Numerical simulation of heating & cooling air conditioning system of solar aided ground source heat pump system with soil storage

In solar aided ground-source heat pump (SAGSHP) system with soil storage, heat collected by solar energy in three seasons was stored in soil by vertical U-type heat exchangers. Heat extracted by the ground-source heat pump combined with the heat collected by the solar collector is employed to heating. Some of the soil exchangers are used to store solar energy in the soil so as to be used in winter after heating period; the others are used to extract cold in the soil by circulation pump for air conditioning in summer. Low temperature radiant floor (ceiling) heating and cooling air conditioning system which can highly meet personal thermal comfort is used indoor. The temperature SAGSHP supplied is just suitable for the requirement of low temperature radiant system. Numerical simulation was done for low temperature radiant floor (ceiling) air conditioning system, how temperature of cold water affects floor temperature and ability of heat transfer was studied and also variation and restoration of soil temperature was researched. It indicates that economy, reproducibility and reliability of SAGSHP system are obvious. It can run for many years.