In WW2 USN ships, what was the weight of a typical boiler?
Upvote:1
Heavy is relative. The temperature and pressure listed would be pretty routine, today pressures ( power) are higher, like 1000 psi. Likely the shell/fire box is less than one inch thick. Most of the weight is in the tubes ; thousands of feet of 2 to 4 inch diameter tubes with wall thickness of roughly 0.3 to 0.4" wall thickness. There would be a mud drum ( same roughly one inch wall ). There will also be a couple other drums like a superheater. So the weight is distributed in several components. There are different designs like "fire wall tubes" (water wall). It seems there must be diagrams of boilers on the net that could be more specific. Every power station and refinery has several boilers , likely similar to marine boilers.
Upvote:2
Found a source on Russian Wikipedia article for the Fletcher Class Destroyers. Using google translate, it says,
The propulsion system repeated the layout of the "Glives" type - it was a high-temperature medium (43 bar [9]) pressure unit , which theoretically provided 20-30% higher efficiency than modern designs of the overwhelming majority of foreign destroyers [10]. The payment for this was the large mass of the power plant, which amounted to 787-822 dl. tons 1... The fuel supply was 491 dl. tons of naval fuel oil and 40 tons of diesel fuel.
"dl. tons" means long ton, which is 1,016.047 kg. The short ton is 907.18474 kg.
So that 1 leads to citation: N. Friedman. U.S. Destroyers. — Annapolis, MD: Naval Institute Press, 2004. — 489 p. — ISBN 978-1-55750-442-5. And it also said it was on page 412.
However, I can't find this book on google books or anywhere else available online, and on stores it is pretty pricey. I suppose I could start hunting in libraries but maybe someone here will have useful comments about it.
Also, note the exact language "the power plant". This would include the boilers and the steam turbines. But probably not the shafts and screws. Anyway, if accurate this means a single boiler and a single steam turbine has a total weight of about 200 long tons (203 metric tons).
Upvote:6
According to a site dedicated to the USS Oklahoma City CL91 (a light cruiser of 11,744 tons), she had four Babc**k and Wilcox Express Type double furnace (M-type) boilers, with the following details
Each boiler weighed 157,850 pounds dry weight. It held 17,810 pounds water, giving a total wet weight of 175,660 pounds. The boilers had 7471 sq. ft. of heat generating surface, in 1820 saturated generating tubes, 224 superheater tubes, 66 water wall tubes, and 62 economizer tubes. Furnace volume was 1158 cu. ft. with 430 sq. ft. of refractory surface (firebrick and diatomaceous earth blocks). The boilers measured 23' 5" wide, 18' 1" high, and 16' 3 5/8" deep.
So dry, the boilers were about 79 (short) tons each.
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