Integrated soil cool storage and groundcoupled heat pump systems

For the purpose of leveling electric load and utilizing the renewable ground thermal energy, presents an integrated soil cool storage and groundcoupled heat pump system. In the integrated system, the buried pipes serve as both the thermal storage devices and geothermal heat exchangers. In cooling season, the cooling load is stored in the underground soil partially or fully during nighttime (offpeak period) to treat the load requirement of buildings during daytime (peak period). In transitional cooling season, the system operates on cooling mode of groundcoupled heat pump system (GCHPS), and rejects the heat to soil for utilizing in winter. In heating season, the system operates on heating mode of GCHPS, and the soil is taken as its heat source. Summarizes the system forms, technical characteristics and pivotal research points of the integrated system. Analyses the factors that influence the operation characteristics and cooling loss based on the previous work.