by abhishek | Aug 30, 2020 | Renewable Sources of Energy
The devices which convert solar energy directly into electricity are called solar cells. Solar cells are made from thin layers of semi-conductor materials such as silicon and gallium. Semiconductors are those substances which have electrical conductivity more than...
by abhishek | Aug 30, 2020 | Renewable Sources of Energy
The device in which solar energy is directly used to heat the water is called solar water heater. Construction of solar water heaterIn solar water heaters, a pipe of copper with its outer surface painted black is fitted in the form of a coil in a box which is painted...
by abhishek | Aug 30, 2020 | Renewable Sources of Energy
A spherical reflector type solar cooker consists of a large spherical (concave) reflector which reflects the sun’s energy to a single focus point due to which a high temperature is produced in the focus area. Since, a spherical reflector type solar cooker reflects and...
by abhishek | Aug 30, 2020 | Renewable Sources of Energy
Construction of Box Type Solar CookerThe main parts of a box type solar cooker are: An insulated metal box painted black from inside. A glass sheet. A plane mirror as reflector. Principle and Working of Box Type Solar CookerIt is well known fact that a black coloured...
by abhishek | Aug 30, 2020 | Renewable Sources of Energy
We have studied that sunlight consists of infra-red rays. The heat of infra-red rays can be utilized to do some useful works by preparing suitable devices. Those devices which directly utilize solar energy to do some useful works are called solar energy devices. Solar...
by abhishek | Aug 30, 2020 | Renewable Sources of Energy
The green house effect is produced by carbon dioxide gas present in the atmosphere of earth. We have studied that sunlight consists 3 types of rays; Ultraviolet rays Visible light and Infra-red rays The infra red rays emitted by the sun are usually of short...
Recent Comments