Solar water heating INEXPENSIVE

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User offline. Last seen 2 weeks 3 days ago. Offline
Joined: 11/26/2008

As my little adobe addition is nearly finished, it's time to think about solar water heating.

I'm still using the 1 gallon water plastic jugs (spray painted black) to mix mud, it's a LOT more pleasant to work with when it's not ice cold.

So anything a step up from the jugs is going to be great and since it needs to be cheap, I was excited by this article in Mother Jones:

Solar on a Shoestring: Mother's Amazing Fin Press

Here's a simple-to-build device that will enable you to construct all the heatcatching fins you'll need for most any homemade solar water heater ... out of free-for-the-gathering tin soda or soup cans! (Actually, even if you decide to make your sheeting out of copper, you'll still want to use our research staff's latest invention— MOTHER's Fin Press —to help you establish the maximum heat-transferring. surface contact between your water pipes and your collector's fins.)



I tried getting a larger picture, but I think this is it.

I'm seriously missing the BIG picture.

And I hope messing with cans and soldering won't be as bloody and painful as working with sheet metal on the roof.

User offline. Last seen 2 weeks 3 days ago. Offline
Joined: 11/26/2008
Here's a $4,000 water

Here's a $4,000 water heater:



SKU: 10.18

10 year manufactures warrenty. A Thermosiphon unit is a completely passive design that relies on buoyancy effects to circulate fluid through the collectors as opposed to the pumps and controllers found in active systems. When sunlight strikes the collectors in the SunSiphon system it heats the food-grade antifreeze within them, which then rises due to buoyancy into the jacket-style heat exchanger on the bottom of the storage tank. Here the antifreeze transfers heat into the tank, becomes cooler, and sinks to the bottom of the collectors to repeat the process. During periods of no sun, the cool fluid in the base of the collectors is not heated, does not rise, and thereby stops circulation of the antifreeze. In this manner, thermosiphon units achieve the operational characteristics of active systems but without the pumps and controls. See for more spec. info.


And here are some GREAT dyi projects:

Very cool!  It is so nice to see people make the effort to put so much info on a site.