I've heard this bandied about before, Is this really a practical idea? Has anyone actually build something like this? I haven't run any numbers but I find it hard to believe that the output would be worth the extra weight and complexity. Or if it is even a thermodynamically possible process.
BMW has (I can‘t remember which) either a concept car or a model exclusive to Europe that uses a high and low temp steam system to help turn the crank shaft. I read about it in Popular Science a year or so ago.
2001 Ford F-250 Superduty, 6 speed manual, twin-turbocharged 7.3L Powerstroke diesel dynoed at 627 hp and 923 lb/ft. If you want to know more, PM me.