武汉地区地源热泵夏季工况能效测评与效益分析

为探讨地源热泵系统的实际运行能效,通过对武汉市地源热泵系统的短期测试与长期监测,讨论了热泵及系统的实际性能系数、水泵效率、水系统输送系数等,得出了热回收系统实际平均综合能效系数为2.34,低于无热回收机组的性能系数3.77;水泵实际运行平均效率为43.9%,系统实际能效系数是额定能效系数的58.9%;实际累计负荷是计算累计负荷的1/3～2/3,实际投资回收期大于计算回收期。还得出了合理选择设备及附件、提高系统设备能效及附件质量、设置调整水泵输送能力的设施以及合理运行调节是提高地源系统实际能效的重要技术措施等结论。

The energy efficiency and benefit analysis of ground-source heat pump in Wuhan region of summer condition

In order to study the actual operation efficiency of ground-source heat pump system,the actual coefficient of performance,pump efficiency,water transport coefficient,etc.was discussed.Through analysis the testing data,the actual average energy efficiency coefficient of the heat pump system with heating recovery was 2.34,which was lower than the energy efficiency coefficient of 3.77 in the normal system.The actual average pump efficiency was 43.9% and the actual water transport coefficient was 58.9% of the rated energy efficiency and the actual total load was one-third to two-thirds of the calculated total load.Reasonable selection of equipment and accessories,improvement of the system equipment energy efficiency and quality of attachments,adjustment of water pump transmission capacity facilities and reasonable operation are all the important technical measures to improve the actual energy efficiency of ground source systems.