Single-sided natural ventilation measurements

Abstract

This paper investigates air movements and temperature distribusions inside an office which is naturally ventilated. An existing environmental chamber with a volume of approximately 45 m3 is used to represent an office. The outside air is supplied into the environmental chamber through three different supply positions on the wall. Measurements of air temperature and velocity are carried out in the environmental chamber at different heights and positions in the chamber. The internal wall surface temperatures and outside air temperature are also monitored. The mean air velocity is measured at the same points as the air temperatures using omnidirectional anemometers. The outputs from the anemometers are fed into a microcomputer; these data are analysed for comfort using the predicted percentage of dissatisfaction (PPD) method of Fanger's thermal comfort criterion.