A Study Of Underground Water Transfusion To Ground Source Heat Pump

The Ground Source Heat Pump is a highly efficient, energy-saving air conditioning which is helpful for environmental protection and sustainable development. The Ground Source Heat Pump technology has brought opportunities to solve the energy crisis, the pollution problem and sustainable development of china. The technology has a beautiful future in China.The applied research on Ground Source Heat Pump involves the geological condition in the shallow layer earth. The crag earth nature is the determining factor of the movement characteristic of Ground Source Heat Pump. But there is the other dynamic factor which is the ground water transfusion。Looked from the fundamental research and the actual project, it can have a significant influence to the place source heat pump movement characteristic.This thesis first elaborated the characteristic of the Ground Source Heat Pump and present situation and the progress of research that the ground water influence on the Ground Source Heat Pump. Here we study the underground hydrology characteristic related to the Ground Source Heat Pump in Beijing urban district. Then we propose the conception to establish a database of underground hydrogeological conditions which is suitable to Ground Source Heat Pump. We discuss the reduced mathematical model of underground water transfusion and the coupling heat transfer. Concerning the geology and hydrology condition related to Ground Source Heat Pump in the Beijing area, we establish a physical model according to the U tube actual form, compute the model by using the value computation method and carry on the simulation by using ANSYS software. This method is different from the equivalent diameter simplification model existed.ANSYS is a powerful simulation software which is developed by US. It can complete the thermal analysis, the hydrodynamics analysis and so on. Under the condition of the underground water transfusion and the coupling heat transfer, this thesis analyzes the heat transfer influence of the U-pipe according to the different ground water speed of flow. According to the prospects for development of the engineering material, we analyze the influence of the heat interchanger and transfer brought by the U-pipes with different thermal conductivity. Simultaneously, we study the heat transfer loss of the heat short-circuit of U-pipes under the different conditions.