Question

A power plant has an efficiency of 36 percent with 15 percent of the waste heat
being released to the atmosphere as stack heat and the other 85 percent taken away in the
cooling water (see Figure P29). Instead of drawing water from a river, heating it, and returning it to the river, this plant uses an evaporative cooling tower wherein heat is released
to the atmosphere as cooling water is vaporized.
At what rate must makeup water be provided from the river to offset the water
lost in the cooling tower?

Answer 1

Question : Arrange the following statements in correct sequence: </br> 1. These vapours condense to form tiny droplets of water.</br> 2. The water droplets come together to form large water droplets. </br> 3. The heat of the sun causes evaporation of water from the surface of the earth, oceans, lakes, rivers and other water bodies. </br> 4. The large water droplets become heavy and the air cannot hold them, therefore, they fall as rains.</br> 5. Water vapour is also continuously added to the atmosphere through transpiration from the surface of the leaves of trees.</br> 6. Warm air carrying clouds rises up.</br> 7. Higher up in the atmosphere, the air is cool.</br> 8. These droplets floating in the air along with the dust particles form clouds. </br>