Question
& test.mapnwea.org
A builder plans the heating system for a new office building. He reviews two different systems to determine how different fuels
and processes produce energy.
Conventional
Generation
Combined Heat and Power
5 MW natural gas combustion turbine
and heat recovery boiler
Power station fuel
(U.S. fossil mix)
91 units fuel
Power plant Electricity
30
units
electricity
Electricity
147 units fuel
Combined
heat &
power
(CHP)
100 units fuel
56 units fuel
Boiler fuel
Boiler
Heat
45
units
steam
Heat
Which heating system has the best cost benefit for the new office building?
O A. The combined heat and power system because natural gas is a common fuel in most areas.
O B. The conventional generation system because it uses fossil fuels, which are cheap and abundant.
O c. The conventional generation system because it has a second system available should the first system fail.
O D. The combined heat and power system because it uses less fuel than the other system to produce the same amount of energy.
Answer
D. The combined heat and power system because it uses less fuel than the other system to produce the same amount of energy.