Parabolic trough is a solar thermal energy technology characterised by a linear parabolic reflector that focuses the sun’s radiation onto a receiver positioned along the reflector’s focal line. The reflector is typically coated with highly reflective material to maximise the concentration of solar energy. The receiver, a tube coated with a material that absorbs this energy, converts it to heat, which is then used to heat fluid running through the tube.
This heated fluid is often oil or water, which, once heated, is used to generate steam. The steam drives a turbine connected to an electrical generator, thereby producing electricity. This process is known as solar thermal power generation. The design allows for high operating temperatures, which increases the efficiency of heat transfer and power generation. Solar fields employing parabolic trough technology are scalable and can be implemented in various sizes, from small, modular setups to large, utility-scale installations.
Parabolic trough systems are distinguished by their ability to integrate thermal energy storage systems, allowing for power generation even when sunlight is not available. This capability enhances the stability and reliability of the power supply from these systems. Moreover, the technology’s adaptability to hybrid operation, often combined with natural gas or biomass, enables continuous power production and helps meet peak electricity demands.
