3. Why do thermal power plants use a lot of water in their operation? How many gallons of water per MWh produced by a combined cycle Natural Gas fired power plant with closed loop cooling use?

465 gallons of water per MWh to produced by a combined cycle Natural Gas fired power plant

Explanation:

we know that thermal power plant use a lot of water in operation because as we know thermal power plant is power station and it make electric power

and that is converted into heat energy

so because of converting heat into power in form of electricity so there is a lot of water is required

and we know most of heated water is transformed into steam that is rotate the turbine that make electricity

and

about 465 gallons of water per MWh to produced by a combined cycle Natural Gas fired power plant and in closed loop it is most expensive as once through cooling

and we know power plant is using about 60 gallons per kwh it would 435 gallons of required