Experimental Investigation on Thermal Comfort in University Classrooms

摘要

The study investigated the indoor climatic issues in a university classroom. Data were collected in 2 days, at the peak of sunlight exposure, with each sampling lasting 2 hours. To measure microclimatic indexes HD32.3 instrument (Delta OHM) was placed in the barycenter of the enclosed space; the average values of the indoor parameters were monitored every 15 seconds. The maximum values of temperature and humidity were detected using a multi-meter; a tridimensional volume was built and the surface temperature variation analyzed. During the first sampling campaign (empty classroom) high thermal discomfort was estimated. PMV resulted >1.3 and PPD showed values >40%. Also during the second investigation (classroom full) physical variables kept growing despite ventilation/air circulation/air movement. The results show high thermal stress, consequence of a bad built envelope. It is necessary to modify it, considering its key role in reducing the indoor thermal stress and its energy requirements.