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Title: Liquid over-feeding refrigeration system and method with integrated accumulator-expander-heat exchanger

A refrigeration system having a vapor compression cycle utilizing a liquid over-feeding operation with an integrated accumulator-expander-heat exchanger. Hot, high-pressure liquid refrigerant from the condenser passes through one or more lengths of capillary tubing substantially immersed in a pool liquid refrigerant in the accumulator-expander-heat exchanger for simultaneously sub-cooling and expanding the liquid refrigerant while vaporizing liquid refrigerant from the pool for the return thereof to the compressor as saturated vapor. The sub-cooling of the expanded liquid provides for the flow of liquid refrigerant into the evaporator for liquid over-feeding the evaporator and thereby increasing the efficiency of the evaporation cycle.
Inventors:
 [1];  [2]
  1. (Oak Ridge, TN)
  2. (Knoxville, TN)
Issue Date:
OSTI Identifier:
870906
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5622055
Contract Number:
AC05-84OR21400
Research Org:
LOCKHEED MARTIN ENRGY SYST INC
Country of Publication:
United States
Language:
English
Subject:
liquid; over-feeding; refrigeration; method; integrated; accumulator-expander-heat; exchanger; vapor; compression; cycle; utilizing; operation; hot; high-pressure; refrigerant; condenser; passes; lengths; capillary; tubing; substantially; immersed; pool; simultaneously; sub-cooling; expanding; vaporizing; return; compressor; saturated; expanded; provides; flow; evaporator; increasing; efficiency; evaporation; liquid over-feeding; heat exchange; heat exchanger; liquid refrigerant; pressure liquid; saturated vapor; accumulator-expander-heat exchanger; over-feeding operation; compression cycle; vapor compression; vaporizing liquid; integrated accumulator-expander-heat; /62/

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