Optimization Analysis Of Recharge Technology And Optimum Well Spacing Of Groundwater-source Heat Pump System

Groundwater-source Heat Pump System has outstanding contributions on the aspects of improving the quality of atmospheric environment,save energy and reduce pollution,but it will lead to several geological environmental issues.Uneven ground subsidence and exhaustion of the groundwater resources will happened because of the immature Groundwater Recharge Technology.The scientific and reasonable layout of pumping wells and recharge wells will produce thermal breakthrough,which will reduce the heat transfer efficiency of Groundwater-source Heat Pump System.Around the pumping wells and recharge wells,the temperature field of local ground water changes continuously and in different degrees,which will bring about significant changes in the environment of microbial growth and chemical composition of groundwater.And then lead to physical clogging,chemical clogging and scaling problems,resulting in increasing of engineering maintenance costs.In recent years,the application of Water Source Heat Pump Air-conditioning System is more and more widely,but the planning and design of pumping well group is lack of theoretical support for the shortcoming of technologies,and the present situation about the operation of some Water Source Heat Pump Air-conditioning System which had established was less than satisfactory.Recharge is the decisive factor in the operation of Water Source Heat Pump,In this paper,the water quality of the water source heat pump,the amount of recharge and the way of recharging are analyzed,and then we get the reason of poor irrigation,summed up the way to avoid the problem.The application of water source heat pump system is limited by the conditions of region and climate.Different regions have different geological structures,which have different requirements for the water source,water recharge and so on.Due to the various factors in the design of pumping wells of Groundwater-source Heat Pump System,it is necessary to consider the various factors to determine the appropriate spacing in order to facilitate the efficient operation of groundwater-source heat pump system.In this paper,the reference distance of pumping well in water source heat pump is determined by theoretical analysis,and we also investigated the project of groundwater-source heat pump in Shenyang.Then we undersood the current situation of recharging and the temperature changes in the system of application of Groundwater-source Heat Pump.According to the experience of practical projects,the reasonable ratio of pumping and the reference distance of pumping well are determined,whichprovided theoretical basis for pumping well spacing arrangement of Water Source Heat Pump Air-conditioning System.This study attained the following achievements:1)According to the different recharge methods of water source heat pump,this paper analyzed the causes of the poor recharge,and put forward the way to avoid the poor recharge.It was helpful to guide the design of Groundwater-source Heat Pump System.2)The reference distance of pumping wells in Shenyang was determined by formula analytic.When the aquifer was gravel,well spacing should not be less than 100 m.When it were coarse and the sand,well spacing should not be less than 90 m and 85 m.And the aquifer was fine sand,well spacing should not be less than 80 m.The determination of pumping well spacing was affected by many factors.According to the seven research projects,well spacing of water source heat pump was about 30 m to 50 m,pumping ratio were between 1:2-1:3.In this paper,we suggested that the well spacing should not be less than 50 m,it was recommended to ensure that the recharge ratio was at least 1:3.According to different hydrogeological conditions,it was necessary for us to have the rational choice of using the system of Water Source Heat Pump.In this paper,we proposed that Water Source Heat Pump Project hot and cold dual supply,and should not be heat aloneIt was very important to clean and manage the later heat source well in order to ensure the normal operation of Groundwater-source Heat Pump System.