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It's too hot. Can dry ice be used to cool the room?
Dry ice is solid carbon dioxide. Although it will not cause direct harm to the body, if dry ice is released directly indoors, it will lead to high carbon dioxide density and suffocation.

If it is a dry ice cooling system on computer hardware, of course, but dry ice cooling is usually used when extreme overclocking occurs because of its high cost and short duration.

Dry ice condenses carbon dioxide into colorless liquid at room temperature and pressure of 6079.8 kPa, and then quickly evaporates at low pressure, and then condenses into dense ice-like solid matter with a temperature of-78.5℃, which is dry ice. The cold storage capacity of dry ice is more than 1.5 times that of water ice. After absorbing heat, it sublimates into carbon dioxide gas, which has no residue, toxicity and odor, and has sterilization effect.

It is not liquefied after heating, but directly gasified, so it is often used to keep objects in a frozen or low temperature state. Dry ice is widely used in food, sanitation, industry and catering.

Extended data:

Indoor cooling method

1, thermal insulation curtain, reflecting sunlight and resisting ultraviolet rays.

The so-called thermal insulation curtain, like the traditional curtain, is actually just a thin sheet, but the price is very low, less than several thousand yuan. Using the material and weaving process of cloth itself can reflect light and heat source, effectively restrain the rise of indoor temperature, and have the effect of preventing perspective, so that the indoor situation can not be seen from the outside, improve the effect of hot and cold rooms, and contribute to energy saving.

2, heat insulation paper cooling 2-3 degrees.

Generally speaking, the room temperature of the west sun is quite high in the afternoon, and it can be said that it is sultry in summer. If you start to turn on the air conditioner at Xiyang time in the afternoon, the accumulated cost in summer will be amazing. At present, there is a kind of paper on the market, which can block ultraviolet rays and thermal radiation, and stick it on the surface of the window to reduce the indoor temperature by 2-3 degrees. Keeping the space ventilated is also the best way to cool down.

3. Create space convection

Yes! ! If there is convection in the space, the room will be colder, especially in high-rise buildings. If there is a flowing wind, even the electric fan can't blow. Of course, if there is no way to use natural wind convection, using electric fans with air conditioning is also a good progress for the quick-cooling room, and the most important thing is to save a lot of electricity. Planting plants at home can shelter and cool down.

Plant many green plants on windows and roofs.

If plants are planted on the roof, the roof is afforested and the heat absorbed by the roof is reduced, the indoor temperature will be reduced more effectively. Under the scorching sun, the temperature difference between the upper and lower surfaces of roofs with and without plants can even reach 20 degrees. Heat-resistant local mixed seed grass used as roof lawn in Taiwan Province Province. As long as you water it regularly, you don't have to worry about pests and climate.

Baidu encyclopedia-dry ice