Most solar cookers work on the basic principle: Sunlight warms pots and/or food, which is used for cooking. A solar cooker lets the UV light rays in and then converts them to longer infrared light rays that cannot escape. Infrared radiation has the right energy to make the water, fat, and protein molecules in food vibrate vigorously and heat up. It is not the sun’s heat that cooks the food, nor is it the outside ambient temperature, though this can somewhat affect the rate or time required to cook, but rather it is the sun’s rays that are converted to heat energy that cooks the food, and this heat energy is then retained by the pot and the food by the means of a covering or lid. This occurs in much the same way that a greenhouse retains heat or a car with its windows rolled up. An effective solar cooker will use the energy of the sun to heat a cooking vessel and efficiently retain the energy (heat) for maximum cooking effectiveness.
Tuesday, 9 March 2021
Friday, 5 March 2021
Design Consideration of Micro Hydro Power Plant
Micro-hydroelectric power is both an efficient and reliable form of a clean source of renewable energy. It can be an excellent method of harnessing renewable energy from small rivers and streams because it requires very little or no reservoir to run the turbine. The water will run through the turbine and goes back to the river or stream, and can use for other purposes. The Micro-hydroelectric power plant has minimal environmental on the local ecosystem. The power generation of MHP is between 5-100 kW. To Design an MHP, there are many considerations to be taken into account:
