I used a system like that. When out of sap or shutting down, you must substitute water for sap and divert the water outside of the pan. Water is just used to cool the tube.....
Printable View
I used a system like that. When out of sap or shutting down, you must substitute water for sap and divert the water outside of the pan. Water is just used to cool the tube.....
Which way do you run the sap through the preheater? In the bottom of the coil and out the top or in the top and out the bottom?
I went from the feed tank into the bottom of the coil and out the top and into the pan. When I substituted water, I slipped a length of hose over the copper tube and directed it over the side and into a pail. As the feed tank got low on water, I dumped the pail back in and used the water again. Just need enough flow to keep the coil cool.
Is that the flow of sap with a preheat in a manifold/hood setup, from bottom to top? I'm guessing you get more heat transfer with pushing it up. However I would be more concerned with it air locking. Is the advantage in feeding the bottom or the top first?. I think safe money is on (top to bottom) for gravity flow, however it may get better effect in (bottom to top).
I had a new idea about the preheat that will solve my cooling of the pipe problem. I am going to bend the pipe into a kids straw shape with several bends and press it against the back of my stack holding it tight with SS wire. Then when I am out of sap for the evening I can undo the SS wire and remove pipe away from stack. Water isn't always certain at my sugar house. Pipes freezing etc. and getting it into my tank is even more of a problem. So being able to undo it each boil will be handy.
I feed it from the top.
I think that is the way I am going to go to be safe.
325abn....
Is that just a sheet of tin you wrapped around your copper coil, or is it stainless - or some other material? Also, how did you join the seams?
no sap flow means too much thinking of the next project.
thx.
Its just a piece of 8" gal duct work. I pulled it tight around my coils and used sheet metal screws to hold it in place. I also put a piece of insulation both at the top and the bottom.
OK thx.
Have you had a chance to run your coil yet? If so, anything you would tweak?
That is pretty much the same thing I did and I found it works very well. The sap come out at 115Quote:
Originally Posted by 325abn