Like a gas or coal power plant, a concentrated solar power plant feeds a steam turbine to produce electricity, but using sunlight as a heat source. Proven technologies include parabolic trough collectors, tower power plants, and linear Fresnel systems. Following the principle of burning mirrors, they can heat water to high temperatures. These technologies address short-term intermittency. Electricity generation can indeed be extended for several hours after solar radiation disappears, as the heated fluid has thermal inertia. Dynamic heat storage systems can also be integrated into the installations. Another advantage is the possibility of cogeneration, i.e., using also the generated heat. Concentrated solar power plants require a lot of maintenance and water, especially for mirror washing, and are only profitable in high irradiance parts of the world, such as deserts. |