Green energy handwritten newspaper pictures

Green energy handwritten newspaper pictures

There is only one earth. The earth is our home, and we are all members of this big family. But our present home is being destroyed, and it is ourselves who destroy the environment. We have exchanged the destruction of the environment for the current economic development. Now we must take the protection of the environment as our own responsibility and make the earth a green earth again. The following is the information about the pictures of the green energy handwritten newspaper that I compiled for you. Welcome to read!

Green energy concept

? Green? Energy has two meanings: first, using modern technology to develop clean and pollution-free new energy sources, such as solar energy, wind energy and tidal energy; The second is to turn harm into benefit, combine it with improving the environment, and make full use of the energy contained in urban garbage, sludge and other wastes. At the same time, a large number of automatic control technologies have been popularized to continuously improve the energy utilization rate of equipment. Since 1987, the power obtained by industrialized countries from solar energy, hydropower, wind power and plant energy is equivalent to the energy of 9 million tons of standard coal, and this growth rate will increase at an average annual rate of 15% ~ 19% in this century. From1981~1991,the turnover of industrialized countries in wind and solar power generation equipment alone reached1200 million US dollars, among which the United States, Germany, Japan, Sweden, China and the Netherlands made the fastest progress.

Green energy [1] includes not only renewable energy: solar energy, wind energy, hydro energy, biomass energy, ocean energy, etc. It also includes the application of technology to turn waste into treasure: new energy sources such as straw and garbage. People often mention green energy, such as solar energy, hydrogen energy and wind energy, but another kind of green energy is the fuel provided by green plants, which is called green energy, also known as biological energy or material energy. In fact, green energy is an ancient energy. For thousands of years, human ancestors have been chopping down trees, chopping wood and cooking to keep warm. The consequence of this survival is that it has brought serious damage to the natural ecological balance. Painful historical lessons tell us that the use of bioenergy to maintain human survival and even benefit mankind must be carried out in accordance with its natural laws. We should not only make use of it, but also protect it, develop it and maintain a virtuous circle of natural ecosystem.

But in green energy, another resource is grass. According to statistics, there are 2.6 billion hectares of grassland in the world, most of which are natural grasslands. It is not only a place for grazing, but also a paradise for wildlife to live and multiply. There are also some grasslands that provide feed for livestock in winter, and few grasslands provide fuel for people's lives. Due to the improvement of farmers' living standards and the continuous improvement of electrification, the fuel structure of most farmers has undergone fundamental changes. Many farmers' friends no longer use firewood to burn kang in winter, but plug in electric blankets to keep it warm like spring. They no longer burn firewood and straw for cooking, but use honeycomb coal stoves, liquefied gas stoves and biogas. Even if straw is burned, it is a small part of remote mountainous areas or individual farmers. Moreover, a large number of straws piled up in the ground, piled up into mountains, and some even occupied farmland. Therefore, some farmers burn a lot of straw in the fields, causing environmental pollution and even affecting road traffic and aircraft take-off and landing.

What is green energy?

First, solar energy

Solar clean energy is a new type of energy that converts the light energy of the sun into other forms of heat energy, electric energy and chemical energy, and does not produce other harmful gases or solid wastes during the energy conversion process. It is environmentally friendly, safe and pollution-free.

Second, bioenergy.

Bio-energy is a form of energy in which solar energy is stored in organisms in the form of chemical energy. It is a kind of energy with biomass as the carrier, which directly or indirectly comes from photosynthesis of plants. Among all kinds of renewable energy, biomass is unique. It is the stored solar energy and the only renewable carbon source, which can be converted into conventional solid, liquid and gas fuels.

Third, hydrogen energy.

Hydrogen has good performance, many advantages and no toxicity. Compared with other fuels, hydrogen combustion is the cleanest. Except water and a small amount of hydrogen nitride, it will not produce pollutants harmful to the environment, such as carbon monoxide, carbon dioxide, hydrocarbons, lead compounds and dust particles. A small amount of hydrogen nitride will not pollute the environment after proper treatment, and the water produced by combustion can continue to produce hydrogen and be recycled.

Fourth, wind energy.

There are two main forms of wind energy utilization: wind power generation and wind power generation, of which wind power generation is the main one. Taking wind energy as power means using wind to directly drive various mechanical devices, such as a wind engine that drives a water pump to lift water. With global warming and energy crisis, countries are stepping up the development and utilization of wind power generation, trying to reduce the emissions of greenhouse gases such as carbon dioxide and protect the earth on which we live.

