Patent ID: 6216462
Filing Date: 2001-04-17
Classification: F02B,F02G,Y02T

Abstract:
An air bottoming power train comprising:a source of combustion exhaust gas;a compressor which receives a gaseous working fluid and compresses it to an elevated pressure;a cooler for cooling said compressor to provide near isothermal compression;an expander having a plurality of cylinders, each cylinder having a piston reciprocally mounted therein and operating in a two stroke cycle including an expansion stroke and an exhaust stroke, said pistons driving an output shaft;a compressed gas line for feeding the compressed gaseous working fluid from the compressor to the expander;expander valve means for successively admitting the compressed gaseous working fluid from said compressed gas line to individual cylinders of said expander in succession and for continuously admitting the compressed gaseous working fluid to an individual cylinder through a first portion of the expansion stroke to is maintain constant pressure;a heat exchanger located in said compressed gas line for indirect heat exchange between the compressed gaseous working fluid and the exhaust gas; andan exhaust gas line for feeding the exhaust gas from the source through said heat exchanger.