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Arrangement Strategy of Ground Heat Exchanger with Groundwater
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Journal Article
Arrangement Strategy of Ground Heat Exchanger with Groundwater
2012
Overview
The orientation strategy of side pipe and the heat transfer performance of six ground heat exchangers （GHEs） were optimized by numerical simulation, with soil being treated as a porous medium. An experiment on the heat transfer of four GHEs was carried out in 2010. Results indicate that the velocity field is disturbed by GHEs. The optimal orientation strategy of side pipe is that the upward pipe is located upstream and the downward pipe down- stream. The space between GHEs should be appropriately adjusted, depending on the direction and flow velocity. Groups of GHEs should be installed perpendicular to the mainstream in a single row, but if the acreage does not meet the requirements, GHEs should be installed in staggered multiple rows. Fewer GHEs parallel to the mainstream strengthen the heat transfer. Moreover, numerical results agree well with the test data, with the maximum relative error being less than 7.7%.
