Power plants – Fluid within expansible chamber heated or cooled
Patent
1997-10-20
1999-04-20
Kamen, Noah P.
Power plants
Fluid within expansible chamber heated or cooled
60646, 60560, F01B 3102
Patent
active
058947299
ABSTRACT:
This invention is a heat engine operating on the afterburning Ericsson cycle whose principle is heat addition to the cycle by an afterburner in which fuel is burned with the low-pressure air working fluid exhausted by the expander. The resulting combustion gases are used in a countercurrent heat exchanger continually heating (1) the air expanding in the expander and (2) further upstream the high-pressure air (compressed by the compressor) in the regenerator. The ideal efficiency of this cycle is the Carnot cycle efficiency between the same top and bottom temperatures. Practical engines are more efficient than those in which heat addition takes place upstream of the expander. All moving parts are only exposed to clean air, and expander valves can be operated at temperatures comparable to current internal combustion engines. Liquid or gaseous fuels can be used and control of speed and power is simple, based on keeping engine temperatures constant. With the low-pressure continuous combustion, pumping and sealing problems are easily solved, engine noise level is low, and air-polluting emissions are minimal. Dual-cylinder engines with synchronized alternating pistons give rise to completely constant afterburner conditions which avoid thermal transients and facilitate engine operation. The performance of afterburning Ericsson cycle engines exceeds that of current internal combustion engines, in terms of thermal efficiency and specific fuel consumption.
REFERENCES:
patent: 673462 (1901-05-01), Thorton et al.
Kamen Noah P.
Unterberg Walter
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