Thursday, October 24, 2013

Kalan de Araw

The Kalan de Araw.
It take only 30 minutes continues sun exposure to cook steam rice on a black deep pan with black cover.
You may put weight on legs and tie the arm from moving when strong wind is blowing.
Use mirror finish as a reflector on a 950 mm diameter steel paraboloid.
Arm tube is formed from 3/4 inch Steel Pipe.
Reflector ring is formed from 1/2 inch steel Pipe.
This  is a prototype drawing.

A solar cooker, or solar oven, is a device which uses the energy of direct sun rays (which is the heat from the sun) to heat, cook or pasteurize food or drink. The vast majority of solar cookers presently in use are relatively cheap, low-tech devices. Because they use no fuel and cost nothing to operate, many nonprofit organizations are promoting their use worldwide in order to help reduce fuel costs (for low-income people) and air pollution, and to slow down the deforestation and desertification caused by gathering firewood for cooking. Solar cooking is a form of outdoor cooking and is often used in situations where minimal fuel consumption is important, or the danger of accidental fires is high.

Solar cookers use no fuel, which means that their users do not need to fetch or pay for firewood, gas, electricity, or other fuels. Therefore, over time a solar cooker can pay for itself in reduced fuel costs. Since it reduces firewood use, the solar cooker reduces deforestation and habitat loss. Since there are about 2 billion people who are still cooking on open fires, widespread use of solar cookers could have large economic and environmental benefits.
Solar box cookers attain temperatures of up to about 165 °C (325 °F), so they can be used to sterilize water or prepare most foods that can be made in a conventional oven or stove, from baked bread to steamed vegetables to roasted meat. When solar ovens are placed outside, they do not contribute unwanted heat inside houses.