Optimal scheduling of modernization measures for typical non-residential buildings

Jan Richarz, Sarah Henn, Tanja Osterhage and Dirk Müller

Energy, 2022, vol. 238, issue PA

Abstract: Existing non-residential buildings account for a significant proportion of the energy consumption of the European building stock. Modernizing these buildings can significantly contribute to declared emission reduction targets. Modernization measures are rarely realized in the life cycle of buildings but have long-term effects on their energetic performance. Therefore, it is not only essential to identify future-oriented modernization measures but also to schedule them over the life cycle of a building. For this purpose, we present a mixed-integer linear program that schedules measures for a building energy system including envelope and supply system. The program determines not only the optimal combination of modernization measures but also the respective optimal point of time when each measure shall be realized. A multi-objective optimization is conducted to minimize carbon emissions and net present value. Thermal demand profiles serve as input for the optimization model and are calculated preliminary using dynamic simulations. Constraints and boundary conditions are specified separately for each prospective year of the schedule's time horizon. Results showed that the constitution of a building energy system changes several times throughout a schedule. Determined Pareto-efficient solutions reveal that carbon emissions could be saved more cost-efficiently than with approaches without scheduling.

Keywords: Building energy system; Modernization schedule; Mixed-integer linear programming; Multi-objective; Optimization (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:238:y:2022:i:pa:s0360544221021198

DOI: 10.1016/j.energy.2021.121871

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