Gigantic Expanding Spheres! (p.9) - Prof Bunsen

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RENEWABLE ENERGY Solar Modules Page 17 Aussie Solar Cooker Start using the Sun’s free energy today. Prepare a tasty meal to convince students of the Sun’s huge energy contribution. Within a few hours of sunshine the Solar Cooker can prepare tasty meals for 5 to 6 people cooking at gentle temperatures and preserving nutrients without burning. The Solar Cooker consists of cardboard and reflective foil and is shaped to reflect maximum sunlight onto a black cooking pot that coverts radiant energy into thermal energy. A heat-resistant bag (2 included) around the pot acts like a greenhouse by allowing energy in but preventing heat to escape via convection or conduction. Size: Folded 35 x 35 cm Unfolded 90(l) x 60 (w) x 34 (h) Mass: 0.65 kg Age: 8+ with adult supervision H18 A$ 34.00 Stirling Engine Kit When air is heated it expands and when it is cooled it contracts. This principle makes the cyclical motion of a Stirling engine possible. It is a simple, environmentally friendly heat engine, continuously converting thermal energy (heat) from an external source (your body) into mechanical energy. The engine runs on heat from a cup of hot water or your warm hand. This is a quality German made product and easy to construct. Takes an hour with average skills. Full instructions included. Required: Screwdriver and wood glue Age: 14+ E30 A$ 79.00 VIDEO ONLINE Solar Vacuum Heat Collector Tube One of the best inventions of the decade from Australia! The solar vacuum heat collector tube is the best thermal collector on the market. It consists of a strengthened double-wall borosilicate glass tube with the area between the inner and outer walls evacuated. This acts as a thermos to keep heat from escaping into the atmosphere via conduction and convection. While the outer wall is fully transparent to allow solar energy to pass through unimpeded, the inner layer is treated with a selective black optical coating which absorbs IR energy radiation with minimal reflection. As the tubes are round, they act as passive tracking solar collectors too. In full sunlight pasteurization temperatures can be reached in less than 30 minutes and water will boil in 50 minutes. See website + video. Size: 58 (diam.) x 500 mm These tubes are tough enough for use in classroom demonstrations. Age: 12+ with adult supervision H13 Only A$ 12.00 each VIDEO ONLINE Let the sun boil water! 24 order online: www.profbunsen.com.au
SUSTAINABILITY Solar Science Pack Explore the science of solar heating. Build a miniature solar water heater from the panel and tubes supplied to heat and pasteurize water. Then turn a foil cardboard into an amazing solar cooker, naturally fueled by solar energy. Fry a marshmallow or cook some food using the Sun. Age: 9+ E09 A$24.00 E09 Clean Water Science Pack Construct a water filter column from the supplied components to filter your prepared dirty water. Then purify water using a solar distillation process and solar pasteurization process. Our Solar Vacuum Heat Collector Tube (p 24) can add further value to this important environmental pack. Age: 9+ E12 A$ 24.00 Eco Science Toys Go Green by preparing fun science toys from kitchen waste materials. Create a tornado in a soft drink bottle, make a gravity powered walking toy and a hover disc from a waste CD, build a CD racer, make a string walkie talkie, prepare a shopping bag parachute and more. Included: 12 page colour instruction booklet and all important parts. You supply the recycled material. Age: 8+ E11 A$ 24.00 E12 Eco Biker Wind Power Kit Create memorable, educational moments! Clip the Eco-Biker to a bike’s handlebars or anywhere with a breeze and watch as the fan powers a LED light. The stronger the wind, the faster the Eco-Biker pedals and the brighter the LED shines. Age: 8+ E13 A$ 17.50 E13 E11 Prices include GST more products & descriptions online 25
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Gigantic Expanding Spheres! (p.9) - Prof Bunsen

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