Solar energy is light energy or heat energy

Solar Energy, generally refers to the radiant energy of sunlight, which is commonly used for power generation in modern times. Since the formation of organisms from the earth, it mainly relies on the heat and light provided by the sun. Since ancient times, humans have also been able to dry objects and use them as methods for preserving food, such as salt and salted fish. However, under the reduction of fossil fuels, it is intended to further develop solar energy. The use of solar energy has two methods: passive utilization (photothermal conversion) and photoelectric conversion. Solar power is an emerging renewable energy source. Solar energy in a broad sense is a source of many energy on Earth, such as wind energy, chemical energy, and potential energy of water. In billions of years, solar energy is an inexhaustible source of energy.

Solar energy is the energy produced by the fusion of internal hydrogen atoms to release huge nuclear energy, the radiant energy from the sun. The majority of the energy required by humans in the Sinoma Solar Power System comes directly or indirectly from the sun. Plants release oxygen through photosynthesis, absorb carbon dioxide, and convert solar energy into chemical energy for storage in plants. Fossil fuels such as coal, oil, natural gas, etc. are also formed by the evolution of ancient animals and plants buried underground in the long geological period. In addition, water energy, wind energy, etc. are also converted from solar energy. The energy contained in the Earth itself usually refers to the energy associated with the heat inside the Earth and the energy associated with the nuclear reaction.

The energy associated with nuclear reactions is nuclear energy. When the structure of the nucleus changes, it can release a lot of energy, called nuclear energy, referred to as nuclear energy, commonly known as atomic energy. It comes from the nuclear fission energy resources in the fission reaction of uranium and thorium stored in the earth's crust, and the nuclear fusion energy resources in the fusion reaction of thorium, thorium and lithium stored in the ocean. These substances release energy when a nuclear reaction occurs. The biggest use of nuclear energy today is power generation. In addition, it can also be used as other types of power sources, heat sources, and the like.

Solar energy is energy generated by the fusion of internal hydrogen atoms to release huge nuclear energy, and the radiant energy from sunlight. Most of the energy required by humans comes directly or indirectly from the sun. Plants release oxygen through photosynthesis, absorb carbon dioxide, and convert solar energy into chemical energy for storage in plants.

Light energy: The form of energy corresponding to photon motion is light energy, which is a form of energy released by glowing objects such as the sun and candles.

Therefore, solar energy belongs to light energy. If you want to study the photosynthesis of plants, it is said that fixed solar energy or light energy is generally right, but solar energy is more specific and therefore more commonly used.

In principle, solar energy can be converted directly or indirectly into any form of energy, but the more conversions, the lower the efficiency of solar energy conversion.

Solar-thermal conversion

The black absorption surface absorbs solar radiation, which converts solar energy into heat energy, and its absorption performance is good, but the radiant heat loss is large, so the black absorption surface is not an ideal solar absorption surface. The selective absorption surface has a high solar absorption ratio and a low emission ratio, has good performance of absorbing solar radiation, and has small radiant heat loss, and is an ideal solar absorption surface. This absorbent surface is made of a selectively absorbing material, referred to simply as a selective coating. It was proposed in the 1940s. It reached practical requirements in 1955. After the 1970s, it developed many new selective coatings and mass-produced and popularized applications. At present, hundreds of selective coatings have been developed.

Solar energy - electrical energy conversion

Electrical energy is a high-grade energy that is convenient to use, transport, and distribute. The conversion of solar energy into electrical energy is an important technical basis for large-scale utilization of solar energy. Countries all over the world attach great importance to it, and there are many conversion routes, such as direct conversion of photoelectricity and indirect conversion of photothermal power. Here we focus on the photoelectric direct conversion device - solar cells.

