Besides solar street lights, where else is solar energy used?
China as the largest developing country in the world, the economic high speed development, the growth rate of energy consumption is in the first place in the world, to adapt to this development, in the present situation, the traditional way of production of energy supply and demand will have the great gap, to make up.
China as the largest developing country in the world, the economic high speed development, the growth rate of energy consumption is in the first place in the world, to adapt to this development, in the present situation, the traditional way of production of energy supply and demand will have the great gap, to make up. To get to this canal, we have to find new sources of energy. For example, the endless and inexhaustible solar energy, as a kind of renewable resources, has many application fields, such as common solar water heater, solar street lamp, one belongs to the use of light and heat, the other belongs to the use of electricity. Let's take a look at the two main application fields of solar energy in detail.
First, light and heat utilization
Its basic principle is the solar radiation cell phone up, through the interaction with the material turn mixed into heat energy and to be used, its basic configuration often have collector, can gather scattered solar radiation to a point or a line, there are generally trough, fall and it is three.
Among them, the trough technology is the most mature, the most widely used, but the temperature can only wait until about 300°C, butterfly temperature can reach a very high, but the technical aspects are not as good as the trough, and the disadvantages of the tower is probably that the floor area is large, in many aspects of the application will be limited.
In general, solar energy is used directly, but it can also be stored in a heat accumulator, so that it can be used on nights when the solar energy is not working reliably or at night. Solar water heater is the most common scene of solar thermal conversion. Other applications include solar rectifier, solar heating, solar greenhouse, solar stove and so on.
Two, power generation utilization
It can be used in two ways, one is the conversion of light to heat to electricity, and the other is the conversion of light to electricity directly.
1) Light-heat to electricity conversion
This kind of general use of large-scale array parabolic or dish mirror, such as some heat collection device to phone the solar heat, and then through the heat transfer device into the steam of the working medium, combined with the traditional turbogenerator process, to achieve the purpose of power generation, the front process for the photothermal conversion, the latter is hot spot conversion, the United States has several large thermal power generation, but in China, this conversion mode is still Relatively few.
2) Photoelectric conversion
In simple terms, it's the process of converting solar radiation directly into electricity using light volts, The basic device is solar cells. Photovoltaic power generation is a simple, low-risk technology that can be installed almost anywhere there is light. Solar street lamps can also bring light at night to many remote areas where electricity is not fully equipped.
In this photoelectric conversion process, there will be no noise and waste gas, waste, and there will be no pollution. While bringing more convenience to our life, it is also more environmentally friendly, and the photovoltaic system can also reduce the heat exchange between the building and the outside environment, and increase ventilation. Generally speaking, there are more advantages.
In addition to solar street lamps, they are also widely used in solar insect killing lamps, solar portable systems, solar mobile power sources, solar buildings and other fields.