期刊
RENEWABLE ENERGY
卷 36, 期 1, 页码 315-324出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2010.06.044
关键词
Geothermal; Heat pump; Ground heat exchanger; Thermal response test; Thermal conductivity; Waste rock
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- NSERC
- Fonds quebecois de la recherche sur la nature et les technologies (FQRNT)
- American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
- Canadian Foundation for Geotechnique (CFG)
- Geological Society of America (GSA)
- Society of Economic Geologists (SEG)
- Canadian Institute of Mining-Thetford Mines Branch (CIM-TM)
The Kelvin line-source equation, used to analyze thermal response tests, describes conductive heat transfer in a homogeneous medium with a constant temperature at infinite boundaries. The equation is based on assumptions that are valid for most ground-coupled heat pump environments with the exception of geological settings where there is significant groundwater flow, heterogeneous distribution of subsurface properties, a high geothermal gradient or significant atmospheric temperature variations. To address these specific cases, an alternative method to analyze thermal response tests was developed. The method consists in estimating parameters by reproducing the output temperature signal recorded during a test with a numerical groundwater flow and heat transfer model. The input temperature signal is specified at the entrance of the ground heat exchanger, where flow and heat transfer are computed in 2D planes representing piping and whose contributions are added to the 3D porous medium. Results obtained with this method are compared to those of the line-source model for a test performed under standard conditions. A second test conducted in waste rock at the South Dump of the Doyon Mine, where conditions deviate from the line-source assumptions, is analyzed with the numerical model. The numerical model improves the representation of the physical processes involved during a thermal response test compared to the line-source equation, without a significant increase in computational time. (c) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据