Heat Exchanger Effects Of The Underground Tube Bundle By Groundwater Seepage

Ground source heat pump system (GSHPS) is taken as a refrigeration and air conditioning technology which having energy-saving and environmental protection function,it use heat exchanger embedded in underground exchange heat with soil and could improve the energy grade of energy shallow geothermal, The development of ground source heat pump technology is affected by a lot of factors andthe performance of ground heat exchanger heat transfer has a direct influence with ground-source heat pump efficiency.This paper anslysis ground-source heat pumps at home and abroad ground heat exchanger theoretical and experimental study ,found that in the theoretical research aspect, the currently ground heat exchanger calculation models are based on two-dimensional equivalent tube model,which is not a true reflection of heat exchangers heat transfer process; In the experimental research, the heat exchanger structure, concentrated in a single U-type and double U-type, other structural forms seldom touched.As the population density and building density increases, the fabric of space getting smaller and smaller , which requires ground-source heat pump ground heat exchanger must achieve its full capacity, the largest single well to improve heat transfer, but for the current it will not be easy to implement due to the ground heat exchanger structure is concerned. This paper proposes the idea of single-well and multi-tube, and carry out tube bundle type ground heat exchanger theoretical and experimental research.By theoretical analysis, this paper establishes a simplified model of ground heat exchanger heat transfer calculation, which Simplify the complex seepage on the influence of underground heat exchanger.Simulated vascular type heat exchanger in the cases of summer condition and winter under no seepage and seepage circumstances.Get temperature field of heat exchanger and surrounding soil and analyze the data,found in seepage, thermal obviously improved.This paper also simulate in different seepage speed conditions and analyzes the influence of seepage velocity on the bundle heat exchanger and the surrounding soil heat transfer.The soil is considered as a porous mode in this paper.Simulation soil heat exchange rule under seepage situation,Show that the influence of soil seepage on heat exchanger through the data.Analysis the method of improving the thermal efficiency of the method of underground burying tube heat exchanger.So as to improve soil temperature environment, Make ground source heat pump system design and engineering application bundle heat exchanger more reasonable and provide to engineering practice theoretical data reserves and technical support.