The validity and reliability of co-heating tests made on highly insulated dwellings

Alexander, Donald Kneale and Jenkins, Huw Geraint ORCID: https://orcid.org/0000-0002-1900-9449 2015. The validity and reliability of co-heating tests made on highly insulated dwellings. Presented at: 6th International Building Physics Conference, IBPC 2015, Turin, Italy, 14-17 June 2015.

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Abstract

The ability of a co-heating test to accurately identify a dwelling’s envelope heat-loss coefficient has been explored using dynamic thermal simulation techniques, against a number of fabric specifications ranging from 1990 UK regulation levels through to modern Passivhaus requirements. Simple analysis methods can underestimate the heat-loss coefficient, by up to 50% for the highest performance standards considered. Using the best test and analysis methods found the envelope heat loss coefficient could be determined for current stock to better than 10% accuracy in a three week test duration. However that accuracy could not be reliably achieved in a shorter period, nor could it be achieved with a dwelling specification representing emerging standards of insulation, unless longer test periods were used.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Completion
Status:	Unpublished
Schools:	Architecture
Subjects:	N Fine Arts > NA Architecture
Last Modified:	28 Oct 2022 10:27
URI:	https://orca.cardiff.ac.uk/id/eprint/78382

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