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Regulation (EU) No 517/2014 of the European Parliament and of the CouncilShow full title
Regulation (EU) No 517/2014 of the European Parliament and of the Council of 16 April 2014 on fluorinated greenhouse gases and repealing Regulation (EC) No 842/2006 (Text with EEA relevance)
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Changes over time for: ANNEX IV
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ANNEX IVU.K. METHOD OF CALCULATING THE TOTAL GWP OF A MIXTURE
The GWP of a mixture is calculated as a weighted average, derived from the sum of the weight fractions of the individual substances multiplied by their GWP, unless otherwise specified, including substances that are not fluorinated greenhouse gases.
where % is the contribution by weight with a weight tolerance of +/– 1 %.
For example: applying the formula to a blend of gases consisting of 60 % dimethyl ether, 10 % HFC-152a and 30 % isobutane:
→ Total GWP = 13,9
The GWP of the following non-fluorinated substances are used to calculate the GWP of mixtures. For other substances not listed in this annex a default value of 0 applies.
| a Based on the Fourth Assessment Report adopted by the Intergovernmental Panel on Climate Change, unless otherwise indicated. | |||
| b Substance not listed in the Fourth Assessment Report adopted by the Intergovernmental Panel on Climate Change, default value on the basis of the GWPs of other hydrocarbons. | |||
| Substance | GWPa | ||
|---|---|---|---|
| Common name | Industrial designation | Chemical Formula | |
| methane | CH4 | 25 | |
| nitrous oxide | N2O | 298 | |
| dimethyl ether | CH3OCH3 | 1 | |
| methylene chloride | CH2Cl2 | 9 | |
| methyl chloride | CH3Cl | 13 | |
| chloroform | CHCl3 | 31 | |
| ethane | R-170 | CH3CH3 | 6 |
| propane | R-290 | CH3CH2CH3 | 3 |
| butane | R-600 | CH3CH2CH2CH3 | 4 |
| isobutane | R-600a | CH(CH3)2CH3 | 3 |
| pentane | R-601 | CH3CH2CH2CH2CH3 | 5b |
| isopentane | R-601a | (CH3)2CHCH2CH3 | 5b |
| ethoxyethane (diethyl ether) | R-610 | CH3CH2OCH2CH3 | 4 |
| methyl formate | R-611 | HCOOCH3 | 25 |
| hydrogen | R-702 | H2 | 6 |
| ammonia | R-717 | NH3 | 0 |
| ethylene | R-1150 | C2H4 | 4 |
| propylene | R-1270 | C3H6 | 2 |
| cyclopentane | C5H10 | 5b | |
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