A new constant heat flux model for vertical U-tube ground heat exchangers

被引：14
|
作者：
Li, Zhongjian [1 ]
机构：
[1] United Technol Res Ctr China Ltd, Shanghai 200120, Peoples R China
来源：
ENERGY AND BUILDINGS | 2012年 / 45卷
关键词：
Geothermal energy utilization systems; Vertical U-tube ground heat exchangers; Cumulative constant heat flux; Borehole resistance; Short time-step temperature response factors; SIMULATION;
D O I：
10.1016/j.enbuild.2011.11.026
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Vertical U-tube ground heat exchangers (GHEs) are a key component in geothermal energy utilization systems like ground source heat pumps (GSHPs). This paper presents a new constant heat flux model of its. Different from the existing uniform constant heat flux (UCHF) model, the model proposed in this paper is a cumulative constant heat flux (CCHF) model. The model is developed by reconstructing an experiment-verified three-dimensional unstructured finite-volume model. Applying the model, the borehole resistance with any geometric structure can be found. In addition, it may be used to develop the short time-step temperature response factors (TREs) for simulating the behavior of the GHE on a short-time-step basis (one hour or less). (c) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：311 / 316
页数：6
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