Berikut energi yang dapat diperbaharui yang berasal dari angin, laut, matahari, dll. Mungkin ini alternatif yang patut dikembangkan jika minyak dan gas sudah habis.
Salam The world population in the year 2100 will be in excess of 12 billion. If the current trends in technological progress and innovation continue, the demand for energy then will be five times greater than what it is now. If we continue the policy of using coal, oil and gas at the present rate, then by the year 2010 the global temperature will have increased by two degrees Celsius . We do not need reminding of the adverse effects of this: the increased risk of flooding in lowland areas, the processes of desertification, and changing climate all over the world. It is a known fact that at the present moment renewable energy contributes only 11% to our primary energy . If we intend to do something about our planet, to safeguard our future and to create a healthy environment for the generations to come, then we must all actively utilize renewable energy in our daily life. It is expected that 60% of all our energy will come from renewable energy by the year 2070. The sooner we employ the attitude that today is better than tomorrow, the greater the opportunity to increase this figure to 80%. http://www.wrenuk.co.uk/home.html Renewable Energy Bioenergy Geothermal Hydrogen Hydropower Ocean Solar Wind http://www.eere.energy.gov/ Wind Energy Topics Wind energy uses the energy in the wind for practical purposes like generating electricity, charging batteries, pumping water, or grinding grain. Large, modern wind turbines operate together in wind farms to produce electricity for utilities. Small turbines are used by homeowners and remote villages to help meet energy needs. More basic information about wind energy is also available. Wind Energy Technologies Modern wind turbines are divided into two major categories: horizontal axis turbines and vertical axis turbines. Old-fashioned windmills are still seen in many rural areas. Wind Turbine Use Wind turbines are used around the world for many applications. Wind turbine use ranges from homeowners with single turbines to large wind farms with hundreds of turbines providing electricity to the power grid. Research Research advances have helped drop the cost of energy from the wind dramatically during the last 20 years. Research is carried out by research labs, universities, and utility organizations. Wind Resource The wind is the fuel source for wind energy. The United States has many areas with abundant winds, particularly in the Midwest and Great Plains. Understanding the wind resource is a crucial step in planning a wind energy project. Detailed knowledge of the wind at a site is needed to estimate the performance of a wind energy project. Environment Wind energy is considered a green power technology because it has only minor impacts on the environment. Wind energy plants produce no air pollutants or greenhouse gases. However, any means of energy production impacts the environment in some way, and wind energy is no different. Economics The cost of energy from the wind has dropped by 85% during the last 20 years. Incentives like the federal production tax credit and net metering provisions available in some areas improve the economics of wind energy. http://www.eere.energy.gov/RE/wind.html Ocean Topics Ocean energy draws on the energy of ocean waves, tides, or on the thermal energy (heat) stored in the ocean. More basic information about ocean energy is also available. Technologies Wave Energy The total power of waves breaking on the world's coastlines is estimated at 2 to 3 million megawatts. In favorable locations, wave energy density can average 65 megawatts per mile of coastline. Tidal Energy Tidal energy traditionally involves erecting a dam across the opening to a tidal basin. The dam includes a sluice that is opened to allow the tide to flow into the basin; the sluice is then closed, and as the sea level drops, traditional hydropower technologies can be used to generate electricity from the elevated water in the basin. Some researchers are also trying to extract energy directly from tidal flow streams. Ocean Thermal Energy Conversion (OTEC) Systems A great amount of thermal energy (heat) is stored in the world's oceans. Each day, the oceans absorb enough heat from the sun to equal the thermal energy contained in 250 billion barrels of oil. OTEC systems convert this thermal energy into electricity � often while producing desalinated water. http://www.eere.energy.gov/RE/ocean.html --- George Tewu <[EMAIL PROTECTED]> wrote: > Halo semua, > Kmrn saya baca koran Handelsblatt edisi 20-22.08.04. > Di halaman 13 > disbutkan data tentang penggunaan PLTAngin. > > Diperkirakan thn 2004 listrik yg bisa dihasilkan > sebesar 14.6 > Gigawatt dan diproykesikan thn 2007 sebesar 22.8 > Gigawatt.Besar juga > ya? > > Untuk mendapatkan efisiensi yg tinggi, negara2 Eropa > memasang kincir > mereka di daerah laut (masuk akal karena di laut > lebih banyak > anginnya). Konsekuensinya, investasi ternyata lebih > mahal he3... > > Demikian berita dari saya. > > Salam Damai, > George > > ===== Visit my daughter's homepage at: http://www.geocities.com/hana_hanifah7 __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - Send 10MB messages! http://promotions.yahoo.com/new_mail ------------------------ Yahoo! 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