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Farm Building and Infrastructure
Renewable Energy
Solar thermal - heatbank question
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<blockquote data-quote="Jackson4" data-source="post: 3388888" data-attributes="member: 1180"><p>Thanks Dave interesting stuff, just brushed off my pointing on the chimneys this morning, you think cr*p! scaffold will be round the back monday and so joists/rsj in ceiling will need to be right for store before i can get last 6 foot of skin up and roof on, solar etc... nowt like leaving it to the last minute<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /> </p><p></p><p>My thoughts on this are from the perspective that everything is new so i may as well have a simple solution, having a heat bank would save the cost of putting a water tank in the loft (would have to reinforce ceiling there=cost) so just use mains water pressure and a flat plate heat exchanger. Heat banks are cheapest without a coil in so wondered why you couldnt circulate just the one fluid through the radiaters and solar coil manifold? Is this because of rust or sludge build up in the system? It seems an elegant idea as the will be the most efficient heat transfer as there will be no heat exchanger. If not then a single internal coil for solar is probably what i will do and everything thing else on a sealed primary water system.</p><p></p><p>I'll have a look at the velux kit, its the French gse kit i was looking at and can be found for about £35 a tray so not too expensive (though expensive enough for a bit of recycled plastic)</p><p></p><p>I think you're looking at it the opposite way to me, i meant have primary water in the tank which never goes anywhere but round the system, radiaters, to and from stove boiler, under floor etc this seems to prevent the problems of furring up of coil internal heat exchangers as the primary water will never change and so minerals (in a hard water area here in the pennines) wont furr up the inside of the coils like you'd find in an old cylinder, an external flat plate would be connected with valves either side and could simply be taken off and back flushed with acid (what was it we used for the parlour one? Phosphoric acid) or taken apart every 5 years etc.</p><p></p><p>Not moving tank there is no tank so brand new and room it was in is now knocked down, just trying to find the best place for it and space wise first floor in new extension seems best. </p><p>Thought about the dump for uncontrollable heat source like solar (practically we are not going to pile the fire full of wood an bugger off though i no all situations have to be accounted for) we should be able to just use the radiaters in the heating system as a dump could we? I did have a few thoughts... have a big greenhouse to go in the back garden next to the shed i'm putting solar on and thought maybe heat store under that? Maybe a bit wild thinking<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite18" alt=":LOL:" title="Laugh :LOL:" loading="lazy" data-shortname=":LOL:" /></p><p></p><p>Must go be on till dark with my lambs if i dont get going. I'll have a word later.</p></blockquote><p></p>
[QUOTE="Jackson4, post: 3388888, member: 1180"] Thanks Dave interesting stuff, just brushed off my pointing on the chimneys this morning, you think cr*p! scaffold will be round the back monday and so joists/rsj in ceiling will need to be right for store before i can get last 6 foot of skin up and roof on, solar etc... nowt like leaving it to the last minute:D My thoughts on this are from the perspective that everything is new so i may as well have a simple solution, having a heat bank would save the cost of putting a water tank in the loft (would have to reinforce ceiling there=cost) so just use mains water pressure and a flat plate heat exchanger. Heat banks are cheapest without a coil in so wondered why you couldnt circulate just the one fluid through the radiaters and solar coil manifold? Is this because of rust or sludge build up in the system? It seems an elegant idea as the will be the most efficient heat transfer as there will be no heat exchanger. If not then a single internal coil for solar is probably what i will do and everything thing else on a sealed primary water system. I'll have a look at the velux kit, its the French gse kit i was looking at and can be found for about £35 a tray so not too expensive (though expensive enough for a bit of recycled plastic) I think you're looking at it the opposite way to me, i meant have primary water in the tank which never goes anywhere but round the system, radiaters, to and from stove boiler, under floor etc this seems to prevent the problems of furring up of coil internal heat exchangers as the primary water will never change and so minerals (in a hard water area here in the pennines) wont furr up the inside of the coils like you'd find in an old cylinder, an external flat plate would be connected with valves either side and could simply be taken off and back flushed with acid (what was it we used for the parlour one? Phosphoric acid) or taken apart every 5 years etc. Not moving tank there is no tank so brand new and room it was in is now knocked down, just trying to find the best place for it and space wise first floor in new extension seems best. Thought about the dump for uncontrollable heat source like solar (practically we are not going to pile the fire full of wood an bugger off though i no all situations have to be accounted for) we should be able to just use the radiaters in the heating system as a dump could we? I did have a few thoughts... have a big greenhouse to go in the back garden next to the shed i'm putting solar on and thought maybe heat store under that? Maybe a bit wild thinking:LOL: Must go be on till dark with my lambs if i dont get going. I'll have a word later. [/QUOTE]
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