مقاله A moving finite line source model to simulate borehole heat exchangers with groundwater advection : تی پی بین

خلاصه مقاله

Available analytical models for the thermal analysis of ground source heat pumps (GSHPs) either neglect groundwater flow or axial effects. In the present study a new analytical approach which considers both effects is developed. Comparison with existing analytical solutions based on the finite and infinite line source theory is carried out. This study shows that in general the heat transfer at the borehole heat exchanger (BHE) is affected by groundwater flow and axial effects. The latter is even more important for long simulation times and short borehole lengths. At the borehole wall the influence of the axial effect is restricted to Peclet numbers lower than 10, assuming the BHE length as characteristic length. Moreover, the influence of groundwater flow is negligible for Peclet numbers lower than 1.2. As a result for Peclet numbers between 1.2 and 10 the combined effect of groundwater flow and axial effects has to be accounted for when evaluating the temperature response of a BHE at the borehole wall and thus the use of the moving finite line source model is required.

نویسندگان

Nelson Molina-Giraldo [ University of Tübingen, Center for Applied Geoscience (ZAG), Sigwartstrasse 10, 72076 Tübingen, Germany ]

Philipp Blum [ Karlsruhe Institute of Technology (KIT), Institute for Applied Geosciences (AGW), Kaiserstraße 12, 76131 Karlsruhe, Germany ]

Ke Zhu [ University of Tübingen, Center for Applied Geoscience (ZAG), Sigwartstrasse 10, 72076 Tübingen, Germany ]

Peter Bayer [ ETH Zürich, Engineering Geology, Sonneggstrasse 5, 8092 Zurich, Switzerland ]

Zhaohong Fang [ Shandong Jianzhu University, Fengming Road, Lingang Development Zone, Jinan 250101, China ]

کلمات کلیدی

Ground source heat pump Analytical solution Borehole heat exchanger Finite length Line source

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International Journal of Thermal Sciences

The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review.

حوزه های تحت پوشش : Thermal Sciences