Solar energy is the nature available source of energy; it is continuous providing by the Sun. It is the most important of non-conventional sources of energy therefore it is one of the non-polluting energy and helps in less the greenhouse effect.
The method as solar panels absorb energy from sun to gain heat for water heating. Similarly as we use the energy of the sun to dry our clothes. Such systems are readily available in the market and are being used in worldwide factories and homes.
Solar water heaters are cost competitive in many applications when it take into account the total energy costs over the life of system. Although the initial cost of solar water heaters is higher than that of conventional water heaters. However, the fuel (i.e. sun) is safe, free and environmental friendly. To take advantage of these heaters, it must have an unshaded, south-facing location (e.g. roof or south-facing windows for externally mounted solar panels on building facade).
In this coursework, different types of solar water heaters will be introduced, including application on different types of systems available with their economic and environmental benefits.
Solar energy is the most nature inexhaustible renewable energy. To the world’s energy resources perspective, we have relied heavily on traditional energy stocks are already very limited storage capacity of the remaining oil can be used only forty-three years; natural gas storage capacity of the remainder can only be used Liushiernian Coal is the 200 ã„ thirteen years, these stocks will be growing as people increasingly exhausted to do extraction. In addition, carbon dioxide emissions from conventional energy sources is the phenomenon of global warming caused by ã„ major reason. China’s response to the global Framework Convention on Climate Change’s international responsibilities, set de 2020 renewable energy will estimate the total generating capacity of 12% of the long-term goal, and actively promote the development and application of renewable energy, reducing the use of traditional fossil fuels and to play a accessibility of renewable energy, while promoting domestic energy diversification and the main nature.
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In the vast universe, and human relying on a star is to shine a recent four-color sun. The sun, it was a huge light and heat, all things on earth to bring vitality, it wasted no time in sending to the space with a lot of energy. It has been calculated, only issued for every wonderful energy, by about the equivalent of 1.3 quadrillion tons of coal combustion is emitted by all the heat.
The sun sends to Earth’s energy is considerable, but only to its 22 billionth of outward radiation of energy, just from these energies, if the surface of the Earth’s atmosphere to remove the reflection and absorption of energy, it will really reach the Earth the surface of solar energy, approximately equal to the world’s current generation capacity of 20 million times. Solar energy received on Earth every day, equivalent to the entire world for one year the total energy consumed by 200 times. Only from these figures we can see a huge, really worthy of the sun’s energy is an inexhaustible treasure house of mankind.
On the other hand, the earth’s variety of energy sources, including chemical energy, wind energy, ocean energy, thermal energy and nuclear energy are all descendants of solar energy, solar energy conversion made. Because photovoltaic clean noise-free and changing, as many renewable energy sources and development of the most characteristic items of energy.
In building the use of renewable energy technologies are being widely studied and applied them. Renewable energy is a natural? Health and inexhaustible source of energy, which include (but are not limited to) solar, wind, tidal energy, wave energy, geothermal energy, hydropower and bio-energies. Each type of renewable energy has its own unique features, only the full understanding of these characteristics, we can effectively in our buildings in respect of use of these energy sources.
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Solar and wind are the most common renewable energy sources. Compared with other renewable energy sources, they are more likely to be collected and used in the building. Currently we collected solar energy can be grouped into three kinds of purposes: power generation, heating / cooling, and chemical processes. The first two applications have been applied in Hong Kong, and they are also among the most popular in building the application method, application examples include: the use of passive solar design to warming the room; the use of solar water heating system can heat water; use of solar PV systems can generate electricity and the joint power company’s electricity supply systems that supply the building. The wind can be? Buildings to provide natural ventilation, or to generate electricity. These application methods are not on the environment pollution.
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