In the world, silicon solar cells were reported in 1941. In 1954, monocrystalline silicon solar cells with an efficiency of 6% were developed. In 1958, solar cells were used for satellite power supply. Before the 1970s, solar cells were mainly used in space due to their low efficiency and high price. After the 1970s, extensive research on solar cell materials, structures and processes has been made, and great progress has been made in improving efficiency and reducing costs. The scale of ground applications has gradually expanded, but compared with conventional power generation, from the large-scale utilization of solar energy. The cost is still high.

At present, the highest laboratory efficiency of solar cells in the world is: 24% (4cm2) for monocrystalline silicon cells, 18.6% (4cm2) for polycrystalline silicon cells, 30.28% (AM1) for InGaP/GaAs double junction cells, and 14.5% for amorphous silicon cells. (Initial), 12.8 (stable), cadmium telluride battery 15.8%, silicon ribbon battery 14.6%, titanium dioxide organic nano battery 10.96%.

1. Solar power station.

China's largest photovoltaic power station was officially opened on July 1, 2013. A 10 megawatt solar photovoltaic system with a total generating capacity was installed on the roof of the station building. The roof has a photovoltaic area of ​​120,000 square meters, with 44,000 solar panels installed and an installed capacity of 10 megawatts. It can generate 1,005,570 kWh of electricity every year, and the electricity generated can be used for 5,000 households and more than 20,000 people. Compared with thermal power generation, it is expected to save 3,540.41 tons of standard coal, reduce 8113.36 tons of carbon dioxide emissions, 69.18 tons of sulfur dioxide emissions, 33.16 tons of dust, and save 17153.68 tons of water.

2, solar stadium

Longteng Stadium is currently the largest stadium in Taiwan and the first stadium in the world to be fully powered by solar energy. The stadium is dominated by dragons, and the 8844 solar panels on the roof of the stadium form the scales of the dragon. The total installed capacity of Longteng Stadium is 1 MW.

3, solar hospital

In 2013, the world's largest solar-powered hospital opened in Haiti! The hospital installed a total of 1,800 solar panels, and the electricity generated in the months before the hospital's operation was enough to supply the medical power needs of more than 60,000 patients. The hospital was the result of a joint effort by Partners In Health and the Department of Health under the Sea, and was sponsored by several world-renowned medical institutions. Nearly 1,000 babies have been placed in hospitals.

4, solar energy restaurant

In July 2014, a solar restaurant was officially opened in Xinyu City, Jiangxi Province. According to reports, the restaurant covers an area of ​​4,800 square meters, integrating catering, photovoltaic roof power generation, and intelligent ecological garden, which can accommodate 600 people at the same time. Polysilicon photovoltaic panels are installed on the roof of the restaurant. According to the local average sunshine time, the project can generate about 550,000 kWh per year.

5, solar toilet

Solar public toilet, are you making it? This mobile environmentally friendly public toilet is independently developed by the village collective enterprise in Houdingzhuang Village, Shuangkou Town, Beichen District, and incorporates six patent technologies. “The environmentally-friendly public toilets we designed and produced are all made of environmentally-friendly materials. We started to invest in research and development in 2012 and officially entered the market this year.” The secretary of the Party branch of Hou Dingzhuang Village said. The system of air exhaust, flushing and heating in the environmental public toilets is automatically turned on and off. The high-pressure flushing system is more water-saving. The patented foam technology in the feces box can isolate the odor and install solar power facilities on the roof to clean and protect the environment.

6, solar carport

Is the electric car running out of power? Try a solar carport. Now let's take a look at a high-end atmospheric solar carport. BMW probably thinks that its i-series models are too gorgeous and need to be equipped with exclusive garages, so they designed a special solar garage for the i-series models. In keeping with the environmental concept of electric vehicles, this solar garage uses bamboo and carbon fiber skeletons, while the top of the garage is translucent solar panels. The main sunshine is sufficient, the solar energy absorbed by the garage is enough for the i series to charge, and the extra part can even be used to supplement the home. On the other hand, the life of this garage is as long as 30 years, so it is still a long time to invest. Such a cool garage, looking at it is still very cool, but the people do not have the ability to consume.