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Title: Advanced regenerative absorption refrigeration cycles

Abstract

Multi-effect regenerative absorption cycles which provide a high coefficient of performance (COP) at relatively high input temperatures. An absorber-coupled double-effect regenerative cycle (ADR cycle) (10) is provided having a single-effect absorption cycle (SEA cycle) (11) as a topping subcycle and a single-effect regenerative absorption cycle (1R cycle) (12) as a bottoming subcycle. The SEA cycle (11) includes a boiler (13), a condenser (21), an expansion device (28), an evaporator (31), and an absorber (40), all operatively connected together. The 1R cycle (12) includes a multistage boiler (48), a multi-stage resorber (51), a multisection regenerator (49) and also uses the condenser (21), expansion device (28) and evaporator (31) of the SEA topping subcycle (11), all operatively connected together. External heat is applied to the SEA boiler (13) for operation up to about 500 degrees F., with most of the high pressure vapor going to the condenser (21) and evaporator (31) being generated by the regenerator (49). The substantially adiabatic and isothermal functioning of the SER subcycle (12) provides a high COP. For higher input temperatures of up to 700 degrees F., another SEA cycle (111) is used as a topping subcycle, with the absorber (140) of the topping subcycle being heatmore » coupled to the boiler (13) of an ADR cycle (10). The 1R cycle (12) itself is an improvement in that all resorber stages (50b-f) have a portion of their output pumped to boiling conduits (71a-f) through the regenerator (49), which conduits are connected to and at the same pressure as the highest pressure stage (48a) of the 1R multistage boiler (48).« less

Inventors:
 [1]
  1. (14 Nace Ave., Piedmont, CA 94611)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
OSTI Identifier:
867358
Patent Number(s):
US 4921515
Assignee:
Dao, Kim (14 Nace Ave., Piedmont, CA 94611) LBNL
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
advanced; regenerative; absorption; refrigeration; cycles; multi-effect; provide; coefficient; performance; cop; relatively; input; temperatures; absorber-coupled; double-effect; cycle; adr; 10; provided; single-effect; 11; topping; subcycle; 1r; 12; bottoming; boiler; 13; condenser; 21; expansion; device; 28; evaporator; 31; absorber; 40; operatively; connected; multistage; 48; multi-stage; resorber; 51; multisection; regenerator; 49; external; heat; applied; operation; 500; degrees; pressure; vapor; generated; substantially; adiabatic; isothermal; functioning; ser; provides; 700; 111; 140; coupled; improvement; stages; 50b-f; portion; output; pumped; boiling; conduits; 71a-f; stage; 48a; refrigeration cycle; external heat; absorption cycle; absorption refrigeration; operatively connected; expansion device; regenerative absorption; effect absorption; /62/

Citation Formats

Dao, Kim. Advanced regenerative absorption refrigeration cycles. United States: N. p., 1990. Web.
Dao, Kim. Advanced regenerative absorption refrigeration cycles. United States.
Dao, Kim. Mon . "Advanced regenerative absorption refrigeration cycles". United States. https://www.osti.gov/servlets/purl/867358.
@article{osti_867358,
title = {Advanced regenerative absorption refrigeration cycles},
author = {Dao, Kim},
abstractNote = {Multi-effect regenerative absorption cycles which provide a high coefficient of performance (COP) at relatively high input temperatures. An absorber-coupled double-effect regenerative cycle (ADR cycle) (10) is provided having a single-effect absorption cycle (SEA cycle) (11) as a topping subcycle and a single-effect regenerative absorption cycle (1R cycle) (12) as a bottoming subcycle. The SEA cycle (11) includes a boiler (13), a condenser (21), an expansion device (28), an evaporator (31), and an absorber (40), all operatively connected together. The 1R cycle (12) includes a multistage boiler (48), a multi-stage resorber (51), a multisection regenerator (49) and also uses the condenser (21), expansion device (28) and evaporator (31) of the SEA topping subcycle (11), all operatively connected together. External heat is applied to the SEA boiler (13) for operation up to about 500 degrees F., with most of the high pressure vapor going to the condenser (21) and evaporator (31) being generated by the regenerator (49). The substantially adiabatic and isothermal functioning of the SER subcycle (12) provides a high COP. For higher input temperatures of up to 700 degrees F., another SEA cycle (111) is used as a topping subcycle, with the absorber (140) of the topping subcycle being heat coupled to the boiler (13) of an ADR cycle (10). The 1R cycle (12) itself is an improvement in that all resorber stages (50b-f) have a portion of their output pumped to boiling conduits (71a-f) through the regenerator (49), which conduits are connected to and at the same pressure as the highest pressure stage (48a) of the 1R multistage boiler (48).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1990},
month = {Mon Jan 01 00:00:00 EST 1990}
}

Patent:

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