复合式热泵系统运行策略的模拟与分析

Simulation and Analysis of Operation Strategy of Compound Heat Pump System

为确定复合式土壤源热泵系统的最佳运行策略,以天津某一高校建筑为研究对象,通过TRNSYS模拟仿真,分析冷却塔辅助土壤源热泵的复合式系统不同运行策略(最高温度控制、温差控制和在同一时间将最高温度控制和温差控制进行耦合的控制策略)下土壤最高平均温度、各主要设备能耗及系统总能耗的变化情况。确定耦合控制法下对应的最优工况点,相比前两种运行策略,运行20年总能耗分别降低了64499,154832 kW·h;最终的土壤最高平均温度分别下降了1.41,3.06℃。本结果对进一步研究冷却塔辅助土壤源热泵复合式系统的最佳运行策略提供参考。

To determine the optimal operating strategy of compound soil source heat pump system,a building of a university in Tianjin was used as the research object,through the TRNSYS simulation,the highest average temperature of the soil,the change of the energy consumption of main equipment and change of total energy consumption of the system under different operation strategies of soil source heat pump of the cooling tower auxiliary compound system(the strategies for the highest temperature control,temperature difference control and coupling control of highest temperature control and temperature)were analyzed.And the corresponding optimum operating conditions under the coupled control method was determined.Compared with the first two operating strategies,the total energy consumption in 20 years of operation was reduced by 64,499 kW·h and 154832 kW·h,respectively.The final maximum average temperature of soil was decreased by 1.41℃and 3.06℃,respectively.The results provide a reference for further research on the optimal operation strategy of compound cooling tower-assisted soil-source heat pump system.