高校建筑负荷模拟及热泵机组性能分析

Load Simulation of University Building and Performance Analysis of Heat Pump Unit

采用TRNSYS软件,对天津地区某高校教学楼供冷期、供暖期的冷负荷、热负荷进行模拟计算。采用地下水水源热泵机组作为冷热源,根据冷热负荷对热泵机组进行选型。选取严寒期某日,对热泵机组制热量、压缩机输入电功率、负荷率、制热性能系数等随测试时间的变化进行实测计算,分析热泵机组制热量的影响因素以及制热性能参数随部分负荷率的变化。热泵机组制热量随末端空调装置开启情况变化明显。负荷率为50%~80%时,热泵机组的制热性能系数维持在比较高的水平,未出现较大幅度的波动。负荷率为70%时,热泵机组的制热性能系数达到最大值5.18。当负荷率在50%以下时,热泵机组的制热性能系数出现了较大幅度下降。

The cooling and heat loads of the teaching buildings in a university in Tianjin area during the cooling period and heating periods are simulated and calculated by TRNSYS software. Taking groundwater source heat pump unit as cooling and heat sources,the heat pump unit is selected according to the cooling and heat loads. The variations of the heating capacity of the heat pump unit,the input power of the compressor,the load rate and the heating performance coefficient with the test time in a day during the cold period are measured and calculated,and the factors affecting the heating capacity of the heat pump unit and the variation of the heating performance coefficient with the partial load rate are analyzed. The heating capacity of the heat pump unit changes significantly with the starting condition of the terminal air conditioning device.When the load rate is 50% to 80%,the heating performance coefficient of the heat pump unit is maintained at a relatively high level,and there is no large fluctuation. When the load rate is 70%,the heating performance coefficient of the heat pump unit reaches the maximum value of 5. 18. When the load rate is less than 50%,the heating performance coefficient of the heat pump unit decreases greatly.