Energy Efficiency - History Of Energy Concerns, Energy Efficiency In Buildings, Transportation, Energy Efficiency In Industry, Other Techniques For Increasing Energy Efficiency
process amount travel mpg
Energy efficiency refers to any process by which the amount of useful energy obtained from some process is increased compared to the amount of energy put into that process. As a simple example, some automobiles can travel 40 mi (17 km) by burning a single gallon (liter) of gasoline, while others can travel only 20 mpg (8.5 km/l). The energy efficiency achieved by the first car is twice that achieved by the second car. In general, energy efficiency is measured in units such as mpg, lumens per watt, or some similar "output per input" unit.
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Interest in energy efficiency is relatively new in the history of modern societies, although England's eighteenth century search for coal was prompted by the decline of the country's forest resources. For most of the past century, however, energy resources seemed to be infinite, for all practical purposes. Little concern was expressed about the danger of exhausting the world's…
Approximately one-third of all the energy used in the United States goes to heat, cool, and light buildings. A number of technologies have been developed that improve the efficiency with which energy is used in buildings. Some of these changes are simple; higher grades of insulation are used in construction, and air leaks are plugged. Both of these changes reduce the amount of heated or air-condit…
About one-third more of the energy used in the United States goes to moving people and goods from place to place. For more than two decades, governments have made serious efforts to convince people that they should use more energy-efficient means of transportation, such as bicycles or some form of mass transit (buses, trolleys, subways, light-rail systems, etc.). These efforts have had only limite…
The final third of energy use in the United States occurs in a large variety of industrial operations such as producing steam, heating plants, and generating electricity for various operations. Improvements in the efficiency with which energy is used in industry also depends on two principal approaches: the development of more efficient devices and the invention of new kinds of technologies. More …
Most governmental bodies were relatively unconcerned about energy efficiency issues until the OPEC (Organization of Oil Exporting Countries) oil embargo of 1973-74. Following that event, however, they began to search for ways of encouraging corporations and private consumers to use energy more efficiently. One of the first of many laws that appeared over the next decade was the Energy Policy and C…
Efforts to increase public consciousness about energy efficiency issues have had some remarkable successes in the past two decades. Despite the increasing complexity of most developed societies and increased population growth in many nations, energy is being used more efficiently in almost every part of the world. Increased efficiency of energy use increased between 1973 and 1985 by as much as 31%…
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7 months ago
hi
This is retarded piece of information I've ever read.