천장 카세트형 냉ㆍ난방기에 의해 형성되는 학교 교실의 실내 열환경 및 공기환경의 개선에 대한 연구

Ceiling cassette type air conditioner has been a main stream as a heating/cooling system recently in school, Korea. In this study, indoor thermal environments made by ceiling cassette type air conditioner were investigated by CFD simulation. Concentrations of CO₂ were investigated by a field measurement. Indoor thermal environment with the velocity inlet angle of 45°from the ceiling in heating season was very ununiform so that thermal area was divided into two parts those the one is window side which is cold, and the other is corridor side which is hot. In cooling season under the same condition, there are areas too hot or too cold. If the velocity inlet angle is setin 30° from the ceiling, indoor thermal environments was improved greatly in cooling season and heating season, too. Also, from the field measurement of CO₂ concentrations, it was suggested to install ventilators with proper air volume considered the number of class students.