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Scientific knowledge about electricity


The electricity is used to generate electricity through the power plant and enter the substation to increase the voltage , So that the electric energy can be sent farther, the line is transmitted to the distant place through the transmission tower.

Then the voltage is reduced through the substation for use in factories and large shopping malls, and then the voltage is reduced even lower through the transformer for home use.

How fast is the electricity?

Power transmission is the “sixth mode of transportation” after road, railway, waterway, air and pipeline transportation.

The electric field is transmitted at the speed of light of 300,000 kilometers per second, and power generation, transmission, distribution, and use of electricity are completed at the same time. In order to reliably supply power, optimize resources, and reduce electricity costs, we connect transmission lines into a large power grid for people to use.

The propagation speed of the electric field can circle the earth almost 8 times per second.

Why do we need to transform?

People can store water in a tank, but electricity cannot be stored. It must be manufactured in an instant and transported through wires.

In order to allow the current to travel farther, it is necessary to increase the voltage of the electricity. After the current flows out of the booster substation, it enters the high-voltage line.

The high-voltage lines are far away from the ground and are erected on huge iron towers to send electricity from the power station to various places.

What are the energy sources that can be generated?

The energy that can be generated is mainly divided into traditional energy and renewable energy.

My country is currently mainly relying on traditional energy sources for power generation. Traditional energy sources include coal, oil, natural gas, etc.; renewable energy sources include nuclear energy, hydropower, geothermal energy, solar energy, and wind energy.

What is “power transmission from west to east”?

The western region of my country is rich in water resources and lacks development; the eastern region has a developed economy and lacks energy. Through the energy development strategy of “power transmission from the west to the east”, the development of hydropower and thermal power in the west and transmission to the eastern regions where power is scarce has not only provided a new historical opportunity for western provinces and regions to transform their advantages in power resources into economic advantages, but also alleviated them. The current situation of power shortage in the east has promoted the optimal allocation of a wide range of resources to achieve the best use of limited resources.

Why do we need to patrol?

Line workers patrol the power tower to check whether the equipment is intact. If any damage is found, report to the higher-level department for emergency repairs so as not to delay the normal transmission of power. Because some lines have to cross mountains and rivers, or between lofty mountains, the line inspection work is very difficult.

After the UHV line inspector boarded the high-voltage line, the distance between the cable under his feet and the ground was 12 meters and the highest was 800 meters. Psychological quality and physical ability must be absolutely excellent.

What to do if the transmission line encounters ice and snow disasters?

Snowstorms will cause ice to form on the power lines, and some towers collapse to the ground because they cannot bear the gravity of the ice and snow. Now the newly developed DC ice melting device is installed on the icing line, and the ice and snow can be melted little by little.

Is there radiation from high-voltage lines?

Many people wonder whether the electromagnetic environment around power transmission and transformation facilities is safe. In fact, the power frequency of power transmission and transformation facilities in our country is 50 Hz. Only the power with a frequency of more than 3000 Hz will spread and form radiation in the form of electromagnetic waves. Therefore, there is no need to worry about the impact of substations or high-voltage power lines on health and safety.

What does 1 kWh of electricity do?

One kilowatt-hour of electricity that can run the most: The coolest 1 kilowatt-hour of electricity for an electric bicycle to run about 80 kilometers: ordinary electric fans run for about 15 hours, the cleanest 1 kilowatt-hour of electricity: 9 watts of energy-saving lamps are on for more than 100 hours, the most entertaining 1 kilowatt-hour of electricity: Watching TV for about 10 hours, the most thirst-quenching 1 kWh: boiling about 8 liters of water, the most heat-reducing 1 kWh: producing about 15 bottles of beer, the most warmth 1 kWh: weaving about 10 meters.

If each person saves 1 kWh per day What is the effect of electricity?

With a population of 1.33 billion in my country, it can save 1.33 billion kilowatt-hours of electricity a year. Assuming that 1 kilowatt-hour of electricity is 0.61 yuan, then 13.3*365 = 485.45 billion kilowatt-hours; 4854.5*0.61 ≈ 296.12 billion yuan. Taking Guangzhou’s annual electricity consumption of 63.751 billion kWh, 4854.5÷637.51 ≈ 7.6 years, the electricity saved in one year is enough for Guangzhou to use 7.6 years.

