The Correct Answer is:

Question of the Month August 2010

What are the two commonly used metrics to measure power plant water use?

Consumption & Water use or Withdrawal

&

What are the two most widely used types of cooling water systems designs in

thermoelectric power plants?

Once-through (open loop) or recirculating (closed loop)

Dry cooling systems do exist but they are not widely used due to their negative impact on power

plant efficiency and their high first cost