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Composition on solar energy
In daily study, work and life, everyone has been exposed to composition. According to different genres, composition can be divided into narrative, expository, practical and argumentative. There are many points for attention in composition. Are you sure you can write? The following is my composition on solar energy. Welcome to read the collection.

1, solar elevator

"Oh, the power is out again, and we have to go downstairs from the 24th floor!" Whenever I hear people complaining, I see them running down the stairs panting. I thought: I have to find a way to solve the problem of inconvenience downstairs caused by power failure. So I want to invent the solar elevator.

Unlike ordinary elevators, solar elevators have a square hole at the top of the elevator, which can absorb solar energy. Some people will ask what to do if it rains and snows. Don't worry, it has a mezzanine with an electric guard board, which will come out automatically when it rains or snows.

Above the elevator is a solar facility, which is very powerful and can generate a lot of electricity. The elevator rises through the circuit on the iron plate. In order to prevent people from getting an electric shock, the inner layer is a layer of rubber. Mirrors are installed on the four walls of the "hole" through which the elevator passes. Sunlight shines on the mirror, and through the reflection of the mirror, it is sent to solar energy to generate electricity.

Some people will ask, "What if there is no sunshine on a cloudy day?" This is the strangeness of this elevator. During the day, it absorbs sunlight all the time and makes electricity, but the electricity it consumes every time is only a part of solar power generation, and the rest is stored in the battery. When there is no sun, the elevator rises and falls with stored electricity.

Someone will definitely ask, "What's the use?" Solar energy plays a great role. First of all, it saves energy and uses nature for protection. Secondly, it can bring convenience to people. In tall buildings, lights and elevators use electricity. If there is a power failure, the building will become dark and opaque. At this time, you just came back from other places and brought a lot of things. You live upstairs. It's getting dark What should you do? At this time, the solar elevator can be awesome and help you tide over the difficulties.

Solar elevator is practical and convenient. I will study hard, master modern science and technology, and strive to realize this beautiful wish.

2. Future solar cars

Students, what is the future world in your mind? Tell you, the future world in my heart is particularly wonderful. Let me introduce you to the future solar car!

The future solar car has a shiny silver chip on it, which can absorb a lot of solar energy, and the solar car also has the ability to store energy! There is a lot of solar energy absorbed during the day, and the excess will be stored. In the dark night, this energy can still drive cars on wide roads. Whenever there is a traffic jam, as long as the round button is pressed, the car will fly into the sky like wings, fly to a place with smooth traffic, and automatically land on the ground slowly and drive quickly again. The solar car can also be turned into a wide ship, sailing freely in the blue sea, or into a submarine, diving into the deep sea, leading us to explore the mysteries hidden under the sea. To tell the truth, a compact and convenient music box is also installed on the solar car. As long as you say your favorite music, beautiful music will be played in the music box immediately, eliminating your fatigue from work or travel.

I think: As long as we work together with Qi Xin to study and create together, our dream will come true, and we will develop a solar car that will automatically slow down if the driver is drunk, and remind him that he is in a drunk driving state and advise him to stop immediately, otherwise it will be very dangerous. If he still doesn't listen, then the solar car will intelligently analyze where the driver is going and then automatically drive to the destination. When the old man gets on the bus, the car will automatically massage the old man and check his health. And it doesn't need refueling, as long as it is started in the sun, it will automatically absorb heat energy. Cold air will be released automatically in summer, and heat energy accumulated in summer will be released automatically in winter to keep people warm.

Although this kind of car has not been invented yet, I believe this kind of car will be invented in the near future, until I work hard, you work hard and we all work hard.

4. Magic solar energy

Technology takes us into the temple of knowledge, and technology takes us into the future world ... Here I will introduce a new technology-solar energy.

Solar energy, generally referring to the radiant energy of sunlight, is generally used to generate electricity in modern times. Since the formation of life on earth, it has mainly depended on the heat and light provided by the sun. Ancient people also knew how to use sunlight to dry things as a way to preserve food, such as making salt and drying salted fish. However, with the decrease of fossil fuels, solar energy is deliberately further developed. There are two ways to use solar energy: photothermal conversion and photoelectric conversion. Solar power generation is a new renewable energy. In a broad sense, solar energy is the source of a lot of energy on the earth, such as wind energy, chemical energy, potential energy of water and so on.

In the near future, I hope China will become a country that uses solar energy in all aspects. I am a citizen of * * *. The solar energy intelligent manager is installed at the top of the building where we live. When the sun comes out, it stores the energy of the sun and provides all kinds of energy for people's lives. For example, solar washing machines, solar lamps, solar fans, solar air conditioners, solar street lamps and solar cars all use solar energy, which will make people's lives more convenient and more environmentally friendly. My favorite is the solar car. Solar cars can not only gallop on the ground, but also gallop in the air. There will be running cars in the sky and underground, which will definitely make you feel extremely excited. It can make your every trip feel relaxed and happy with driverless driving!

Science and technology are omnipotent, which will make our country more prosperous and the relationship between nature and human beings more harmonious. Technology is really amazing!

5. Solar water heater

My family bought a solar water heater, which looks strange. The solar water heater looks like a blanket folded in half. It has countless steel pipes on its belly, which is really fun! But how can such a strange thing turn cold water into hot water in summer? And it does not consume electricity. Can I take a hot bath without gas? What's going on here?

