REFRIGERATION LOAD

The total rate of heat gain of a refrigerated space through all mechanisms is called the refrigeration load, and it consists of

(1) Transmission load, which is heat conducted into the refrigerated space through its walls, floor, and ceiling;

(2) Infiltration load, which is due to surrounding warm air entering the refrigerated space through the cracks and open doors;

(3) Product load, which is the heat removed from the food products as they are cooled to refrigeration temperature;

(4) Internal load which is heat generated by the lights, electric motors, and people in the refrigerated space; and

(5) Refrigeration equipment heat. which is the heat generated by the refrigeration equipment as it performs certain tasks such as reheating and defrosting

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