Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1742250 | Geothermics | 2015 | 10 Pages |
Abstract
Major findings of this work include: (1) coefficient of performance (COP) is estimated to be 3.9 for a typical winter day and energy efficiency ratio (EER) is assessed to be 8.0 for a typical summer day. These results indicate that the GSHP system has a higher efficiency for building cooling than building heating. (2) For a long-term period, the seasonal energy efficiency ratio (SEER) of the GSHP system is observed to increase by 8.7% annually, whereas the seasonal COP is decreased by 4.0% over a 4-year period. The heating and cooling performance of the GSHP system migrates in opposite trend is caused by the unevenly distributed heating and cooling load of the building. This phenomenon deserves serious attention in the design of future GSHP systems in order to avoid the reducing of energy efficiency over long-term operation.
Related Topics
Physical Sciences and Engineering
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Geochemistry and Petrology
Authors
Jin Luo, Joachim Rohn, Manfred Bayer, Anna Priess, Lucas Wilkmann, Wei Xiang,