STUDIES FOR A NEW HOT AIR ENGINE

Abstract

This paper deals with the thermodynamic aspects of a new hot air engine cycle which provides for compression of, heat addition to and expansion of, clean air which is used to sustain combustion, with the combustion gases heating externally the compressed air in a heat exchanger.In the first part of this report, the cycle is considered particularly in its simple form without the complications of multistage processes occurring in any of the cylinders. The topics studied include the expansion ratio,cylinder configurations, the concept of necessary and useful expansion,the process of heat addition, and the indices of compression and expansion. The necessary equations are derived and numerical tables are given. In the second part, the effects of introducing multistage units, the air consumption and part-load operation will be examined.