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

A refrigeration system is described 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. 4 figs.
Inventors:
;
Issue Date:
OSTI Identifier:
504945
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States) PTO; SCA: 320106; 320303; PA: EDB-97:097271; SN: 97001815620
Patent Number(s):
US 5,622,055/A/
Application Number:
PAN: 8-408,248
Contract Number:
AC05-84OR21400
Resource Relation:
Other Information: PBD: 22 Apr 1997
Research Org:
Lockheed Martin Energy Syst Inc
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; REFRIGERATING MACHINERY; AIR CONDITIONERS; VAPOR COMPRESSION REFRIGERATION CYCLE; REFRIGERANTS; TANKS; HEAT EXCHANGERS; OPERATION; DESIGN; SUBCOOLING; ENERGY EFFICIENCY