Cylinder sizing table

[Julian]

http://www.biopowered.co.uk/wiki/Hot_water_cylinders


Very useful chart, Tony, Where did you find that?

My Mark I heated filter is nearing completion, Mark II is already on the cranial drawing board.  Mark I is made primarily from brass and copper.  I was concerned by a recent thread on the VOD showing green Bio, so I think I'll try some simple tests with bits of copper in Bio and various ingredients to see which, if any, produces the colouring.

Photos of the tests might sit well on a page with your table, showing exactly what produces the colouring ... I assume it's Copper Oxide.  I've got my suspicions that excluding air will prevent it from occurring.

[K.H]

I know that me and Chug have kept bio samples and i think Nige has some at the moment and yes it is contact with air that causes the green,if the samples are submerged is wont occur

[Julian]

You spoil all my fun you do!

[K.H]

Its what we at Tosser Towers like to do 

[Tony]

The table is an accumilation from a couple of sites

What it really needs is diagrams of direct, indirect and primatic cylinders.  I've found a couple of direct/indirect ones from a DIY site but my GIMP skills are pretty poor with the new version so I've not yet managed to craft a primatic cylinder diagram.

The intention on that page was also to advise on checking immersion heater length as well.

[Keef]

my GIMP skills are pretty poor

Well, it made me laugh anyway.

[Julian]

So ... you want a graphic of a cylinder?

[Tony]

How much trouble would it be Julian?

The ones I was looking at for direct and indirect are here:

http://wiki.diyfaq.org.uk/index.php?title=Domestic_Hot_Water_Systems#Direct_and_Indirect_systems
However these is nothing for primatic - the best I've found is here:

http://www.salamander-engineering.co.uk/technicalcentre/faq/faq.htm#primatic

What I'd like to do is write a paragraph on identifying primatic vs coiled cylinders (essentially if you look through the side port of a primatic - you see the curved wall of the primatic parts rather than the tube bending away as with coiled indirect).

[Julian]

Yes, it would be an immense amount of trouble, but hey, anything for a good wiki ... (I recon we can do a little better than the diagrams you referenced though).

We could show one inverted, noting the connections in respect of a processor (if you wish).

I'd never heard of a Primatic cylinder until you mentioned them, don't think they can be very common.  I think I can see how they work, but what's the periscope type thing sticking up into the tank, any ideas?

[Tony]

That would be fab Julian.

With the inverted one we can show the dangers of a long element (fancy drawing an explosion?)

Primatic is what my cylinder was - much to my annoyance.  I had to cut the base off, extract the innards, then soft solder some shaped copper back over the gaping 'ole.

I should've kept the primatic bit, there was a periscope type tube, but whether that was to create a pressurised air section to allow some water into the upper dish or not I couldn't say.  Complicated things they are, never fully understood how they worked.

[Julian]

Ok, I'll see what I can do over the next few days.  I'll try asking a plumber mate how common primatic cylinders are.

Very good idea about the immersion length, will do.  Let me know any other ideas you have.

Somewhere I have some photos of soldering additional connections to a copper cylinder ... are those any use for the page?

[Tony]

Yes definitely - the more information the merrier really!

[Julian]

Ok, I put some diagrams together.  I'm not too sure about the shading inside the cylinder, I think it might confuse things, so I'd be happy to hear other peoples comments.

Tony, it's quite easy to move connections, heaters etc, so let me know what permutations and arrangements you want for the page.  We can use or loose the ticks and crosses as you see fit.  Do you want all the designs on one graphic or individually?  Would it be an idea to name the various connections as in a heating sytem?

I could show foam insulation, along with additional insulation on the bottom of the tank when up-turned, if you want to include that in the text too.

I haven't had a chance to ask my mate how common primatic cylinders are.


Efforts to date (just a scratch file ) are  ... 



I've also up loaded photos of soldering new connections to a cylinder here ...

[Julian]

Just spoken to my tame plumber ... he installs one or two boilers a week and comes across pirmatic cylinders three or four times a year.  So it looks like they are not very common.

[Tony]

I must have been really unluckly then.

All those picture are AWESOME.  I mean, really, really good!  Can we use all of them please?  I like the shading - in fact, I wasn't expecting so much - bloody brilliant Julian!