EFFECTS OF AIR MOVEMENT ON PERSPIRATION AND THERMAL COMFORT IN SUMMER IN A CLIMATE CHAMBER

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In a climate chamber controlled at 30℃ and 60%, an electoric fan attached 1.5m above the floor and 2.0m forward the sitting subject was run and stopped for 30 minutes each in the daytime in summer. The responses of local sweat rates and thermal comfort votes to the change of air movement were analysed. The results were, (1) Mean air velocity and turbulent intensity 30 cm forward the face was 0.71m/s and 37.1% respectively for the running and 0.043m/s and 46.5% respectively for the stopping, (2) For both conditions, thermal sensation votes were at the warmer side than neutral and sensation votes of perspiration were at the side of not-sweating than neutral, (3) The air movement were evaluated 'too little' significantly for the stopping and evaluated 'cool', 'refreshing', 'making cool', and 'making comfortable' for the running, (4) The sensation except for 'sweltering' were improved after the running but 'sweltering' got the worst for the second stopping, (5) The local sweat rates were between 0.00 and 0.20(mg/cm2/min.) for the all experiments but fluctuated differently among the experiments, (6) The cumulative sweat rates for the running and the stopping in the same experiment were correlated each other with coefficients of 0.71-0.96, (7) The sensation of perspiration did not always reflect the sweat rate when voted, (8) In some eases for the larger sweat rate, the larger the sweat rate was, the hotter the thermal sensation was, (9) In some cases for the running, the larger the sweat rate was, the more comfortable the thermal comfort sensation was, (10) In some cases for the stopping, the larger the sweat rate was, the less comfortable the thermal comfort sensation was, (11) The survey on the literatures on evaluation of thermal environment shows that the subjective sensation of perspiration was regarded as important at the beginning of the field.