Results 151 to 160 of about 369 (185)
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Multipole method to calculate borehole thermal resistances in a borehole heat exchanger
HVAC&R Research, 2011Ground-source heat pump systems use borehole heat exchangers to transfer heat to and from the ground. An important feature is the local thermal resistances between the heat carrier flow channels in the borehole and the surrounding ground. The counter-flow heat exchange between the pipes is also important, particularly for the axial temperature ...
Johan Claesson, Göran Hellström
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Evaluation of a Coaxial Borehole Heat Exchanger Prototype
2010 14th International Heat Transfer Conference, Volume 4, 2010Different borehole heat exchanger designs have been discussed for many years. However, the U-pipe design has dominated the market, and the introduction of new designs has been practically lacking. The interest for innovation within this field is rapidly increasing and other designs are being introduced on the market. This paper presents a general state
Jose´ Acun˜a +2 more
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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.This thesis was a recipient of the Research Masters Award in recognition of the originality and high standard of the research and the impact of ...openaire +1 more source
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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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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