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I will use stainless if I find some going cheap which I can silver solder or give weld. If needs be I will make a copper one for the interim. I am looking at using two displacement lubricators, one per cylinder rather than a mechanical one. If the superheater dries the steam will displacements still work properly. It is the water in wet steam that displaces the steam oil so will they still lubricate enough. My simplex is designed to have a superheater so I will fit one. Julian
Hi Julian, Looks like you have a plan....& a cunning one at that!On the superheated steam front, and at the risk of getting flamed......in our loco's its doubtfull that we actually get any superheat, or if we do very little! Ok the reason.....you can't superheat wet steam.....in industry boiler makers go to great lengths to REMOVE any intrained water as the steam exits the boiler via cyclone separators prior to the steam going to the superheaters. In our size we tend not to have any form of water separator or if there is it's pretty crude. Our superheaters more than likely just tend to dry the steam & in doing so increase the volume available & hence we can run notched up & do get the benefit over non superheated fitted loco's. Now this isn't based on any hard testing but on long discussion over a number of years talking to other loco nuts & working with boilers in the full size petrochemical industryRight dones his helmet & drives under a rock!Cheers Kerrin
I think you may wish to look at some of the research that has been done in the past, particularly by Jim Ewins. Under a sufficient load to get his loco working relatively efficiently, and using firebox radiant superheaters, he measured a steam temperature of 1750F (954C). This is considerably more than is achieved in full size.
Hi Dave, Sure is plenty of space, you'd be most welcome! We are not having the best summer, day temps around 20 C.ChuckKey, You dont by chance have a reference to Jim's article do you? Be interested to have a read, 954C is pretty HOT!.Last place I worked we ran 100 bar steam at 525 C so Like Dave said, you paint wont last long!Just to throw another spanner in the works down this part of the world on this side of the Tasman there is a "debait" on the use of dublex for boilers. Our Aussy cousins are forging ahead & have quite a few under construction & running, this side there is only a couple built, they were used I understand to prove the design code. Anyway one of the boilers was fired as hard as possible, all 3 safety's lifted & the best firebox inner wall temp they could get was approx 280 C, Bet the fire was a LOT hotter!Cheers Kerrin
Yeah gods Dave how do you cope! sounds like you better get Doc at.ound with his snow blower!It's only snowed once here in my memory! Mind you the mountain gets its far share!Cheers Kerrin