Long-term performance of a hybrid ground source heat pump system with different borehole fields

Research output: Contribution to conferencePaperScientificpeer-review

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 languageEnglish
Publication statusPublished - 2023
MoE publication typeNot Eligible
EventInternational Conference on Sustainable Development in the Building and Environment - Espoo, Finland
Duration: 14 Aug 202318 Aug 2023
Conference number: 11

Conference

ConferenceInternational Conference on Sustainable Development in the Building and Environment
Abbreviated titleSuDBE
Country/TerritoryFinland
CityEspoo
Period14/08/202318/08/2023

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