diy solar water heaters -Solar Hot Water Heater Thermosiphon DIY

January 5, 2013 – 12:21 am

** Solar hot water heater demonstration unit. DIY and save compared to a complete domestic solar water heater. Video Rating: 4 / 5

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  1. 24 Responses to “diy solar water heaters -Solar Hot Water Heater Thermosiphon DIY”

  2. I deal with this type of pre heat solar water heater in Spain, they work great and provide over 300 days of free hot water here.

    I do use 2 units on my house just for under floor heating in the day then switch over to wood burner with boiler for night.

    By cssolar1 on Jan 5, 2013

  3. Hey Charlie, I bought this exact system from him. I tried doing a similar thing you were looking to do. I wanted to utilize my existing water heater and have the solar system heat the water in the existing water via a circulator. Even in the Summer, it didn’t have the “power” to heat above 130 degrees. But, as soon as I flipped a few valves to make it run like it was originally designed for, I got 180 degree water coming out of my faucets! I used it the whole Summer, never ran out of hot water!

    By dbgunguy on Jan 5, 2013

  4. Greece make them for over half a century, we have refined the tech, actually we never -ever- use electric power to heat our boilers.
    But we build them with glass on top to shield it from external heat resonance, plus we can use glass made like a lens.
    We also use closed system which circulates antifreeze liquid and then it passive heats the boiler (this is good for resisting in ice breaking and freezing)

    By Kitrinomavro on Jan 5, 2013

  5. it would only help you a little, not that much, it is designed for hot water not heat. You need a solar heating system that we would need to design.

    By VillageGoneGreen on Jan 5, 2013

  6. hi, if the water was circulating in a closed system how long would it take to cool down over night? Have you done this kind of study or do you have any stats on that. What i am aiming for is to have this unit hooked up to a heat exchanger in my house and circulate water through it to make heat in the house
     any info about this would be appeciated

    By Charles Kelly on Jan 5, 2013

  7. Look for the “SOLAR DEATH RAY WATER aqua lens with 1/3 Kilowatt Heat Energy” video from GREENPOWERSCIENCE
    “This is another solar water lens that is almost 30 inches in diameter and can burn through wood quickly.,,, This lens concentrates about 500 watts of solar heat energy to a focal point of 1 inch optimal with a 3-6 inch scatter.”

    Granted that is output at high noon, but whats another mirror or small collector array to redirect the Sun at it going to set you back?

    By Gui falkerz on Jan 5, 2013

  8. Just a recirculatory system cooled like our cars are now, taking advantage of solar heat derived as I suggested and powering an electric motor with electricity from Peltier Banks fed by heatpipe arrays.
    Not enough heat for you? Add some Methane fueled Bunsen burners and put your seatbelt on.

    And of course we have plenty of lighter materials to work with,,, just look at the potential of Spray on truck bed liner to make paneling. :D

    Carbon composite framing and hemp-based fiberglass bodies,

    By Gui falkerz on Jan 5, 2013

  9. I hate when I forget my Kid’s logged in here. lol

    By Gui falkerz on Jan 5, 2013

  10. Your wattage derived depends much on the system you use to derive it my friend.

    Jamming the BTU’s from this collector panel into a 40 gallon solar hot water heater, you derive the equivalent as you describe, but if you use this energy to heat a closed loop system of a smaller quantity, like a 5 gallon system, your BTU’s build up rather quickly.

    Snake Oil is Awesome Medicine if you catch the right Snake. ;)

    By Michael Bruno on Jan 5, 2013

  11. Antifreeze is a major ingredient in ice cream. Is it could to bathe in ice cream? Yes it is. Yes it is.

    By MrJivePirate on Jan 5, 2013

  12. Solar hot water can be done that way.

    By MrJivePirate on Jan 5, 2013

  13. The average solar flux is 164 watts per square meter and a car has about 1 square meter of area on the top. So an idealized solar hot water car could supply 164 watts of thrust. A 1 horsepower engine supplies about 745 watts. So to supply the typical 120 horsepower you’d need about 545 square meters of collection.

    By MrJivePirate on Jan 5, 2013

  14. If there were mirrors on the side of the road which autocratically tracked solar heat collectors on passing vehicles it may be possible to drive a solar-thermal hot water car. Much like the old ideas for nuclear powered cars, this is fraught with obvious problems.

    By MrJivePirate on Jan 5, 2013

  15. Storing BTUs in a pressure vessel “battery” could work ok, although the range would be limited by the vessel’s pressure rating and therefore almost certainly quite short. Improved pressure vessel technology could make such a vehicle more viable. Heat collection on the vehicle is very unlikely to pay for its own weight. Dramatically lighter materials could improve that situation.

    By MrJivePirate on Jan 5, 2013

  16. Glycol anti freeze is added to the water in cold climates. Glycol is a major ingredient in ice cream.

    By MrJivePirate on Jan 5, 2013

  17. So put it on your roof.

    By Gui falkerz on Jan 5, 2013

  18. You could simply use a solar powered pump to keep the hot water constantly recirculating in it’s own loop, like when you leave the water on just a bit for the really cold nights.

    By Gui falkerz on Jan 5, 2013

  19. All you are doing is converting the total BTU’s deliverd by the sun to an 8′x10′ area which is equivalent to about the same as 3 microwave ovens. Focus that thermal energy to a 3″ point of contact and you will see some stuff move.
    Set 2 of these panels in a V on a trailer bed with a good prismatic solar collector,,, or line a 53′ tractor trailer with them like that,,, :D

    By Gui falkerz on Jan 5, 2013

  20. Not to mention help out “Clean coal” plants run their scrubbers, washers and steamers for catching the fly ash.

    “Ziggy Popacapolis” on Facebook. (I hate chatting through Youtube. :D )

    By Gui falkerz on Jan 5, 2013

  21. I bet this wouldn’t make enough energy to run a car BUT I am willing to be proven wrong.

    By MrJivePirate on Jan 5, 2013

  22. Speaking of cheap gas, I bet this could be used to provide heat for petrochemical refinement (200-300 C), especially with supercritical carbon dioxide instead of water, that would knock off a significant fraction of the CO2 footprint of the existing vehicle fleet.

    By MrJivePirate on Jan 5, 2013

  23. “We’re” too busy watching TV and worrying about cheap Gas for our Cars.

    P.S. Run this on a trailer and use it to power a Stirling engine or peltiers to run an electric motor and see how fast you can go. :D

    By Gui falkerz on Jan 5, 2013

  24. Good, send me a check and I’ll build you one, or something similar. :D

    By Gui falkerz on Jan 5, 2013

  25. P.S. AWESOME design, I really like it.

    Have you had the time to look into Methane digesters or Producer gas / BioChar systems?

    The waste of 1 is Compost, the waste of the other is charcoal like they use for water filters, mix them and you make Terra Preta. Both make power and give you FERTILE TOPSOIL as a payback for your efforts to make energy you can run your lights on or your car.

    By Gui falkerz on Jan 5, 2013

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