Finned-Tube EvaporatorsA finned-tube evaporator includes rows of tubes passing through sheets of formed fins. Cool, liquid refrigerant flows through the tubes, cooling the tube and fin surfaces. As air passes through the coil and comes into contact with the cold fin surfaces, heat is transferred from the air to the refrigerant. This heat transfer causes the refrigerant to boil and leave the evaporator as vapor.
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