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A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE

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Laurentic:
The way that reads, the superheater took nearly 60 degC out of the steam - not sure its supposed to work like that!!  It never used to!!

Chris

simplyloco:

--- Quote from: Laurentic on March 08, 2024, 03:50:05 PM ---The way that reads, the superheater took nearly 60 degC out of the steam - not sure its supposed to work like that!!  It never used to!!

Chris

--- End quote ---

Let me explain. When I first opened the steam valve the initial rush of steam was at 274C. Not surprising given the temp in the end space and no movement of steam. Then the constant stream was at the lower temperature, which was to be expected. Still 60 degrees above the wet steam temp so I read that as OK. Or am I being a numpty...? :old:

MJM460:
Hi John,
you are correct about the reason for the temperature dropping when the steam flow starts.

Of course, it is worth thinking about how to set a tiny flow to warm things up as the boiler heats, at the same time ensuring there is a small flow through the superheater to avoid that temperature extreme.  You don’t want to melt anything during warmup.

The scotch boiler looks great.

MJM460

Laurentic:
Are, so, now I understand what you were saying!!!!

Chris

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