Thanks to our very first supporters, sponsors and partners of the #FreeTheSun campaign during Summer 2015, early DIY builders and enthusiastic partners and sponsors, we have reached our first milestones.
We have been able to release for free the construction guide of the Sol1 model (1m² of mirrors) and publish the Sol4 guide. Both are now accessible to Members. Get involved now!
With our Textbook campaign we want to spread the know-how of solar entrepreneurship globally.
Become a GoSol.org member and build yourself. Get access to construction plans, how-to’s tutorials and more directly from the expoerts.
Check also our Technology section for more.
A 4sqM GoSol.org solar concentrator boils 8L of water in 30 minutes. Effectively as powerful as a 2000W electric stovetop burner on red-hot. That said, solar energy depends on where in the world you are, the ambient temperature, how much reflective surface area you’re using and how clear the atmosphere is. Most solar power calculations are based on INcoming SOLar radiATION (insolation) of 1000W/m2. Boiling 8L of water in 30 minutes is a real world example, at 31degN latitude in February with 900W/m2 of isolation.
There are a few differences worth noting: they are built from off the shelf components available in every country on earth, no parabolic bending or computations are needed, they are large & powerful designs, but still human scale flexible. Additionally, they are more scalable since once the core technique is mastered, it is easy to modify designs to suit regional needs.
Simple answer: anything that requires heat, from cooking an egg to drying apples to smelting metals. (Note: Our current models are not designed to melt metal).
Long answer: You can cook (bake, boil, fry, steam, sear, grill, sauté, roast, stew, deep-fry, etc), you can preserve foods (by making jams, jellies, chutneys, by canning food, by dehydrating and drying produce, by pasteurizing) and you can roast (most commonly nuts and beans like coffee, cocoa and peanuts) and create solar thermal steam pressure which can drive mechanical systems (pumps, factory equipment, ventilation, refrigeration and generators).
We’re already done roasting, water purification, baking, fruit drying, frying and steam production. Some of these applications will be included in the construction guides.
Hold your hand in the sunlight, can you see a sharp shadow? If yes, your solar concentrator will work. If no, then I’m afraid you won’t be using clean, renewable solar thermal energy for the moment! These solar concentrators require clear, direct sunlight to function. It’s not a problem in much of our target market where the sun shines clearly for 300+ days out of the year.
Used correctly, solar concentrators are harmless. The same can be said of gas stoves, open fires and biomass boilers, so what happens when things go wrong and what are the chances? When our solar concentrators are in the ‘off’ position, the mirrors are angled at the ground and so cannot burn anything. When properly aligned and in the ‘on’ position the dangers from the focal point are arguably less than an open gas burner. Depending on the application our designs come with a protective shade that makes sure even accidental focal drifts don’t bother the operator. Further, when using glass mirrors, adhesive backing can be applied so that if a mirror gets broken it doesn’t fall to pieces on the ground.
You need to be able to cut to length, drill holes, be systematic, apply adhesives and paint. GoSol.org’s solar concentrators are normally built using steel (though with some adaptation can be built out of wood and/or bamboo), so welding is a very useful skill to have, though it isn’t strictly necessary. All the components can be assembled using nuts and bolts, but it’s lot of drilling and bolt flanges, so welding is recommended.
4-5 days if you have all the materials on hand and access to tools. This varies based on the tools available and your level of experience.
The smaller the scale of a solar thermal system, the harder it is to store energy. There are, however, a number of methods to store heat, from creating quicklime to using molten salt heat storage. A simple and well established low tech solution known as “heat retention cooking” involves putting hot food in a well insulated container which can keep it very hot for 6hrs+.
Because they are so much more than just solar cookers. GoSol.org tech can also power processing heat for a number of productive industries. Solar cooking is an important function, but GoSol.org solar thermal technology bridges the gap between conventional solar cookers and industrial scale solar thermal.
It needs a circle about 5 meters (15 feet) in diameter, though it doesn’t occupy all that space at once, that’s over the course of a full day’s rotation to follow the sun.
The guides will be free. Depending on where you are in the world and what kind of access you have to materials, it will cost between $450 and $750 dollars if you build with metal. With wood and bamboo much cheaper.
No, not at the scale of solar concentrators that we are promoting. It’s like passing your finger through a candle. If you leave your finger there, you’ll get hurt. However, the focal point for large solar concentrating tower type projects is many meters wide and thus can kill birds when they fly through it. Large CSP plants like Ivanpah have this problem. Our focal point is much smaller and under the cook-top where we’ve never seen a bird rest.
Question unanswered? Contact us!
Check also our Impact section for more.
Energy poverty means not being able to afford to keep the lights on (or the candles burning, or the kerosene lamps lit). It means dousing your fire (you cook on an open fire) with water once your food is cooked, and then drying out the charcoal and embers to use later. It means not being able to boil potentially contaminated water. Energy poverty means women and children, instead of working or going to school, spend huge amounts of time scavenging for sticks, twigs, agricultural residue, dung, anything that will burn. Living in energy poverty is a terrible burden, a daily grind that as time passes, becomes harder and harder to escape.
We’re faced with several feedback loops that could cause total disaster if left unchecked, a feedback loop of local solar development and innovation has the potential to scale faster than the problems we face and faster than any industrial solution. Though industrial renewable projects, when actually renewable, are good too, they are too capital intensive to scale globally in a short period of time.
One billion 2kW solar concentrators would displace an amount of energy equivalent to all biomass burning today, radically reducing deforestation and pollution. One billion multiplied by 2kW is 2,000 gigawatts which is roughly 4 times as much as all the nuclear energy being produced today.
Our 4m^2 model can replace as much as 9000kg of wood per year when used 6 hours per day, 300 days per year. In many areas, this can make the difference between the regeneration of the ecosphere or continued deforestation and eventual desertification.
In many towns, around many cities in the developing world, there is an expanding ring of tree-lessness. Each day people have to venture further to collect their fuel. Meanwhile, black carbon emissions fill the sky and darken the arctic snow.
Key facts (via World Health Organization)
-Around 3 billion people cook and heat their homes using open fires and simple stoves burning biomass (wood, animal dung and crop waste) and coal.
-Over 4 million people die prematurely from illness attributable to the household air pollution from cooking with solid fuels.
-More than 50% of premature deaths among children under 5 are due to pneumonia caused by particulate matter (soot) inhaled from household air pollution.
Question unanswered? Contact us!