TWO-PHASE REFRIGERATION SYSTEM

摘要

A heat transfer system includes a first two-phase heat transfer fluid vapor/compression circulation loop including a compressor, a heat exchanger condenser, an expansion device, and a heat absorption side of a heat exchanger evaporator/condenser. A first conduit in a closed fluid circulation loop circulates a first heat transfer fluid therethrough. A second two-phase heat transfer fluid circulation loop transfers heat to the first heat transfer fluid circulation loop through the heat exchanger evaporator/condenser, including a heat rejection side of the heat exchanger evaporator/condenser, a liquid pump, a liquid refrigerant reservoir located upstream of the liquid pump and downstream of the heat exchanger evaporator/condenser, and a heat exchanger evaporator. A second conduit in a closed fluid circulation loop circulates a second heat transfer fluid therethrough having an ASHRAE Class A toxicity and a Class 1 or 2L flammability rating.

主权项

1. A heat transfer system, comprising:
a first heat transfer fluid circulation loop including:
a fluid pumping device;heat exchanger rejecting heat from a first heat transfer fluid flowing therethrough;a flow metering device; anda heat exchanger for absorbing thermal energy into a first heat transfer fluid;wherein a first conduit in a closed fluid circulation loop circulates the first heat transfer fluid therethrough; and a second two-phase heat transfer fluid circulation loop that exchanges heat with the first heat transfer fluid circulation loop through the internal heat exchanger, including:
a heat rejection heat exchanger;a liquid pump; anda heat absorption heat exchanger;wherein a second conduit in a closed fluid circulation loop circulates a second heat transfer fluid therethrough, the second heat transfer fluid having an ASHRAE Class A toxicity rating and an ASHRAE Class 1 or 2L flammability rating or their ISO 817 equivalents, and a liquid pump inlet subcooling is between 0° C. and 10° C.