Embodied Energy Consumption in the Residential Sector: A Case Study of Affordable Housing

Sustainability

Nicole Anderson¹  Zahirah Azizi¹  Gayan Wedawatta²  Niluka Domingo³  Ishara Rathnayake⁴ 

[1]Department of Architecture and Built Environment, Northumbria University, Newcastle upon Tyne NE7 7XA, UK

[2]Department of Civil Engineering, Aston University, Birmingham B4 7ET, UK

[3]School of Built Environment, Massey University, Auckland 0632, New Zealand

[4]UniSA STEM, University of South Australia, Mawson Lakes, SA 5095, Australia

关键词: affordable housing;    carbon emission;    case study;    embodied carbon;    embodied energy;    sustainable construction;   

DOI  :  10.3390/su14095051

来源: DOAJ

【 摘 要 】

Embodied energy has a significant effect on the total environmental impact of a project. However, emphasis is often placed primarily on operational energy, resulting in a knowledge gap about the current state of embodied energy use in affordable housing. To address this, the study investigates the level of embodied energy consumption in affordable housing, as well as the drivers, barriers, and techniques to reduce embodied energy. Based on a single embedded case study covering the period from cradle to end of construction, data were collected using embodied energy calculations of three affordable housing units in the project, semi-structured interviews with five design team members, and a cross-examination of findings with contract documents. The results were analysed using sensitivity analysis and thematic analysis. The findings revealed that all three house units fulfilled the baseline embodied carbon target of 800 kg CO₂/m² and both detached properties fell within the LETI (2020) target of 500 kg CO₂/m². However, all three properties would fail to meet the RIBA or 2030 LETI target of 300 kg CO₂/m². This suggests that improvements are necessary to achieve future targets. The results show that financial capabilities and operational energy prioritisation act as the main enabler and barrier for reducing embodied energy. Local contractors/suppliers, minimising material use or intensity, and modular construction were highlighted as the key reduction techniques that can be used to help achieve future targets concerning embodied carbon in residential developments. The study contributes significantly to understanding the current state of embodied energy use in affordable housing and provides new insights on how to deal with embodied energy if we are to meet future energy targets.

【 授权许可】

Unknown