| The sustainable development of society can’t be separated from energy supply,the new era because of the huge amount of energy use and unreasonable use,resulting in energy shortage and environmental pollution,making it an urgent problem to be solved.With the rapid development of science and technology,energy-saving technology and environmental protection technology are changing with each passing day,seeking a high-grade energy use technology with two kinds of quality,ground source heat pump technology has been gradually included in the key areas of scientific research.Ground source heat pump technology to heat pump unit as the intermediate hub,the underground part of the cold/thermal energy through the underground heat exchanger replacement to the ground part,the formation of low-grade thermal energy to high-grade thermal energy conversion,in order to provide a cold/heat load for the building.In this paper,a project in Harbin is used as a prototype to carry out thermal response test and data monitoring,and the physical parameters and temperature of soil around underground buried pipe are obtained.Based on the data collection,this paper analyzes the temperature interference between underground wells of ground source heat pump and the soil temperature distribution between underground wells,optimizes the adjustment of ground source heat pump Well group,and studies the law of temperature interference between wells of multi-well circulatory system in heating period.Based on the data collected during the operation of the project,the correlation of temperature interference between wells is obtained by analysis and summary.At the same time,a three-dimensional physical and mathematical model of buried pipe and soil heat transfer is established,the heat exchange process of buried pipe is simulated,the simulation results are analyzed,and the numerical results are compared with the experimental analysis results.This model is used to analyze the temperature distribution between ground source heat pump wells,and the influence of soil structure and buried pipe form on heat transfer performance is neglected,and the range of 0-600 meters depth and the length of 0-17 meters in the well spacing of ground source heat pump are numerically calculated.The results show that the closer the distance between the heating well and the monitoring well,the stronger the temperature interference between the wells,and with the increasing distance between the wells,the interference intensity becomes smaller.The long continuous running time of underground heat exchanger will lead to the decrease of heat exchange in buried pipe,and the temperature propagation radius of heat exchanger increases with the increase of running time.At the same time,the influence strength coefficient of the temperature between Wells is analyzed,and the interference problem between wells can be understood more intuitively by this coefficient,which is also more favorable to improve the development and utilization of heat pump wells.In this paper,the problem of temperature interference between underground wells of ground source heat pump and the distribution of soil temperature between underground wells are studied by means of data analysis and numerical simulation.The research results are instructive to the determination of reasonable interwell distance between ground source heat pump,and have a deeper understanding of temperature distribution between underground wells. |
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