Xi'an Gongcheng Daxue xuebao (Oct 2023)
Effect of indoor condition on the evaporative condensation gas pump heat pipe composite air conditioner
Abstract
In order to realize the high-energy-efficiency operation of the gas pump heat pipe composite air conditioner in areas with large dry/wet bulb temperature differences, an evaporative condensation (spray/spray) device was added on the condensation side of the system, so that the system can extend the utilization time of natural cooling sources in summer high temperature seasons, and reduce unit energy consumption. In the enthalpy difference laboratory, the indoor return air temperature was set to three working conditions of 24, 30, 35 ℃, and the outdoor temperature was adjusted every 5 ℃ from -10 ℃ to 45 ℃ under each indoor working condition, and the cooling capacity, power consumption and other data of 100% load and 75% load were recorded. The results show that the evaporative condensation technology can reduce the condensing temperature, broaden the operating temperature range of the gas pump heat pipe mode, and reduce the operating energy consumption; the evaporation temperature of the system increases with the increase of the indoor return air condition. Under the indoor conditions of 24, 30, 35 ℃, average PUE≤ 1.33, 1.28, 1.25 were achieved respectively. Under 75% load rate, the composite air conditioner prototype can achieve average PUE≤1.3, 1.27, 1.24, which has good energy-saving benefits.
Keywords
