Power plants – Motive fluid energized by externally applied heat – Noncommunicating heat transferring motive fluid system
Patent
1996-04-24
1997-02-18
Lazarus, Ira S.
Power plants
Motive fluid energized by externally applied heat
Noncommunicating heat transferring motive fluid system
60651, 60671, 60676, F01K 2310
Patent
active
056032188
ABSTRACT:
Conversion of heat from high-temperature off-gases into useful work is accomplished with a process having first and second stages. The first stage comprises preheating feed water with heat from the off-gases, converting this into steam, passing the steam into a steam expander which drives a first machine, condensing the low pressure exhaust from the expander, and returning the condensate to the preheater to repeat the cycle. The second stage comprises preheating liquid fluorocarbon working fluid, passing the working fluid through a separator and then through the steam condenser, from which a liquid/gas mixture of the working fluid is routed back to the separator, superheating the gaseous working fluid by off-gases, passing the gaseous working fluid into an expander which drives a second machine, condensing the low pressure exhaust from the expander, and returning the liquid fluorocarbon working fluid to the preheater to repeat the cycle. Heat is provided to the process by passing high temperature off-gases, 350 to 1100 degrees Celsius, in sequence through the steam superheater, the water boiler, the fluorocarbon superheater, and the feed water heater.
REFERENCES:
patent: 3945210 (1976-03-01), Chapin
patent: 4116005 (1978-09-01), Willyoung
patent: 4637212 (1987-01-01), Aguet
patent: 5431016 (1995-07-01), Simpkin
Basichas Alfred
Lazarus Ira S.
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