The Research And Analysis On Circulate Characteristic Of GSHP

At present, due to its high efficiency and energy saving, Ground Source Heat Pump (GSHP) is gradually recognized by people. Nanjing is the typical area which has the climate of cold winter and hot summer. The refrigerating and heating source which is energy saving, cleanly and steadily running is strongly needed to solve the refrigeration and heating in this area. So the GSHP is very suitable for the climate which is hot in summer, cold in winter and the requirement of energy-saving according to its systematic characteristic.Combining with the former study, the subject has done the following work:A transient heat transfer model of the soil temperature field around a vertical U-tube of ground source heat pump was established. The numerical simulation was obtained by using MATLAB software .By making the simulation of cooling mode in summer and winter, the change rules of the soil temperature with the radial direction, the thermal influencing radius in the vertical multi-pipe were obtained.At the same time, we got the date of circulating in winter and both in summer by experiment. By comparing the date of experiment with the date of theory, its correctness can be verified. The influences of every parameter are investigated, which can provide basis for further research, meanwhile, the corresponding changing curves are provided.