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主要研究了直接式原生污水源热泵冬季供暖工况下的自控调节特性。通过对系统的自动控制可知,当室内温度从20℃降到18℃时,频率控制器启动,系统各参数维持稳定,房间热负荷约为15kW,控制器未做出大的调节;随着室内温度从18℃上升,压缩机的频率降低,通过PID的调节控制,室内温度保持在18℃附近,此时热负荷为9.5kW,压缩机耗功降低了48%,COP从3.4上升到4.1。当室内温度在16～20℃之间变化时,控制器随室内温度高于或低于设定温度,自动做出调节。为了维持温度在18℃附近,房间的热负荷量约为11.5kW,功耗3kW,COP为4,蒸发器和冷凝器的传热系数分别为1192和292W/(m~2·K)。
Mainly studied the direct control of primary sewage source heat pump heating conditions in winter under the regulation. Through the automatic control of the system, it can be seen that when the indoor temperature is lowered from 20 ℃ to 18 ℃, the frequency controller is started and the system parameters are stable. The room thermal load is about 15kW, and the controller has not made a big adjustment. With the indoor The temperature rises from 18 ° C and the compressor frequency decreases. The room temperature is maintained around 18 ° C by PID control. At this time, the thermal load is 9.5kW, the compressor work efficiency is reduced by 48%, and the COP rises from 3.4 to 4.1. When the indoor temperature changes between 16 ~ 20 ℃, the controller with the indoor temperature is higher or lower than the set temperature, automatically make adjustments. In order to maintain the temperature near 18 ℃, the heat load in the room is about 11.5kW, the power consumption is 3kW, the COP is 4, and the heat transfer coefficients of evaporator and condenser are respectively 1192 and 292W / (m ~ 2 · K).