Long-term performance analysis of a hybrid GSHP system for a large educational building in Finland

Tianchen Xue, Juha Jokisalo, Risto Kosonen, Yuchen Ju, Mika Vuolle, Victoria Nadas, Federica Marongiu

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


Ground source heat pump (GSHP) system is widely used for heating or cooling in many countries. However, in cold regions, the GSHP system may face performance deterioration due to excessive underground thermal imbalance. Therefore, hybrid GSHP systems with auxiliary heat sources are proposed for overcoming this problem. This study investigated the long-term performance of a hybrid GSHP system assisted by district heating and a chiller for a large educational building in Finland. The studied building and the hybrid GSHP system were modelled in IDA ICE 4.8. Two simulation cases were designed and compared to investigate the effects of dimensioning GSHP heating capacity on the system performance and energy consumption. The result showed that by reducing the GSHP heating capacity, in the last heating season the minimum brine temperature was increased by 3.1 ℃ and the heat pump COP was increased by 5 % compared to the reference case. The total electricity consumption in the case with the reduced GSHP heating capacity was reduced by 7 %, while in contrast the entire district heating consumption was increased by 50 %.
Original languageEnglish
Title of host publicationHealthy Buildings Europe 2023
Subtitle of host publicationBeyond Disciplinary Boundaries
PublisherCurran Associates Inc.
ISBN (Print)978-1-7138-7715-8
Publication statusPublished - 2023
MoE publication typeA4 Conference publication
EventHealthy Buildings Europe - Aachen, Germany
Duration: 11 Jun 202314 Jun 2023


ConferenceHealthy Buildings Europe


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