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Talk:Evacuated Tube Indirect Solar Cooker

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OK, it's a mess, but it's a start.

I heard of Grandinetti's design through an science/interest piece on CNN.com. Details were extremely limited. The original broadcast (5 May 2008?) is here: http://www.kitv.com/mostpopular/16160817/detail.html

To DoEdit

  • Link to an article discussing evacuated tube solar collectors
  • Explanation of who John Grandinetti is in the solar/humanitarian aid community?
  • Contact Mr. Grandinetti and see if the design plans can be published on this wiki
  • Summary of specifications (collection area, temperatures, etc)
  • Summary of positive features compared to other designs
    • Stovetop height cooking surface
    • high claimed operating temperature (direct sunlight)
    • high claimed operating temperature (overcast conditions)
    • User is protected from concentrated sunlight
  • summary of drawbacks compared to other designs
    • Expensive primary collection element (at least $21 per tube)
    • Bulky and difficult to move

News Report TranscriptEdit

Posted here as duration of source's hosting is uncertain. The news anchor's introduction and conclusion aren't in this transcript:

[Reporter] Inventor John Grandinetti is cooking lunch for friends out on the lawn in Kahalu’u. This looks more like a children’s slide than an oven, but it will fry foods, bake bread and even boil water. Here’s how it works: There is a long, double-walled vacuum tube filled with vegetable oil. It sits in a reflective compound parabolic curve – that’s a fancy name for a solar funnel that focuses sunlight on the tube. The outside of the tube is cool to the touch, but the inside reaches temperatures as high as 400 degrees, and today John is frying sausage, baking eggplant parmesan and boiling spaghetti noodles.

[John Grandinetti] “I was in Tibet, and I followed three Tibetan girls through the mountains one day – hour and a half out, hour and a half back just to get to the nearest tree area, ‘cause everything else was denuded on the mountain, right. I’ve seen it. I’ve been in these countries, and solar cooking would work to eliminate human misery, and save the forest, and improve the environmental conditions.”

[Reporter] The solar oven will reach temperatures of 300 degrees even on a cloudy day. The solar tube only costs about $21; the frame and insulation are made from inexpensive materials, and it has another use: with clean water becoming a worldwide problem, this will purify drinking water.

[John Grandinetti] “This solar cooker can perform solar pasteurization in a heartbeat, 15 minutes I can pasteurize more than a gallon of water on a sunny day”

[Reporter] John hopes the Chinese will take his design and mass produce cookers that can be used throughout the third world, using a limitless clean renewable energy source for generations to come.

OneEye 22:34, 12 May 2008 (UTC)

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