Are these viral “cooling blankets” real?

Touch both the being. It is the same temperature, but wood Feel Warm warmer, right? Why this? It is not related to temperature but thermal energy. When you touch your hand, there is an interaction in the heat delivery. The energy is transferred from your warmer hand to the cooler object until the two are the same temperature. However, with a metal block takes more energy to reach your hand temperature. It is a colder feeling because it causes your hand to lose more energy.

You will notice the same when going to swim. The air temperature of 75 degrees Fahrenheit feels satisfied and comfortable, but going into the water of the same temperature looks really cold. This is because the water has a much higher mass and a specific heat capacity of the air, which leads to the loss of more thermal energy and feel cooler.

All blankets are cold

So, the blankets, how do they work? The blanket is basically insulating. This means that it prevents the transfer of energy between organisms at different temperatures. Wrap yourself into a blanket in a cold day prevents you from losing body temperature into the air around you, so you feel warm. Likewise, if a blanket is placed around a cold soda on a warm day, the transfer of thermal energy will slow from air to soda, while preserving the soda cold Long tallest.

But what if you feel the heat and put a blanket? In this case, two things can happen simultaneously. He can still work as heat insulator and slow energy transport between you and the air. Unless the surrounding air is higher than 98.5 ° F, this will make you more hot, not cooler.

However, the blanket can also have a thermal interaction with your body. Suppose you have an 80 -degree blanket in contact with a 98 -degree Fahrenheit person. This will raise the blanket temperature while reducing the thermal energy of your body. Yes, it will serve as a cooling blanket – at least for a few minutes, until the temperatures are equivalent.

So, what makes one blanket more effectively than the other? First, it must have a high mass, so that it requires a lot of energy to warm up. Second, the blanket needs a good connection with your skin to increase the thermal reaction. So, one of these light light blankets will not cool you too much. Otherwise, it is just a regular blanket.

But I am connected to trying these things, so I bought a cheap “cooling blanket” online. (I know, one of them will say that he only works if you get an expensive degree.) For those who say their cooling blanket was in the sun and measuring a temperature of 75 degrees Fahrenheit, I don’t believe you. check it out. I have three blankets on my sofa. One of them is the cooling blanket and others are normal. At the back is the same image that is taken using an infrared camera so that different colors represent different temperatures.