+ANNEX VI Method of calculating the GWP referred to in Article 3, point (1), of a mixture

ANNEX VI Method of calculating the GWP referred to in Article 3, point (1), of a mixture



ANNEX VI

Method of calculating the GWP referred to in Article 3, point (1), 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.

Σ (Substance × % × GWP) + (Substance Y % × GWP) + … (Substance N % × GWP), where % is the contribution by weight with a weight tolerance of +/– 1 %.

For example: applying the formula to a mixture of gases consisting of 60 % dimethyl ether, 10 % HFC-152a and 30 % isobutane:

Σ (60 % × 1) + (10 % × 124) + (30 % × 0)
Total GWP = 13,0

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. Only emissible components that fulfil broadly the same function are relevant for the calculation of the GWP.



Substance

GWP 100 (1)

Common name

Industrial designation

Chemical Formula

methane

 

CH4

27,9

nitrous oxide

 

N2O

273

dimethyl ether

 

CH3OCH3

1  (2)

methylene chloride

 

CH2Cl2

11,2

methyl chloride

 

CH3Cl

5,54

chloroform

 

CHC13

20,6

ethane

R-170

CH3CH3

0,437

propane

R-290

CH3CH2CH3

0,02

butane

R-600

CH3CH2CH2CH3

0,006

isobutane

R-600a

CH(CH3)2CH3

0  (3)

pentane

R-601

CH3CH2CH2CH2CH3

0  (3)

isopentane

R-601a

(CH3)2CHCH2CH3

0  (3)

ethoxyethane (diethyl ether)

R-610

CH3CH2OCH2CH3

4  (2)

methyl formate

R-611

HCOOCH3

11  (4)

hydrogen

R-702

H2

6  (2)

ammonia

R-717

NH3

0

ethylene

R-1150

C2H4

4  (2)

propene

R-1270

C3H6

0  (3)

cyclopentane

 

C5H10

0  (3)

(1)   

Based on the Sixth Assessment Report adopted by the Intergovernmental Panel on Climate Change, unless otherwise indicated.

(2)   

Based on the Fourth Assessment Report adopted by the Intergovernmental Panel on Climate Change.

(3)   

WMO et al. (2018). Scientific Assessment of Ozone Depletion, where value is given as <<1.

(4)   

WMO et al. (2018). Scientific Assessment of Ozone Depletion.

1. Ħarsa ġenerali

,

1.1 Referenzi

1.2 Rekwiżiti identifikati

1.3 Standards relatati

2. Rekwiżiti identifikati

Rekwiżiti

3. Standards relatati

Standards