A research team led by Professor Rijal Hom Bahadur of the Faculty of Environmental Studies, Tokyo City University has clarified the seasonal comfortable temperature in the office and developed an adaptive model from the relationship between the comfortable temperature and the outside air temperature.
In consideration of energy saving of the building, the Ministry of the Environment recommends setting the heating in winter to 20 ℃ and the cooling in summer to 28 ℃.However, this is not a verification result based on field research targeting offices that actually work.Field research on "comfortable temperature" that feels comfortable is still in the development stage in Japan.
A person can change the indoor comfortable temperature according to the outside air temperature due to the adaptability to the environment.Overseas, adaptive models that take advantage of these adaptability are set based on a large database and are used for architectural design and evaluation.In Japan as well, there was a need for a unique adaptive model that suits the hot and humid climate and lifestyle.
Therefore, the research group conducted actual measurements of the thermal environment and surveys of employee comfort in office buildings in Tokyo and Yokohama.The field research was conducted over a year, targeting 1 office buildings and about 11 people.
As a result, it was found that the average comfortable temperature of the office was 25.0 ° C when the air conditioner was not used, 25.4 ° C when the air conditioner was used, and 24.3 ° C when the air conditioner was used, and there was no big difference throughout the year.Many of the employees were satisfied with the temperature of the office, but even if the comfortable temperature is set according to the outside air temperature, there is a possibility that energy consumption can be reduced by the adaptability of the person.
Based on the data from this field study, an adaptive model that predicts the comfortable temperature in the office room from the outside air temperature was developed for the first time in Japan.The research team says that creating standards based on adaptive models will also help reduce energy consumption and environmental impact.
Paper information:[Building Research & Information] Towards an adaptive model for thermal comfort in Japanese offices