Verb (abbreviation for verb) ocean energy

Ocean energy refers to renewable energy attached to seawater. The ocean receives, stores and releases energy through various physical processes, which exist in the ocean in the form of tides, waves, temperature differences, salinity gradients and ocean currents.

Sixth, geothermal energy.

Geothermal energy is natural heat energy extracted from the earth's crust. This energy comes from the lava inside the earth and exists in the form of heat. This energy is the energy that causes volcanic eruptions and earthquakes. Nowadays, in order to improve the utilization rate of geothermal energy, many countries adopt the methods of cascade development and comprehensive utilization, such as cogeneration, cogeneration, heating first and then breeding.

Seven, water energy

Water energy is a kind of renewable energy and clean energy, which refers to the kinetic energy, potential energy, pressure energy and other energy sources of water bodies. With the decrease of fossil fuels, water energy is a very important and promising alternative resource. At present, hydropower generation in the world is still in its infancy. Rivers, tides, waves and swells can all be used to generate electricity.

Application of Green Energy

Solar energy/solar energy

The sun is a huge, ancient and endless energy source, and it is also the source of many energy sources. Although the energy radiated by the sun to the earth's atmosphere is only its total radiation energy (about? 3.75? 1026W), but it has reached 173000 tw, which means that the energy that the sun shines on the earth every second is equivalent to 5 million tons of coal. Wind energy, water energy, ocean temperature difference energy, wave energy, biomass energy and some tidal energy on the earth all come from the sun; Even the fossil fuels on the earth (such as coal, oil, natural gas, etc. ) are basically solar energy stored since ancient times, so the broad sense of solar energy covers a very large range, while the narrow sense of solar energy is limited to the direct conversion of solar radiation into photothermal, photoelectric and photochemical energy. Solar energy is both primary energy and renewable energy. It is rich in resources, can be used for free, does not need transportation, and has no pollution to the environment. But solar energy also has two main disadvantages: first, the energy flow density is low; Second, its intensity cannot be kept constant due to various factors (season, place, climate, etc.). These two shortcomings greatly limit the effective use of solar energy.

Geothermal energy

Geothermal energy is renewable heat energy from the depths of the earth, which comes from the decay of molten magma and radioactive materials on the earth. Its utilization can be divided into two categories: geothermal power generation and direct utilization. The reserves of geothermal energy are many times more than the total amount used by people at present, and they are concentrated at the edge of tectonic plates, which is also a volcano and earthquake-prone area. Geothermal energy is renewable if the speed of heat absorption does not exceed the speed of replenishment. Geothermal energy is widely used in many parts of the world. It is estimated that the heat energy transmitted from the earth's interior to the ground every year is equivalent to 100PW? H. However, the distribution of geothermal energy is scattered, which makes the development difficult.

wind energy

Wind is a natural phenomenon on the earth, which is caused by solar radiation heat. When the sun shines on the earth's surface, different parts of the earth's surface are heated, resulting in temperature difference, causing atmospheric convection and forming wind. It is estimated that although only about 2% of solar energy reaching the earth is converted into wind energy, its total amount is still considerable. The global wind energy is about 2.74X 109MW, of which the available wind energy is 2X 107MW, which is 10 times larger than the total amount of water energy that can be developed and utilized on the earth.

Wind energy is a kind of pollution-free renewable energy, which has great development potential, especially for coastal islands, remote mountainous areas, sparsely populated grassland pastures and rural and border areas that are far from power grids and difficult to reach in the near future. As a reliable way to solve the production and living energy, it is of great significance. Even in developed countries, more and more attention has been paid to efficient and clean wind energy.

ocean energy

The ocean not only provides shipping, water and rich mineral deposits for human beings, but also contains huge energy. It stores solar energy and derived wind energy in the form of thermal energy and mechanical energy in seawater, which is not as easy to be lost as in land and air.

Ocean energy refers to renewable energy attached to seawater. The ocean receives, stores and releases energy through various physical processes. These energies exist in the ocean in the form of tides, waves, temperature differences, salinity gradients and ocean currents, which are described as follows:

Tide and tidal current energy comes from the gravity of the moon and the sun, and other ocean energy comes from solar radiation. The ocean area accounts for 765,438+0% of the total area of the earth. Most of the energy that the sun reaches the earth falls on the ocean and seawater, and some of it is converted into various forms of ocean energy.

