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Borgeson, S and Brager, G (2011) Comfort standards and variations in exceedance for mixed-mode buildings. Building Research & Information, 39(02), 33.

  • Type: Journal Article
  • Keywords: adaptive comfort; building standards; comfort models; cooling; mixed-mode; occupants; sensitivity; thermal comfort
  • ISBN/ISSN: 0961-3218
  • URL: https://doi.org/10.1080/09613218.2011.556345
  • Abstract:
    Mixed-mode buildings operate along a spectrum from sealed heating, ventilation and air-conditioning to 100% naturally ventilated, but little is known about their occupants' comfort expectations and experiences. Exceedance metrics, which quantify the percentage of time that a building's environment falls outside an expected thermal comfort zone, can help address the comfort trade-offs in building design and operation. Practitioners were polled on exceedance use in practice and comfort models and exceedance metrics were analysed: several comfort standards using EnergyPlus simulations of a mixed-mode building with radiant cooling in California's 16 climate zones. Results indicate that comfort model choice significantly influences predicted exceedance. Exceedance using PMV-PPD and the adaptive comfort models from ASHRAE Standard 55, EN 15251, and the Dutch NPR-CR 1752 frequently differed by 10 percentage points, often with 2–4 percentage points across the adaptive models. Yet, recommended exceedance limits often fall between 3% and 5% total. Exceedance predictions are also sensitive to uncertainties in predicted neutral comfort temperatures and variations in building envelope performance, solar heat gain, thermal mass, and control precision. Future work is needed to characterize comfort better in support of improved comfort modelling, exceedance targets, building design and building operation, and the development of related codes and standards.

Cândido, C, Lamberts, R, de Dear, R, Bittencourt, L and de Vecchi, R (2011) Towards a Brazilian standard for naturally ventilated buildings: guidelines for thermal and air movement acceptability. Building Research & Information, 39(02), 145–53.

de Dear, R (2011) Revisiting an old hypothesis of human thermal perception: alliesthesia. Building Research & Information, 39(02), 108–17.

Guo, K, Zhang, L and Wang, T (2021) Concession period optimisation in complex projects under uncertainty: a public–private partnership perspective. Construction Management and Economics, 39(02), 156–72.

Le, P L, Jarroudi, I, Dao, T and Chaabane, A (2021) Integrated construction supply chain: an optimal decision-making model with third-party logistics partnership. Construction Management and Economics, 39(02), 133–55.

Moezzi, M and Goins, J (2011) Text mining for occupant perspectives on the physical workplace. Building Research & Information, 39(02), 169–82.

Scharpff, J, Schraven, D, Volker, L, Spaan, M T J and de Weerdt, M M (2021) Can multiple contractors self-regulate their joint service delivery? A serious gaming experiment on road maintenance planning. Construction Management and Economics, 39(02), 99–116.

Strengers, Y and Maller, C (2011) Integrating health, housing and energy policies: social practices of cooling. Building Research & Information, 39(02), 154–68.

Wang, R, Lu, W and Wei, Y (2021) Owners’ use of contract-based power in construction project transactions: restrictions from process specificity and uncertainty. Construction Management and Economics, 39(02), 117–32.

Zhang, H, Arens, E and Pasut, W (2011) Air temperature thresholds for indoor comfort and perceived air quality. Building Research & Information, 39(02), 134–44.

Zhang, J and Yuan, X (2021) Stochastic modelling of maintenance flexibility in Value for Money assessment of PPP road projects. Construction Management and Economics, 39(02), 173–91.