On the other hand any conversion of primary energy to energy carrier is associated with some inefficiency. Primary energy is an energy form found in nature that has not been subjected to any human engineered conversion process. Primary and secondary are relative terms, and some sources may be classified as primary or secondary, depending on how they are used. Where primary energy is used to describe fossil fuels, the embodied energy of the fuel is available as thermal energy and around 70% is typically lost in conversion to electrical or mechanical energy.
Primary and secondary sources. Secondary energy cannot be harnessed directly from nature; rather, secondary energy is energy that has already been converted. Renewable energy was the main energy source for most of human history. All the articles you read in this site are contributed by users like you, with a single vision to liberate knowledge.Conventional sources of energy: Crude oil, natural gas, Hydel, nuclear etc. For many energy needs, it is much easier to use electricity or hydrogen than the primary energy sources themselves.The terms of primary and secondary energy are mainly used in the creation of energy statistis or balances.Most importantly, secondary energy is a good which has been changed from its original state so as to be used for consumption.Secondary energy refers to the more convenient forms of energy which are transformed from other, primary, energy sources through energy conversion processes.
Example: Petrol or gasoline, electrical energy from coal burning, hydrogen obtained by electrolysis of water etc. World scenario of energy: Conventional sources of energy account for 90% of the world’s production of commercial energy. Generally, energy production comes from two primary sources; these are fossil fuels and clean energy.Secondary sources come from primary sources; one example is electricity. http://www.eniscuola.net/en/argomento/energy-knowledge/energy-sources/primary-and-secondary-sources/10. Secondary sources provide second-hand information and commentary from other researchers. Examples are electricity, which is transformed from primary sources such as coal, raw oil, fuel oil, natural gas, wind, sun, streaming water, nuclear power, gasoline etc., but also refined fuels such as gasoline or synthetic fuels such as hydrogen fuels.Secondary energy sources are also referred to as energy carriers, because they move energy in a useable form from one place to another.
Secondary energy refers to the more convenient forms of energy which are transformed from other, primary, energy sources through energy conversion processes. Secondary energy resources are those which do not occur naturally but which are obtained from one or more of the primary energy resources. For example, using electricity for lighting is safer than using petroleum in candles or kerosene lamps. Secondary Energy Resources: These sources do not occur in nature but are derived from primary energy resources. They are called renewable energy sources because they are naturally replenished. This unit is equal to 3.6 million joules, with the joule, or newton-meter, being the standard unit of energy in physics. For example, using electricity for lighting is safer than using petroleum in candles or kerosene lamps. Examples include journal articles, reviews, and academic books.