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Heat Transfer Research
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ISSN Print: 1064-2285
ISSN Online: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2012004565
pages 343-362

NUMERICAL INVESTIGATION OF GROUND-COUPLED VERTICAL BOREHOLE HEAT EXCHANGERS WITH GROUNDWATER ADVECTION

Marzio Piller
Department of Engineering and Architecture, University of Trieste, via A. Valerio 10, 34127 Trieste (TS), Italy
Alberto Liuzzo Scorpo
Dipartimento di Ingegneria Civile e Architettura, Universita degli Studi di Trieste, 34127 Trieste (ITALY)

ABSTRACT

Groundwater advection is commonly neglected in the design of ground-coupled vertical borehole heat exchangers. In this work, the efficiency of heat transfer from a vertical borehole with groundwater advection is investigated by numerical simulations. The actual borehole geometry is accounted for, resulting in a perturbed flow field. The present results are compared with the analytical solution for the transient, two-dimensional heat convection around a line heat source derived by Diao et al. (2004). A wide range of viable Peclet numbers is considered.


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