The temperature difference energy of seawater is heat energy. At low latitudes, the sea surface temperature is high, and there is a temperature difference with the deep cold water, but it stores the thermal energy of temperature difference, and its energy is proportional to the temperature difference and water quantity.

Tides, tidal currents, ocean currents and wave energy are all mechanical energy. Tidal energy is the energy generated by the earth's rotation, which is transmitted to the ocean through the gravitational action of the sun and the moon and stored in the form of long-period waves. Tidal energy is proportional to tidal range and tidal volume. The energy of tidal current and ocean current is proportional to the sum of squares of velocity and flux; Wave energy is mechanical energy generated by wind, which is stored by short-period waves in the form of potential energy and kinetic energy. Wave energy is proportional to the square of wave height and the fluctuating water area.

The salinity difference energy of seawater in estuary is chemical energy, and there is salinity difference between fresh water and seawater flowing into the sea. If separated by a semi-permeable membrane, fresh water permeates to the seawater side to produce osmotic pressure, and its energy is proportional to the pressure difference and osmotic flow. Therefore, there are great differences in the physical process development technology and the degree of development and utilization involved in various energy sources.

mesenchymoma

Biomass refers to all kinds of organisms produced by photosynthesis. Bio-energy is a form of energy in which solar energy is stored in organisms in the form of chemical energy. It is a kind of energy based on biomass, which directly or indirectly comes from photosynthesis of plants. Among all kinds of renewable energy, biomass is unique. It is the stored solar energy and the only renewable carbon source, which can be converted into conventional solid, liquid and gas fuels.

It is estimated that the annual fixed carbon in photosynthesis of plants on the earth is 2x 101t, and the energy content is 3x 102 1J, so the solar energy stored in branches, stems and leaves by plants through photosynthesis is equivalent to/kloc-of the global annual energy consumption. Bio-energy is the fourth largest energy source, and biomass is spread all over the world with huge reserves. Biomass resources in the world are huge and varied, including firewood, agricultural and forestry crops, especially energy crops planted for energy production, agricultural and forestry residues, leftovers from food processing and forest and agricultural products processing, municipal solid waste, domestic sewage and aquatic plants.

magnetic energy

Generally, it refers to energy related to magnetism, and strictly speaking, it should refer to magnetic field energy. To establish a current in a coil, it is necessary to do work on the self-induced electromotive force of the coil, and the energy related to this work is called self-induced magnetic energy. There is mutual inductance between the two coils. When a current is established in two coils, it will not only do work on the self-induced electromotive force of the coil, but also do work on the mutual inductive electromotive force of the coil. The energy associated with the latter is called mutual inductance magnetic energy.

In the case of magnetostatics, current and magnetic field always coexist. Therefore, whether magnetic energy is associated with current or stored in a magnetic field, the effect is exactly the same. But scientific practice has proved that magnetic field is a special form of matter, and it can exist without current. A changing electric field can also produce a magnetic field. The magnetic field generated by this changing electric field is also energetic, and its field energy density is the same as magnetostatics. Generally speaking, the changing electromagnetic field propagates in the form of waves, accompanied by energy transfer.

hydrogen energy

Hydrogen energy is a kind of secondary energy, because it is made from other energy sources in a certain way, unlike coal, oil and natural gas, which can be directly mined from underground. This kind of energy will be exhausted one day. If hydrogen energy can be produced from it, it is expected to solve the alarm of energy crisis.

In nature, hydrogen combines with oxygen to form water, and hydrogen must be separated from water by thermal decomposition or electrolysis. Fuel cells directly generate electricity and water through the electrochemical reaction of hydrogen and oxygen, which can complete power generation in one step and is more efficient than traditional methods. After commercialization, this power generation system is not only suitable for ordinary families, but also the hot water produced by its by-products is about 40 to 60 degrees Celsius, which is quite suitable for family bathing and kitchen use, killing two birds with one stone.

It is obviously not feasible to use the heat generated by the combustion of coal, oil and natural gas or the converted electricity to decompose water to produce hydrogen. Now it seems that the basic way to produce hydrogen efficiently is to use solar energy. If we can use solar energy to produce hydrogen, it is equivalent to converting endless and scattered solar energy into highly concentrated clean energy, which is of great significance.

heat pump

Working medium is a kind of working medium which converts low-grade heat energy into high-grade heat energy after being absorbed by compressor, and it often exists in these five basic forms in compressor. It is also the basis of thermodynamic research.

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