|
The New Jersey fired all of it's boilers, not half, they all worked. In 1983 the New Jersey left the coast of South America and steamed to the coast of Lebanon, it did it on all 8 boilers for the entire trip. I have that in a letter written by Commander Jones, the Chief Engineer while stationed off the coast of Lebanon. The only reason why large ships don't usually steam all of their boilers is because it's a drain on manpower.
On a 600lb steam system, the saturated steam comes out of the top of the steam drum at approximately 490 degrees and goes into the superheater where it comes out as main steam and 840-850 degrees. A line off the main steam line goes back into the boiler's desuperheater and comes out as auxilliary steam which is 490 degrees. Depending on the pump or turbine, it is either powered by main or auxilliary steam. A boiler is just a large firebox and it really doesn't wear out. The header tubes are routinely tested and sometimes replaced during yard periods and the boiler floors are rebricked.
|