For sustainable energy
Sun is a potentially inexhaustible source for energy. The advantage of using solar energy is that it is free and super abundant. In the view of global warming, with energy policies calling for wide-scale use of renewable and sustainable technolgies, solar projects are proving invaluable in reducing the dependency on fossil fuel. While PV technology produces electricity directly from any sunlight, CSP technology uses mirrors to concentrate solar radiation into a receiver, where a transfer medium absorbs the heat and utilizies in a heat exchanger to generate steam or conventional regenrative water-steam cycle, which feeds a turbine to generate electricity. Various alternatives CSP technologies (Central Tower, parabolic Trough, Linear Fresnel) are available to produce live steam with diferent parameters, from saturated to the highest superheated steam conditions. CPS plants with an integrated thermal storage sytem like molten salt allow higher utilization of the power block, even in absence of sun, and with the possibility of producing electricity on demand.
Solar power technologies
Since past two decades, solar thermal energy has been a proven technology. Solar energy can be harnesses by incorporating different technologies and parabolic through collector type plant is most commonly used. Alternate technologies are fast catching up, such as Linear Fresnel colector plants with flat mirrors and central tower plants with slightly curved mirrors or heliostats. Thwe basic principle is the same for all three plant technologies. Mirrors concentrate the incident solar radiation onto a receiver where it is converted into heat that is used to produce steam to drive a steam turbine. Heat storage systems like molten slat tanks provide for power supply even during unfavourable weather conditions or at night. They significantly increase the number of full-load operation hours with optimal steam turbine efficiency.
Critical to Quality (CTQ) aspects of CSP plants:
With its broad steam turbine portfolio, Triveni turbines offers a wide range of turbines for different types of solar plants. The turbine technology fits all three common concentrated solar power (CSP) concepts. Triveni’s design addresses CTQ aspects of CSP plants very efficiently.
Steam turbine parameters for CSP plants
Power output – up to 30 MWe
Steam turbines operates on 3 modes: