Warren cycle engine

Abstract

This is the mechanization of an external combustion hot air engine cycle known as the “Warren Cycle”. The “Warren Cycle” has four parts. They are: 1. cooled compression; 2. stored heat released from a regenerator and heat added to the working fluid at constant volume; 3. heated expansion; and 4. heat stored in a regenerator and heat removed from the working fluid at constant volume. The resulting engine is a thermally regenerated, reciprocating, two stroke external combustion engine that stores the spent heat in regenerator 10 and returns it to the engine cycle to do work. Each unit of the engine has cylinder 12 that is closed at one end by cylinder head 4 and contains working fluid, regenerator 10, heater 14, cooler 24, and power piston 18 that is connected to power output shaft 22. Cooler 24 is moved through the working fluid as it is being compressed, cooling the working fluid. Regenerator 10 and heater 14 are moved through the working fluid, heating the working fluid, while its volume is kept constant. Heater 14 is moved through the working fluid while it is expanding, heating the working fluid. Regenerator 10 and cooler 24 are moved through the working fluid, cooling the working fluid, while the volume of the working fluid is kept constant.

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