Refrigeration – Refrigeration producer – Sorbent type
Patent
1992-04-10
1993-06-15
Sollecito, John M.
Refrigeration
Refrigeration producer
Sorbent type
62101, F25B 1500
Patent
active
052188434
ABSTRACT:
An improved regenerative absorption cycle using a super-pressure boiler to achieve a high coefficient of performance (COP). In the basic cycle, an ammonia/water solution is boiled in high-pressure boiling conduit (66). Boiled-off high-pressure ammonia vapor is condensed (96), expanded to low-pressure (99), and boiled in evaporator (101) to extract heat from a refrigerating fluid going to cooling load (104). Low-pressure ammonia vapor from evaporator (101) returns to regenerator (28) and is absorbed back into low-pressure liquid. The low-pressure solution from regenerator (32) is then cooled in absorber (56) to reject heat from the cycle, and is then pumped (58) back to the high-pressure boiling conduit (66). In the present invention, the liquid solution from high-pressure boiling conduit (66) is pumped up to an externally-heated super-pressure boiler (11). Super-pressure ammonia vapor from boiler (11) is absorbed back into super-pressure liquid in absorption super-pressure conduit (26), which functions as an internal heat source to heat the high-pressure boiling super-pressure conduit (66). The super-pressure solution from absorption conduit (26 ) is expanded (36) to high-pressure to boil at high pressure in heat-sink conduit (38) at a low temperature, which conduit (38) functions as an internal heat sink to absorb heat from the low-pressure fluid in regenerator (28).
REFERENCES:
patent: 3742728 (1973-07-01), Mamiya
patent: 4383416 (1983-05-01), Phillips
patent: 4667485 (1987-05-01), Ball
patent: 4732008 (1988-03-01), DeVault
patent: 4827728 (1989-05-01), DeVault et al.
patent: 5016444 (1991-05-01), Erickson
patent: 5097676 (1992-03-01), Erickson
Kalina, "Combined Cycle and Waste Heat Recovery Power Systems Based On A Novel Thermodynamic Energy Cycle Utilizing Low-Temperature Heat for Power Generation," published by the American Society of Mechanical Engineers, 1983.
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