Air-conditioning systems

This study conducted investigations aimed at clarifying the differences in environmental control behaviour, thermal/air environments and pupils' thermal sensations before and after installation of cooling systems. It also developed guidelines for operating the equipment. Measurements of temperatures and CO2 concentration, visual inspection of environmental control behaviour and questionnaires about thermal sensation were performed in classrooms of one elementary school in Tokyo.

The purpose of this study was to clarify differences between evaluations of thermal environment undercross ventilation and airflows from air-conditioning systems and electric fans. Nine subjects evaluatedthermal sensation, thermal comfort sensation, airflow sensation and humidity sensation in anexperimental room in the summer of 2006. The surrounding ambient temperatures, relative humidity,and air velocity were measured simultaneously.