The air conditioning refrigeration is the most power -on to 26 degrees Celsius?These rumors should cool down

Just in August, the heat was difficult. Many people were tortured by high temperatures and miserable. However, the hot sun has not affected the activity of the rumors. They are still doing waves on the Internet: air -conditioning refrigeration to 26 degrees Celsius is the most power -saving, this year is the coolest year in the next ten years, cooling and spraying hazards ...

With the end of this year, there is also a hint of autumn in all parts of the country. Today, the reporter of the Science and Technology Daily counted the rumors in August one by one to let the autumn wind give them "heat".

The air conditioning refrigeration is the most power -on to 26 degrees Celsius?

Truth: The higher the temperature set, the smaller the power consumption

In the past month, high temperature weather that lasts for many days has made air conditioners a "life -saving artifact" for many people. However, while many people blow the air conditioner, they are also distressed by the electricity costs flowing away. Many people have tried on the Internet that "air conditioning to 26 degrees Celsius", and this "recipe" for power saving has tried.

In this regard, Zheng Zhongyuan, the head of the environmental protection professional of the State Grid Tianjin Institute of Electric, said in an interview with a reporter from the Science and Technology Daily that the statement of setting the air conditioner at 26 degrees Celsius is not based on it, and the power consumption of air conditioners is affected by many factors.

First, the power consumption is related to the temperature setting of the air conditioner. Someone has calculated that if the air conditioning refrigeration temperature drops from 26 degrees Celsius to 25 degrees Celsius, the power consumption will increase by 47.89%; if the temperature set by the air conditioner decreases from 27 degrees Celsius to 25 degrees Celsius, then the power consumption will increase by 134.35%. Therefore, the power consumption will decrease only by raising the cooling temperature of the air conditioner. "In other words, the lower the temperature set by the air conditioner, the greater the power consumption." Zheng Zhongyuan said.

Secondly, the power consumption of different numbers and energy efficiency is different. The first -level energy -efficient air conditioner saves power than the third -level energy -efficient air conditioner; the higher the air conditioner, the faster the cooling, but the greater the power consumption.

Finally, the power consumption consumption of air conditioners is also related to the outdoor temperature. If the temperature difference between indoor and outdoor is too large, it will also increase a certain amount of power consumption. When the indoor temperature and outdoor temperature difference is about 4 degrees Celsius, the air conditioner saves power.

Zheng Zhongyuan introduced two tips for power -saving electricity. "The air conditioning blade is adjusted to the upward blowing. Because the cold air is heavy, it will sink, so it is easier to spread the coolness than blowing the cold wind directly on the ground. In addition, it can be used with an electric fan while turning on the air conditioner. Diversify the cold wind to all corners of the room. "Zheng Zhongyuan said that both of these methods can quickly reduce the indoor temperature to the set temperature, reduce the operation of air conditioning, and save power.

This year is the coolest year in the next ten years?

Truth: Thesis research content does not involve future temperature predictions

This summer, the topic of high temperatures has not been broken, and the highest temperature record has been broken again and again, which makes people "unbearable." A hot search that appeared at the end of August "this year may be the coolest year in the next 10 years", which is even more frightened by netizens. According to the media, the relevant news said that the conclusion was a paper published in the Institute of Atmospheric Physics of the Chinese Academy of Sciences in "Nature · Communication". The paper states that in the future, the Northwest Pacific subtly high -pressure high pressure will be further enhanced, which will further lead to the emergence of extreme weather.

Subsequently, the Institute of Atmospheric Physics of the Chinese Academy of Sciences "personally ended" rumors: The paper studies the relationship between greenhouse gases and climate change. The conclusion of the coolest year ".

"To estimate the long -term climate change at the end of this century, we must use the climate model, but due to the level of science and technology development, the current model results still have uncertainty." The Institute of Atmospheric Physics of the Chinese Academy of Sciences posted a post.

Although there is no "the coolest year in the next 10 years", the heat this summer is real. According to the monitoring and evaluation of the National Climate Center, the average intensity, impact range and duration of the high temperature heat wave incident are comprehensively considered. As of August 15, the high temperature incident in my country has lasted for 64 days, the longest duration since 1961; 40 degrees Celsius degree The above high temperature weather coverage is the largest in history.

The reason why this extreme situation occurred was that Zhang Renhe, an academician of the Chinese Academy of Sciences and Vice President of Fudan University, explained that the "Arctic Warm and magnifying effect" was an important reason for intensifying the extreme weather in Eurasia and North America.

