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以济南市某工程为例,使用DeST软件对该工程进行年逐时负荷模拟,得到冷负荷峰值为313.3 kW,热负荷峰值为293.7 kW,累计年排热量为166 451 kW·h,累计年提热量为210 380 kW·h,热不平衡率为20.88%。利用TRNSYS软件建立了太阳能-地源热泵系统动态模型,并进行模拟分析。当地土壤初始温度均为15.3℃,复合系统的模拟结果显示系统运行20年,地温均值一直保持在14.8~16.4℃的稳定范围内。研究表明:太阳能-地源热泵复合系统具有良好的蓄热能力,提高了太阳能利用率,可有效解决寒冷地区地源热泵的冷热不平衡问题,是解决严寒地区供暖问题的一个重要途径。
Taking a project in Jinan City as an example, the annual hourly load simulation of the project was carried out by using DeST software, and the peak value of the cooling load was 313.3 kW, the peak value of the heat load was 293.7 kW, and the accumulated annual heat emission was 166 451 kW · h. The heat quantity is 210 380 kW · h, and the thermal imbalance rate is 20.88%. The dynamic model of solar-ground source heat pump system was established by TRNSYS software and simulated. The initial soil temperature was 15.3 ℃. The simulation results of the composite system showed that the system operated for 20 years and the mean value of the ground temperature remained in the stable range of 14.8-16.4 ℃. The results show that the solar-GSHP system has good heat storage capacity, improves the solar energy utilization rate, can effectively solve the heat and water imbalance of ground source heat pump in cold areas, and is an important way to solve the problem of heating in severe cold area.