20-10-2012, 12:23 PM
Solar Thermal Power Generation
Solar Thermal.pdf (Size: 680.46 KB / Downloads: 48)
Cylindrical Parabolic Concentrator
(Trough Concentrator)
•Medium Temperature
Paraboloid Dish
•High Temperature
Central Tower
•High Temperature
Components
Parabolic Trough Concentrators
• single-axis-tracking
• axis: north-south horizontal
Reflector, Frame, Receiver
Thin/ Thick glass, Front/Back surface
mirror
Heat transfer fluid/Steam generation unit
•Synthetic oil (Therminol, Dowtherm)
•Mineral oil
•Pressurised water
•Water/steam
•Silicon oil
•Nitrate salt
Arizona plant: Commissioned 2006
Area of Trough collectors : 10 346 m2
Collector fluid : Thermic fluid
300oC
Organic Rankine cycle
n-pentane : working fluid
Vapour : 22.3 bar, 204oC
Cycle efficiency : 20.7 per cent
Annual generation : 2000 MWh
Challenges
• High marketing and engineering effort
• Decision-making process
(be it private sector or public sector)
• Reliable energy supply
• Demonstration
• Operating experience
Issues
• Define a road map
• Build and run a plant
(demonstration, operating experience,
research-cum-testing facility)
• Appropriate component design
• Heat transfer fluid
• Storage: yes/no, type