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| S. Heslop:
Great to see you're back at this! I was just reading the thread about a week ago since I was curious about monotube boilers, and thought you might've given it up. It does seem difficult to find any concrete information on them, or even boilers in general. |
| vtsteam:
Thanks Simon. What I've got is probably too short (about 20 feet) for what I want to power, and the coil size seems big in diameter to me, but we'll pursue what we have here anyway and see where it takes us. I didn't want to risk kinking by winding tighter, though maybe I might have been able to. What I will probably do to compensate is run a cylindrical baffle down the center of the coil to force the combustion products over the coils instead of taking a path of least resistance through the center. I might space the coils out a little farther so I get more penetration between coils instead of the gas just running over them. There is something to be said for irregular coils rather than a nice neat cylinder like it is now, but it can look pretty crude that way. We'll see -- might end up as spaghetti just to find out what happens after testing it "neat" and cylindrical. But it's easier to go in that direction rather than the opposite: start with a rats nest and end with a neat coil. |
| awemawson:
Could you lay it out like they do for ground source heat pumps. Essentially your neat coil pushed over sideways so you have overlapping loops looking like the swirls left by a vertical milling tool. Apparently it maximises the surface contact which is a similar need to your boiler. |
| S. Heslop:
--- Quote from: vtsteam on July 12, 2014, 11:55:28 AM ---Thanks Simon. What I've got is probably too short (about 20 feet) for what I want to power, and the coil size seems big in diameter to me, but we'll pursue what we have here anyway and see where it takes us. I didn't want to risk kinking by winding tighter, though maybe I might have been able to. What I will probably do to compensate is run a cylindrical baffle down the center of the coil to force the combustion products over the coils instead of taking a path of least resistance through the center. I might space the coils out a little farther so I get more penetration between coils instead of the gas just running over them. There is something to be said for irregular coils rather than a nice neat cylinder like it is now, but it can look pretty crude that way. We'll see -- might end up as spaghetti just to find out what happens after testing it "neat" and cylindrical. But it's easier to go in that direction rather than the opposite: start with a rats nest and end with a neat coil. --- End quote --- Could you wind them tighter by packing them with sand and plugging the ends, or maybe even something like a wax you could melt out later? |
| tom osselton:
I remember dad telling us about bending pipe filled with rosin so they would not kink. |
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