Ground Source Heat Pump Ground Heat Transfer Model And Experimental Study

Ground source heat pump(GSHP) air conditioning systems ultilize ground soil as a heat source/sink, achieve heat transfer between the soil and a working fluid (water or antifreeze solution) circulating in a closed loop buried in the groud. Compared to other conventional alternatives, the GSHP system makes full use of renewable energy, and boasts the features of protecting the envirinment and reducing electric power consumption. It has been applied in Eerope and American for a few decades. In recent years the technology has been completed here. However, researches on design of the geothermal heat exchanger(GHE),performance predictions of the GSHP systems and systerm optimization are far from adequate.Besides,no national standards and creteria are promulgated for GSHP systems. This situation impedes its application.In this paper, in view of ground-source heat pump system to do the following work:1. This paper conducted a serious study about System Design in the underground heat exchanger design problems. Learn from the past, the advantages and disadvantages of the mathematical model of heat exchanger, in order to set up a Fourier series based on the underground heat exchanger thermal model of heat transfer. Focuses on the model set up method, the calculation process and in practical engineering test model accuracy.2. Introduce a ground-source heat pump system design method, and the actual project to make ground-source heat pump system design.3. To the source system after installation, respectively, in the cooling and heating period, the system followed. Know the work of systems:including the import and export of temperature, for heat, energy efficiency ratio. And two periods of heat exchangers and pipe work to compareThe Ground-Source Heat pump is a fresh development in China and has a promising developing. The theoretially model and the way of numerical value calculation will offer accord and reference to application and study of GSHP.