Information about Solar Furnace
Solar Furnace. Furnaces initially used wood or coal as conventional fuel. The need for the fuel is always increase. Because of that, people have to use the other naturally occurring resources, which are in surplus, like the solar energy. The solar energy can be used efficiently, for a variety of purposes. Like the solar furnaces, cookers, heaters or greasers etc. And it can also be used to produce electricity. The basic principle of these devices is concentrating the sun rays onto the desired point to generate very high temperatures. The concentration of sun rays is achieved by using convex lens. Then, the heat that generated can be converted to any form of energy.
Basically this system requires the mirror to have curvature to refract the rays to the desired point. The usage of convex lens with large size is not a feasible idea. The mirrors can be arranged that it resembles and make a large convex lens. A higher temperatures can be produced by positioning the mirror that will reflect the ray completely. With the number of mirrors and/or the angle of the position, the amount of heat generated can be controlled.
The cost effectiveness of solar furnace is due to the fact that the convex lens can be replaced with a other cheaper version of Fresnel lens. The Fresnel lens is made of plastic, but can be grooved to the required thickness. This type of mirror will reflect the sun rays to the focal point.
The cheaper versions of the solar furnace require a mount to hold these mirrors. In case of the mirror is fixed only in one position, it cannot use the ray’s all through the day. It might be very useful, providing the heat continuously, if the mount that holds these mirrors are made to track the sun through the day.
The dependent on the sun is only con with such furnace. Solar furnace will no use, if the sky is cloudy all the time. Hence where the sun’s ray is very limited, it cannot be used in the geographical areas.