Talk:Water-tube boiler

Marine boilers

Marine boilers, what few remain, are largely if not solely limited to D-type boilers. -- 64.154.26.251 23:51, 6 June 2005

CAN ANYBODY EXPLAIN THE THREE ELEMENT CONTROL IN WATER TUBE BOILERS IN DETAIL ...OR SEND ME THE LINK — Preceding unsigned comment added by 116.203.160.197 (talk) 19:40, 25 July 2011 (UTC)[reply]

Needed improvement

I have removed some text in the article. It needs work before it can go back in.

The electrical panels and Chimney parts etc. were supplied separately.

This doesn't make sense

After the War over some unused transportable sets, as reparation units, were given given to some Indian States for augmenting their Power generating capacities.

This needs a source and cleaning up. Come to think of it, the whole article needs sources. --Adamrush 07:10, 16 January 2006 (UTC)[reply]

Efficiency

The article is not clear. According to the picture, the hot gas, produced by burning, first is used to boil the water, and only then - to superheat the steam. This does not seem to provide the best efficiency, because the temperature of exhaust gasses cannot be below the temperature of superhot steam. The efficient scheme should imply that the gas first is used to overheat the steam, and only then, to boil, and, perhaps, to warm the water. In such a way, the temperature of the exhaust gas could be lower (say, 400 kelvin instead of 600 kelvin), with corresponding increase of the efficiency. Could anybody upload the scheme of the efficient boiler? Can anybody explain, why the non-efficient boilers are preferred (if it is really so)? dima (talk) 04:56, 26 September 2008 (UTC)[reply]

The article is perfectly clear as a general introduction to water-tube boilers. The diagram is correct for small boilers. The refinements used on large utility boilers (with thermal loads of 1 GW and up) are an article in themselves. (Economisers and air preheaters would certainly be needed to bring the exhaust gas temperature down to 400K). 86.176.115.95 (talk) 23:12, 5 May 2010 (UTC)[reply]

Railway locomotives

Needs some addition here, rare though they were.

Was there anything similar in the USA? Andy Dingley (talk) 12:10, 10 October 2008 (UTC)[reply]

Yes, there were. The two main groups that I know of were the high pressure designs on the D&H, and the more conventional designs on the B&O.

The general claims here are a bit wobbly. Unless there were a lot of continental watertube engines, the statements about compounding and high pressure are somewhat dubious. The B&O std. pressure/simple engines were more numerous than the D&H high-pressure/compound cases. I've corrected the claim about steam turbine usage, as you can see. Mangoe (talk) 03:38, 29 October 2008 (UTC)[reply]

Missing section: "Principle of operation"

I think the current lede goes into too much functional detail for an introductory paragraph. It seems to me that a new 'first section' is required, named "Principle of operation" (for example) taking the bulk of the operational detail from the lede. This would allow the lede to better summarise the whole article.

The "Principle of operation" section could then stand being expanded.

EdJogg (talk) 18:21, 20 October 2009 (UTC)[reply]

Removed 'duplicate' text

The "Babock & Wilcox" section had the following added recently:

WORKING- The drum is filled with water through the economiser with the help of a non-return feed check valve about half of its capacity leaving the rest of it for steam space.the coal is charged onto the great and burnt.The hot gases move up and down between the baffles in a beneficial path .They transfer heat to the water in tubes and the steam in the super-heater in zones(1),(2)and(3) finally the hot gases exit through the chimney.The draught is regulated by a damper.The portion of water tubes nearer to the furnace are heated to a higher temperature and therefore the dencity of water decreases and rises into the uptake header and the short tubes along with wet steam.They enter into the steel drum where the steam separates from the water and collects in steam space.At the same time water at the back and which is at lesser temperature enters into water tubes through the long tube and the downtake header.Hence natural circulation of water (convective current) is istablished.The stem collected in the steam space is led to the superheater,through the steam pipe. The superheated steam is tapped through the steam stop valve.

This substantially repeats the text found in the lede. There are a few differences, which could be incorporated in "Principle of operation" (see section above) but for now I thought the safest and fairest course of action was to copy the text here.

As far as I can make out, it is not a copyvio of a website (despite the inclusion of "zones(1), (2) and (3)" -- I haven't modified any spelling).

EdJogg (talk) 18:21, 20 October 2009 (UTC)[reply]