床吹出空調と天井吹出空調システムを用いたオフィスの室内環境比較実測

概要

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Thermal environments, indoor air quality, and ventilation effectiveness were measured and evaluated in an office installed both with floor-based and ceiling based systems. Two systems were compared. Major findings are as follows : 1. The horizontal air temperature gradients were within acceptable range and almost same for both systems. 2. The LPPDs were found less than 6% except 6.25% for ceiling-based system in summer. 3. Air temperatures and Δ EHTs at lower level with floor-based system tended to be cooler than those for the ceiling-based system. However the differences were not significant. 4. Subjective acceptability for indoor air quality was no difference between two systems. However lower figures were observed for floor-based airconditioning system in terms of the concentration or the number of air-born particles. 5. Ventilation performance index was greater for the floor-based system than the ceiling-based system. This field study quantitatively makes it clear that floor-based system can provide comparable thermal environment and better air quality in comparison with the ceiling-based system.
社団法人日本建築学会の論文
1999-05-30