Electrical Generation by Solar Energy

Electrical Generation by Solar Energy


There are only two ways to use solar energy to generate electricity. One is to use solar energy to heat the liquid and turn it into high-pressure steam. The high-pressure steam is sprayed into the turbine through the pipeline. The turbines are staggered layer by layer to increase the resistance and torque drive and connect the generator rotor to the turbine. The rotor automatically builds up as a rotating electromagnet after rotating, cuts the generator stator coil, and induces three-phase alternating current in the generator stator coil. The other is to use solar cells to generate electricity directly. Scientific researchers have used a power generation tower to generate electricity. The principle is very simple, that is, it is composed of many mirrors. The feet of the mirrors are installed on the intelligent servo rotating device, so that the mirror rotates with the sun, reflecting the sunlight to a central receiver on a high tower.
 
It is reported that in San Hilario-Navi, Italy, 270 mirrors with a diameter of 90 cm were built, which can generate hot steam at 500°C. Aiden and Menard are American solar pioneers. They proposed another solar power plant. Use rows of parabolic reflectors to concentrate solar radiation on pipes with dissolved salt heat, and then use a pump to pump the heated fluid from the insulated pipes to the central power station. This kind of solar power plant can only be effective if it is sunny, and it is generally suitable for deserts. Power towers and solar farms have a common disadvantage, that is, working during the daytime and resting at night.
 
Many scientists keen to develop electrical generation by solar power are most interested in generating electricity directly from solar cells. It is reported that in 1954, the Bell Telephone Company in the United States made the first batch of practical devices. They found that placing a thinner silicon wafer soaked in boron under a very thin silicon wafer could convert sunlight directly into electricity. Light shining on the upper layer causes electrons to migrate to the lower layer, which creates a voltage difference between the two layers. However, it is very expensive to change silicon into monocrystalline silicon. However, in some special cases, even if the cost is high, it is still cost-effective due to the convenience. The spacecraft is powered by solar cells. They are set at both sides of the spacecraft warehouse, like wings, and are commonly used by automated weather stations.
 
It is reported that in 1968, American engineer Gresser proposed an ambitious solar power generation plan: installing a huge solar cell module on a synchronous orbit 37,000 kilometers above the equator. Solar cells can absorb 1.5 times more solar energy than on the ground. This is a great idea for a space power station. Solar cells have many advantages, such as no moving parts, long service life, extremely low maintenance costs, and environmental protection. At present, solar cells are widely used in countries around the world to generate electricity directly.
 
Topper has been committed to the research and development of new technologies and products of solar energy. We provide polycrystalline solar panels and monocrystalline solar panels for your solar panel projects.