Essay on the theme of Finding the Energy of Our Future .

One day in 2030, I was strolling along the road. I saw that both sides of the highway were full of tall trees, and the cars driving on the highway were all started with mixed fuel, unlike the previous gasoline type of cars, which required fuel and polluted the air. Factories and residents also use wind power, solar energy, and development of garbage to generate electricity.

It's all about a new way of using energy before our eyes. "Energy" is a striking word, "beating" in our eyes. What comes to mind?

You might say that the word "energy" says familiar, I don't know how to say it well. Let's say you're not familiar with it, but we have energy everywhere in our lives. Let's talk about energy!

The earth was blown up in a cosmic **, and as soon as it was blown up, it was rich in energy. Chemical fuels, solar energy, nuclear energy, hydropower, petroleum, biofuels, and many ......Having said all that, I forgot to tell you what energy is? Energy is the substance that produces energy.

There are many types of energy: primary, secondary, renewable, and non-renewable. Primary energy is energy that comes directly from nature and is not processed and converted, such energy sources are:

Fossil fuels, solar energy, nuclear energy, biofuels, hydropower, and many ......Secondary energy is an energy directly or indirectly converted from primary energy, such as electricity, gas, gasoline, biogas, hydrogen energy, ......etcRenewable energy is an energy source that is not reduced by its own transformation or human use, such as solar energy, wind energy, geothermal energy, etc., ......Non-renewable energy is energy that is reduced by its own transformation or human use, such as the following:

Fossil fuels, nuclear fuels, and so on, ......For example, the traditional energy sources that we used to live in the past are: raw coal, natural gas, gasoline, kerosene, heat, electricity, liquefied petroleum gas, diesel and so ......onThere are also many projects that use energy, such as the Three Gorges Dam and Gezhouba to use water, hydrogen fuel for rocket launches, and nuclear power for the Qinshan Nuclear Power Plant.

The massive use of energy has made us a "captive" of "oil" energy, and we are now developing new energy sources on the basis of energy conservation. Get rid of the dependence on petroleum energy, and first use wind and solar power generation to cancel the power grid. The reuse of mixed fuel to start automobiles, the development of hydrogen energy, the use of living organisms to directly convert the sun into hydrogen, the use of ocean waves to generate electricity, and the development of waste gas to develop the energy market enable us to more effectively create energy utilization and play a role in environmental protection and benefit the ecological environment.

After listening to my introduction to the comparison between the old and the new energy, do you have a better understanding of energy and are more interested in developing it? That will allow more people with lofty ideals to develop energy rationally, so that our future generations will benefit immensely.

In recent centuries, with the rapid development of the global economy and the rapid increase in energy consumption, traditional fossil fuels such as coal, oil and natural gas are in danger of being depleted, and according to experts, traditional fossil fuels can be maintained until the middle of this century at most. In addition, people do not cherish resources, and there are still many people who are ignorant of the lack of energy on the earth, and are frantically wasting fuels such as water, electricity, and coal.

Mankind has long been trying in every possible way to find new alternative energy sources from solar energy, hydropower, wind energy, and bioenergy. These energy sources are important, but experts believe they all have their own limitations. The energy flow density of solar energy is too low, and it changes greatly with day and night, rain and shine, and seasons, making it difficult to become a large-scale industrial energy source, which can only meet the needs of families and some special needs; The growth rate of hydropower cannot keep up with the growth rate of energy consumption, and has an immeasurable impact on the ecological and biological chains. The resources and utilization of wind, geothermal, and tidal energy also have their own limitations, and they will play little role in future energy development. Bioenergy is a renewable energy source that can be used on a large scale, but the rate of regeneration cannot keep up with the need for increased energy consumption.

In recent years, scientists have discovered that there is a considerable amount of helium-3 on the moon, which is no stranger to us!

Helium-3 is an isotope of helium that contains two protons and one neutron. Compared to tritium, it is a clean, efficient, and safe fuel for nuclear fusion power generation. It has a large energy for fusion reactions; The fusion reaction mainly produces high-energy protons, which will not form strong neutron radiation, which is more beneficial to environmental protection. It is not only non-radioactive, but also has no slow-emitting neutrons, no fission substances, less decay residual heat, easier maintenance and component replacement, and easier control, so it has been widely valued by the international nuclear fusion community.

We can build a base on the moon to mine minerals and send a space shuttle to deliver it.

According to experts' calculations, if the lunar rock and soil with a depth of 3 meters are excavated and processed in an area of 10 15 square kilometers, about 1 ton of helium-3 can be extracted, which is enough to ensure that a power generation set with a power of 10 million kilowatts can work for one year. For every kilogram of helium-3 burned, 19 megawatts of energy can be generated, enough to power the lighting of the city of Moscow for more than six years. Round-trip transportation with the U.S. Space Shuttle can bring back 20 tons of liquefied helium-3 at a time, which can supply the United States with electricity for a year.

China only needs about 10 tons of helium-3 per year to meet the annual energy needs. At the current level of global energy demand, 100 tons of helium-3 a year would meet the world's consumption, and these helium-3s would be enough to be transported by the space shuttle three or five times a year. According to this calculation, the helium-3 on the moon could be used by the Earth for thousands or even tens of thousands of years.

What a resource!

Maybe one day in the future, a base will really be built on the moon to continuously deliver energy to us, so let's strive for that goal!

Energy base overlook.

