2. 4 kg of whipped egg yolk blocks in 5 cm thick rectangular containers are fed into the continuous system belt freezer at 20C. The air in this freezer circulates at -25 "C. The product leaves the freezer at -10C. The freezing start temperature of the product is -0,5C, the convection heat transfer coefficient is 20 J/s.m."C, Thermal conductivity coefficientI is 2.3 W/m.C, the density of the product is 1014.5 kg/m, product composition: 48.4% water, 16% protein, 34% oil, 0.5% hydrocarbon and 1.1% ash;

a) Calculate the time required for the product to freeze.

b) Calculate the required cooling load for this process.

c) If the product travels 2.5 meters per minute through the freezer, what should be the belt length of the freezer? Calculate.