What are the Applications of cooling caused by evaporation?

Answer 1

One large industrial application of evaporation is evaporative cooling. When we spray water into the air, some of it evaporates. And when water evaporates, the water that is left is cooler because the evaporating water takes heat with it. You know this because if your arm is wet and a fan or breeze blows air across it, the skin of your arm feels cooler immediately. (Lick the back of your hand and blow on it.) Evaporative cooling is used on a massive scale to remove the heat of industrial processes. Just one example of evaporative cooling would be the cooling of condensers beneath steam turbines. This allows the extraction of the remaining heat from the steam in the exhaust stream from the turbine, and the steam will condense. The condensed steam, which is now water, is pumped back through a heat exchanger to warm it back up prior to it being pumped back into the steam generator of a nuclear fired, or a coal or fuel oil fired electric generating plant. (The steam turbine rolls an electric generator to create electricity.) We see evaporation used to remove water from products or materials in industrial processes. There are large scale evaporation ponds that concentrate salt, which is produced by the ton daily in or for industrial nations. Cargill has many acres in the San Francisco Bay area that are concentrating salt by natural evaporation, and they're doing that as you read this. Industry has large machines (evaporators) that tumble products or materials through them to expose them to an air stream to dry them. (We often heat that air we blow through the machine.) Milk is dehydrated in a large evaporator, and evaporated milk is used in more food products than you can count. We evaporate substances off in many industrial processes, and sometimes to remove water, but not always. We can recover substances that have been evaporated off. In the production of refined petroleum products, more volatile compounds are evaporated off to separate the more crude components. That's how we get vehicle fuels. And evaporation is the key to all distillation operations, like the ones that produce fuels or the ones that produce the spirits, the vodka, whiskey, rum and others, that we like to drink. Evaporation concentrates whatever is left after the water or other solvent is evaporated off. Concentration is useful in the chemical industry, and in many other industrial areas. Sometimes we recover the evaporated solvent or material. Distilleries do this, and so does the petrochemical industry and desalination plants (which make fresh water from salt water). Sometimes we just want to "get rid" of the solvent to recover a more concentrated product (either a useful or a waste product) for further processing or treatment. Evaporation is a physical process (as opposed to a chemical one) that allows separation and concentration of all kinds of things, in addition to uses in industrial cooling.

Answer 2

When you sweat, your sweat evaporates and cools you down. When you hang clothes out to dry, you spread them out as much as you can, so that the water in them evaporates quickly. When you just had a shower, you open the window, so that the bathroom dries fast. When you boil water, part of it evaporates, so you end up with less water than you started out with.

Answer 3

You body cools itself by evaporation of water: that's why people sweat on a hot day.

Answer 4

nuh ba yan walang sagut!!!!