With the development of science and technology, the various ideas for the development and utilization of helium-3 on the moon will certainly become more and more colorful, more and more detailed and concrete, and closer and closer to the final practice. Moreover, the establishment of an energy base on the moon is not only the development and utilization of helium-3, but also the development and utilization of solar energy on the moon has a broad prospect.

The solar energy on the moon is extremely abundant, because there is no influence of the atmosphere, solar radiation can go straight into the body, and the annual solar radiation energy reaching the lunar range is as high as 12 trillion kilowatts, which is equivalent to 10,000 times the total energy generated by various energy sources consumed on the earth in a year. With the current very mature photoelectric conversion technology, it is relatively easy to carry out solar power generation on the moon, and there is no need to worry about the occupation of land, and solar panels can be laid on the moon without restrictions.

Many experts are interested in using solar power on the moon. Experts have calculated that a solar power plant with a photoelectric conversion rate of 20% can generate kilowatt-hours per hour per square meter of solar cells, and 2,700 kilowatt-hours per hour if a 1,000-square-meter battery is used. This energy can also be delivered by laser or microwave to relay satellites, and then to Earth's power receiving stations, until it reaches users around the world.

Considering that both day and night on the Moon are equivalent to 14 Earth days, solar power plants could be built in polar regions where the sun shines longer preferentially. With the development of the construction of the lunar base, the layout of solar power plants can also be comprehensively examined, some are built on the front side of the moon, and some are built on the far side of the moon to form a global parallel solar power plant, and the solar power plant and the nuclear power plant can also be networked. In this way, not only can the lunar base be used smoothly and sufficiently, but also the earth can be sent to the earth smoothly and sufficiently.

In the conceivable future, the lunar energy base composed of helium-3 mining and processing plants, nuclear power plants and solar power plants can not only bring light to the long night of the moon and bring a powerful impetus to the development and utilization of the moon, but also make immeasurable contributions to the energy replacement of the earth and refuel and increase the strength of human beings flying to Mars and other planets.

Looking at the moon in the future, it is not just an "ice wheel" for human beings to enjoy, but a powerful giant wheel that can promote the development and utilization of the entire universe!

In order to write this essay, I closed my eyes and racked my brains and meditated, and when I opened my eyes, I was already in a strange world. The air here is very fresh, and there is a fragrance that is difficult to describe in words, as if the smell of fresh air is mixed with the faint aroma of small wildflowers, which is intolerable and refreshing. The overpasses are made of skittles and make my mouth water.

The colorful car rental companies on the street are even more interesting: there are acres of oranges and lemons, there are tank-shaped, and there are transformers' ......The most surprising thing is that their cars don't emit black smoke like ours!

Just when I was at a loss, a strange robot appeared in front of me and said, "Hello, respected tourists, welcome to the world of 2046, I am your guide--- Wowo. ”

In 2046? ”

Yes, it was the Old Man of Time who sent you here. Wowo said, "Let me introduce you to you!" Previously, there were oil, coal, electricity, biomass, tidal energy, wind, solar, geothermal, nuclear ...... in the worldBecause oil and coal are non-renewable energy sources, and people don't know how to save them, this kind of energy has been consumed.

Now, scientists have replaced oil with hydrogen, so now all the cars on the streets are hydrogen-powered cars. ”

Hydrogen-powered cars? "Although hydrogen replaces oil, how does hydrogen make cars move forward?" ”

Yes, hydrogen is a new type of clean energy that is both efficient and environmentally friendly, and it is abundant in water molecules, which can be separated by electrolysis for people to use in large quantities. Now that humans have developed engines that use hydrogen as fuel, the water vapor produced by hydrogen combustion does not pollute the environment, so people can drive without using petroleum fuel. ”

Oh! I understand. ”

Fang Yu !! Don't sleep, hurry up and write your essay! Mom's voice rang in my ears.

Yes? I'm asleep! It turned out to be a dream, a beautiful dream! ”

[Essay Our Future Energy] One night, a bright light suddenly appeared outside the window and woke me up, Essay Our Future Energy. I put on my clothes and went downstairs to see an elliptical spaceship slowly descending. When I take a closer look, isn't this the Sail spaceship from the computer game I often play?

A few small Cells walked down from the Cell, how did the Sail come to Earth? I decided to go over and find out. Little Sayr said to me

Our planet has run out of energy, and we came to Earth to find new energy. I said to the little Cell: We have oil, coal, electricity, bioenergy, etc., but according to scientists, there is not much energy on the earth, and it will slowly dry up in a few decades.

Little Sayre told me: We know this, but you humans are the smartest, and in another 30 years you will find a solution to the problem. If you don't believe it, close your eyes and I'll take you to the future.

I closed my eyes, only to feel a bright light flash in front of me, I slowly opened my eyes, looked around carefully, and felt why this city was so strange. Little Sayr said to me: This is the Earth in 2039, you see what's different.

I looked at the time when the buildings on the earth were very neat, there were no telephone poles and messy wires on the road, the cars running on the road did not emit any black smoke, and the air was very fresh. Sayre told me that people on the earth today use solar energy, and the power used in cars is also burned by hydrogen produced by splitting water.

There are not many water resources on the earth, but the earthlings have found a way to purify seawater into fresh water and then decompose and reuse it, and we are here to learn this method. I jumped for joy.

This jump really woke me up, and it turned out that I had a dream. But I believe that the dream scenario will come true. As long as we pay attention to environmental protection, our earth will become more and more beautiful.

Sixth grade: Wu Haolin.