The spray cooling on the fabric was investigated in terms of two main factors such as the latent heat of evaporation of liquid and heat transfer with an impinging jet.
　Two series of aerosol spray samples were prepared by varying ratios of dimethyl ether (DME), water and ethanol to five levels. The amount of mist was controlled by the duration of spray with an identical nozzle.
　The surface temperature and heat flux from the heated fabrics were measured for two minutes to estimate the heat transfer induced by various spray concentration of DME, water and ethanol using infrared thermography and a KES-Thermo-Labo II, respectively.
　Both the maximum heat flux and the lowest surface temperature in the spray area were observed as soon as spray was started. The evaporation of DME occurred much faster than that of ethanol and water so that the lowest temperature was approximately 3 to 8℃ lower in the case of the 50% DME content compared to that without containing DME. The fabric surface temperature subsequently increased after the evaporation of DME and ethanol.
　The evaporation of liquid caused was estimated in the range of 40 to 80 sec after spraying according to the ratio of water and ethanol. Newton's Law of Cooling was applied to these experimental values of heat flux, and evaporation rate (W) was calculated accordingly In the case of cotton knitted sample, the evaporation rate increased with the increase of ethanol content. On the other hand, polyester fabric showed opposite tendency. This difference was related to the amount of remained water in the fabric samples.
　The subjective test showed that people perceived coolness and a sensation of comfort using aerosol spray. The present study demonstrated the possibility of using aerosol spray to control the temperature underneath clothes.

DESCENTE SPORTS SCIENCE Vol.31/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE