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Toymaker
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    • Toymaker
      Toymaker replied to the thread New Member.....
      Welcome to being an active member Dusty1. Hope to see many more posts from you. Since you're into steam traction engines and...
    • Toymaker
      Toymaker reacted to Dusty1's post in the thread New Member.... with Like Like.
      I've an inactive member for some years. Just changed my name to Dusty1 after two beloved dogs. I'm into traction engines and locomotives...
    • Toymaker
      Have you considered wrapping a single coil of tubing around the 3.5" pipe, then cover the coil and pipe with a sheet of thin steel...
    • Toymaker
      Toymaker replied to the thread Monotube Flash Boiler Design.
      Yes Yes. Since I don't want to exceed 200C by too much, I will keep the steam temp at around 232C (450F) which should give me close to...
    • Toymaker
      Toymaker replied to the thread Monotube Flash Boiler Design.
      Yep, chemical decomposition of R123 begins at 250C, which is why I've set a max operating temperature of 184C, which is also the...
    • Toymaker
      Toymaker reacted to JLaning427's post in the thread Monotube Flash Boiler Design with Like Like.
      Out of curiosity, I went and looked at the SDS for R123. One I found was from Chemours. R123 is usually non-flammable, but it appeared...
    • Toymaker
      Toymaker replied to the thread Monotube Flash Boiler Design.
      I still recall watching a safety video in boot camp demonstrating the proper way to find steam leaks in overhead pipes; sweep the pipe...
    • Toymaker
      Toymaker replied to the thread Monotube Flash Boiler Design.
      K2, Haven't we already beat this topic to death? A word search of this thread for "Barlow's formula" found 17 posts; "Tensile" shows...
    • Toymaker
      Toymaker replied to the thread Monotube Flash Boiler Design.
      You're partially right. The working fluid, water or R123, is a liquid everywhere to the left of the saturation line. Everywhere inside...
    • Toymaker
      Toymaker replied to the thread Monotube Flash Boiler Design.
      It appears you have a type-o as you've labeled both values as Critical Temperature. So, to clarify, for R123: Critical Pressure is 532...
    • Toymaker
      Toymaker replied to the thread Monotube Flash Boiler Design.
      As long as the feed pump keeps pressure inside the boiler tube at, or above, 500 psi (3.5 megapascal), the R123 cannot flash into a...
    • Toymaker
      Toymaker replied to the thread Monotube Flash Boiler Design.
      NO!!! Go back to the first post in this thread and study the P-h diagram for R123. Due to the 500 psi pressure supplied by the feed...
    • Toymaker
      Toymaker replied to the thread Monotube Flash Boiler Design.
      I THINK, K2's use of the term "6 Bar" is simply a label used by plumbing suppliers in the UK, and actually refers to the max pressure...
    • Toymaker
      Toymaker replied to the thread Monotube Flash Boiler Design.
      Higher fluid flow velocity does mean lower contact time, but that condition does not produce hotter internal wall temperatures, in fact...
    • Toymaker
      Toymaker replied to the thread Monotube Flash Boiler Design.
      I posted these two photos back in post #27, showing two different monotube boilers, both using copper tubes and both operating at around...
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