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Optimization of emission reducing energy retrofits in Finnish apartment buildings
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A4 Artikkeli konferenssijulkaisussa
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en
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6
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CLIMA 2019 Conference, 26th-29th May, 2019, Bucharest, Romania, E3S web of conferences ; Volume 111
Abstract
This study examined the cost-optimality of energy renovation on Finnish apartment buildings of different ages, built according to different energy performance requirements. Multi-objective optimization was utilized to minimize both CO2 emissions and life cycle cost (LCC). IDA-ICE simulations were performed to obtain the hourly heating demand of the buildings. Four building age classes and three heating systems (district heating, exhaust air heat pump and ground-source heat pump) were separately optimized. With district heating, it was possible to reduce emissions by 11%, while also reducing LCC. With heat pumps cost-savings could be achieved while reducing emissions by over 49%. With maximal (not cost-effective) investments, emissions could be reduced by more than 70% in all examined cases. In all cases, the cheapest solutions included solar electricity and sewage heat recovery. In old buildings, window upgrades and additional roof insulation were cost-effective. In new buildings, demand-based ventilation was included in all optimal solutions.
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Hirvonen, J, Jokisalo, J, Heljo, J & Kosonen, R 2019, Optimization of emission reducing energy retrofits in Finnish apartment buildings. in CLIMA 2019 Conference, 26th-29th May, 2019, Bucharest, Romania., 03002, E3S web of conferences, vol. 111, EDP Sciences, REHVA World Congress, Bucharest, Romania, 26/05/2019. https://doi.org/10.1051/e3sconf/201911103002