Definition: Heating refrigerant vapor above its evaporating temperature while maintaining low pressure. Typically 5-15°C of superheat at evaporator outlet.
Why It Matters:
- Ensures only vapor (no liquid) enters compressor (liquid damages compressor)
- Too little superheat risks compressor flooding
- Too much superheat reduces capacity and efficiency
Measurement: Temperature difference between actual vapor temperature and saturation temperature at measured pressure.
Related Terms: Subcooling, Evaporator, Compressor Protection