CH-24-C016 - Multi-Criteria Evaluation of Commercial Buildings with Poly-Generation System in South Korea

The present study analyzed the energy performance of commercial buildings when an internal combustion engine (ICE) and solid oxide fuel cell (SOFC) based poly-generation systems are applied to the buildings, which shows extremely limited studies in previous studies. Hospital and office buildings are selected as building types, which show significant differences in building load profiles. The simulation model of the poly-generation system is developed with component validation based on experiment, product, and literature data. A hybrid control method for cooling and heating is employed to enhance the utilization of power and heat generated from the prime mover. A battery electric storage system and thermal storage system are applied to mitigate the discrepancy between produced energy and building energy demand. In addition, photovoltaic thermal collectors installed on the roof of the building generate additional power and cope with part of the domestic hot water load through heat recovery. In the results, compared to the conventional system, the primary energy consumption is reduced by 30.2% with the ICE and 45.2% with the SOFC in the hospital, and 1.8% with the ICE and 37.2% with the SOFC in the office building. Carbon dioxide emissions are diminished by 28.1% with the ICE and 43.5% with the SOFC in the hospital, and -3.9% with the ICE and 33.2% with the SOFC in the office building. In addition, the economic feasibility of the poly-generation system is evaluated under the life cycle cost method.