In the washing area of a commercial kitchen, dew condensation often occurs and the resulting thermal environment is not comfortable for workers due to the large amount of heat and moisture generation. In this study, field measurement was conducted to examine the actual thermal condition in the washing area of a commercial kitchen. Then, the temperature and humidity distributions were reproduced by CFD simulation and the relationship between the positions of supply/exhaust openings and thermal environment was studied to improve the environment. The improvement method suggested by the CFD simulation was applied to the real washing area, and the thermal condition was measured to verify the method's effectiveness. The results show that the thermal environment of a washing area can be improved when airflow is appropriately designed and moisture and heat from hot water tanks and washing machines are captured well by the exhaust hoods.

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Since ancient times in Japan, wooden tanks have been used as objects of storage and as barrels for fermentation. From the beginning of the 1900s, chemical industrial use of wooden tanks has increased, and they began to be used as water tanks since the late 1950s. Currently, wooden tanks are used as water tanks with capacities exceeding 200 t in important installations such as public facilities and hospitals. To date, wooden tanks have been designed and manufactured based on experiential knowledge, but there is little experimental knowledge in the event of an earthquake. This study aims to obtain the underlying data regarding the regular distorted state and earthquake resistance of a wooden tank by measuring the distortion of steel materials and wood, which are the main constructional elements of the wooden tank at the time of manufacture and storage of water.

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