Monday, January 21st, 2019

Energy efficiency opportunities in the residential sector and their feasibility

Publication year: 2012brbSource:/b Energy, Available online 26 February 2012brKenichi Wada, Keigo Akimoto, Fuminori Sano, Junichiro Oda, Takashi HommabrThe objective of this paper is to address the question of what would be the real impact of energy efficiency improvements on the reduction of GHG (greenhouse gas) emissions through the deployment of energy-efficient technologies. We study the cost effectiveness of replacing current appliances with more efficient models, taking into consideration the implicit discount rate observed in people’s purchasing behavior. This is followed by a discussion of why the efficiency gap exists and how large it is. If the world were to successfully implement every negative- or zero-cost measure, the CO2abatement potential in the global residential and commercial sector in 2020, on a conservative estimate, would be 1.4 Gt of CO2, roughly equivalent to the current CO2emissions of India as the world fourth largest emitter. If a longer payback period is allowed, a further 1.2 Gt of opportunities, which almost amount to the current CO2emissions of Japan as the world’s fifth largest emitter of CO2, could be gained globally at below zero-cost in 2020.brh3 class=h3Highlights/h3► We address the question of what would be the realizable potential of energy efficiency improvements. ► On a conservative estimate, CO 2 abatement potential would be 1.4 Gt in the residential and commercial sector. ► If people behave more rationally, a further 1.2 Gt of opportunities could be gained.

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