Concentrated solar power systems

Numerous energy plants today utilize fossil fuels as a temperature origin to boil water. The vapor from the boiling water spins a big turbine, which drives a generator to create electrical energy. But an innovative new generation of power flowers with focusing solar energy systems uses the sun's rays as a heat supply. The 3 primary kinds of focusing solar power systems tend to be: linear concentrator, dish/engine, and energy tower methods.

Linear concentrator systems gather the sunlight's power utilizing lengthy rectangular, curved (U-shaped) mirrors. The mirrors are tilted toward the sun's rays, concentrating sunlight on pipes (or receivers) that operate along the mirrors. The reflected sunshine heats a fluid streaming through pipes. The hot substance after that can be used to boil water in a conventional steam-turbine generator to create electricity. There are two major types of linear concentrator systems: parabolic trough systems, in which receiver pipes are placed over the focal type of each parabolic mirror; and linear Fresnel reflector systems, in which one receiver pipe is positioned above a few mirrors to allow the mirrors higher transportation in monitoring the sun's rays.

A dish/engine system uses a mirrored meal similar to a very large satellite meal, although to reduce expenses, the mirrored dish is usually consists of many smaller level mirrors formed into a dish shape. The dish-shaped surface directs and concentrates sunshine onto a thermal receiver, which absorbs and collects the heat and transfers it on motor generator. The most frequent style of heat engine utilized these days in dish/engine systems is the Stirling engine. This method utilizes the liquid heated by the receiver to go pistons and create technical energy. The mechanical power is then used to run a generator or alternator to create electrical energy.

A power tower system uses a big area of flat, sun-tracking mirrors generally heliostats to target and concentrate sunlight onto a receiver at the top of a tower. A heat-transfer fluid heated into the receiver can be used to generate vapor, which, subsequently, is employed in a regular turbine generator to create electricity. Some power towers utilize water/steam due to the fact heat-transfer fluid. Various other advanced level designs tend to be experimenting with molten nitrate salt due to the exceptional heat-transfer and energy-storage capabilities. The energy-storage ability, or thermal storage space, enables the machine to carry on to dispatch electrical energy during cloudy weather condition or at night.

Source: www.nrel.gov
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