Energy & Environment I NAME

Quiz #5

25 points

Closed book and notes

1. Modern combined cycle power-plants consist of a gas turbine engine (as the topping cycle) and a steam cycle (as the bottoming cycle). The fuel of choice is natural gas, though distillate oil is also used. Coal is very erosive and corrosive to gas turbine engines. However, recently some combined cycle power-plants have be built that use coal as the fuel. Describe how this is done. For example, make a schematic drawing of the power-plant.

OVER

2. Ethanol (grain alcohol) is used as an alternative fuel for automobiles. Discuss this use of ethanol. For example: What is the source of the ethanol? Where is it being used? What are the pros and cons of using it?