Analysing energy saving and overheating risk of retrofitting Chinese surban dwellings to the Passivhaus EnerPHit standard

Liu, Chenfei, Sharples, Stephen and Mohammadpourkarbasi, Hanniyeh 2020. Analysing energy saving and overheating risk of retrofitting Chinese surban dwellings to the Passivhaus EnerPHit standard. Presented at: PLEA 2020: 35th International Conference on Passive and Low Energy Architecture, A Coruna, Spain, 1-3 September 2020.

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Abstract

Chinese suburban housing largely consists of uninsulated reinforced-concrete apartment blocks with poor insulation performance. Much energy is required to reach indoor thermal comfort in Chinese regions which have hot summer/cold winter climates. Retrofitting existing dwellings to a better energy performance standard might be preferable to new build as existing buildings are mostly structurally sound and local demand for new homes is low. This paper examines the viability and benefits of applying the German Passivhaus EnerPHit standard to a suburban dwelling in Hunan, which is in the hot summer/cold winter climate zone of China. The indoor and outdoor hygrothermal data of the dwelling was monitored for 12 months, and the dwelling was then modelled and validated against the measured data. Incremental EnerPHit retrofitting measures were applied to the modelled building, and the thermal performance of the retrofitted building was evaluated using multiple approaches, including a PMV model, the Passivhaus standard and the Chinese passive house standard. The simulation results suggest that the EnerPHit standard is achievable, producing a high energy saving efficiency. Indoor thermal comfort was hugely improved after retrofitting, but two of the multiple comfort evaluation approaches highlighted that overcooling was a bigger problem than overheating for the retrofitted dwelling.

Item Type:	Conference or Workshop Item (Paper)
Status:	Unpublished
Schools:	Architecture
Date of First Compliant Deposit:	14 January 2025
Last Modified:	14 Jan 2025 13:30
URI:	https://orca.cardiff.ac.uk/id/eprint/174422

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