Determining Soil Thermal Conductivity Through Numerical Simulation of a Heating Test on a Heat Exchanger Pile

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• 作者：K. L. Yu (1)
  R. M. Singh (2)
  A. Bouazza (1)
  H. H. Bui (1)
  
  1. Monash University ; Melbourne ; Victoria ; 3800 ; Australia
  2. University of Surrey ; Guildford ; GU2 7XH ; UK
  
• 关键词：Heat exchanger pile ; Heat absorber pipes ; Heat transfer ; Thermal conductivity ; Thermal response test
• 刊名：Geotechnical and Geological Engineering
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：33
• 期：2
• 页码：239-252
• 全文大小：1,543 KB
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  30. Wang B, Bouazza A, Singh RM, Barry-Macaulay D, Haberfield C, Chapman G, Baycan S (2013) Field investigation of a geothermal energy pile: initial observations, In: Proceedings of the 18th international conference on soil mechanics and geotechnical engineering. Paris, France, pp 3415鈥?418
  31. Wang B, Bouazza A, Singh M, Haberfield C, Barry-Macaulay D, Baycan S (2014) Post-temperature effects on shaft capacity of a full scale geothermal energy pile. J Geotech Geoenviron Eng. doi:10.1061/(ASCE)GT.1943-5606.0001266
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geotechnical Engineering
  Hydrogeology
  Terrestrial Pollution
  Waste Management and Waste Technology
  Civil Engineering
  
• 出版者：Springer Netherlands
• ISSN：1573-1529

文摘

Heat exchanger pile foundations have a great potential of providing space heating and cooling to built structures. This technology is a variant of vertical borehole heat exchangers. A heat exchanger pile has heat absorber pipes firmly attached to its reinforcement cage. Heat carrier fluid circulates inside the pipes to transfer heat energy between the piles and the surrounding ground. Borehole heat exchangers technology is well established but the heat exchanger pile technology is relatively new and requires further investigation of its heat transfer process. The heat transfer process that affects the thermal performance of a heat exchanger pile system is highly dependent on the thermal conductivity of the surrounding ground. This paper presents a numerical prediction of a thermal conductivity ground profile based on a field heating test conducted on a heat exchanger pile. The thermal conductivity determined from the numerical simulation was compared with the ones evaluated from field and laboratory experiments. It was found that the thermal conductivity quantified numerically was in close agreement with the laboratory test results, whereas it differed from the field experimental value.