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To assess occupant thermal comfort, field studies were carried out in naturally ventilated (NV) classrooms of Indian Institute of Technology Kharagpur. The location has a hot–humid climate. Surveys were taken during both semesters over the academic year 2013–14. Results of the surveys gave a regression neutral temperature near 29 °C while preferred temperature was found to be 26.8 °C. Using student responses to thermal acceptability question, 80% occupant satisfaction was found between 22.1...
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Adaptive comfort standards have been gaining wider acceptance and are now considered an integral part of main stream comfort research. Several adaptive comfort equations have been developed, some as part of international comfort standards and some for specific climatic regions. In the current work, an attempt was made to find a best fit among available comfort equations for predicting occupant comfort in the tropical climatic regions of India. Comfort temperatures found in surveys done...
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This study presents a comparison of classroom learning performance between courses taught in naturally ventilated (NV) rooms and air-conditioned (AC) rooms. This is done to examine effect of thermal comfort standard followed — PMV based or adaptive thermal comfort — on learning. The same group of students, attending different courses in the two classroom types over two years, was chosen to avoid inter-student difference of aptitude and ability. Performance was measured on basis of final...
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A thermal comfort field study was conducted in an undergraduate laboratory classroom involving 121 subjects giving 338 responses. The building is located in a tropical climatic region of India. In addition to objective measurements of indoor climate, subjective responses on perceptions regarding thermal sensation, thermal preference, air velocity, and humidity were also collected. We present here an analysis of the subjective preferences and disposition of the occupants. While acceptability...
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A thermal comfort field survey is carried out inside a naturally ventilated laboratory in the tropical climatic region of India. The building chosen is used for courses in an undergraduate engineering curriculum. We aimed at assessing how the occupants perceive their thermal environment in a free running building while carrying out their normally scheduled tasks. A total of 121 acclimatized subjects were interviewed and 338 responses were collected during the months of spring semester....
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To gain a better perspective of occupant preference in naturally conditioned classrooms, a comfort survey was conducted in undergraduate classes during one month each in fall and spring semesters. The studies were conducted in Indian Institute of Technology Kharagpur. All students participating in the survey were acclimatized to the local weather. Surveys were taken during November 2012 and March 2013. Survey results showed a remarkable level of adaptation among the occupants to the local...
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Adaptive comfort standards (ACS) have been gaining acceptance worldwide including in international comfort standards. The current work does not try to provide further evidence that ACS works but instead tries to put forth the most suitable ACS for the tropical climatic regions of India. We compare the comfort temperatures predicted by some standard ACS with the comfort temperatures found from field studies done in tropical climatic regions of India. We find that an ACS developed for the hot...