Sustainable energy and saving energy tips

Sustainable energy is defined as energy that is renewable and efficient. It has to be the answer to human needs without impacting the global environment. That is green energy produced by using the capacity of sun light, wind energy, wave power etc.
The global energy demand is growing every year, so it’s really important to develop this energy sector. In 2008 almost 19% of the global energy demand is coming from renewable sources. Review the examples below and keep in mind the property waste clearance matter as a factor of major importance, when it comes to alternative energy generating process.
Development and prospects for use
Although many renewable energy projects are “Large-scale”, they also could be used in areas where it is hard to provide energy using the common ways. For example- 3 million households are supplied with electricity from small photovoltaic systems. Over 30 million village households use for lighting a biogas derived from local installations.
Renewable energy is derived from natural processes that are renewable themselves. Each of these sources has unique characteristics:
Sustainable energy and saving energy tips
Wind energy
The currents can be used to power wind turbines. The range of modern wind turbines is from 600 kilowatts to 5 megawatts. The wind turbines can be two types- horizontal-axis or vertical-axis.
Preferable places for wind farms are places where the wind is more powerful. It’s important to be said that the wind turbines are useful even as a stand-alone devices. They can work great in a combination with solar cell systems.
Water energy
The movements of water make a kinetic energy that can be transformed into electricity. Interesting fact is that humans have been using this kinetic energy for thousands of years. Today the transformed water energy known as hydropower is the renewable power that people use most often.
Sustainable energy and saving energy tips2
Solar energy
Solar energy is derived from the sun’s energy. Solar energy is considered as noise and pollution free. It can be used in many ways, for example:
• Generating electricity using photovoltaic solar panels. You can see them on rooftops, spacecrafts or handheld calculators.
• Generating electricity using concentrated solar power.
• Generating hydrogen using photo-electrochemical cells. Major markets for these cells are United States, Japan, Germany
• Heat buildings directly using solar constructions.
• Even warming food using solar ovens.
Geothermal energy
Geothermal energy is energy made from the Earth’s heat. It’s sustainable and clean. Geothermal energy’s resources are:
• Hot water.
• Hot rocks situated a few kilometers beneath the surface.
• Magma (molten rocks)
For capturing the geothermal energy, scientists use geothermal heat pumps. They are heating systems that transfer heat water to the ground. After that the water is captured and used for producing electricity.
Seismically active spots are preferable places for producing a geothermal energy. Because the temperature there is really high and the Earth’s crust is broken up and the water can circulate on the surface.
Biofuel
During the photosynthesis the plants grow and generate biomass. Biomass can be used directly as a fuel or to produce biofuels. Burning biofuels releases the chemical energy which is stored in them. Biofuel can be made of different materials including manure, crop waste or other byproducts. But it takes a really long time to be produced.
• Types of biofuel:
The most common biofuel is biodiesel. It’s made of fats or oils using transesterification. It is compatible with every diesel engine.
Methanol- It has about 1/3 to ½ as much power as methane. But methanol is in liquid form so it is easier to transport than the methane.
Biofuel gasoline- UK scientists developed a modified strain of Escherichia coli. This stamp transforms glucose into biofuel gasoline which is ready for use.
Vegetable oil- Low quality oil is considered as a useful fuel. Even used vegetable oil could be transformed into biodiesel.

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