In the length measurement, first choose EJ from the left dropdown and GJ from the right dropdown, enter the value you want to convert and click on 'convert'. Want a reverse calculation from GJ to EJ? You can check our GJ to EJ converter. Units of measurement use the International System of Units, better known as SI units, which provide a standard for measuring the physical properties of matter.
Measurement like energy finds its use in a number of places right from education to industrial usage. Be it buying grocery or cooking, units play a vital role in our daily life; and hence their conversions. When you are converting energy, you need a Exajoule to Gigajoule converter that is elaborate and still easy to use. Converting EJ to Gigajoule is easy, for you only have to select the units first and the value you want to convert.
If you encounter any issues to convert Exajoule to GJ, this tool is the answer that gives you the exact conversion of units. Electricity sales differ from net generation due to transmission losses. In , for example, the ratio of U. Efficiency for fossil fuel and nuclear sources.
Actual generation efficiencies, limited by the Second Law of Thermodynamics and design practicalities, fall short of this. More specifically, for U. Primary energy and end-use energy. The end-use energy and the energy losses are then individually tabulated, with the losses roughly twice as great as the end-use energy.
However, this separation creates a possibly misleading asymmetry in comparisons among modes of energy use, because end-use losses are neglected for fossil fuels used directly and these losses sometimes are substantial. From the standpoint of energy resources, the interesting number is the primary energythe total energy consumed at the generating plant, whether used efficiently or wasted.
Thus, it is usually desirable to consider energy budgets in terms of the energy content of the resource originally consumed, i. When this is done, the energy corresponding to 1 kWh of electricity depends upon the conversion efficiency, and is typically above 10, Btu. Energy equivalent for non-fossil fuel sources. To facilitate comparisons between different energy sources, a conversion factor is assigned to non-fossil fuel sources which relates electricity generated to a nominal primary energy.
For nuclear energy, this is done on the basis of the heat content of the steam produced 3. A similar approach can be used for geothermal plants. For the various renewable energy sources, the primary energy cannot be readily established and often is irrelevant. Gigawatt-year GWyr. Large individual plants have capacities in the neighborhood of 1 GW of electrical output GWe. This makes the gigawatt-year GWyr a natural unit to use in discussions of total electricity production.
By definition:. It is to be noted that a 1 GWe plant does not normally generate 1 GWyr of electricity per year. The ratio of the actual electricity generated to the amount which would be generated were the plant to operate at full capacity for one year is the capacity factor. Thus, typically, the relation between primary energy used and electricity produced is approximately:.
Librarians Authors Referees Media Students. Login Become a Member Contact Us. Introduction Many sorts of units are used in energy discussions. They fall into two broad categories: a those whose definition is not related to a particular fuel, which we here term "basic" units; and b those whose definition is related to idealized properties of a specific fuel, which we here term "source-based" units. These units, along with special topics related to electricity, are discussed in succeeding sections.
Table 1 gives conversion factors between units, as well as the energy content of specific fuels. If a check mark has been placed next to 'Numbers in scientific notation', the answer will appear as an exponential. For example, 8. For this form of presentation, the number will be segmented into an exponent, here 22, and the actual number, here 8. For devices on which the possibilities for displaying numbers are limited, such as for example, pocket calculators, one also finds the way of writing numbers as 8.
In particular, this makes very large and very small numbers easier to read. If a check mark has not been placed at this spot, then the result is given in the customary way of writing numbers. For the above example, it would then look like this: 80 Independent of the presentation of the results, the maximum precision of this calculator is 14 places. That should be precise enough for most applications.
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