The solar panel is covered with small squares containing semiconductor devices capable of converting light into electricity. The power of each block is certain. Multiple blocks of the same specification (usually different voltage specifications) are connected in parallel to step up. energy consumption. Therefore, if the board is large, has many components, and the illumination area is large, the output electrical power will be large. Common calculators have a dark red window, where the semiconductor photoelectric conversion device is installed, but the voltage is low and the current is small.
Advantages and disadvantages of rooftop solar panels
When solar panels are illuminated by light, they can convert light energy into electrical energy, causing current to flow 'one side to the other. Solar panels aredesigned on the basis of this principle. As long as the solar panel is illuminated by sunlight or light, it can generally emit electricity equivalent to 1/10 of the light energy received. In order to minimize light reflection and convert light energy into electrical energy, a solar panel is usually covered with a film to prevent light reflection, making the surface of the solar panel purple. Not so long ago, scientists managed to develop an efficient solar panel. It not only provides electricity during the day, but also electricity at night!
What is the principle of the flat solar collector?
The advantages and disadvantages of rooftop solar panels are:
1 Advantages.
1. Solar energy resources can be used efficiently to generate electricity and electricity pcould have been saved. Currently, the state provides certain subsidies for the installation of electricity generation panels. Solar power generation can allow us to use less electricity and save on our families' electricity bills.
2. Installing solar panels on the roof is relatively simple, generally speaking, it can be installed by a few workers in half a day.
2. Disadvantages
1. The investment in installing solar panels is relatively large. For some families, installation fees may be considered and will not be accepted.
2. This type of solar power generation panel is installed directly on the roof if exposed to wind and sun for a long time, corrosion problems may occur.
3. After all, solar panels are obtained from solar energy, they do notcan therefore only be used on sunny days. However, if it is cloudy or the sunshine is not particularly sufficient, power consumption will be affected. .
4. During installation, holes must be drilled on the roof to penetrate the roof. If the subsequent installation is unreasonable, the roof will leak.
The principle of solar panels
A solar cell is a device that responds to light and can convert light energy into electricity, producing an effect photovoltaic. many kinds of materials, such as: monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide, copper selenium indium, etc. Their principles of energy production are basically the same. Now crystalline silicon is used as an example to describe the photovoltaic power production process. P-type crystalline silicon is doped with phosphore to obtain N-type silicon, forming a PN junction.
When light irradiates the surface of the solar cell, some photons are absorbed by the silicon material. The material absorbs; the energy of the photon is transferred to the silicon atom, causing the electrons to transition and become free electrons which accumulate on both sides of the PN junction to form a potential difference. When an external circuit is connected, under the action of this voltage, a current will flow through the external circuit to produce a certain output power. The essence of this process is the process of converting photon energy into electrical energy.
The flat plate solar collector is a device that uses energy from solar radiation for hot water supply.
The operating principle is mainly based on the following steps:
1. Absorb solar radiation: LFlat solar collectors generally consist of one or more black heat-absorbing plates. Absorbs short-wave radiation from sunlight and converts it into thermal energy
2. Converts to thermal energy: After absorbing solar radiation, the heat absorbing plate will heat up quickly and heat the air or other heat transfer media. on its surface (like water or oil).
3. Heat transfer: The heated heat transfer fluid circulates inside the collector, transferring heat from the heat absorbing plate to the water storage tank, causing the water temperature to increase.
4. Storage and use: Heated water is stored in a water storage tank with good thermal insulation performance for domestic or commercial use.
Thanks to their high efficiency, stability and environmental protection, solar collectorsFlat plate ires have become one of the most widely used solar water heating systems. Through scientific and reasonable design and installation, users can enjoy sufficient hot water supply in various climatic conditions.