On Energy and Transportation
The Energy Crisis
- New York City, 1969: Electrical Energy Shortage -- Consolidated Edison Company cut power by 20%.
- Since 1900, electrical energy consumption in the U.S. has been increasing at an average annual rate of 7%. At this rate, consumption of energy doubles in ten years.
- Energy crisis not only associated with electrical energy. Approximately one-quarter of this energy is used for the generation of electricity. The rest is used for transportation, industrial processes, and heating.
- There is a sufficient amount of coal for at least the next millennium at the present rate of consumption, but not for petroleum and natural gas, although there is enough to last many decades.
- Associated with the combustion of fossil fuels is the release of pollutants.
- The reduction of energy consumption does not imply the reduction of life quality. An increase in the efficiency of use can equal to an increase in supply.
- The automobile, while offering convenience and privacy, is an excessively large consumer compared to mass transportation systems.
- Crisis is a conflict between supply and demand.
In Relation to Transportation
- Indirect uses of energy notably the energy required to produce and service vehicles, construct and maintain road and rail systems, and provide the amenities required for transportation services (ex. airports, terminals, garages) causes one-third of all energy consumption.
- Statistic: There are approx. 100million passenger cars, and each car on average is driven 10,000 miles, consuming approx. 800 gallons of gasoline per year.
- According to the Environmental Protection Agency (EPA), the most important factor affecting vehicle milage is weight. For example, a 2000-lb vehicle is twice as efficient as a 4000-lb vehicle. A reduction in the weight of automobiles could result in the reduction in fuel consumption. Energy consumption for transportation could be reduced by more than 25%.
- Prior to 1973, there was a shift to less energy efficient modes of transportation. Truck, automobile, and airplane usage steadily increased. Deterioration of rail transportation (passenger/freight) was caused by the use of less energy efficient modes of transportation.
- High speed rail passenger service could replace short distance air travel. Trains are not only approximately three times as energy as efficient as airplane, but they provide direct service to urban areas, eliminating the need for transportation to and from airports (indirect energy consumption).
- Buses and subways are twice as energy efficient as the private automobile. Public transportation reduces urban congestion as well as alleviates the need for space consuming parking facilities.
Source
Krenz, Jerrold H. Energy: Conversion and Utilization (Boston: Allyn and Bacon, Inc., 1976), 2, 8, 310-314, 317-318.
Haylie Chan
Krenz, Jerrold H. Energy: Conversion and Utilization (Boston: Allyn and Bacon, Inc., 1976), 2, 8, 310-314, 317-318.
Haylie Chan
November 8, 2010
Water: Hydropower
Presently, hydropower is used almost exclusively for the generation of electricity.Unlike fossil fuels, water power is a renewable source of energy which does not deplete through usage.
In 1850, wind and water power accounted for two-thirds of mechanical power used in the U.S.
Small scale hydropower installations utilized only a small fraction of a stream’s or river’s potential
Large-scale hydroelectric power plants are built in conjunction with a reservoir. From the reservoir, water may be withdrawn.
Source
Krenz, Jerrold H. Energy: Conversion and Utilization (Boston: Allyn and Bacon, Inc., 1976), 259-260.
Krenz, Jerrold H. Energy: Conversion and Utilization (Boston: Allyn and Bacon, Inc., 1976), 259-260.
Haylie Chan
November 9, 2010