In the food preservation, the thermal processing is very usefull due to its easy methodology. In this
case, steam, air or water are used and the convective heat transfer coefficient must be determined.
By this reason, a method to determine the convective heat transfer coefficient was implemented for
thermal process of foods [5].
In an article, the behaviour of heat and mass transfer relation during khoa making was investigated.
Considering a thermal model to estimate the maximum evaporation during heating of milk, indoor
experiments were done. It was observed that with the varying voltage, the convective and
evaporative heat transfer coefficients decrease when the rate of heating is increased.
It was also observed that when the operating temperature is increased, the convective and
evaporative heat transfer coefficients also are increased. The rate of increment of evaporative heat
transfer coefficient was higher than the convective heat transfer coefficient [6].
In this work experimental results for the convection heat transfer coefficient for apple are presented.
Agree to results, the highest value to the convection coefficient is 90 W/m2 °C for a specific solar
radiation of 1150 W/m². The results obtained can be useful in numerical simulation when an
estimation for heat convection coefficient is required