It takes 0.3 kilograms of standard coal to generate 1 kilowatt-hour of electricity, which will produce 0.8 kilograms of carbon dioxide. According to the above algorithm: 4854.5*0.8 = 388.36 billion kilograms = 38836 million tons, which can reduce carbon dioxide emissions by 38836 million tons.

Environmental protection knowledge


Environmental Protection Knowledge

Environmental Protection Knowledge is a process that enables individuals to explore environmental issues, engage in problem solving, and take action to improve the environment. As a result, individuals will have a deeper understanding of environmental issues and the skills to make informed and responsible decisions.

Environmental Protection Knowledge does not advocate any particular point of view or course of action. Rather, environmental education teaches individuals how to evaluate different aspects of problems through critical thinking and improves their problem-solving and decision-making skills.

Turn off the faucet when washing your hands and wiping soap.

Do not open the faucet and use long running water to wash dishes and clothes. If you see a leaking faucet, you must tighten it.

Use secondary water as much as possible.

The water used for washing rice or vegetables can be used to water flowers; the water after washing the face and washing can be left to wipe the floor and flush the toilet.

Put a Coke bottle in the toilet tank

If your flushing toilet has a large capacity, you can put a Coke bottle full of water in the water tank. This small action of yours can save 1.25 liters of water each time.

Use less detergent

Most detergents are chemical products, which will pollute water sources. If you are too greasy when washing the dishes, you can pour out the remaining greasy first, and then wash it with hot noodle soup or hot soapy water, so that too much oil will not be discharged into the waterway. Kitchen utensils with heavy oil stains can also be cleaned with soda-heated water.

Don’t let the TV stay in the standby state for a long time

The standby state means that only the remote control is used to turn it off, but the power is not completely cut off. The power consumption of each color TV in standby state is about 1.2 watts/hour.

Cooking rice with warm water

Cooking rice with warm water can save electricity by 30%. The inner pot and electric heating plate of the rice cooker should be cleaned in time.

Unplug the rice cooker as soon as it is used up, which saves electricity and prolongs its service life.

Buying Green Foods

Many vegetables and fruits have been sprayed with pesticides and fertilizers, and many foods have used additives. Such food can endanger health and intelligence.

Therefore, buy fresh fruits and vegetables that are free of pesticides and fertilizers, and eat less convenient fast foods containing preservatives, beverages with pigments, and crispy snacks with additives. Or look for the “green food” logo to buy food.

Choose non-phosphorus washing powder

Phosphorus-containing washing powder will cause algae in the water to grow wildly, the oxygen content in the water will decrease, and the aquatic organisms will die due to lack of oxygen. As a result, the water body becomes stagnant water and smelly water.

Buying Rechargeable Batteries

The batteries we use every day rely on chemical effects, and in layman’s terms, they rely on corrosion to generate electricity. When it is discarded in nature, these substances will slowly overflow from the battery, enter the soil or water source, and then enter the human food chain through crops.

After saving up to 30 kilograms of used dry batteries, you can contact the local garbage collection center for recycling.

Refusing to over-package many commodities

The packaging costs have accounted for 30% to 50% of the cost. Excessive packaging has increased the economic burden of consumers, increased the amount of garbage, and polluted the environment.

Bring your own food baskets

When shopping for food, take less plastic shopping bags, and bring cloth bags or food baskets when you go shopping on the street.

Use less disposable tableware when eating out

Bring your own chopsticks and spoons. Use fast food boxes, paper cups, paper plates, etc. sparingly, especially using quick chopsticks once.

Disposable chopsticks were invented by the Japanese. Japan’s forest coverage rate is as high as 65%, but their disposable chopsticks are all imported. my country’s forest coverage rate is less than 14%, but it is a large exporter of disposable chopsticks.

Make full use of white paper and try to use recycled paper

The used paper can be turned over to make draft paper or note paper. Refusing to accept publicity materials that are distributed everywhere. Making these publicity materials wastes a lot of paper and destroys the appearance and hygiene of the city by distributing and posting them everywhere.

Recycled paper is produced from recycled waste paper. One ton of waste paper = 800 kilograms of recycled paper = 17 big trees.

The use of recycled paper has become fashionable in many countries, and people are honored to show the phrase “made with recycled paper” to show their environmental awareness and civilized education. Sorting recycling, regaining the old traditional “recycling” of waste recycling is no stranger to us.

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