摘要
单井回灌地源热泵系统是一项建筑节能的新技术,其地下换热器涉及复杂的地下水渗流及换热问题。要分析单井回灌地源热泵系统的地下传热过程,首先得解决系统运行过程中地下水流动问题。本文通过对单井系统地下流场的分析在简化假设的基础上建立了数学模型,通过数值计算表明承压含水层完整井系统抽水段与回灌段长度基本相等,井筒壁上降深及径向渗流速度沿井深方向基本程线性变化,系统回灌率受径向渗透系数影响较大。
The standing column well is a new technique with high efficiency and environmental benefit. Heat transfer analysis of the ground involves complex problems such as seepage flow in aquifer and heat transfer in porous medium. Determining the groundwater seepage flow is a precondition to solve the energy equation describing the heat transfer of the system. This paper studies the seepage flow and establishes mathematical model with some assumptions to simplify the problem. The numerical solution on example cases shows that the length of the well where ground water seepage comes in is equal with that ground water seepage flows out, the relationship between depth and drawdown in well is linear, the relationship between depth and seepage velocity in radial direction on well boundary is also a linear correlation, and the return ratio is remarkably influenced by the hydraulic conductivity in radial direction.
出处
《山东建筑大学学报》
2008年第3期230-234,共5页
Journal of Shandong Jianzhu University
基金
山东省自然科学基金资助项目(Y2005F24)
关键词
单井回灌
地源热泵
渗流
数学模型
承压含水层
standing column well
ground source heat pump
seepage flow
mathematical model
confined water
