Evaluating Insulation, Glazing and Airtightness Options for Passivhaus EnerPHit Retrofitting of a Dwelling in China's Hot Summer-Cold Winter Climate Region

Liu, Chenfei, Sharples, Stephen ORCID: 0000-0002-6309-9672 and Mohammadpourkarbasi, Haniyeh ORCID: 0000-0002-5397-295X (2021) Evaluating Insulation, Glazing and Airtightness Options for Passivhaus EnerPHit Retrofitting of a Dwelling in China's Hot Summer-Cold Winter Climate Region. ENERGIES, 14 (21). p. 6950.

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Official URL: http://dx.doi.org/10.3390/en14216950

Abstract

<jats:p>Passivhaus EnerPHit is a rigorous retrofit energy standard for buildings, based on high thermal insulation and airtightness levels, which aims to significantly reduce building energy consumption during operation. However, extra retrofit materials are required to achieve this standard, which raises a contradiction between how to balance the environmental impacts of the retrofitting material inputs and extremely low energy consumption after retrofit. This motivated the analysis in this paper, which aimed to evaluate the possibilities of reducing the required retrofitting material inputs when trying to achieve the EnerPHit energy standard using a typical suburban dwelling in China’s hot summer–cold winter climate region as a case study. Firstly, how the insulation performance of each envelope component affected the building’s energy consumption was analysed. Based on this, sensitivity simulations of combinations of different insulation levels with different fabric components were investigated under four scenarios of insulation levels, airtightness and glazing choice. The final proposed retrofitting plans achieved the EnerPHit standard with insulation materials’ savings between 18% to 58% compared to a baseline retrofit plan, and this led, in turn, to 3.9 to 12.6 tonnes of carbon reductions. Moreover, an energy-saving of 87% in heating and 70% in cooling was achieved compared with the pre-retrofit dwelling.</jats:p>

Item Type:	Article
Uncontrolled Keywords:	Passivhaus EnerPHit standard, energy retrofitting, building envelope, parametric analysis, energy efficiency
Divisions:	Faculty of Humanities and Social Sciences > School of the Arts
Depositing User:	Symplectic Admin
Date Deposited:	22 Oct 2021 10:39
Last Modified:	18 Jan 2023 21:26
DOI:	10.3390/en14216950
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3141260