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Research on adaptive thermal comfort initiated after h Heat balance model of thermal comfort developed by Fanger (1972) spurred interest in the field. based on laboratory experiments. Adaptive approach relates indoor design temperature to outdoor meteorological or climatological parameters. This chapter assesses the thermal environmental conditions and then quantifies the thermal adaptation in naturally ventilated buildings located in Jaipur city, India, known for of its composite climate, India. The S study also quantifies the acceptable level of different thermal comfort variables and defines d the acceptable comfort bandwidth for the studied group. Adaptive approach is a person?environment approach and helps to evaluate s the acceptable level of comfort conditions considering the effect of thermal adaptation.
4.1 Field study of thermal comfort:-
A F field study of thermal comfort was conducted in 30 thirty naturally ventilated buildings in Jaipur city (26.82 oN, 75.80 oE, and + 390 msl) between started from April 11, 2011 and to May 10, 2013 using a questionnaire as shown in (Appendix-A1). Developed The questionnaire was administered to the subjects to record their comfort sensation and preferences of environment variables. Simultaneously, physical measurements of indoor thermal environment variables were also recorded nearer by to the subjects. Measurements of e nvironment parameters were taken at a height of ~1.1 m height from the floor level considering as per class-II protocol of field measurement.
4.1.1 Sample size:-
The S selection of subjects and quantifiable sample size is an indispensable important parameter in for the field study of thermal comfort. field research. During the study period, a total of 2,859 questionnaire responses were collected between 9:00 a.m. and to 6:00 p.m. local time. Questionnaire collected from the n Naturally ventilated buildings comprised of 63.34 % (N = 1,811) of the responses and the remaining samples relate belong to air -conditioned buildings. and their analysis is carried out in next chapter. Figure 4.1 (a) and (b) depict ed the monthly and seasonal distribution of samples collected in the for present study. field research. The M maximum number of responses (15.6 %) samples were collected during in February month whereas and the minimum questionnaire responses gathered in the December. month. Of the T total responses, 33% % of the samples were collected during form morning sessions (9:00 a.m. to 12:00 p.m.) and whereas 66.7% % (N = 1,227) subject responses accumulated in during the second half, of the study time i.e., 12:010 p.m. to 6:00 p.m.