ENVT 0845 Chapter Notes - Chapter 15: Energy Conversion Efficiency, Surface Mining, Lignite
15 Mar 2016
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Energy is the ability to do work or to move matter. It cannot be felt or observed, except as heat or light. Energy is something that most people spend a great deal of their income on in the form of electrical power, natural gas or oil. 15. 1 energy production and consumption: energy sources. Primary energy: energy contained in natural resources. Secondary energy: when primary energy is converted into another form. Percentage of primary source energy that is captured in. Product of all of the energy conversions and end use. 100 units of coal powers a light bulb that produces 1. 2 units of light energy, 1. 2% efficiency. Derived from sources that exist in limited quantities. Sources that are not depleted when used or can be replenished quickly. 15. 1 energy production and consumption: end use. Rates of primary energy consumption vary by country.
