Simulation Research of Solar Ground Source Heat Pump Heating System Based on TRNSYS
Using DEST building energy simulation software,a building in Zhangjiakou City was simula-ted 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 simu-lation 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 ener-gy consumption of the system is 31191.25kW/h.According to the results,it can be seen that,rela-tive to the fixed-flow operation,the user side of the variable-flow operation of the system COP in-creased by 14.7％,and the total energy consumption of the system reduced by 14.56％.The over-all performance of the solar ground source heat pump system is better under load side variable flow operation.
Solar ground source heat pumpConstant flow methodVariable flow methodSystem COP
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