One contribution to the 1928 fuel debate adds a steam-engine arrangement missing from the original comparison. An exhaust turbine uses steam leaving an ordinary triple-expansion engine. The calculations compare saturated steam at 390 degrees Fahrenheit with superheated steam at 590 degrees Fahrenheit on the same basis as the original table. Mechanical stokers, higher pressures, and faster piston engines are suggested as further improvements. The comparison remains centred on ordinary marine plants whose reliability had already been demonstrated in service.
Notable Point · 1:43:25-1:44:55
Recovering steam-engine exhaust energy with a turbine
An alternative to diesel machinery combines a triple-expansion engine with an exhaust turbine and compares saturated with superheated steam.