Investigation And Numerical Simulation Of Different Satellite Wall With Local Source Heat Pump

Energy and environment problem are important problems in today’s world, and energy consumption of air conditioning for building occupies a great proportion, so it has got sustained attention in recent years. In order to alleviate the contradiction between supply and demand of energy, to reduce environmental pollution, actively carrying out some measures in the field of air conditioning energy conservation is imperative. Compared with traditional air conditioning system, soil source heat pump uses shallow geothermal energy for refrigeration and heating, and because of the advantages such as high efficiency, energy saving, environmental protection, the system is widely used in recent years, and the development prospect is great.In the design of soil source heat pump air conditioning system, the design of the underground buried pipe heat exchanger is crucial. As China’s territory is vast, there are many differences between different parts of the geological structure, all of these will affect the heat transfer performance of buried pipe heat exchanger. In the specific project, this paper uses software to simulate and study the heat transfer performance of buried pipe, and then compare the difference of heat transfer performance between two different forms of buried pipe, which are single U and double U. Combining with the specific project, we compare the differences in thermal efficiency and economy, and this provides theoretical reference in the selection of the design proposal.In this paper, we first do a literature research about the study of soil source heat pump at home and abroad, which provides the relevant theoretical basis for the subsequent research. Then according to the project, we do a soil thermal response test in the field of the project, which gives us physical parameters of the soil for the following simulation.With the commercial fluid dynamics software which named FLUENT, we simulate the heat exchange process of single U and double U, which working in summer and winter. We also simulate for 1 day of short run and 30 days of long run. We consider the affects of different inlet temperature and different inlet velocity. According the analysis of simulation results, we get the different heat exchange performance between buried pipe and surrounding soil, which changes with the change of the operating condition of soil source heat pump. The performance contains the temperature of fluid and soil and the influence of different temperature. In the same operating condition, we compare the outlet temperature of fluid, the thermal radius of soil and the heat exchange amount of single drill between single U and double U buried tube.Through the study of ground source heat pump system, we hope to achieve some theoretical basis for practical engineering, which help the operation of ground source heat pump system and get the goal of energy saving and environmental protection.