21. The cooling cycle starts with liquid ammonia entering the evaporator at room temperature. 22. The condensed liquid is pumped back to the evaporator to complete the cycle. 23. The principal changes are in the scale and type of compressor and evaporator . 24. Sometimes a gas can be added to the liquid flowing through the evaporator . 25. This is due to the lack of hydrostatic pressure drop in the evaporator . 26. This will lower the load capacity of evaporator and reduce the residence time. 27. :A device for regulating the flow of liquid refrigerant to the evaporator . 28. Often screws hold the evaporator into place from the inside of the refrigerator. 29. Clean the inside evaporator coil once a year. 30. Pasteurized milk is first concentrated in an evaporator to approximately 50 % milk solids.
