地埋管地源热泵系统运行性能实测分析
Analysis of operational performance of underground pipe ground-source heat pumps based on field tests
摘要：
本文基于实际能源站对其地埋管地源热泵系统进行了一个供冷季的现场测试,计算了耗电输冷比、效率、能效比等指标。分析了热泵机组能效比低的原因,提出了优化运行策略,并在实际应用中验证了优化策略的效果。结果表明:系统各设备均运行在高效区内,热泵机组能效比保持在4以上,地源侧与用户侧的水泵效率分别提升21.13%、23.68%,耗电输冷比的平均值降低至0.029,共节约电能85 205.1 kW·h;保证用户舒适性的同时降低了运营成本,增强了系统的可靠性、灵活性、高效性与经济性。
Abstract：
In this paper, a field test of the underground pipe ground-source heat pump system is carried out in the cooling season based on the actual energy station, and the indicators such as the electricity consumption to transferred cooling quantity ratio, efficiency, and energy efficiency ratio are calculated. The reasons for the low energy efficiency ratio of heat pump units are analysed, the optimization operational strategy is proposed, and the effect of the optimization strategy is verified in practical application. The results show that all equipment in the system runs in the high-efficiency zone, the energy efficiency ratio of the heat pump units is maintained above 4, the pump efficiency of the ground-source side and user side increases by 21.13% and 23.68%, respectively, the average electricity consumption to transferred cooling quantity ratio is reduced to 0.029, and the total energy saving is 85 205.1 kWh. It ensures user comfort while reducing operating costs, enhancing system reliability, flexibility, efficiency and economy.
Keywords:shallow geothermal; underground pipe ground-source heat pump; energy monitoring; operational performance; operational strategy; electricity consumption to transferred cooling quantity ratio