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Measuring Superheat (F5)
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Measuring Superheat (F5)
This bulletin in the RACHP Engineering Technician Section, Fundamentals series covers superheat.
Superheat is the temperature difference between the actual temperature of a vapour and its saturation temperature (i.e. the temperature at which it can change state). For reliable and efficient refrigeration the correct degree of superheat must be achieved at the evaporator exit. Too much and you will have insufficient capacity, too little and you could carry liquid out of the evaporator into the compressor leading to mechanical failures.
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