Refrigeration – Processes – Compressing – condensing and evaporating
Patent
1977-02-22
1980-06-17
King, Lloyd L.
Refrigeration
Processes
Compressing, condensing and evaporating
F25B 100
Patent
active
042077486
ABSTRACT:
Hot brine supplies the heat for a power cycle which produces the power for a refrigeration cycle in which brine at ambient temperature is cooled to sub-ambient temperature. Both cycles use a heat engine whose compressor and expander employ liquid pistons operating in cylinders which consist of multi-turn helically wound conduits whose cross-sections are varied suitably throughout their length. The liquid pistons are the liquid phase of a two phase working fluid, and the engine operates entirely within the wet region of the working fluid. The hot brine preferably is heated by a source of waste heat. A preferred form of the power cycle consists, in sequence, of a non-adiabatic compression step; an adiabatic compression step; a non-adiabatic expansion step; an adiabatic expansion step; and a condensing step. Simpler versions are possible, but at a sacrifice of flexibility or performance. A preferred form of the refrigeration cycle consists of a thermodynamically reversible, non-adiabatic expansion step, a thermodynamically irreversible insenthalpic expansion step, a thermodynamically reversible non-adiabatic heat absorbing compression step, a thermodynamically irreversible isenthalpic expansion step, and a thermodynamically reversible non-adiabatic heat recycling expansion step. Simpler versions are possible, but at a sacrifice of flexibility or performance.
REFERENCES:
patent: 2278226 (1942-03-01), Taylor
patent: 2813698 (1957-11-01), Lincoln
patent: 2867097 (1959-01-01), Justice
patent: 3332253 (1967-07-01), Alexander
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