The effect of ambient air condition on heat transfer of hot steel plate cooled by an impinging water jet

It has been observed that the cooling capacity of an impinging water jet is affected by the seasonal conditions in large-scale steel manufacturing. processes. To confirm this phenomenon, cooling experiments utilizing a hot steel plate cooled by a laminar jet were conducted for two initial ambient air temperatures (10degreesC and 40degreesC) in a closed chamber, performing an inverse heat conduction method for quantitative comparison. This study reveals that the cooling capacity at an air temperature of 10degreesC is lower than the heat extracted at 40degreesC. The amount of total extracted heat at 10degreesC is 15% less than at 40degreesC. These results indicate the quantity of water vapor, absorbed until saturation, affects the mechanism of boiling heat transfer.