To obtain the water evaporation rate, the derivative of the fitted
curves was determined (Eq. (2)), which is simply an equation for
the slopes visible in Fig. 2. Initially, there is a rapid increase as
vapour bubbles start to appear at the surface of the fry, increasing
the local turbulence and thus increasing the heat transfer coefficient
. After the maximum evaporation rate has been reached, heat
transfer decreases due to formation of the crust, which has a much
lower conductivity than the frying oi
To obtain the water evaporation rate, the derivative of the fittedcurves was determined (Eq. (2)), which is simply an equation forthe slopes visible in Fig. 2. Initially, there is a rapid increase asvapour bubbles start to appear at the surface of the fry, increasingthe local turbulence and thus increasing the heat transfer coefficient. After the maximum evaporation rate has been reached, heattransfer decreases due to formation of the crust, which has a muchlower conductivity than the frying oi
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