Showing papers on "Thermal comfort published in 1990"
TL;DR: In this paper, the authors present a review of thermal comfort in buildings and examine what variations in indoor temperatures may be acceptable in the presence of man's thermoregulatory system and some experimental findings on periodic and on ramp (or drift) variation in room temperature.
146 citations
Journal Article•
TL;DR: In this article, the authors describe the instrumentation and measurement protocol used in ASHRAE research project RP-462, field study of environmental conditions and occupant comfort in 10 office buildings located in the San Francisco Bay region.
Abstract: This paper describes the instrumentation and measurement protocol used in ASHRAE research project RP-462, field study of environmental conditions and occupant comfort in 10 office buildings located in the San Francisco Bay region. During this study, we made a total of 2342 visits to 304 participants during two seasons collecting a full set of physical measurements and subjective responses at each visit. In this paper we describe the design of equipment and techniques for gathering physical measurements with the detail and accuracy required by both ASHRAE Standard 55-81 (ASHRAE 1981) and ISO Standard 7726 (ISO 1985). In a addition, the project developed a laptop microcomputer-based thermal assessment survey that collected a substantial subjective data set in machine-readable form. These components performed reliably during nine months of field use, providing a detailed description of the monitored workstation environments with a concurrent portrait of subjective occupant response. The system is recommended for further use.
54 citations
TL;DR: In this article, the authors investigated the thermal comfort of college-age Chinese subjects and obtained the optimum thermal conditions for buildings by using the probit technique for analysing subjective responses of thermal sensation and found that the neutral zone was between 22.2 and 25.2°C.
37 citations
TL;DR: In this paper, a new methodology has been introduced for an overall and quantitative evaluation of comfort and energy consumption of an office room with a ceiling radiant heating system, radiator heating system or a warm air heating system.
35 citations
TL;DR: In this article, a computer-based model for the automatic optimization of the passive thermal performance of buildings has been described, where two optimization methods, the simplex method and the non-random complex method, have been combined and coupled to a thermal prediction program.
34 citations
TL;DR: In this paper, the authors investigated the discrepancy between temperate climate comfort theory and actual human response in the tropics, and the implications for energy conservation in tropical cities are also discussed.
32 citations
TL;DR: In this article, a transient simulation is performed for a building with four different rooms in a typical city close to the central desert of Iran with passive cooling by night ventilation in a residential building in the hot arid regions of Iran.
23 citations
TL;DR: In this paper, a review is made of two thermal comfort models suited to outdoor applications, one based on the WBGT index developed by Yaglou & Minard (1957) for which direct reading instruments are available and the other based on readily available National Weather Service Data suggested by Macfarlane (1958).
10 citations
7 citations
TL;DR: In countries with hot climates, thermal comfort always depends on the acquired tolerance of people to the prevailing conditions, and from this stems their perceived comfort level indoors as mentioned in this paper, and therefore, comfort evaluation must allow for acclimatisation if economic environmental control systems are to be specified.
Abstract: In countries with hot climates, thermal comfort always depends on the acquired tolerance of people to the prevailing conditions, and from this stems their perceived comfort level indoors. Comfort evaluation must allow for acclimatisation if economic environmental control systems are to be specified. Previous comfort studies are critically evaluated for application to the Bangladesh climate. The most appropriate findings are summarised and considered in the context of local vernacular design and social requirements.
6 citations
01 Oct 1990
TL;DR: In this article, the reactions of 6 facilities managers and 151 office workers to under-floor task ventilation were measured, and a majority of office workers said that task ventilation improves thermal comfort, perceived air quality, and provides good temperature and ventilation conditions to support productive working and to help maintain alertness at work.
Abstract: Questionnaire surveys measured the reactions of 6 facilities managers and 151 office workers to under-floor task ventilation. Facilities managers received fewer complaints about thermal discomfort and ventilation problems than in their previous buildings, and were very satisfied with task ventilation. A majority of office workers said that task ventilation improves thermal comfort, perceived air quality, and provides good temperature and ventilation conditions to support productive working and to help maintain alertness at work. Age and sex interactions were found for several environmental conditions, and women generally reported more frequent problems with thermal discomfort and ventilation.
Dissertation•
01 Jan 1990
23 May 1990
TL;DR: A new approach to thermal comfort control is presented in this paper, where it is shown that there is a distict difference in the environmental preference from one person to another based on votes of thermal sensation provided by human subjects.
Abstract: A new approach to thermal comfort control is presented Thermal comfort control systems are complex systems in which the control objectives are vaguely defined by human preference It is shown that there is a distict difference in the environmental preference from one person to another based on votes of thermal sensation provided by human subjects A recursive algorithm for learning the individual preference is proposed The algorithm changes a prediction of the thermal sensation by locally changing a stored representation of the system
TL;DR: In this article, the authors draw attention to the need for three separate measures of radiant temperature in a room: the local value Trp (potentially observable), its space-averaged value (Trv), and the radiant star temperature Trs.
Abstract: The term 'mean radiant temperature' is used in Section A1 of the CIBSE Guide in connection with thermal comfort, and in Section A5 in connection with the thermal response of an enclosure. With one amendment, the argument of Section A1 is correct but those of Section A5 are flawed and incomplete. This Note draws attention to the need for three separate measures of radiant temperature in a room: the local value Trp (potentially observable), its space-averaged value (Trv), and the radiant star temperature Trs. ('Mean radiant temperature' might refer to any of these.) A study of room radiant exchange requires explicit consideration of the role of surface emissivity, and of the effect of long-wave energy flow from an internal heat source. It is pointed out that the conductances associated with this exchange (and also the convective exchange) are 'large', while the radiant and convective conductances associated with comfort temperature are 'small'.
01 Jan 1990