西安地区某地源热泵室外换热器运行情况分析

Operation Analysis of Outdoor Heat Exchanger for a Ground Source Heat Pump in Xi'an

本文旨在研究西安地区某地源热泵的长期运行状况。通过热响应试验、效率测试、热负荷能力测试及对运行参数的监控分析,说明机组能效比达到了设计水平;自投运至今,室外换热器进口水温长期持平,并与地温最高温度差在±13℃之间;室外换热器进口水温随负荷升高降低。研究表明,室外换热器冬季换热能力56 k W/m是可行的;西安适宜采用地源热泵,并且土壤承载负荷高,地温恢复快;该项目作为西安地区最早投入运行的建筑面积6 000 m2以上,设计制冷负荷500 k W以上以浅层土壤源地源热泵项目,可以为地质、气候情况相近地区采用土壤源地源热泵项目提供设计经验。

The purpose of this paper is to study the long - term health of a ground source heat pump for inXi＇an. Thermal response test, efficiency test, the thermal load capability testing, monitoring and analysisof operating parameters,is implemented. It shows that the EER has reached the design level. It is showedthat the inlet temperature of the outdoor heat exchangerperature between the inlet of the outdoor heat exchangerand the temperature increased with the load. The studyunchangedin a long time, and the maximum tem-and the ground temperature maintains by - 13 ℃,shows that the outdoor heat exchanger capacity of56 kW/m are possible in the winter. Studies have shown the use of ground source heat pump in Xi＇an ap-propriate suitable, and the soil with high load bearing and ground temperature recovering rapidly. It pro-vides design experience in similar conditions for Ground Source Heat Pump projects