Study Of Underground Aquifer Energy Storage System On Turpan Depression

The high-speed development of economy has closely relationship with the drying up of traditional fossil energy and the increasingly significant mission of environmental protection.So it will be Chinese strategic development objective in the new era that developing continuable energy in the base of local conditions.The geothermal energy is a kind of continuable energy that has been used early,but it still have a large potential for exploitation.Turpan is a important node city for Chinese‘the Belt and Road'initiative,so the traditional heating system should be reformed imperatively.This article is designed to investigate the possibility of proceeding aquifer thermal energy storage and utilization in using natural heat source in Turpan Depression.All tasks are to provide a technical support to local underground aquifer thermal energy storage and to serve for the practical production.Firstly this article reference and collect widely literatures of underground aquifer thermal energy storage to research and master the theory of aquifer thermal energy storage;meanwhile explore relevant geological material of Turpan Depression to learn about its condition of areal geology and hydrogeology.Next researchers went to the filed of experiment to collect the date of various temperature and gather filed soil.Then when we backed to school,we did indoor soil test in using filed soil and analyzed temperature data from filed to research the variations characteristic of grand temperature in Turpan Depression.In the end,we built groundwater dynamic and thermodynamic modal and made numerical analysis for energy storage characteristic of underground aquifer to study the variations characteristic of underwater dynamic and thermodynamic filed in Turpan Depression underground aquifer.Points of the whole research work could be concluded that:?1?Make sure that gobi surface in Turpan Depression is fit for the high heat source of aquifer storage,and hydrogeology nearby Aydingkol Lake is satisfied with aquifer thermal energy storage.?2?Analyze that the time of aquifer storage is 11:30²3:30 every day,the time of aquifer storage is 15^th May to 15^th September every year,and the average temperature of gobi surface is 48.8?.?3?Calculate that soil natural density in gobi surface 1.35 g/cm³,moisture content is 1.675%,the composition of soil is floury soil the specific heat of soil is0.791J/?g???,the heat conductivity coefficient of soil is 1.062×10^-3kW/?m·??,and the thermal diffusivity of soil is 0.994×10^-6m²/s.?4?A doublet-well aquifer storage system is designed which the gap of two wells is 100 meters and a monitoring well is installed in the middle.The top and bottom elevation of well is-170 meters and-220 meters and the diameter of well is 300millimeters.?5?Through the simulation verification of FlowHeat,when the volume of pumping water in Heating period is half of the water injection in Energy storage period,the scheme of aquifer thermal energy storage is feasible.