Industry and Business, Energy as a Factor of Production In - Research Article from Macmillan Encyclopedia of Energy

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Energy Grades

There are four energy grades used to measure energy characteristics: weight, volume, area, and state. The weight grade is British thermal units (Btus) per pound of the energy resource. For example, coal has 10,000 Btus per pound, while oil has 20,000 Btus per pound, making oil the higher-grade resource. The volume grade is Btus per cubic foot of the energy resource. Oil has 1 million Btus per cubic foot while compressed natural gas, at 3,000 pounds per square inch, has 177,000 Btus per cubic foot, which makes oil the higher-grade resource. The weight and volume grades are important determinants for how easy energy is to transport. Light, compact energy sources are much easier to store and use than heavy, voluminous energy sources. The area grade is Btus per acre where the energy resource is found in its original state. Wood has 1 billion to...

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This section contains 2,145 words
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Buy the Industry and Business, Energy as a Factor of Production In Encyclopedia Article
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Macmillan Encyclopedia of Energy
Industry and Business, Energy as a Factor of Production In from Macmillan Encyclopedia of Energy. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.
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