Serial absorption refrigeration process

Details Serial absorption refrigeration process Serial absorption refrigeration process

1982-06-16

1984-10-09

King, Lloyd L.

Refrigeration

Processes

Evaporation induced by sorption

62112, 62476, F25B 1500

Patent

active

044753535

ABSTRACT:
This invention relates to a highly efficient refrigeration system and process, employing two absorption refrigeration cycles in series operation, the first cycle comprising an ammonia-aqueous ammonia system and the second cycle comprising a novel absorption system and process, driven by low-grade heat and operated at pressures substantially below atmospheric, which provides cooling at temperatures as low as about -12.degree. C. to about +15.degree. C. Solutions of normally liquid, mutually soluble compounds, having substantially different boiling points, are employed as refrigerant and absorbent. Typically, the absorbent comprises a distillation bottoms fraction containing from about 65 to about 95 mole % of the higher-boiling compound and the refrigerant comprises a distillation overhead fraction containing from about 93 to about 99 mol. % of the lower-boiling compound. Heat pumped up in the first ammonia cycle is absorbed in the second cycle by refrigerant at the coolant temperature achieved therein.

REFERENCES:
patent: 3555841 (1971-01-01), Modahl et al.
patent: 3817050 (1974-06-01), Alexander et al.
patent: 4294076 (1981-10-01), Yoshii
patent: 4363219 (1982-12-01), Koseki et al.

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