Abstract
In cold regions, ground thermal imbalance poses a challenge to the efficient and sustainable operation of ground source heat pump (GSHP). Significant evidence indicates that hybrid GSHP system is an innovative alternative to effectively address ground thermal imbalance and enhance overall system performance. This study presents a comparative analysis that evaluates the long-term performance of a hybrid GSHP system assisted by district heating and an air-cooled chiller. 25-year simulations were performed in IDA ICE 4.8 for two hybrid GSHP system cases with different borehole numbers. The energy performance, life cycle cost and CO2 emissions were compared and analyzed for the two studied cases. The results show that increasing the borehole number can help improve the long-term hybrid GSHP system performance and reduce the total district heating consumption. By increasing the borehole number by 30 %, the minimum brine temperature was increased by 2.4 ℃ and the average heat pump COP was improved by 2 % in the last heating season. Besides, over the 25-year lifespan, the total district heating consumption was reduced by 6 % with a 30 % increase in borehole number.
Original language | English |
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Publication status | Published - 2023 |
MoE publication type | Not Eligible |
Event | International Conference on Sustainable Development in the Building and Environment - Espoo, Finland Duration: 14 Aug 2023 → 18 Aug 2023 Conference number: 11 |
Conference
Conference | International Conference on Sustainable Development in the Building and Environment |
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Abbreviated title | SuDBE |
Country/Territory | Finland |
City | Espoo |
Period | 14/08/2023 → 18/08/2023 |