ABSTRACT
The field of refrigeration on a large scale was developed in the nineteenth century, and in the mid-nineteenth century, the harvesting, storing, and shipping of natural ice became one of the leading industries of the New England states. The coefficient of performance is a measure of the efficiency of the refrigeration cycle. The wet cycle consists of an expansion of the fluid from the saturation point to the wet region. An ammonia refrigerator plant is to operate between a saturated liquid at 120 psia at the condenser outlet and a saturated vapor at 15 psia at the evaporator outlet. The motor and compressor are usually located in a single housing, with the electrical leads for the motor passing through the housing. The condenser is physically arranged so that room air flows past the condenser by natural convection. The expansion valve is a long capillary tube and the evaporator is shown around the outside of the freezing compartment inside the refrigerator.
