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Nordic hospital buildings have a significantly ventilation heat loss, primarily due to the continuous operation of high airflow systems and the relatively low effectiveness of run-around heat recovery systems. Integrating exhaust air heat pumps (EAHPs) with run-around heat recovery and PV system has the potential to reduce the ventilation heat loss and save the energy costs. This study evaluates the energy and eco-nomic performance of a hybrid solution combining EAHP, run-around heat recovery, and PV systems in a newly built Finnish hospital. The cost-optimal sizes of the systems are investigated under current commercial energy tariffs. Numeric simulations are conducted by utilizing IDA ICE software and a developed customized EAHP component. Results show that enhanced run-around heat recovery efficiency, reduced EAHP capacity, and expanded PV integration can together lead to notable reductions in total energy use and LCC. The utilization of cost optimal combined EAHP, run-around heat recovery and PV system saves the total energy demand and LCC of the demo building by 29% and 16.6%, respectively.

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Cost-Optimal Dimensioning of Run-Around Heat Recovery, EAHP and PV System for a Nordic Hospital Building

  • 会议论文

  • 发表日期：

    2026年

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  • Jiayi Liu,
  • Yuchen Ju,
  • Xiaolei Yuan,
  • Risto Kosonen,
  • Juha Jokisalo,
  • Altti Meriläinen,
  • Antti Kosonen

摘要

Nordic hospital buildings have a significantly ventilation heat loss, primarily due to the continuous operation of high airflow systems and the relatively low effectiveness of run-around heat recovery systems. Integrating exhaust air heat pumps (EAHPs) with run-around heat recovery and PV system has the potential to reduce the ventilation heat loss and save the energy costs. This study evaluates the energy and eco-nomic performance of a hybrid solution combining EAHP, run-around heat recovery, and PV systems in a newly built Finnish hospital. The cost-optimal sizes of the systems are investigated under current commercial energy tariffs. Numeric simulations are conducted by utilizing IDA ICE software and a developed customized EAHP component. Results show that enhanced run-around heat recovery efficiency, reduced EAHP capacity, and expanded PV integration can together lead to notable reductions in total energy use and LCC. The utilization of cost optimal combined EAHP, run-around heat recovery and PV system saves the total energy demand and LCC of the demo building by 29% and 16.6%, respectively.