Sustainable Energy
Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 20, Problem 19P
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Find the carbon footprint in the units of kgCO2/km for a fuel cell vehicle requiring 0.6 MJ/km at the wheels if all of the electricity is generated by burning natural gas in thermal generating stations.

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An average American consumes approximately 105 kJ of energy per day. The average life expectancy of an American is 77.9 years. How much coal would need to be burned to provide enough energy to meet a person's energy demands if the efficiency of energy production from coal is 38%? ☐g coal
Problem 10 A homeowner is trying to decide between a high-efficiency natural gas furnace with an efficiency of 95 percent and a ground-source heat pump with a COP of 3.3. The unit costs of electricity and natural gas are $0.112/kWh and $1.44/therm (1 therm = 105, 500 kJ). Determine which system will have a lower energy cost.
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