- Research Institute for Photobiological Hydrogen Production
Our need for the explotation of renewable energy
The Amount of Solar Energy is Huge
The amount of solar energy is huge (2.7 × 1024 J/year) But low in intensity ( about 1,500 kWhm -2yr-1 )
Quantity (1018J/year) |
Ratio (vs. fossil f.) |
|
---|---|---|
World Fossil fuel consumption |
417 | 1 |
(Social primary energy use) | (513) | (1.23) |
Photosynthesis (net production) |
4,200 | 10.4 |
Solar energy (received on Earth's surface) |
2,700,000 | 6,500 |
Human digestive energy intake | 20 | 0.05 |
We are consuming a huge amount of energy !
Digestive energy intake | 2000kcal/day/capita |
---|---|
Social energy from fuels world | 20 times |
US | 100 times |
Japan | 50 times |
China | 15 times (2010) |
about 5% of the world's energy use from fossil fuels.