Research on the energy conservation technology of combined station based on geothermal resource utilization
In order to reduce the comprehensive energy consumption and carbon emissions of the combined station,based on the statistical analysis of the process load in the station,the energy conservation process has been constructed through the utilization of geothermal resources,and the HYSYS software has been used to build a simulation process.The heating and power supply processes have been completed through direct heat transfer and organic Rankine cycle processes respectively,and the influence of different cycle power genera-tion working mediums on system indicators has been analyzed.Finally,the energy conservation effect has been evaluated.The results show that the heat utilization of associated gas is the main energy consumption form of the station,and the heat load accounts for 98.8%of the total load.When the heat source temperature is be-low 95℃,R134 working medium will be used,while R600a working medium will be used when the heat source temperature is above 95℃.When the exergic loss of evaporator is up to the greatest,the exergic loss and exergic efficiency will be decreased by increasing the evaporator area,optimizing pipe arrangement,se-lecting materials with good thermal conductivity,and conducting regular cleaning and maintenance.The sys-tem can not only meet the demand of heat load in the station,but also can meet the most demand of electricity load,which can realize the green and low-carbon operation of the station.The annual fuel gas can be saved by 443×104 m3 and the power saving can be saved by 47.5×104 kWh,with good economic and environmental ben-efits.
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