✏️The collector consists of two axis tracking.
✏️Parabolic dish reflector that focuses incoming sunlight onto a engine/generator.
✏️The engine uses stirling thermodynamic cycle to produce electricity without producing steam as intermediate step ✏️The dish reflector moves continuously face towards the sun.
✏️It produces 3 to 25kw per each engine.
ADVANTAGES:
1. Reflecting surfaces require less material and are structurally simpler than flat plate collectors. (less cost ).
2. The absorber area of a concentrating system is smaller than that of a flat plate system for same solar energy collection.
3. Loss of energy after collecting is less than FPC, because of large absorber area in FPC, working fluid can attain higher temperature.
4. Owing to the small area of absorber per unit of solar energy collecting area, selective surface treatment and/or vacuum insulation to reduce heat losses and improve collector efficiency are economically feasible.
5. Can be used for electricity power generation.
6. Heat storage costs are less.
7. Little or no anti freeze is required to protect the absorber.
8. It is possible to get higher efficiencies.
DISADVANTAGES :
1. Only beam component is collected.
2. Costly oriented systems.
3. Additional requirements of maintenance is required.
4. Non uniform flux on the absorber.
5. Additional optical losses such as reflectance loss and the intercept loss, so they introduce additional factors in energy balances.
6. High Initial cost.
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