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首页> 外文会议>International Conference on Enhanced Building Operations; 20061106-08; Shenzhen(CN) >Modeling of Heat Transfer in Geothermal Heat Exchangers
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Modeling of Heat Transfer in Geothermal Heat Exchangers

机译：地热热交换器中的传热模型

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Ground-coupled heat pump (GCHP) systems have been gaining increasing popularity for space conditioning in residential and commercial buildings. The geothermal heat exchanger (GHE) is devised for extraction or injection of thermal energy from/into the ground. This paper summarizes the authors' studies on heat transfer in ground-coupled heat pump systems. Taking the fluid axial convective heat transfer and thermal "short-circuiting" among U-tube legs into account, a quasi-3-D model has been solved for heat transfer inside boreholes. The transient 2-D temperature response in a semi-infinite medium with a line-source of finite length has also been derived for heat conduction outside boreholes. In order to investigate the impact of groundwater advection on the performance of ground heat exchangers, an analytical solution is obtained for a line heat source in an infinite porous medium with groundwater advection. These explicit expressions have more solid theoretical basis, and can be easily incorporated into computer programs for thermal analysis and engineering design of ground heat exchangers.
机译：地面耦合热泵（GCHP）系统在住宅和商业建筑的空间调节中越来越受欢迎。地热热交换器（GHE）专为从地面提取热能或向地面注入热能而设计。本文总结了作者在地面耦合热泵系统中的传热研究。考虑到U形管支腿之间的流体轴向对流传热和热“短路”，已经解决了准3-D模型用于井眼内部传热的问题。对于在井外的热传导，还推导了具有无限长度的线源的半无限介质中的瞬态二维温度响应。为了研究地下水对流对地面换热器性能的影响，获得了具有地下水对流的无限多孔介质中管线热源的解析解。这些明确的表述具有更扎实的理论基础，可以轻松地并入计算机程序中以进行地下热交换器的热分析和工程设计。

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