Solar water heating, DIY style.

[Riejufixing]

Has anyone tried this? I am thinking of having a go.

For a bit of fun, I have been experimenting. I dangled a loop of garden hose, full of water siphon-style, out of the window, with both open ends submerged in a bath half-full of water. The intake water is at 23 1/2°C, the outlet temperature 33 1/2°C, not much of a difference but the ends of the hose are noticably different in temperature, and I would not expect a lot from this setup.

Pics are the ends of hosepipe crossing as they come in through the window, and warmer water welling up from the warm end into the cool water. Brighter colours are warmer.

[goto10]

Get/make yourself a glass-fronted wooden box, big coil of black hose inside (with as much surface area exposed to the glass front as possible) - little pump, then feed that closed loop through a coil of hose in a water cylinder (or bath - although won't be as effective without insulation keeping the heat in)
It's basically what they do in hot countries, you'll always see such a contraption on the roof.
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'12 NC700S & '12 CB600F Hornet [Stolen by some dickless twat] Suzuki GT500 shed

[Riejufixing]

[goto10]

[BTTD]

There are some interesting blogs out there where people have built their own. Top tip I recall was to build several smaller units that link together as they're much easier to get up onto the roof.

[panrider_uk]

I was watching youtube videos the other night with peeps using them to help heat hot tubs by pumping the water from the hot tub through the coiled hose and back into the tub.
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Current bike: Honda ST1100

[Suntan Sid]

[Hong Kong Phooey]

All you need is glass, and whatever they make steering wheels out of.
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'81 CG125, '97 FZS600 : '99 CBR600F4, '09 KTM RC8

[ThunderGuts]

I would suggest the best stuff would be 8mm microbore copper pipe, arranged in a spiral (to maximise surface area but without any sharp bends that'll hurt easy pumping, plus make it easier to form by hand), clamp onto a sheet of plywood and spray paint the whole lot matt black (as thin a spray covering as possible). Then glass front it to insulate from the cooling effect of the wind. You could feed from the mains and use mains pressure to drive it depending on where it is and the water pressure, then use the warm water coming out the outlet.

On the vague topic, why doesn't someone invent an insulated bath? The Mrs is forever "topping up" with hot water because she complains it gets cold too quickly. Yes, some will be lost to the surface-air, but some losses could be reduced by insulating the bath itself and given most baths are enclosed behind a screen, the extra bulk of 15-20mm of insulation aren't going to be noticed.
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TG.

[goto10]

[MCN]

[Freddyfruitba...]

[hellkat]

*wanders in, doesn't have a FUCKING CLUE what they are talking about, but is dead impressed, blokes doing blokey chat, and fucks off again, pleased to have such awesome chums*

#lalaland ... its good here.

https://thumbs.gfycat.com/ShimmeringIllegalHammerheadshark-mobile.mp4
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Not nearly as interesting in real life.

[Riejufixing]

[hellkat]

Damn.
I only put it in there to annoy you, and now you've worked out how to view them

Don't worry about the meaning, its all in my ditzy little head anyway
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Not nearly as interesting in real life.

[Riejufixing]