The Parabolic trough technology has the longest commercial track record of all the CSP technologies. The Parabolic trough power plants are congruous for immense-scale use in the range of 10 to 300 MW electrical output. This technology can supersede conventional thermal power plants without any qualitative changes in the electrical grid structure. The turbines of CSP plants can generate power in low solar radiation periods at night, distributing power reliably on a orchestrated schedule while keeping the grid stable. The method of using parabolic-shaped troughs with reflective surface is done by directing the sun’s energy towards a thin pipe running along their focal point. As the sun’s rays become concentrated, they reach intensities up to 100 times their original state. As a result, a very high temperature is reached within the focal point. To collect this thermal energy, heat-transfer fluids are pumped steadily through the pipes and used to produce power-generating steam. Another variation of this technology is the use of mirrored strips, called Fresnel reflectors in the parabolic reflection system.
Parabolic troughs are the most mature form of CSP technology and the most advanced in generating energy with maximum efficiency. The benefits of this technology are far more than any other form of energy production, as this is one of the cleanest forms of engendering power without causing any damage to the environment. The parabolic trough has a very interesting process of ensuring capture of solar energy. To produce the extreme temperatures required in thermal concentration, systems can maximize efficiency and solar concentration by tracking the sun’s course throughout the day. Through this, there is no loss in the energy that can be engendered in a day, which furthermore ensures that there is a steady and smooth power generation without interruptions. Parabolic trough systems can be mounted on a single day axis of rotation, typically aligned along a true North meridian that follows the sun’s course throughout the day. By incorporating a small array of parabolic troughs with innovative power turbines, we can extract energy efficiently from low vapour quality thermal fluids. This sanctions an incipient breed of minuscule scale concentrated thermal projects at a low cost.