Why dont they use alcohol in closed system steam engines? Other than safety?
My point is that alcohol has a lower boiling point that water, (some kinds can boil from the heat of your hand!). SO other than the safety problem of alcohol being flamable, alcohol could operate with a lower heat input than water. With the addition of a cold resivoir, the closed system alcohol steam engine could work right?
Or why not use a refridgerant gas in a closed system steam engine cycle,? >Which would effectively absorb the heat input
addition* I mean for use in any steam engine with a closed loop cycle, like the Rankin cycle http://en.wikipedia.org/wiki/Rankine_cycle