USCG Exam PracticeRefrigeration principles and systems
What is the purpose of the receiver in a marine refrigeration system?
- A. To separate non-condensable gases from the refrigerant vapor before it enters the compressor.
- ✓ To store the liquid refrigerant charge and provide a steady supply of liquid to the metering device.Correct
- C. To remove moisture and particulates from the refrigerant before it reaches the evaporator.
- D. To superheat the refrigerant vapor leaving the evaporator before it reaches the compressor suction.
Why B is correct
The receiver is a storage vessel located downstream of the condenser that holds the liquid charge, buffers load swings, and provides a steady liquid supply to the metering device; it also provides capacity to pump the entire charge down for servicing. Moisture removal is the function of the filter-drier, and non-condensable gas separation is accomplished by purging. (NAVEDTRA 14075 §6-3)
Cited:NAVEDTRA 14075 §6-3