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Title: A new method for calculation of short time-step g-functions of vertical ground heat exchangers
Authors: Wei, Jianping
Wang, Lei
Jia, Lei
Cai, Wenjian
Keywords: Ground heat exchangers
Issue Date: 2016
Source: Wei, J., Wang, L., Jia, L., & Cai, W. (2016). A new method for calculation of short time-step g-functions of vertical ground heat exchangers. Applied Thermal Engineering, 99, 776-783.
Series/Report no.: Applied Thermal Engineering
Abstract: The composite medium infinite line source model (CMILS) was recently developed to describe the heat transfer of borehole ground heat exchanges. But this model is very complicated and time-consuming to calculate the solutions, which limit its practical applications. This paper presents a method to simplify the CMILS model and develops short time-step response g-functions using the simplified CMILS model. The advantage of the new short time-step response g-functions is that they are simple in calculation with comparable accuracy compared with CMILS model. Simulation studies show that g-functions calculated by simplified CMILS model match nicely with the experimental data. Detailed comparisons are also carried out between the simplified CMILS model and other numerical or analytical models through simulation.
ISSN: 1359-4311
DOI: 10.1016/j.applthermaleng.2016.01.105
Schools: School of Electrical and Electronic Engineering 
Rights: © 2016 Elsevier Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Applied Thermal Engineering, Elsevier Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
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