The air conditioner is turned on at 26 degrees, which is cool and saves electricity？ Is there an optimal temperature？ A popular science →

　　The dog days have begun, and the temperatures in various places are also "striving for a new high". In the face of such high temperature, the best thing that can save our lives is air conditioning.

　　So how many degrees should the air conditioner be turned on?

　　Some people can drive as low as possible in order to cool down, some people believe that 26℃ is the most comfortable and energy-saving, and some people say that 28℃ is the most suitable, so which statement is correct?

　　Let’s start with the conclusion:

　　The most suitable temperature for air conditioning is not necessarily 26℃ or 28℃, but it is indeed more energy-saving to set the temperature higher.

　　Let’s talk about it in detail.

　　Adjust it once. What happened?

　　We all know that air conditioning is an electric tiger, which consumes a lot of electricity, and the lower the temperature is set, the more electricity is consumed. But how much has the power consumption changed? According to the measured research of air conditioner in a room in Maoming, Guangdong Province in 2015, it is found that if the set temperature of air conditioner is reduced from 26℃ to 25℃, the power consumption will increase by 47.89%, and if the set temperature of air conditioner is reduced from 27℃ to 25℃, the power consumption will increase by 134.35%, that is, the power consumption will be multiplied by two. Therefore, don’t underestimate this small degree, the impact is really not small.

　　Of course, the power consumption of air conditioners is affected by many parameters, which are related to the meteorological conditions such as temperature, humidity and wind speed in the region, the energy efficiency level of air conditioners, the refrigerants used, and the structure of air conditioners, etc. The set temperature rises by one degree, and the impact is not necessarily the same.However, many experiments have shown that the general trend is still "raise it by one degree and save electricity".

　　So what about putting it on a macro scale?

　　According to the Annual Development Research Report on Building Energy Efficiency in China in 2013, even in 2011, the power consumption of air conditioners in urban houses in China reached 52 billion kWh, accounting for 16.03 million tons of coal, accounting for 10.4% of the total energy consumption of houses. Based on this,If everyone can raise the air conditioner by 1℃, how much electricity can be saved.

　　Having said that, it is necessary to correct a misunderstanding, that is, some friends adjust the temperature of the air conditioner to a particularly low temperature in the hope of making the air conditioner cool quickly, but this method is not reliable. Because the working mode of the air conditioner is to "cool the air circulation in the room as soon as possible, and keep it after the room temperature reaches the set temperature", instead of "directly blowing out the cold air at the set temperature", the set temperature actually does not affect the temperature of the wind blown out by the air conditioner, and in case you forget to adjust it back … … That is, the cold wind is swishing and the electricity bill is rushing … …

　　Is there really an optimal temperature for air conditioning?

　　In fact, if you want to study it carefully, how many degrees the air conditioner is turned on is a very complicated matter, because people’s feeling of "cool" is subjective, and if you want to optimize it to the extreme, you need to consider the temperature, humidity, wall heat conduction, sunlight exposure and indoor dynamic changes of the indoor and outdoor environment.

　　In fact, this is also an important topic for engineers. They need to predict the temperature change curve of a day according to meteorological data and models, model and calculate various conditions in the building, and measure people’s comfort, so that the set temperature of air conditioners can be dynamically adjusted with specific conditions to achieve the purpose of energy saving and emission reduction. Therefore, I am afraid it cannot be simply said that there is a most suitable set temperature for air conditioners.

　　Of course, such fine control is often used in large office buildings, and it is not necessary for us to be so precise in our own homes. If we can make ourselves more comfortable, we can just raise the temperature a little.26℃ to 30℃ can be considered.During the day, when the family is active, you can turn it down a little, and when people want to sleep at night, just turn up the temperature and set a time.

　　Turning on the air conditioner like this saves electricity and is healthy.

　　Many friends who like to blow air conditioners may be a little wronged. Although setting the temperature higher can save energy, it is really hot. This kind of mood is of course understandable. Let’s talk about how to turn on the air conditioner better.

　　First of all, we should know that low temperature will make us cool, but there is more than one way to cool down if we want to feel cool. For example, we can use a small fan such as an air circulation fan at home to circulate the air in the room, which helps to make the temperature distribution in the room more uniform and the breeze can help us feel cool. Let the air-conditioning tuyere face the roof, which also helps to cool the whole house. In addition, it is necessary to ensure that the air conditioner is not blocked, so as to prevent the air conditioner from misjudging the indoor temperature. And air humidity will also greatly affect our feeling of "heat", so remember to turn on dehumidification when the humidity is too high, and don’t just turn down the temperature.

　　As for the friend who has a low air conditioner and a quilt … … Why don’t we remove the quilt first?

　　When it comes to air conditioning, there are two groups of people who need special attention. First of all, the baby, who has a strong metabolism, is prone to sweating in summer, and it is easy to cause skin problems such as prickly heat for a long time, which makes the baby itchy and painful and even affects sleep. Therefore, it is necessary to turn on the air conditioner to cool down. It should be noted that the tuyere should be adjusted and not blown directly.

　　Then there are the elderly, whose metabolism slows down and they feel cold easily, and many of them have cardiovascular and cerebrovascular diseases. In this case, the temperature of the air conditioner should not be set too low, especially the temperature difference between the air conditioner and the outdoor air conditioner should not be too large, so as not to cause sudden cooling and sudden heat when entering or leaving the door, and induce cardiovascular and cerebrovascular diseases. Therefore, many doctors will recommend that the air conditioner for the elderly be set to 28℃.

　　Finally, to sum up, we actually don’t have to worry too much about what is the most suitable temperature for air conditioning, and it is ok between 26℃ and 30℃. But we should also remember that if we feel cool enough, press the remote control to turn up the air conditioner by one degree, and we will not only participate in energy conservation and emission reduction, but also save electricity bills. Besides, don’t forget to ventilate the room regularly.