Solar Energy By: Mary Erikson. What is solar energy?  Renewable energy source radiated from the sun, harnessed and transferred into useable energy.

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Presentation transcript:

Solar Energy By: Mary Erikson

What is solar energy?  Renewable energy source radiated from the sun, harnessed and transferred into useable energy.

Types of Solar Energy  Passive Solar  Concentrating Solar Power  Photovoltaic (PV)  Hot Water Solar  Solar Process (commercial)

Passive Solar  When the design of the building is centralized around taking full advantage of of all types of solar energy given off in the daylight.

Passive Solar  Windows are mostly facing the south side- this is because it receives the most sunlight during the day

Passive Solar  Can save up to 30% on heating and cooling bills on average  5% for energy cost for lighting  Would have to spend roughly 15% more per sq ft with passive solar energy construction  Long term pay off

Henry P. Glass Home  Northshore (Chicago) 1948

Concentrated Solar Energy

Concentrating Solar  Industrial  Uses thousands of U-shaped mirrors to concentrate sun’s rays to a 550 foot receiver where it harnesses that heat to heat a fluid that then heats the water and turns into steam to turn the turbine  deo_csp.html

Photovoltaic  b8sjc b8sjc b8sjc  Primary domestic electricity use for heating and cooling  Technology used for solar energy cars however not realistic

Solar Water Heating  h9I h9I h9I  Expensive compared to natural gas

Solar Process Heat  Heating and cooling for large commercial and industrial buildings  Can use same technologies in addition to these (PV, passive solar)  3 Main Uses-  Space heat  Water Systems  Solar Cooling(TACS)

Space heat

Pro’s and Con’s? Pro’s  Renewable  Ability to harness energy in regions that are not linked to a national grid  No direct pollution (only from manufacturing of product)  Can be very effective in certain spots on the globe (near equator)  Eventually will pay for itself after a number of years  Little maintenance after it is installed Con’s  Expensive to install  Unrealistic to be able to meet the needs of the world’s energy consumption  Can’t transfer energy efficiently (must be used on spot)  Low efficiency rate (15-25%)  Needs a lot of solar panels to create sufficient energy (takes up lots of land)  Needs sunlight (can’t produce energy during night time)

What’s wrong?  Due to the low efficiency rate and the energy consumed by the cables when transferring it, it is unrealistic to be able to transfer solar energy anywhere further than 2 miles from the source.  To meet current US electricity needs with the current technology we would need to use a piece of land as big as New Hampshire and Rhode Island combined. This would also have to be in a desert like location where there is a plethora of sun.  Prices are still uncompetitive with those of fossil fuels

Progress?  All sectors of Solar Energy experienced grown from 2011 to 2012 with instillations up 76% in one year  In past 3 years cost of solar energy has dropped over 70%  On Oct 22, 2013 a $60 million support innovative solar energy research and development in part of President Obama’s Climate Action Plan. This is efforts to drive down solar energy costs even further

What to do…  Solar power’s main use should be domestic, not transportation or industrial use.  By year 2020 have 10% of US domestic electricity demand be solar energy.  5% total energy demand to come from solar by year 2050  Increase the efficiency of the solar panels to 30-40% production as well as finding a better way to transfer the energy opposed to energy-dissipating cables and improve the battery technology

THE END

Sources  tml tml tml   gy-overview/solar/ gy-overview/solar/ gy-overview/solar/  announces-60-million-drive-affordable-efficient- solar-power announces-60-million-drive-affordable-efficient- solar-power announces-60-million-drive-affordable-efficient- solar-power  didnt-know-about-solar-energy