference between battery cells can cause series capacity mismatch, insufficient charging between parallel circuit batteries/clusters, and incomplete discharge; ② it is necessary to control the return air temperature of the air-cooled air condition in the energy storage battery cabinet to (25±1)℃; ③ under the same condenser and evaporator configuration, the energy efficiency ratio (EER) of traditional air-cooled air condition and gas pump heat pipe composite air condition is both 2.21 under outdoor operating conditions of 35 ℃, with the EER reaching 3.81 under outdoor operating conditions of 10 ℃, 5.63 under air pump heat pipe composite air condition, indicating good energy-saving potential; and ④ the tested technology is simple, reliable, and has good energy-saving advantages. Under all outdoor operating conditions, the annual energy efficiency ratio (AEER) of traditional air-cooled air condition is 3.31, while the AEER of air pump heat pipe composite air condition is 4.04.