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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。
In order to discuss the actual operation energy efficiency of the GSHP system, this paper discussed the practical performance coefficient, pump efficiency and water system transfer coefficient of heat pump and system through short-term testing and long-term monitoring of ground source heat pump system in Wuhan. The actual average comprehensive efficiency coefficient of the system is 2.34, which is lower than that of the non-heat recovery unit with a coefficient of performance of 3.77. The average actual efficiency of the water pump is 43.9% and the actual energy efficiency coefficient of the system is 58.9% of the rated efficiency coefficient. The actual cumulative load is 1 / 3 ~ 2/3, the actual investment recovery period is greater than the calculated payback period. It also concludes with the reasonable selection of equipment and accessories, improvement of energy efficiency and attachment quality of system equipment, provision of facilities for adjusting pump delivery capacity and rational operation adjustment as important technical measures to improve the actual energy efficiency of ground source systems.