太阳能跨季节蓄热增强土壤源热泵供暖系统建模与仿真研究

Research on modeling and simulation of ground source heat pump heating system with seasonal solar thermal energy storage enhancement

针对土壤源热泵在寒冷地区农业温室供暖时存在的土壤热失衡问题,文章基于TRNSYS软件,结合实验数据,开展了太阳能跨季节蓄热增强土壤源热泵供暖系统(SSTES-GSHP)建模与仿真研究。所构建的仿真模型各项能量数据计算误差大部分在±2.5%以内,土壤平均温度误差小于0.09℃;10 a长周期预测结果表明,该系统可以有效维持系统井群区域土壤热平衡;基于廊坊地区玻璃温室典型热负荷和土壤源热泵系统能效,建立了维持地温平衡的集热器面积匹配设计准则A/S=0.158+0.021COPG。文章可为我国北方地区农业清洁供暖提供技术参考和理论支撑。

In order to solve the problem of soil thermal imbalance that exist when ground source heat pump systems(GSHP)are used to heat agricultural greenhouses in cold regions of China,the modeling and simulation research of the seasonal solar thermal energy storage coupled ground source heat pump heating system(SSTES-GSHP)was carried out.The constructed simulation model has good prediction accuracy,most of the calculation errors of various energy data are within±2.5%,and the calculation error of average soil temperature is less than 0.09℃.The 10-year long-period operation simulation prediction results show that the composite system effectively maintains the ground temperature in the ground source heat pump well group area.Targeting the typical heat load of the glass greenhouse in this area,comprehensively considering the COP of the ground source heat pump system,and establish the design criteria for matching the solar collection area of the seasonal solar thermal energy storage system.The ratio of the collector area to the greenhouse area(A/S)required to maintain the ground temperature balance meets the correlation:A/S=0.158+0.021COP_(G).This research can provide technical reference and theoretical support for clean heating in the agricultural field in northern China.