1. Pros & Cons of Solar Energy
Nihal Yağmur Aydın

2. Outline Introduction Pros & Cons of Solar Energy
Active Solar Energy Systems
Photovoltaic (PV) Systems
Solar Design in Architecture
Solar Powered Products for Home Use
Conclusion

3. Introduction
Solar energy usage has become an important issue recently. I thought that searching about it can give my friends and me an insight regarding this issue. Because of that, I chose this topic.

4. PROS of SOLAR ENERGY

5. Pro: Renewable, Abundant, Sustainable
Renewable: Solar energy will never be run out of itself due to estimations.
Abundant: The surface of the earth gets 120,000 terawatts of solar radiation (sunlight) – 20,000 times more power than what is needed to supply the whole world.
Sustainable: Solar energy can never be overconsumed.

6. Pro: Environmentally Friendliness & Good Availability
Environmentally Friendly: It doesn’t cause any pollution in general.
Good Availability: Sun is everywhere!
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7. Pro: Reduces Electricity Cost
By using solar energy, electiricity bills lowers due to usage of less power in the system.
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8. Pro: Silent
There is no moving part while using solar energy. All system is silent, meaning that it is suitable for general usage.
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9. CONS of SOLAR ENERGY

10. Con: Expensive
At first sight, some money needs to be invested during manifacturing. Also, if it is wanted to be used later, it needs to be stored and energy storage requires money.

11. Con: Intermittent
Solar energy is available only if there is sun. If the user want to use it at night, it needs to be stored which is quite expensive.
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12. Con: Exotic Materials
During manifacturing, some materials are needed which are rare in nature and they are quite expensive.
Copper indium gallium selenide (CIGS)  is used for solar cells.
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13. Con: Associated with Pollution
Some manifacturing process of solar energy causes greenhouse emissions. Transportation of materials also causes pollution.
Nitrogen trifluroide and sulfur hexafluoride has been used for production of solar panels.The impact of these gases is on global warming compared to carbon dioxide is about 1000 times greater.

14. Con: Requires Space
Power density, or watt per square meter (W/m²), is calculated when the manufacturers calculate how much power can be derived from the system.
If the density is low, it is better; so solar energy installation requires space.
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15. APPLICATIONS of SOLAR ENERGY

16. Active Solar Heating System
Solar collector collects the energy and distributes it to interior system via air or fluid.
It’s economical when the winter comes.
It reduces greenhouse gases and air pollution since it uses renewable energy.
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17. Photovoltaic (PV) Systems
This system uses photovoltaic process.
Radiation energy captured by solar cells in terms of photons is used to create electricity.
Pros: Easily extandible, transportable, no pollution
Cons: High cost for establishment
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18. Solar Design in Architecture
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Cybertecture Egg; Mumbai, India
This architecture uses photovoltaic panels and built as passive solar design.
Convention center for Taichung, Taiwan 
It benefits from photovoltaic panels.

19. Solar Powered Products for Home (1)
Mobile Phone Solar Battery Charger
Pro: Energy efficient, environment friendly
Con: Charging mobile phone: 3-5 hours
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20. Solar Powered Products for Home (2)
Solar Attic Ventilation Fans
Pro: It doesn’t use any power and cycles the hot air up for 15 times in one hour.
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21. Conclusion
Although setting up solar energy powered system on built environment can be costly during establishment, it saves energy which helps sustainability of the environment. In long term, it reduces cost as well.
We can use solar energy powered mobile chargers at least instead of using electiricity if we don’t use solar power systems at home.

22. References
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