,000 kilograms of dressed poultry are blast-frozen on hand trucks each day (24 hrs) in a freezing tunnel. The poultry is to precooled to 7°C before entering the freezer where it is frozen and its temperature is lowered to -20°C for storage. The specific heat of poultry above and below freezing are 3.18 and 1.55 kJ/kg-°C, respectively. The latent heat is 246 kJ/kg and the freezing temperature is -2.75°C. Neglecting the heat load from the hand trucks, determine the amount of heat needed to be removed from the dressed poultry in kW.

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.