«——【Preamble】】 ——»
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In this hot summer, the use rate of air conditioners is getting higher and higher, but for some families, high electricity bills may be a big burden, so many "inventors" try their best to find low-cost cooling solutions.
Just recently, a novel cooling method has become popular on social media, and it is said to achieve a cooling effect "comparable to that of an air conditioner".
In this regard, the gold medalist of the 24th Physics Asian Olympics and the guaranteed student of Peking University's "Excellence Program" said: This statement has a scientific basis.
Many netizens found that it was indeed cooler after experimenting, so what is the scientific basis for this?
Magical mineral water bottles
Many readers must be curious about what the specific operation steps of this method are, in fact, it is to prepare some empty mineral water bottles, cut off their bottoms, and then fix these bottles one by one in front of the electric fan.
When the electric fan is turned on, the air passes through these cut mineral water bottles, and the wind blowing out is said to be cooler than usual, in fact
There are some simple basic principles of fluid mechanics involved, so is there any comparison between its cooling effect and air conditioning?
It is important to know that the working principle of an electric fan is to push the air through the rotating blades, forming the wind.
Normally, the wind blown by the electric fan flows in a straight line, but when the wind passes through these cut mineral water bottles, the shape of the bottles has an effect on the air flow.
There is a pressure difference between the narrow and wide mouth of the bottle, and when the wind passes through the narrow mouth of the bottle, the air flow rate increases, similar to a small ejector, such a design makes the air flow more concentrated, and the wind speed increases, making the wind felt stronger and cooler.
The cut-out design of the mineral water bottle resembles a nozzle that concentrates the air in a small area, and this concentrated effect makes the wind blown by the fan more powerful, giving the impression of increased wind speed.
Although this method does not actually reduce the temperature of the air, it can make the body feel a more pronounced cooling effect by increasing the wind speed and changing the path of the air flow.
In addition, some people say that the presence of mineral water bottles will also increase the surface area of the air, and when the air passes through the bottle, the water molecules in the air will accelerate their evaporation due to the increase in friction and wind speed, taking away a certain amount of heat.
This evaporative cooling effect causes a slight increase in air humidity, but it also takes away some of the heat, making the person feel cooler.
It is said that using this method can reduce the indoor temperature by an average of 1 to 2 degrees Celsius, which is not comparable to air conditioning, but it is indeed an effective low-cost cooling method in the absence of air conditioning.
aroused heated discussions among netizens
Netizens also have a lot of discussions about this method, and some comments even make people laugh.
Some netizens jokingly said: "This method is simply an air conditioner for the poor, which is environmentally friendly and saves money." ”
Some netizens said: "I tried it, and the effect is really good, it's a summer artifact." Of course, some netizens ridiculed: "It's so troublesome, it's better to turn on the air conditioner directly." ”
Despite the mixed reviews, most people are still experimental and curious about this method, after all, who can say no to finding a simple and effective way to cool down in the heat and heat?
In my opinion, this method is particularly suitable for families who are sensitive to electricity bills or who are temporarily inconvenient to install air conditioning, and is undoubtedly a very interesting option for those who like to explore new things and are willing to try low-cost solutions.
Do you have anything to say about that?
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Resources:
The statement that the mineral water bottle installed on the electric fan becomes a self-made air conditioner in seconds is based on scientific evidence.2024-06-14 09:40·Strait Net
The electric fan is equipped with a mineral water bottle, and the cooling effect is comparable to that of an air conditioner? Physics Asian Olympic Gold Medalist: Achievable, with a scientific basis.2024-06-14 09:31·Qilu One Point