A composite cylindrical model and its application in analysis of thermal response and performance for energy pile

被引:59
作者
Hu, Pingfang [1 ]
Zha, Jing [1 ]
Lei, Fei [1 ]
Zhu, Na [1 ]
Wu, Tianhua [2 ]
机构
[1] Huazhong Univ Sci & Technol, Sch Environm Sci & Engn, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R China
基金
中国国家自然科学基金;
关键词
Energy pile; Heat exchanger; Composite cylindrical model; Thermal response test (TRT); HEAT-TRANSFER; BOREHOLE; TEMPERATURE; RESISTANCE; PIPE;
D O I
10.1016/j.enbuild.2014.07.046
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Energy pile is a special vertical heat exchanger with the advantage of saving land area for buried pipe in recent years. Based on the composite line source model and cylindrical model, this paper presents a composite cylindrical model, and the heat capacity of pile in the borehole in ground source heat pump system (GSHP) was considered in the model. The model can be used in energy pile with a large diameter. It was validated by comparing to a 3-D numerical model which had been compared with a measured data set. The thermal performance of various layout forms of heat exchangers in energy pile was analyzed. In addition, the model was applied to a project of thermal response test (TRT) to estimate the thermal property parameters of soil. The simulation results showed that the composite cylindrical model have a better agreement from start of the test with measurement data. The model gives a new simulation tool in analysis of performance and TRT for energy pile. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:324 / 332
页数:9
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