In addition, Li Xichen, a researcher at the Institute of Atmospheric Physics of the Chinese Academy of Sciences, said in an interview with the media that a direct inducement that caused extreme high temperature in summer is the global temperature increase caused by radiation forced changes caused by greenhouse gas emissions. Greenhouse gases such as carbon dioxide and methane discharged by human activities can absorb and launch infrared rays, causing the surface to continue to temperature and global warming.

During the cooling spray zero hazard?

Truth: There are hidden dangers of explosion or cause of fire

"Out 5 minutes and sweat for 2 hours" -This is a true portrayal of people who go out this year. Not only people are baked by the scorching sun. The car was exposed to the hot sun for a while, and the carriage was like a steamer, which made the driver and passengers unbearable. In order to alleviate the high temperature, many drivers purchased the cooling spray online, and some buyers said that spraying it in the car could "cool down and zero hazards." So, is it really a safe "cooling artifact"?

"The reason why the cooling spray has such a" magical 'cooling effect is the principle of evaporating the heat in the water fog. "Zhang Sheng, a professor at the School of Chemical Engineering of Tianjin University, introduced in an interview with the Science and Technology Daily reporter that the cooling spray sold online, The main component is water, and a small amount of ethanol (alcohol), mint and other organic substances are added. Because water and alcohol will "adsorb" the surface of the object, the calories are taken away after evaporation. "This is the same as that after applying alcohol on the skin before the injection, it is the same truth." Zhang Sheng said. In addition, there are some sprays that can quickly cool down from liquefied petroleum gas, and their main components are propane and butane. "The boiling point of the propane is minus 42.1 degrees Celsius, and the boiling point of butane is 0.5 degrees Celsius. They can instantly absorb a large amount of heat in high temperature environments, so that the surface of the object can be cooled quickly, and the minimum local temperature can be reduced to less than 0 degrees Celsius." Sheng expressed.

Although the cooling effect is good, the cooling spray is not the zero hazards that people call, but there are huge hidden safety hazards. "LNG and alcohol are flammable and explosive products. Once it is not handled properly, it is easy to cause dangerous accidents and become the fuse of the disaster." Zhang Sheng reminded that especially in the summer car in the summer car The flammable and explosive cooling spray is likely to cause explosion in the car. In addition, the spray can also cause fire.

Zhang Sheng suggested that the public should try to avoid choosing cooling spray products containing extremely flammable ingredients such as liquefied petroleum gas or di methal ether. When using water and ethanol as the main ingredients as the main ingredients, it is necessary to ensure that there is no bright fire within the range of use. If it is used in the car, the window should be opened in time after use to prevent excessive accumulation of flammable ingredients in the car and cause safety accidents.

Is the bayberry coloring because the chromosome is added?

Truth: It is its rich anthocyanin that makes the water color change

The hot weather makes many people have no appetite, and Yang Mei has a sweet and sour taste, which greatly increases the appetite.

However, when cleaning bayberry, many people found that the water of the bayberry will soon become pink, purple -red or pale pink. Therefore, it is also said that "the color of the bayberry is because the bayberry is added to the staining agent".

In response, Wang Qiang, executive deputy director of the Agricultural Products Quality Inspection Center (Hangzhou) of the Ministry of Agriculture and Rural Affairs, said that the situation of bayberry chroma was almost impossible. Baymeter is wrapped in the fruitless skin and the flesh is exposed. If you want to dye it, you can only soak it in the dye or spray it to the dye. However, spraying is difficult to achieve uniform coloring, and soaking will accelerate the rotten and deteriorate of bayberry. In addition, increasing the dyeing link will increase costs without substantial significance.

If there is no dyeing agent, what's the matter to wash the bayberry coloring?

"Baymeter fruit is rich in anthocyanins, and the solubility of anthocyanins in the water is extremely strong. The pink, purple -red or pale pink we see is the color of the anthocyanins dissolved in the water." Wang Qiang introduced, bayberry The cell wall of the flesh is relatively thin. When rinse bayberry or rubbing bayberry with water, it is easy to cause damage to the cell wall. The anthocyanins flow out and dye the water to the color.

Wang Qiang suggested that the public can soak bayberry in the mixed water of starch and salt. Salt water can stimulate fruit flies larvae to run out automatically, and starch can adsorb larvae and other impurities. After soaking for about 20 minutes, then rinse bayberry with water.

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