Retrofitting Traditional Western Hunan Dwellings with Passive Strategies Based on Indoor Thermal Environment
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AbstractThe unique architectural style of Western Hunan traditional dwellings must be protected, and their poor indoor thermal environment should also be improved. This investigation sought to determine the optimal passive retrofitting methods for such timber-structure dwellings. An analysis of the thermal environment of a typical traditional dwelling in Western Hunan was carried out by field study and indoor thermal evaluation on the typically coldest and hottest days. Based on the test results, this study calculated the predicted mean vote (PMV) linear fit and the acceptable temperature ranges. Then, the optimum thicknesses of the envelope insulation layer and window-to-wall ratio were evaluated by numerical simulation software based on the thermal performance of different strategies. Finally, according to the thermal performance results of the orthogonal experiments and the calculated acceptable temperature, a final comprehensive retrofitting strategy, using ordinary insulating glass units (12-mm hollow layer), a 0.2 window-to-wall ratio improvement, a polyurethane foam insulation layer (10 mm) for the double-fir external wall envelope, and reed foil (80 mm) for the clay insulation layer roof, was optimized for the existing vernacular dwellings in rural areas of Western Hunan, which can decrease the annual load from 188.38 to 65.99 kW·h/m2 and increase the acceptable temperature by 1,159 h over the whole year.
Acceptance Date30/01/2018
All Author(s) ListSheng Liu, Chunhua Huang, Yiming Liu, Jize Shen, Zeng Li
Journal nameJournal of Architectural Engineering
Year2018
Month9
Day1
Volume Number24
Issue Number3
PublisherAmerican Society of Civil Engineers
Article number04018017
ISSN1076-0431
LanguagesEnglish-United States
KeywordsTraditional dwelling, Thermal environment, Passive strategies, Thermal simulation, predicted mean vote (PMV)

Last updated on 2021-17-09 at 23:51