Chapter 10- PROPULSION BOILERS 



In design details and in general configura- 

 tion, the newer single-furnace boilers vary 

 somewhat among themselves. Figure 10-22 

 shows a 1200-psi boiler of the type installed on 

 some post World War II destroyers. Except for 

 the additional water-cooled surfaces, this boiler 

 is very much like the older single-furnace 

 boilers. In contrast, figure 10-23 shows a type 

 of single-furnace boiler that has been installed 

 on some recent ships. The superheater tubes 

 are installed vertically, rather than horizontally, 

 between generating tubes and water screen tubes. 

 Note, also, that there is a separate water screen 



header for the water screen tubes; this feature 

 is quite unusual in single-furnace boilers, though 

 standard for double-furnace boilers. 



New Types of Propulsion Boilers 



The field of boiler design is by no means 

 static. Although one trend predominates— that of 

 using higher pressures and temperatures— there 

 are almost innumerable ways in which the higher 

 pressures and temperatures can be achieved. 

 New types of boilers are constantly being devel- 

 oped and tp=^ed, and existing boiler designs are 



PERTINENT DATA 



OPERATING PRESSURE 1200 PJIC 



STEAM TEMPERATURE 950° P 



RATED STEAM OUTPUT 133,000 LBS/HR 



TOTAL HEATING SURFACE 7590 SO PT 



FURNACE VOLUME 420 CU FT 



38.41 



Figure 10-22.— Newer 1200-psi single-furnace boiler for post World War II destroyer. 



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