The concept : “Linear concentration of solar energy by curved reflective surface”


Basic components : The Parabolic Trough concentrating solar mechanism is composed of the parabolic trough shaped reflective surface (mirrors), the metal structure, the tracking mechanism and the receiver.

Operation principle : The mirrors track the sun in one axis in order to concentrate the solar irradiation into the linear receiver located at the focal line. The receiver converts the concentrated irradiation to useful heat.

 Basic Characteristics  
  Shape of mirrors    Parabolic
  Type of concentration    Linear
  Sun Concentration Ratio    30 - 100
  Temperature Range   150 – 500 oC
  Heat Transfer fluid   Thermal oil, Molten salt, Pressurized water, 2 phase water
  Storage ability   Yes  

Basic Applications : The produced heat from the Parabolic trough collectors can be used for electricity generation by driving a turbine(or engine) connected to an electrical power generator, for steam generation by a heat exchanger, for cooling by driving  a thermal (or compression) chiller and for desalination by driving a thermal (or electrical) desalination unit.

Technology Variations : -