Development and Utilization Planning Evaluation of Ground Source Heat Pump System Based on Heat Balance Principle
In order to ensure the sustainable development and utilization of the ground source heat pump system in the Haimen area,scientifically and reasonably design the layout plan of the buried pipe ground source heat pump system,accurately evaluate the extractable shallow geothermal energy resources of the system,based on the hydrogeological and shallow geothermal geological conditions of the research area,and based on the principle of thermal balance,a three-dimensional numerical model of water-heat coupling for ground source heat pump system in the Haimen area was established.The dynamic changes in the temperature field of shallow soil under different layout schemes during the operation of future ground source heat pump systems were predicted and analyzed.Through comparative analysis,an optimized layout plan for buried pipes was determined to overcome the problem of thermal accumulation in soil.The shallow geothermal energy recoverable resources of ground source heat pump system in the research area were evaluated.The results show that the development of ground source heat pump systems in the Haimen area can be divided into 6 zones,with a spacing of 29～39m between buried pipes in each zone.This can ensure that the soil temperature rise does not exceed 0.5℃within the next 10 years of operation,and the sustainable exploitation of geothermal energy.Under this plan,the exploitable resource potential of the buried pipe ground source heat pump system in the research area is 3.851 157×104m2/km2 in summer,and 7.586 812×104m2/km2in winter.
heat balanceground source heat pump systemheat accumulationshallow geothermal energy resourcesplanning evaluationHaimen city in Jiangsu
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