It turns out that the energy that the sun shoots at the earth every minute is equivalent to the energy consumed by human beings in one year. Solar water heaters use steel tube absorbers to absorb sunlight into water tanks and turn cold water in the water tanks into hot water. So people can take a hot bath comfortably. It is really the most suitable and safest energy-saving product for people! Solar water heaters have the advantages of good thermal insulation, good frost resistance, low price and long service life. It is really a good friend of mankind! It brings a lot of convenience to our life.

With solar water heater, we can also invent many solar appliances, such as solar TV, solar electric lamp, solar refrigerator, solar electric fan, solar building … As long as we use solar energy, we can save electricity. How nice!

6. Solar water heater

The science teacher asked us to make a solar water heater.

After I got home, I began to do it. First, I found a second-hand shoe box, all painted coal black. Then, I put it on the balcony to dry. Then, I found a bottle with 200 ml of water. Put it horizontally in a dry shoe box. Then, I found a big foam, divided it into small pieces and put it around the bottle. Then, stick the bottle and the shoe box firmly with transparent plastic tape. Then insert the thermometer in the middle of the right side of the box, which is the bottle mouth. Finally, use a piece of tin foil paper the size of 8K lead drawing paper to reflect light.

The next day, I took this to school. The teacher took us to the playground to test our own solar water heater.

Several classmates and I took the solar water heater and carefully put it in a corner. We found a big classmate and asked him to reflect the sunshine with tin foil paper. Ten minutes passed, and twenty minutes passed. Everything comes to him who waits, and the temperature of the water thermometer is getting higher and higher. Finally, the teacher announced that our experiment was successful.

Look, this is our solar water heater. If you are tempted, you can make one yourself!

7. Green energy solar energy

The price of gas is rising day by day, but it is Guo Meimei who sings the song "Not Afraid" in my home, because I have installed solar energy in my home.

The solar energy in my home is a solar water heater, which is installed on the roof. Solar energy is great. We have used it for five years and think it has many advantages:

Environmental protection. Solar energy is a safe, clean and renewable green energy. What is renewable energy? Even if the sun is shining today, it will be shining tomorrow, so solar energy is an inexhaustible source of energy. Unlike coal and oil, it is gone after mining, and it is gone after cutting down trees. Moreover, it does not need to be transported, processed and refined, and can be used as long as there is sun. Solar energy is a very clean energy source, and there is no harmful gas and waste residue produced by fossil fuels such as coal and oil, so it does not pollute the environment. We use solar energy at home, and the air at home is particularly good.

Save money. As long as the sun comes out, it will boil water for us, which is very hot and can be used in spring, summer, autumn and winter. The highest water temperature in summer can reach 98 degrees, which can be used to kill chickens; Even if the sun doesn't shine in winter, it is generally more than 30 degrees. It can be used as long as the temperature of gas or electricity is increased a little. With the use of solar energy, my family burned one less can of gas a month, which is equivalent to nearly one thousand kilograms of firewood and hundreds of kilograms of coal. Saving energy means saving money. We reduce our expenses by nearly 100 yuan per month. How much can I save in five years? Students have studied mathematical multiplication, and calculate how much money they have saved me. I made a preliminary estimate and saved nearly 6000 yuan. According to my dad, it cost more than 20xx to install this solar energy, which means that the cost has already been recovered. It can be used for fifteen years.

Safe. Now schools emphasize safety, and safety is the most important thing. Both electricity and gas are prone to safety accidents. Solar energy doesn't need electricity, gas and firewood, so it won't get an electric shock, gas poisoning or fire. Don't worry about anything except being careful that the water is too hot to burn. Because solar energy is very safe, my parents trust me to use it.

Convenient. Unlike gas water heaters, solar energy is not so complicated when using water. As soon as it was opened, hot water came. Water can be supplied 24 hours a day, and the water temperature can be adjusted as needed. The water temperature can be stored for three days, and it can still be used when there is no sunlight for two or three days. Solar energy is equipped with computer control, which can automatically supply water, keep warm and heat, and the water temperature and quantity can be displayed, so it is very convenient to use.

Students, have you installed solar energy in your home? If not installed, please use solar energy as soon as possible in order to save energy resources, protect the ecological environment and ensure safety and health!

8. Future solar house

One morning, I heard cheers coming from next door. I hurried out to have a look. It turns out that next-door neighbor Nini has developed a new type of solar house.

My eyes were fixed on the outer layer of the solar house. Nini ran to my side and shook her finger: "Go in and have a look!" " "I should come and go to the solar house with her.

I groped around curiously and looked around. Suddenly I thought of a question: "The door here is open, why is the air conditioner on?" Nini giggled and said, "What about this door? We saw one side of it. Outside, there is a hidden solar camera. Inside, it shows the scene outside. If a thief comes in, it will shoot the thief. Air conditioning is actually a solar cell, and it depends on it in rainy days. Cold air is released from the small hole in the corner. "

I suddenly realized. At this time, there was a slight vibration from our residence. I stamped my feet quickly, but Nini put her finger in front of her mouth. "shh!" She took me to a room.

"Don't panic, look at me." She pressed a button on the wall, and with a bang, wings grew on both sides of the solar house. "wow. Fly! " I shouted. "The fun is yet to come." Nini smiled. She pressed a button again and "stabbed" it. Two hands grew under the solar house, and the house that had not been shaken was hung.

"Nini, you are great!" I shouted excitedly. Nini is manipulating the houses and hanging them to a safe place.

"This is just a small part of its function! Remember to read it all next time. " Nini smiled.