Pelsmakers, S;
Fitton, R;
Biddulph, P;
Swan, W;
Croxford, B;
Stamp, S;
Calboli, FCF;
... Elwell, CA; + view all
(2017)
Heat-flow variability of suspended timber ground floors: Implications for in-situ heat-flux measuring.
Energy and Buildings
, 138
pp. 396-405.
10.1016/j.enbuild.2016.12.051.
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Abstract
Reducing space heating energy demand supports the UK’s legislated carbon emission reduction targets and requires the effective characterisation of the UK’s existing housing stock to facilitate retrofitting decision-making. Approximately 6.6 million UK dwellings pre-date 1919 and are predominantly of suspended timber ground floor construction, the thermal performance of which has not been extensively investigated. This paper examines suspended timber ground floor heat-flow by presenting high resolution in-situ heat-flux measurements undertaken in a case study house at 15 point locations on the floor. The results highlight significant variability in observed heat-flow: point U-values range from 0.56 ± 0.05 to 1.18 ± 0.11 Wm−2 K−1. This highlights that observing only a few measurements is unlikely to be representative of the whole floor heat-flow and the extrapolation from such point values to whole floor U-value estimates could lead to its over- or under- estimation. Floor U-value models appear to underestimate the actual measured floor U-value in this case study. This paper highlights the care with which in-situ heat-flux measuring must be undertaken to enable comparison with models, literature and between studies and the findings support the unique, high-resolution in-situ monitoring methodology used in this study for further research in this area.
Type: | Article |
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Title: | Heat-flow variability of suspended timber ground floors: Implications for in-situ heat-flux measuring |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1016/j.enbuild.2016.12.051 |
Publisher version: | http://doi.org/10.1016/j.enbuild.2016.12.051 |
Language: | English |
Additional information: | Copyright © 2017. This manuscript version is published under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International licence (CC BY-NC-ND 4.0). This licence allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licences are available at http://creativecommons.org/licenses/by/4.0. Access may be initially restricted by the publisher. |
Keywords: | building performance, In-situ U-values, Pre-1919 housing, Retrofit, Suspended timber ground floors, Thermal performance |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources |
URI: | https://discovery.ucl.ac.uk/id/eprint/1537137 |
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