Concentrated solar power (CSP) harnesses sunlight to generate thermal energy through a series of mirrors and lenses that focus solar radiation onto a small area, typically a receiver. This process converts light to heat, which can then be used directly or stored for generating electricity. Unlike photovoltaic systems that convert sunlight directly into electricity, CSP systems utilise the heat from the sun’s rays to drive steam turbines or engines that produce electrical power.
CSP technology includes various configurations such as parabolic troughs, solar power towers, and dish Stirling systems, each suited to different applications and scales of operation. Parabolic trough systems use curved mirrors to focus sunlight onto a receiver pipe running along the focal line, heating a fluid that generates steam for electricity production. Solar power towers centrally locate a large field of mirrors to concentrate light onto a receiver atop a tower, producing high temperatures that yield greater efficiency. Dish Stirling systems, on the other hand, consist of a parabolic dish that concentrates light onto a smaller receiver connected to a Stirling engine.
The scalability of CSP plants allows for significant electricity production, making them valuable for utility-scale renewable energy projects. These plants also offer the advantage of thermal energy storage, enabling them to provide power during periods without sunlight, such as nighttime or cloudy conditions, thereby offering a stable and dispatchable source of renewable energy. The integration of CSP technology with existing thermal power infrastructure can further enhance grid stability and reduce dependency on fossil fuels.
