基于TRNSYS太阳能地源热泵供暖系统仿真研究

Simulation Research of Solar Ground Source Heat Pump Heating System Based on TRNSYS

利用DEST建筑能耗模拟软件,对张家口市某建筑进行全年逐时热负荷模拟,利用太阳能和地热能两种可再生能源作为供暖热源,以TRNSYS建立太阳能地源热泵系统仿真模型,在供暖期采用定流量和变流量两种不同的系统运行方式进行模拟分析,分析结果表明,两种供暖系统COP分别为3.74和4.29。采用定流量方式运行时,循环水泵总能耗为9610.87kW/h,热泵机组总能耗为26122.69kW/h,系统总能耗为35733.56kW/h。负荷侧采取变流量方式运行时循环水泵总能耗为6229.89kW/h,热泵机组总能耗为24961.36kW/h,系统总能耗为31191.25kW/h。根据结果可看出,相对于定流量运行,用户侧变流量运行下系统COP提高14.7%,系统总能耗减少14.56%。负荷侧变流量运行下太阳能地源热泵系统整体性能更优。

Using DEST building energy simulation software,a building in Zhangjiakou City was simulated for heat load throughout the year time by time,using solar energy and geothermal energy as two kinds of renewable energy as heating heat source,and TRNSYS was used to establish a simulation model of solar geothermal heat pump system,and simulation analyses were carried out using two different system operation modes of fixed-flow and variable-flow during the heating period,and the analysis results showed that the system COPs of the two kinds of heating systems were 3.74 and 4.29 respectively.The COP of the two heating systems are 3.74 and 4.29 respectively,and the total energy consumption of the circulating water pump is 9610.87kW/h,the total energy consumption of the heat pump unit is 26122.69kW/h,and the total energy consumption of the system is 35733.56kW/h.The total energy consumption of the circulating water pump in the load-side variable-flow mode is 6229.89kW/h,the total energy consumption of the heat pump unit is 24961.36kW/h,and the total energy consumption of the heat pump unit is 6229.89kW/h,and the total energy consumption of the heat pump unit is 24961.36kW/h.24961.36kW/h,the total energy consumption of the system is 31191.25kW/h.According to the results,it can be seen that,relative to the fixed-flow operation,the user side of the variable-flow operation of the system COP increased by 14.7%,and the total energy consumption of the system reduced by 14.56%.The overall performance of the solar ground source heat pump system is better under load side variable flow operation.