Examination of thermal comfort in a naturally ventilated hostel using PMV-PPD model and field survey

摘要

The application of Predicted Mean Vote (PMV) and Predicted Percentage Dissatisfied (PPD) indices for thermal comfort quality assessment in naturally ventilated (NV) buildings in warm-humid climate has been observed to lead to overestimation of occupants` comfort and dissatisfaction levels. The thermal comfort quality in a naturally ventilated hostel located in Obafemi Awolowo University, Ile-Ife was determined using PMV and PPD indices. The measured indoor air temperature and relative humidity were 28.1-34 o C and 30.8%-75.5%. The subjective assessments showed that more than 80% of the respondents were comfortable (PD . 20%) while the PPD index predicted tha t 58% of the occupants were not comfortable. The calculated PMV index on the average was +1.63 . There was no correspondence between the thermal conditions predicted by PMV-PPD index and actual comfort vote. Fanger`s PMV-PPD model cannot be used to predict indoor climate in the study area as it overestimated occupants` co mfort and dissatisfaction levels.