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A platform for research: civil engineering, architecture and urbanism
Thermal comfort in office buildings: Findings from a field study in mixed-mode and fully-air conditioning environments under humid subtropical conditions
https://orcid.org/0000-0002-6141-9281
https://orcid.org/0000-0002-3414-290X
https://orcid.org/0000-0001-6801-671X
AbstractThis paper addresses thermal comfort conditions in office buildings with rudimentary mixed-mode environments controlled by occupants compared to fully air-conditioning in a humid subtropical climate in Brazil. Occupants from three office buildings with two different environmental control strategies (two with mixed-mode ventilation and one with permanent air-conditioning) assessed their thermal environment via “right-here-right-now” online questionnaires, while indoor climatic measurements were simultaneously carried out in situ. 2688 questionnaires from 617 occupants were collected. The results indicated that air-conditioning in mixed-mode (MM) buildings controlled by occupants was used permanently throughout the year without any season pattern, being specially connected to the peak outdoor air temperature. In addition, there was a strong tendency toward thermal discomfort due to excessive cold in MM buildings at times when air-conditioning mode was under operation, and hot discomfort during the naturally ventilated mode. When compared to fully-air conditioning buildings, there were similarities in terms of occupant thermal sensation and acceptability levels within the same intervals of Standard Effective Temperature (SET). The results obtained in this study could be useful as a framework for future studies, as well as a baseline for a Brazilian thermal comfort standard.
HighlightsResults from field studies in mixed-mode buildings during different seasons of year in a subtropical humid climate.Results and discussion contemplate observed mixed-mode features and operation modes.A striking feature in mm buildings is the tendency toward a cold discomfort in the AC mode and hot discomfort in the NV mode.Similarities in terms of occupant thermal sensation and acceptability levels were found between MM and FAC buildings.
Thermal comfort in office buildings: Findings from a field study in mixed-mode and fully-air conditioning environments under humid subtropical conditions
https://orcid.org/0000-0002-6141-9281
https://orcid.org/0000-0002-3414-290X
https://orcid.org/0000-0001-6801-671X
AbstractThis paper addresses thermal comfort conditions in office buildings with rudimentary mixed-mode environments controlled by occupants compared to fully air-conditioning in a humid subtropical climate in Brazil. Occupants from three office buildings with two different environmental control strategies (two with mixed-mode ventilation and one with permanent air-conditioning) assessed their thermal environment via “right-here-right-now” online questionnaires, while indoor climatic measurements were simultaneously carried out in situ. 2688 questionnaires from 617 occupants were collected. The results indicated that air-conditioning in mixed-mode (MM) buildings controlled by occupants was used permanently throughout the year without any season pattern, being specially connected to the peak outdoor air temperature. In addition, there was a strong tendency toward thermal discomfort due to excessive cold in MM buildings at times when air-conditioning mode was under operation, and hot discomfort during the naturally ventilated mode. When compared to fully-air conditioning buildings, there were similarities in terms of occupant thermal sensation and acceptability levels within the same intervals of Standard Effective Temperature (SET). The results obtained in this study could be useful as a framework for future studies, as well as a baseline for a Brazilian thermal comfort standard.
HighlightsResults from field studies in mixed-mode buildings during different seasons of year in a subtropical humid climate.Results and discussion contemplate observed mixed-mode features and operation modes.A striking feature in mm buildings is the tendency toward a cold discomfort in the AC mode and hot discomfort in the NV mode.Similarities in terms of occupant thermal sensation and acceptability levels were found between MM and FAC buildings.
Thermal comfort in office buildings: Findings from a field study in mixed-mode and fully-air conditioning environments under humid subtropical conditions
https://orcid.org/0000-0002-6141-9281
https://orcid.org/0000-0002-3414-290X
https://orcid.org/0000-0001-6801-671X
AbstractThis paper addresses thermal comfort conditions in office buildings with rudimentary mixed-mode environments controlled by occupants compared to fully air-conditioning in a humid subtropical climate in Brazil. Occupants from three office buildings with two different environmental control strategies (two with mixed-mode ventilation and one with permanent air-conditioning) assessed their thermal environment via “right-here-right-now” online questionnaires, while indoor climatic measurements were simultaneously carried out in situ. 2688 questionnaires from 617 occupants were collected. The results indicated that air-conditioning in mixed-mode (MM) buildings controlled by occupants was used permanently throughout the year without any season pattern, being specially connected to the peak outdoor air temperature. In addition, there was a strong tendency toward thermal discomfort due to excessive cold in MM buildings at times when air-conditioning mode was under operation, and hot discomfort during the naturally ventilated mode. When compared to fully-air conditioning buildings, there were similarities in terms of occupant thermal sensation and acceptability levels within the same intervals of Standard Effective Temperature (SET). The results obtained in this study could be useful as a framework for future studies, as well as a baseline for a Brazilian thermal comfort standard.
HighlightsResults from field studies in mixed-mode buildings during different seasons of year in a subtropical humid climate.Results and discussion contemplate observed mixed-mode features and operation modes.A striking feature in mm buildings is the tendency toward a cold discomfort in the AC mode and hot discomfort in the NV mode.Similarities in terms of occupant thermal sensation and acceptability levels were found between MM and FAC buildings.
Thermal comfort in office buildings: Findings from a field study in mixed-mode and fully-air conditioning environments under humid subtropical conditions
De Vecchi, R. (author) / Candido, C. (author) / de Dear, R. (author) / Lamberts, R. (author)
Building and Environment ; 123 ; 672-683
2017-07-21
12 pages
Article (Journal)
Electronic Resource
English
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