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Optimization for operating modes based on simulation of seasonal underground thermal energy storage

Optimization for operating modes based on simulation of seasonal underground thermal energy storage Abstract A simulation was performed, which concerned the feasibility of seasonal underground thermal energy storage (UTES) in Tianjin, China. The investigated system consisted of 8 boreholes. In summer, residual solar thermal energy was emitted into the soil surrounding the borehole heat exchangers through which the stored energy was extracted in winter with a ground coupled heat pump (GCHP) to provide a proper heating temperature. A simulation study was performed to study the influence of system operation modes on thermal recovery based on the experimental data of a GCHP system, local meteorological conditions and soil properties in Tianjin. The results indicate a thermal recovery ratio of less than 67% and different temperature distributions under three modes. Finally, an operation mode was suggested based on both lower loss and better thermal recovery in the UTES. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Frontiers in Energy" Springer Journals

Optimization for operating modes based on simulation of seasonal underground thermal energy storage

"Frontiers in Energy" , Volume 2 (3): 4 – Sep 1, 2008

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Publisher
Springer Journals
Copyright
2008 Higher Education Press and Springer-Verlag GmbH
ISSN
2095-1701
eISSN
1673-7504
DOI
10.1007/s11708-008-0053-y
Publisher site
See Article on Publisher Site

Abstract

Abstract A simulation was performed, which concerned the feasibility of seasonal underground thermal energy storage (UTES) in Tianjin, China. The investigated system consisted of 8 boreholes. In summer, residual solar thermal energy was emitted into the soil surrounding the borehole heat exchangers through which the stored energy was extracted in winter with a ground coupled heat pump (GCHP) to provide a proper heating temperature. A simulation study was performed to study the influence of system operation modes on thermal recovery based on the experimental data of a GCHP system, local meteorological conditions and soil properties in Tianjin. The results indicate a thermal recovery ratio of less than 67% and different temperature distributions under three modes. Finally, an operation mode was suggested based on both lower loss and better thermal recovery in the UTES.

Journal

"Frontiers in Energy"Springer Journals

Published: Sep 1, 2008

References