System for draining liquid refrigerant from a subcooler in a vapor compression refrigeration system

摘要

A vapor compression refrigeration system with a tube in shell subcooler for use in low temperature cooling applications such as in a brine chilling application is disclosed. The subcooler has a drain system for draining liquid refrigerant from the shell side of the subcooler at shutdown of the refrigeration system to prevent undesirable amounts of water from freezing in the tubes of the subcooler after shutdown of the refrigeration system.