Are those viruses “cooling blankets” true?

Touch both objects. They are at the same temperature, but they are wood I feel it It’s warm isn’t it? why is that? It’s about thermal energy, not temperature. When a hand touches an object, there is a thermal conduction interaction. Energy is transferred from warmer hands to cooler objects until the two reach the same temperature. However, with metal blocks, it takes more energy to reach the temperature of your hand. It feels cool as your hands lose more energy.

You will notice the same when swimming. The 75°F temperature feels great and comfortable, but walking in the same temperature water feels really cold. This is because water loses more thermal energy and feels cold, as it has a much higher mass and specific heat capacity than air.

All blankets are cool

So, blankets, how do they work? Blankets are basically insulators. This means preventing energy transfer between objects at different temperatures. By clasping in a blanket on a cold day, you will feel warm as you will not lose your body heat to the air around you. Similarly, placing a blanket around cold soda on a warm day slows down the transfer of thermal energy from the air to the soda, keeping the soda. cold long.

But what if you feel hot and wear a blanket? In that case, two things can happen at once. It still acts as a thermal insulator and can slow down the transfer of energy between you and the air. As long as the ambient air does not exceed 98.5°F, this will make you cooler and cooler.

However, blankets also have thermal interactions with the body. Suppose you have an 80°F blanket in contact with a 98°F person. This increases the temperature of the blanket while lowering the body’s thermal energy. Yes, it will act as a cooling blanket for at least a few minutes until the temperature is even.

So why do you make one blanket cooler and more effectively than another? First, warm-up requires high mass so that it takes a lot of energy. Secondly, the blanket should be in good contact with your skin to increase heat interaction. Therefore, one of those light fluffy blankets won’t let you cool that much. Other than that, it’s a regular blanket.

However, I’m the sucker that’s the one who tries these things, so I bought an inexpensive “cooling blanket” online. (I know, I’ll say that it won’t work unless you get expensive ones.) For those who say their cooling blankets are out in the sun and they measured a temperature of 75°F, I don’t believe you. Please check this out. There are three blankets on the sofa. One of them is a cooling blanket, while the other is normal. Behind it is the same picture taken with an infrared camera, with different colors representing different temperatures.