供水温度对低温空气源热泵制热性能的影响
Effect of Water Supply Temperature on the Performance of Low Temperature Air Source Heat Pump System

本文通过设置环境温度分别为-12 ℃、-6 ℃，初始水温为20 ℃，开启热泵进行加热，研究了不同供水温度对空气源热泵的制热量、系统功耗、能效、排气温度、压缩比等方面的影响。研究结果表明：在相同的初始水温下，随着加热的进行，压缩机的制热量先增加后降低，供水温度为40 ℃时的制热量最大；当环境温度为-12 ℃，供水温度从25 ℃增至55 ℃时，系统功耗从11 905 W增至24 417 W，增加105%，系统能效从4.03降至2.11，下降47.6%。
In this paper, the effect of the water supply temperature on the thermal performance of a heat pump is analyzed. The influence of the water supply temperature on the performance of a heat pump system is investigated for an ambient temperature ?12 °C and ?6 °C and an initial water supply temperature of 20 ℃. The experimental results indicate that, under the same initial temperature, the heating capacity of the compressor system first increased and then decreased, with a maximum heating capacity reached for a water supply temperature of 40 ℃. When the ambient temperature was at ?12 ℃, the water was heated by the heat pump from 25 ℃ to 55 ℃. The power consumption of the system increased from 11,905 W to 24,417 W, an increase of 105%, and the system energy efficiency decreased from 4.03 to 2.11, a decrease of 47.6%