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Borehole resistance and vertical temperature profiles in coaxial borehole heat exchangers
Applied Energy, 2013Ground source heat pump systems are often coupled to the ground by circulating a fluid through vertical Borehole Heat Exchangers (BHEs). The design of a system requires estimates of the ground thermal conductivity and the borehole thermal resistance, which are usually determined by an in situ thermal response test on a completed borehole.
Richard A. Beier +3 more
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Spectral framework for geothermal borehole heat exchangers
International Journal of Numerical Methods for Heat & Fluid Flow, 2010PurposeThis paper aims to present a framework for deriving analytical and semi‐numerical models for coupled conductive‐convective heat transfer processes in a borehole heat exchanger subjected to general initial and boundary conditions.Design/methodology/approachThe discrete Fourier transform and the spectral element method have been utilized for ...
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Heat transfer analysis of ground heat exchangers with inclined boreholes
Applied Thermal Engineering, 2006Consisting of closed-loop of pipes buried in boreholes, ground heat exchangers (GHEs) are devised for extraction or injection of thermal energy from/into the ground. Evolved from the vertical borehole systems, the configuration of inclined boreholes is considered in order to reduce the land plots required to install the GHEs in densely populated areas.
Ping Cui, Hongxing Yang, Zhaohong Fang
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Heat Transfer Optimisation for Borehole Heat Exchangers
A thesis submitted in total fulfillment of the requirements for the degree of Master of Engineering to the School of Computing, Engineering and Mathematical Sciences, La Trobe University, Victoria, Australia.openaire +1 more source
Finite element simulation of coaxial borehole heat exchangers
2009Finite-element simulations of Coaxial Borehole Heat Exchangers (CBHEs) are performed by means of the software package COMSOL Multiphysics 3.4 (© Comsol, Inc.). The real 2-D axisymmetric unsteady heat conduction and convection problem is considered, both for winter and for summer working conditions.
E. ZANCHINI +2 more
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