Maximum recorded water temperatures?

[O MidKnight]

92C

before the heat dump was fitted to our 1979 circa flat plate system heating a 48 x 18 twin coil cylinder

[Paulh_Boats]

86C a few days ago, at the top of a 117L tank fed by a retrocoil + 30 tubes.

Heat dump is work in progress!

[stephen]

What retro coil do you use. Is it the Navitron one.

Stephen

[Paulh_Boats]

What retro coil do you use. Is it the Navitron one.

Stephen

Stephen,

No its a DIY coil. You can see pictures of it in the Show Us Yours forum:

http://navitron.org.uk/forum/index.php?topic=1426.15

It has an intermittent leak which I have not tracked down yet. I think the 10mm compression joints might leak at high temps/pressures. However it does what it says on the tin!

cheers
Paul

[O MidKnight]

I wonder if bulkhead fittings would be of any use for DIY  retrofit coils? IE 2 x 10mm bulkhead fittings.

46C today  mostly cloudy   a little sun for an hour maybe

[Paulh_Boats]

I wonder if bulkhead fittings would be of any use for DIY  retrofit coils? IE 2 x 10mm bulkhead fittings.

46C today  mostly cloudy   a little sun for an hour maybe

I think they would very useful. I did not know much about them when I built my DIY coil so I epoxied the tubes in place.
Screwfix don't stock them, are they expensive?

-Paul

[wyleu]

125 degrees C. (It's as high as one-wire likes to go...)

But I suspect they have survived more

35 Degrees ( I wish I knew the keyboard grip of death to generate a proper degrees sign  )

at the top of the tank but not an awful lot of it.

[Ivan]

ALT 0156 or ALT 0176 I think. (It doesn't work on a laptop, though)

[stephen]

Thanks Paulh, Sorry I had forgot you made your own.
I am also impressed at the temp gain you are getting.

what length of copper or area are you using and out of interest how did you seal the tube to the flange.

I have got to start my solar project soon, my biomass boiler is providing all the hot water at the moment and its starting to tar up a bit as its throttled back.

Stephen

[Paulh_Boats]

Stephen,

There is about 2m of 10mm pipe coiled at the bottom of my DIY coil. I sealed it with epoxy, but I've since discovered that compression bulkhead joints may be better.

-Paul

[O MidKnight]

wyleu   is that water or heat transfer fluid temperatures?

Paul try BES for nice stainless bulkhead fittings     do brass ones as well  but the stainless ones are great

I have used them on camper water supplies