Active solar energy

renewable energy Active solar energy

1. ACTIVE SOLAR ENERGY Abu-alkhail mohammad

2. Solar energy Radiation energy produced by sun Clean, renewable source of energy. Converted into usable energy such as electricity

3. Solar energy used in two ways : 1.Passive solar energy:- Direct use for heating/lighting/drying/ventilation purposes.(in natural manner) Example-lighting in homes through windows or green buildings concept. 2. Active solar energy:- Conversion to electricity with the aid of special instruments like uses of the mechanical elements to provide either heating or cooling. Example- solar water heating system, solar thermal power plant.

4. Active solar energy In active solar energy the system uses mechanical equipment such as pumps and blower and other type of equipment to collect, store and convert solar energy also use when solar energy is not enough. In this type of energy: once the energy from the sun is absorbed, it is stored for later use. Active solar techniques increase the supply of energy.

5. Example of active solar energy system Most common example of active solar energy is-solar water heating system. Solar water heating saves approx. 1000 megawatts of energy a year, equivalent to eliminating the emission from two medium sizes coal burning power plants. By using solar water heating over gas water heating, a family will save 1200 pounds of pollution each year.

6. Solar collector Glass on outside Absorbent on inside Circulating fluid

7. Others examples of active solar energy: Solar energy power plants. Concentrating solar power And photovoltaic

8. Concentrating solar power(CSP) Converted sun energy into high temp. heat energy The heat energy used to generate electricity in a steam generator.

9. largest CSP plant ( California, United States) Ivanpah Solar Power Facility Location: California, United States Commission date: Feb, 2014 Capacity: 354 megawatts(MWh) Generates power for 140,000homes The Ivanpah installation reduces carbon dioxide emissions by over 400,000 tons annually.

10. CSP plant in India Neemuch , India Welspun solar MP project Capacity: 150 MWh

11. Photovoltaic Tracking solar panels rotate as the sun moves through the sky to maximize the amount of electricity then can produce.

12. Canal Power Project in India

13. Advantage of active solar energy:- Long term cost effectiveness in colder climates- -It is very effective in colder climates, where interior heating is necessary during most of the year. - Free sunlight can save thousand of dollars a years in utility bills in areas with long winters. Low maintenance- -Generally , maintenance with solar heating system will involve keeping the solar panel clean and unobstructed from snow, bird dropping , tree branches and other debris. - On average solar heating system require a mere 8 to 16 hours of routine maintenance per year. -It is also worth nothing that many grid- tie solar heating systems come with warranties at least 10 years.

14. Silent operation The silent operation of solar heating systems is due to minimum presence of moving parts. There is absolutely no noise resulting from the some of solar heating systems.

15. Environment & health issue Cadmium – Cadmium is used in cadmium telluride solar cells as a semiconductor to convert solar cells energy into electricity. - Though used in very small amounts, it is extremely toxic and can build up in a given ecosystem if it isn't monitored. Electromagnetic Radiation From Solar Panels - Modern solar systems use components that radiate high levels of radio frequency electromagnetic radiation, which poses health risks to those with electromagnetic hypersensitivity (EHS). - some of the symptoms of this health risk are common and nonspecific, such as headaches and restlessness.

16. Disadvantage of active solar energy Space requirement Active solar systems rely on the sun to heat liquid. weather the liquid is water or an antifreeze mixture. To generate enough hot liquid to be useful, a large space is required.

17. Cost problem

18. Thank you