Re: Secondary independent burner for the superheater?
Posted by:
David K Nergaard (IP Logged)
Date: October 18, 2002 10:43AM
<HTML>As Peter says, separately fired superheaters are seldom used except as a way to fit superheating to existing power plants. Even that is obsolete now, such conversions were mostly done 1890-1920. Most modern power boilers control superheat by having dual furnaces in the boiler, one of which heats the superheater as well as heating the boiler, or altering the location of the flame within a single large furnace. For a plant as small as a car's, I don't think dual firing is practical.
It is probably much easier to design the engine to be tolerant of a range of steam temperatures and design the boiler to provide the desired temperature under average driving conditions. It certainly worked for Serpollet. And, at a much lower temp., it worked for Stanley.</HTML>