汎用性に配慮したタスク空調システムの設計概要と基本性能の検証

摘要

オフィスビルの空調には、執務環境の快適性向上と地球環境に配慮した省エネルギー推進の両立が求められおり、こうした背景から、最近では、よりパーソナル化を進展させて個人を対象に"快適性"を維持する"タスク空調"と、それ以外のゾーンは"省エネルギー性"を重視する"アンビエント空調"を組み合わせ、より効率化を図ったタスクアンドアンビェント空調(以下TAC)方式への期待が高まっており、様々な方式が考案され、基礎的な研究も進んでいる。%Authors have developed a practical Task and Ambient Air Conditioning system which could respond to layout change of office. The system supplies air from a task unit installed in a partition, using pressure difference between underfloor and office room with a pressurization type under floor air-conditioning system as driving force. Performance experiments of the developed system in an early stage have been conducted using a mock-uq to know a quantity required for air supply of a task unit It was found that 25-35 CMH of supply air volume was obtained as maximum when pressure difference was 10-15 Pa, and it could be reduced to 5-8 CMH as minimum by adjusting the slide shutter for air volume control. In addition to that, by operating guide vanes for airflow direction adjustment, it was possible to control airflow direction from 0 to 45 degrees, and air velocity at a seat position was 0.3-0.4 m/s then. Field performance experiments of the system in a real office was also conducted with a thermal mannequin. It was confirmed that controllability of supply air volume and airflow direction of the system. Equivalent temperature (Teq) of each human body part was almost 28℃ except head part that received direct air flow from task unit It was confirmed that Teq of head part was 25℃. Results of questionnaire surveys against workers using task units in the office showed that almost all of votes were thermally comfort side.