Power plants – Motive fluid energized by externally applied heat – Power system involving change of state
Patent
1988-05-27
1989-04-11
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Power system involving change of state
60649, F01K 2506
Patent
active
048194379
ABSTRACT:
A method is provided for converting sensible heat energy of a heating fluid supplied by a high-temperature heat source to work, by means of a thermodynamic cycle employing a multi-component working fluid, wherein a "rich solution" having a higher concentration of lower boiling component, or components, is heated in a vapor generator in counter-current heat exchange with the heating fluid to produce a vapor-liquid mixture which is introduced into a lower zone of a rectifier and separated therein into a "lean solution" having a higher concentration of said lower boiling component, or components, and a vapor mixture; the enthalpy of the vapor mixture is increased by passing it through a superheater in counter-current heat exchange with said heating fluid at its highest temperature; the vapor mixture is then expanded in a first turbine to an intermediate pressure level thereby to generate work and subsequently in a second turbine to a low pressure level to generate additional work; the spent vapor mixture is then recycled to an absorber wherein it is dissolved in said lean solution so as to regenerate said rich solution. The cycle is characterized mainly in that a portion of said lean solution emerging from the rectifier, is decompressed, by means of an expansion device, into a so-called flash drum wherein the lean solution separates into a yet leaner solution and a vapor mixture which is expanded in a turbine to produce additional work.
REFERENCES:
patent: 4756162 (1988-07-01), Dayan
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