Founder and CEO, Rajaonarison International

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Design a solar cooker and solar oven that everybody can afford and that can cook faster than current ones.

In order to save the environment and improve health and hygiene especially in developing countries , an affordable source of cooking fuel will be more than necessary.I believe it is possible because most developing nations have enough sunlight to get reliable energy from.

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    Jan 12 2013: Its actually an entirely viable idea. I know this because I have one, sort of.

    I daisy-chained 3 home built solar panels to a car batterty and then used an adaptor to connect to a special no-cooking-oil worktop cooker. No additional modificatons.
    On a good day of light you can save up enough energy to cook a full chicken and the rest of a meal.

    Also worth mentioning that I'm not an engineer and my panels only have 3-4% efficiency
    about 1/3 - 1/5 from the standard modern ones + only 90% of the size and half as many that are typically installed.

    Rather than work on the oven itself (we have the low powered oven technology already, its just not well advertised), we need to focus on the solar panels that power them. Thats where the issue really stands.
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    Jan 13 2013: Good idea. Much has been, and is being, done.
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    Gail .

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    Jan 13 2013: the most efficient way to eat and save energy is to eat vegetarian or eat sushi.

    Meanwhile, if you're a carnivore, set up a solar panel to power the microwave. (Did you know that the first microwave (still in existence) cooks a potato in 5 seconds? A roast in 20?
    • Jan 15 2013: Japan's fishing industry feeds over one (1) billion people.
      Their country is radioactively contaminated.
      Their lakes, streams, rivers, land-locked fish, buildings, and dirt, are highly contaminated.

      The fish they catch in the ocean are radioactive. In fact, fish from that part of the world (some salmon) are being caught off the west coast of America. Strange they are swimming there as it is so far and they don't usually swim that far from their normal habitat.
      Their land-locked salmon is contaminated, as is their trout. Other fish that I read about in the data that has been meticulously and accurately gathered by the Japanese Department of Fisheries, is available but not being published in the media.
      If you eat sushi perhaps it would be wise to ask the restaurant where their fish comes from.
      Their beef and pork is also contaminated.
      Japanese who can, are leaving the country and those who leave and those who remain, if asked, clearly say, "they do not trust their government or Tepco in the least, especially concerning Fukushima.
      They sold over 40,000 pounds of fish to Canada the month following the tsunami. It is a very high risk indeed to eat sushi that might come from Japan.

      Bring a Geiger counter when you do eat out.
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        Gail .

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        Jan 15 2013: Thanks for pointing that out. And important point! I think that I'll check out how expensive geiger counters are. I'm not a sushi eater, but I do include fish oil in my diet.
  • Jan 13 2013: sounds like good ideas to me. Xavier gave me the thought of using some sort of windmill.Of course, trading with the grid offers some advantages over using a batery.
  • Jan 12 2013: To heat 10 liters of 20C water in an environment of 20C using an immersion heater (the most efficient way of heating) to a temperature of 100C in 10 minutes you need around 6000W of power, that's too much power for small local solar energy collection. You can lower the power requirement if you scale up and take more time to heat the water, to for example heat water for an apartment block, but I don't think it's feasible to use solar power for cooking in small villages.
  • Jan 15 2013: Good idea but why not make it free?
    The sun is.
    • Jan 18 2013: Thank you for your input, can you help us make this renewable energy free for everyone?