Added: 4 years ago
From: iomoiomo
Views: 105,652
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  • Good music, doesn't really fit the scene though.

  • Why the fuck would you put this music to this kind of video? How stupid do is this person?

  • Instead of a straight line, curve it so it will not need a sun tracker. Not as severe as a horseshoe, but curved more slightly.

    Also, the pipe needs to be much closer to the parabolic trough, I think.

  • wtf...

  • The focal point of the mirror is at approximately 1/4 of the depth of the mirror, also the distance at which the tube should run along.

    This 3D image suggests it is outside the mirror itself.

    The tube can be filled with oil in order to withstand temperatures far above 100 degrees Celcius (212 F) and run it through a heat exchanger

    Regards from Mexico

  • @321ozzy regarding focal point, it depends on the rim angle , it is not always 1/4th of depth (just for information :))

  • Frantic bullshit music. --- Should be thrown off youtube. Total waste of time!!!!!

  • @viking1au franti!,c this songs at like 130-140 bpm, simmer down grandma. WOW never listen to jungle drum and bass you'll shit dust out of your diapers.

  • no no no it's not a parabolic, it's a compound parabola and this design is all wrong, unless you haven't set the heating pipe in the design which it should be put probably about 3-4" off of the center surface, let's get it right please!!!!!!!

  • is not practice,but it works,jaja! ok nice try :)

  • I remember we made these in shop class in highschool. They worked alright, but solar panels worked better because they could heat more water at a time. The showers by the pool were heated this way.

  • Pointing the concentrator directly to the sun adds complication. Is it possible to add secondary mirrors (above and partly around the collecting pipe) that reflects beams a second or third time to the pipe that are of center.

  • This has been solved partially by adding an electric motor that turns the parabola and follows the sun via a photosensor, although that makes it considerably more expensive.

  • It's parabolic; y = x^2 is the general definition of a parabola; if a parabola receives some kind of linear particle coming down perpindicular to the X axis of the parabola, all the particles are redirected by the parabola to its focus. This means it has to be pointed directly at the sun for its light to bounce off its reflective surface to the pipe which runs through the parabola.

  • who the hell thumbs-downed this comment?? its the perfect answer fools!

  • Yeah, I guess maybe I wasn't specific enough? I mean, technically the pipe has to pass through the focus of the parabola, but geez... c'mon people!

  • Yes, with the matter of tracking the sun aside, the water needs to pass through the red pipe in the center, not that box shaped thing on the ground. And one of these concentrators is never enough. An array of them need to be used for efficient water heating. This video is nothing but theory, but this design has been used at least since the 1970s. I think Steve Baer at Zomeworks has used this design.

  • Yeah, I've seen these before. Sun tracking isn't as big of a deal as people might think. There are Do It Yourself kits out there for less than $100 - probably far less than that if you know basic circuitry and have a nearby Radio Shack.

  • The mathematics behind this become a little complex when you start introducing materials, supports, and heating calculations. But if you take the generalized "1,000 watts/square meter" received energy on Earth's surface, cut it to 1/4, and distribute that across an array of them, then you can estimate the output and compare it to the power requirements of a water heater.

    Indeed, there are much better designs out there but this is probably by far the most cost-efficient one I've seen.

  • @tcheightyeight 342 w / m square at  water level.

  • If you're correct, I applaud you and will give you a thumbs up, but after I investigate the matter and find that you're wrong, I'll give you a thumbs down and curse you.

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