An ordinary electric fan does not cool the air, still it gives comfort in summer. Explain
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All the electricity that is driving the fan turns directly into heat. So a fan does not cool the room at all. ... By blowing air around, the fan makes it easier for the air to evaporate sweat from your skin, which is how you eliminate body heat. The more evaporation, the cooler you feel.
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The fan does not cool the air, still, it gives comfort in summer because of the following reason:
- An electric fan works on the principle of wind-chill effect (it adds the heat to the area).
- This work of adding heat to the area by the fan can be detected in a fully isolated room.
- Evaporation is the process that takes place on the surface of liquid while getting converted into the vapour (gas phase).
- When the fan rotates along with circulating the air present in the area, it also evaporates the sweat (body heat) from the skin.
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