world energy resourse 世界能源危机演讲PPT

3.3 Solar energy
Solar energy, radiant light and heat from the sun, has been harnessed by humans since ancient times using a range of ever-evolving technologies.
1.1 coal
Coal is the most abundant and burned fossil fuel. According to the International Energy Agency the proven reserves of coal are around 909 billion tonnes, which could sustain the current production rate for 155 years, But if at a 5% growth per annum this would be reduced to 45 years, or until 2051.
Remaining reserves of fossil fuel are estimated as:
These are the proven energy reserves; real reserves may be up to a factor 4 larger. Significant uncertainty exists for these numbers. However that quantitative measures of the amount do not take into account the cost.
Worldwide energy consumption (2008)
5 conclusion
We are now facing to an increasingly energy supply crisis. In the next ten years, increase the proportion of renewable energy will be the most effective way to solve the energy crisis!
With the advent of the automobile, airplanes and the spreading use of electricity, oil became the dominant fuel during the twentieth century. It’s said that decreasing production of oil could occur as early as 2018.
References
1. “World energy consumption”.Wikipedia 2. “Energy crisis”. Wikipedia
Thank you !
Solar energy technologies can make considerable contributions to solving some of the most urgent problems the world now faces. The International Energy Agency projected that solar power could provide a third of the global final energy demand after 2060.
Annual generation of nuclear power has been on a slight downward trend since 2007, decreasing 1.8% in 2009, and another 1.6% in 2011. Nuclear power met 11.7% of the world's electricity demand in 2011. 核电事故引发担忧
Hydropower is produced in 150 countries, with the Asia-Pacific region generating 32 percent of global hydropower in 2010. China is the largest hydroelectricity producer, with 2,600 PJ (721 TWh) of production in 2010, representing around 17% of domestic electricity use.
World energy resources
Contents
1.Fossil fuel 1.1coal 1.2oil 2.nuclear fuel 3.renewable resources 3.1 hydroelectricity 3.2 wind power 3.3 solar energy 4.energy consumption 5.conclusion
2. Nuclear fuel
As of 7 March 2013, the world had 434 operable reactors with 66 others currently under construction. Since commercial nuclear energy began in the mid 1950s, 2008 was the first year that no new nuclear power plant was connected to the grid, although two were connected in 2009.
The world's energy resources can be divided into fossil fuel, nuclear fuel and renewable resources.
fossil fuel
nuclear fuel
renewable resources
1 Fossil fuel
3.1 Hydroelectricity
Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the kinetic energy of falling or flowing water.
3.Renewable energy
Renewable energy is generally defined as energy that comes from resources which are naturally replenished on a human timescale such as sunlight, wind, rain, tides, waves and geothermal.
4 Energy consumption
According to IEA data from 1990 to 2008, the average energy use per person increased 10% while world population increased 27%. Regional enБайду номын сангаасrgy use also grew from 1990 to 2008: the Middle East increased by 170%, China by 146%, India by 91%, the USA by 20%, and world overall grew by 39%.
the Three Gorges Dam in China
3.2 Wind power
Wind power is growing at the rate of 30% annually, and is widely used in Europe, Asia, and the United States. Several countries have achieved relatively high levels of wind power penetration. As of 2011, 83 countries around the world are using wind power on a commercial basis.
1.2 oil
It is estimated that there may be 57 ZJ of oil reserves on Earth consisting of available, but not necessarily recoverable reserves, and including optimistic estimates for unconventional sources such as tar sands and oil shale.