Abstract
This paper reports the results of the measurement of the thermal environments and workers responses which included evaluation of the thermal environments in the "Cool Biz" implemented office. The measurement was conducted an older standard building in the middle of Tokyo in September 2005. Thermal conditions included ambient temperature, relative humidity, air velocity and radiant temperature which were automatically measured every five minutes. As part of the questionnaires, the thermal sensation vote, comfort vote and actual clothing worn were measured. Each worker was also asked regarding their preferences and physical characteristics. The thermal conditions in the office were relatively acceptable range, although ambient temperature was approximately under 28.0°C. However, the workers perceived the thermal conditions differently. The mean of the clo value was 0.53, which showed that the workers wore very light summer clothes. The male subjects did not wear jackets in the office and 12% of them wore put neckties. The mean value of PMV of each worker was 0.50 and PPD was 12.4%. The perception of women was rather neutral, although that of men was diverse. It was considered that this diversity was due to the personal constitution. A proposal was made which indicated the thermal condition of PMV=+0.5 in the room of 28°C was perceived as more comfortable environment.
