Engineering · Refrigeration — Expansion Valve
A thermostatic expansion valve (TXV) controls refrigerant flow into the evaporator to maintain a constant:
- ASuperheat at the evaporator outlet✓ Correct
- BCondenser pressure
- CCompressor oil level
- DSeawater temperature
Explanation
The TXV meters liquid into the evaporator to hold a set superheat at the outlet, ensuring the evaporator is fully used while preventing liquid refrigerant from returning to and slugging the compressor.
Authority: Modern Marine Engineer's Manual; refrigeration controls
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