Power plants – Motive fluid energized by externally applied heat – Power system involving change of state
Patent
1998-07-14
2000-03-28
Kamen, Noah P.
Power plants
Motive fluid energized by externally applied heat
Power system involving change of state
60657, F01K 2500
Patent
active
060416041
ABSTRACT:
A thermodynamic cycle for converting thermal energy of a working fluid to mechanical energy in a cycle of evaporation, expansion, condensation, and compression, includes methylene chloride as the working fluid. A system for performing the cycle includes a heat recovery boiler; an engine; a condenser; an open deaerating heater to receive condensate from the condenser; a heat exchanger to receive working fluid from the deaerating heater and condensate from the condenser en route to the deaerating heater; a boiler feed pump to receive working fluid from the heat exchanger and return it to the boiler; and a recuperative feed heater between engine and condenser to receive vapor from the engine and working fluid from the boiler feed pump en route to the boiler. The temperature differential between working fluid and heat source is at its minimum where working fluid enters the economizer section of the boiler and the waste heat medium leaves the economizer. The mass flow rate ratio of working fluid to waste heat medium is in the range from 0.5 to >1.
REFERENCES:
patent: 4424677 (1984-01-01), Lukasavage
patent: 4558228 (1985-12-01), Larjola
patent: 4961311 (1990-10-01), Pave et al.
patent: 5490386 (1996-02-01), Keller et al.
Bird Robert J.
Helios Research Corporation
Kamen Noah P.
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