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