Research On Key Technology Of Heating And Heat Exchange System For Geothermal Heating

With the increasing demand for energy,fossil energy is decreasing.The demand for the quality of living environment is increasing day by day.The development of new green energyin dry and hot rock geothermal has been developed rapidly in developed countries.In the low-carbon economy model,the development and utilization of deep clean geothermal resources,in recent years,especially for the development and utilization of dry hot rock resources has become a subject that are actively studied in a lot of developed countries,and dry hot rock geothermal resources development and application in the world also belongs to the initial stage,for the development of dry geothermal geothermal energy in China,it is in the theoretical research stage.Heating in northeast China is an eternal demand.In the past,the traditional heating method is not conducive to the sustainable development of resources.Based on the domestic and foreign literature,based on the international hot and humid rock development example,based on the advantages of dry and hot rock resources.In Shenyang,the development and utilization of dry and hot rock resources for the implementation of the feasibility and advantages of the formation of the use of dry hot rock resources in winter heating ideas and system ideas;research shows dry and hot rock resources in the process of heating the key technology,rock thermal conductivity and Rock and water heat exchange capacity,well size and insulation measures is to achieve the key issues of dry and hot rock heating,while hot spring water is part of the underground heat,it is clear that the heat of hot spring water is relatively more economical and convenient but the underground hot spring water is not.It is also necessary to study the structure of the heat exchanger,so it is necessary to design the structure of the heat exchanger.In this paper,the heat exchanger is designed to be used for the heat transfer.The special characteristics of the hot spring design of a new type of bellows heat exchanger,and through the finite element numerical simulation of dry heat and heat exchanger heat exchange and pressure drop analysis,respectively,at different flow rates and geothermal gradient of water.The effect of the required depth and pressure drop on the required depth and the effect of the water on the desired bellows when the water is heated to the same temperature in different structures,and the heat transfer is calculated.Finally,Rock heat transfer system foreconomic analysi,the entire system will be a larger investment,but long-term operation will benefit greatly.Studies have shown that if the above dry and hot rock heating technology to get further attention and solve the problem,then the success of dry and hot rock for the cold zone to bring a technical breakthrough.