The Numerical Simulation And Experimental Study Of The Aquifer Energy Storage System

Underground aquifer energy storage, an energy conservation technology, which isclosely related to the development of heat pump technology, is one of the effectivemethods to solve the energy crisis, expand the energy resources and protect theenvironment in some countries in the world. As the popularization and application of theunderground aquifer energy storage technology, the influence of the aquifer geothermalfield is receiving increasingly attentions.This article is about the influence which led by parameters of aquifer energy storagedouble-wells systems on the aquifer geothermal field. The researchers mainly engagedin the theoretical analysis, numerical simulation and experimental study to research,getting the following conclusions:Firstly, applying the groundwater seepage and heat transfer theory, establishing thegroundwater flow and heat transfixion of aquifer time needed for the mathematicalmodel of temperature field effect, and the migration of the unconsolidated confinedaquifer heat mathematical model, the researchers discussed the different groundwaterflow conditions and convection heat transfer of the influence of geothermal field basedon the first two models. The researchers analyze the groundwater pumping and fillingprocess production Wells heat breakthrough happened time needed for and relatedfactors of the relationships between.Secondly, Based on the use of software FLUENT, in the double-well system, theresearcher make the numerical simulation which arm at different parameters on theeffect of the aquifer temperature field, the parameters were the underground aquiferpermeability, thickness, the well filter tube length and relative position, and differentamount of pump and recharge water, the distance between the two wells, etc.. Researchthe variation and the final shape of the energy storage water mass along the newinterstifial flow field direction which after pumping water to reach a certain extent.Research the change relation between the vertical permeability and pumping periodtemperature, and the change relation between the level permeability and pumping periodtemperature. When the aquifer thickness remain unchanged, with the increase of thelength of the filter tube and the decrease of the distance between the part of pump andrecharge, research the temperature variation of the pumping period. In other conditions remain unchanged, with the increase of the aquifer thickness, the decrease of the amountof pump and recharge water, the variation of the filter tube distance between the part ofpump and recharge, research the temperature variation of the pumping period. When thedistance between the pump-well and the recharge-well is bigger, research thetemperature variation of the pump-well, and make the theory research of the heattransfixion phenomenon and the distance between the two wells.Thirdly, by the experiments of underground Wells storage capacity, it’s proved thatthe recharge technology application in different well underground aquifer energystorage system is completely feasible; by the test of the underground Wells heataccumulation it’s proved that the temperature measuring point temperature after twomonths of heat storage average temperature of2.2℃, this shows that seasonal aquiferenergy storage technology in practical projects is feasible.