Schwartz, Y; Raslan, RM; Mumovic, D; (2018) Refurbish or Replace: Optimizing Refurbished and New Building Designs for Life Cycle Carbon Footprint and Life Cycle Cost Minimisation. In: (Proceedings) Building Simulation and Optimization 2018, 4th IBSPA Conference. IBPS - England: Cambridge, UK.

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Abstract

The refurbishments and replacements of existing buildings can significantly contribute to CO2 emissions reductions in the built environment. This paper presents and tests a novel approach for supporting the decision-making process in assessing the performance of refurbished buildings and their replacements, to achieve life-cycle CO2 emissions reductions in the most economically viable way. The proposed method, incorporating generative design scripting, dynamic thermal simulations and Genetic Algorithms optimsiation, successfully identified a set of pareto-optimal models, which achieved minimal life cycle carbon footprint and a minimal cost. Findings indicate that optimal refurbishments can achieve between 7-38% lower CO2 emissions, over an assumed life span of 60 years, and cost between 5-20% less than optimal replacements.

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