MEN - M! REX Course Hero Pinterest . The w... _ LOLONCE - E... &SE-T WeTss/ARM ... Atmospheric and Oceanic Sciences 104 Homework Assignment #2 Fall 2008 Due Thursday, October 9, 2008 1. A 1000-MW electric power plant has an efficiency of 33 percent with 15 percent waste heat being released to the atmosphere as stack heat and the other 85% taken away in cooling water drawn from a nearby river (used to cool and condense down the hot steam exiting the generator turbines). To eliminate heating the bodies of water surrounding the power plant, the evaporation of the coolant water is what cools the steam; the water vapor generated by this evaporation is released to the atmosphere. At what rate must we supply 15 C water from the river to make up for the water lost by evaporation in the ? Stack heat Evaporative cooling 1000-MW Power plant 33% efficient Makeup water Cooling tower River 2. Suppose the total world energy consumption of fossil fuels, equal to 3 x 1017 kJ/yr, were to be obtained entirely by combustion of petroleum with the approximate chemical formula C2H3. Combustion of this petroleum releases about 43 x 103 kJ/kg