A method and case study of thermal response test with unstable heat rate

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• 作者：Pingfang Hu^a ; ^{pingfanghu21@163.com} ; Qingfeng Meng^a ; Qiming Sun^a ; Na Zhu^a ; Changsheng Guan^b
• 关键词：Variable-rate heat ; Ground thermal properties ; Unsteady state method
• 刊名：Energy and Buildings
• 出版年：2012
• 期刊代码：12_03787788
• 类别：pw
• 出版时间：May, 2012
• 卷：48
• 期：Complete
• 页码：199-205
• 文件大小：1397 K

摘要

This paper proposed a new method based on modified composite model in the thermal response test (TRT) in the variable heat rate case study. The new method considered the unsteady-state heat transfer in the borehole instead of the line-source model assumption. A Matlab program was compiled which can perform inversion calculation to obtain the ground thermal properties. The superposition principle was used to process the variable-rate problem. This new method was applied to two thermal response tests. The simulation value based on the method shows a good agreement with the measurement data of water temperature. The proposed method would save the time and reduce the cost of TRT when power fluctuation or failure occurs.