EE6801- ELECTRICAL ENERGY GENERATION UTILISATION AND CONSERVATION TWO MARKS QUESTIONS AND ANSWERS
EE6801 TWO MARKS QUESTIONS AND ANSWERS UNIT 4
Unit IV Two mark
1.What are the components of solar energy?
- Storage unit
2.What is concentration ratio?
Concentration ratio is defined as the ratio between the aperture area and the receiver absorber area of the collector.
3.List the various types of solar energy collectors.
1.Stationary collectors (or) Non- concentrating
- Flate plate collectors
- Compound parabolic collectors
- Evaculated tube collectors
2.Sun tracking concentrating collector
- Single axis tracking
- Two-axis tracking
4.List any four applications of solar collectors.
- Solar water heating
- Solar space heating systems
- Solar refrigeration
- Industrial process heat systems
5.List the four important solar systems.
- Low temperature cycles using flat plat collector or solar pond
- Power tower or central receiver system
- Distributed collector system
- Concentrating collectors for medium and high temperature cycle
6.List the advantages of solar Energy.
- Solar energy is free from pollution
- They collect solar energy optically and transfer it to a single receiver, thus minimizing thermal-energy transport requirements
- They typically achieve concentration ratios of 300 to 1500 and so are highly efficient both in collecting energy and converting it to electricity.
- The plant requires little maintenance or help after setup
- It is economical
7.List any four disadvantages of solar energy.
- Avilable in day time only
- Need storage facilities
- It needs a backup power plant
- Keeping back up plants hot includes an energy cost which includes coal burning