Power plants – Motive fluid energized by externally applied heat – Power system involving change of state
Reexamination Certificate
2006-06-20
2006-06-20
Richter, Sheldon J (Department: 3748)
Power plants
Motive fluid energized by externally applied heat
Power system involving change of state
C060S039511, C060S039530, C060S605100, C060S653000, C060S676000, C060S698000, C060S775000, C123S258000, C123S02500R
Reexamination Certificate
active
07062915
ABSTRACT:
High-efficiency combustion engines, including Otto cycle engines, use a steam-diluted fuel charge at elevated pressure. Air is compressed, and water is evaporated into the compressed air via the partial pressure effect using waste heat from the engine. The resultant pressurized air-steam mixture then burned in the engine with fuel, preferably containing hydrogen to maintain flame front propagation. The high-pressure, steam-laden engine exhaust is used to drive an expander to provide additional mechanical power. The exhaust can also be used to reform fuel to provide hydrogen for the engine combustion. The engine advantageously uses the partial pressure effect to convert low-grade waste heat from engine into useful mechanical power. The engine is capable of high efficiencies (e.g. >50%), with minimal emissions.
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Hamilton Brook Smith & Reynolds P.C.
Richter Sheldon J
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