Multi-objective optimization for building retrofit strategies: A model and an application: Fid-Bau Portal

Multi-objective optimization for building retrofit strategies: A model and an application

Asadi, Ehsan / da Silva, Manuel Gameiro / Antunes, Carlos Henggeler / Dias, Luís

Highlights ► We present a multi-objective optimization model to assess technology choices in the built environment. ► The model allows for simultaneous consideration of all available combinations of retrofit actions. ► The model is used to provide a compromise solution for a case study. ► Tchebycheff programming employed for the solution of model under study. ► The results show the feasibility of this methodology, and highlight the potential problems.

Abstract Due to growing limitations on land use and awareness of sustainability concerns, the building retrofit market has faced increasing opportunities worldwide. Several technological/constructive options are available to improve energy efficiency and indoor environmental quality in buildings. The identification of the most appropriate retrofitting options is a topic of outstanding importance given the potential costs and impacts involved. This paper presents a multi-objective optimization model to assist stakeholders in the definition of intervention measures aimed at minimizing the energy use in the building in a cost effective manner, while satisfying the occupant needs and requirements. An existing house needing refurbishment is taken as a case study to demonstrate the feasibility of the proposed multi-objective model in a real-world situation. The results corroborate the practicability of this approach and highlight potential problems that may arise.