Renewable Energy Sources

1
Renewable Energy Sources

• Hydropower
• Biomass
• Geothermal
• Ocean thermal conversion
• Wave and Tidal power
• Solar power
• Wind power

2
Global energy consumption by source (in
quadrillion (1015) BTU)
Category Other 1.4total
Source Energy Information Agency
(http//www.eia.doe.gov/)
3
US energy consumption by source (in quadrillion
(1015) BTU)
Category Other 3.4total
Source Energy Information Agency
(http//www.eia.doe.gov/)
4
US energy consumption by source (in quadrillion
(1015) BTU)
Category Other is made up of
Source Energy Information Agency
(http//www.eia.doe.gov/)
5
Solar Power
World annual energy consumption
US annual energy consumption
Annual energy reaching the earth from the sun
6
Solar Power Balance
Solar power received by the earth 1741015 W
(5.5 1024 J/a) 26 are reflected by atmosphere
and clouds 19 are absorbed by atmosphere and
clouds 4 are reflected by the earths
surface 51 are absorbed by the earths
surface Solar power available on surface
95.71015 W
Santa Maria 246 W/m2 Phoenix 271 W/m2 NYC
(Central Park) 192 W/m2 Anchorage 125 W/m2
7
Solar Radiation
8
Energy Conversion with a Wind Turbine
9
Wind Power
10
Global Potential of Solar and Wind Power
Global energy consumption 4.451020
J ( 12.41013 KWh or 10,595 Mtoe)
Electric potential of solar power 1) 1.881020
J ( 5.21013 KWh or 4,472 Mtoe)
Electric potential of wind power 2) 1.801020
J ( 5.01013 KWh or 4,286 Mtoe)

2.271020 J ( 6.31013 KWh or 5,405 Mtoe)
1) Assumptions 0.1 of total land area
harvested, 20 conversion efficiency, av. solar
power 200 W/m2 2) Assumptions 10 of global
electric potential of wind power realized