Why would you need cooling if you are trying to heat water up. It just seems like wasted energy to me.
In: Engineering
Power plants turn liquid water in to steam. This steam turns turbines, like a gassy (not really a gas, but never mind) version of a water wheel.
When we turn water in to steam, it rises and goes off in to the atmosphere. This means we need more water to heat up to turn to steam.
Instead, we use big towers to let the water cool down and turn back to liquid (see above remark in parenthesis) so we can use it again without having to get fresh water.
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