addressing uncertainty in oil and natural gas industry greenhouse
addressing uncertainty in oil and natural gas industry greenhouse
addressing uncertainty in oil and natural gas industry greenhouse
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( )<br />
Urel ( ) = Urel ( ) = Urel ( ) + Urel ( ) = 5 + 4 =± 6.40% scf mole% CO /yr<br />
2 2 2 2<br />
2 Sweet Flow % Mole<br />
2<br />
The aggregated <strong>uncerta<strong>in</strong>ty</strong> of the emissions is then calculated by apply<strong>in</strong>g Equation 4-4 <strong>and</strong> us<strong>in</strong>g the<br />
absolute <strong>uncerta<strong>in</strong>ty</strong> values.<br />
U ( abs) − U ( abs) = U ( abs) + U ( abs)<br />
2 2<br />
1 2 1 2<br />
U ( abs) − U ( abs) = (0.0671× 1,234.8× 10 ) + (0.0640× 44.985× 10 ) = 82.9×10 scf CO<br />
6 2 6 2 6<br />
1 2 2<br />
×<br />
Urel ( ) = =± 6.97% scf CO<br />
1,189.8 10 scf CO<br />
6<br />
82.9 10 scf CO2<br />
6<br />
×<br />
2<br />
( )<br />
Uncerta<strong>in</strong>ty Estimate of CO 2 e Emissions from Acid Gas Removal:<br />
2<br />
E<br />
CO e 2<br />
2<br />
⎛190 tonne CH4 21 tonne CO2e<br />
⎞<br />
= 62,600 tonne CO /yr + ⎜<br />
×<br />
⎟<br />
⎝ yr tonne CH4<br />
⎠<br />
E<br />
CO e 2<br />
2<br />
= 66,700 tonne CO e/yr<br />
Upper:<br />
U ( abs) = ( U ( abs) + U ( abs)<br />
U abs<br />
2 2<br />
ECO 2e ECO E<br />
2 CH4<br />
2 2<br />
( )<br />
E<br />
= (0.0697× 62,600) + (1.19× 21× 190) = 6,510 tonnes CO2e/yr<br />
CO2e<br />
Urel<br />
6,510 tonnes CO e/yr<br />
( )<br />
2<br />
( )<br />
E<br />
= 100% × =+ 9.77% tonnes CO2e/yr<br />
CO2e<br />
66,700 tonnes CO2e/yr<br />
U( abs) = U ( abs) + U ( abs)<br />
2 2<br />
ECO 2e ECO E<br />
2 CH4<br />
Lower: abs ( ) ( )<br />
ECO 2e<br />
2 2<br />
U( ) = − 0.0697× 62,600 + − 1.00× 21× 190 = 5,960 tonnes CO e/yr<br />
rel<br />
5,960 tonnes CO e/yr<br />
( )<br />
2<br />
U( )<br />
E<br />
= 100% × =−8.94% tonnes CO2e/yr<br />
CO2<br />
e<br />
66,700 tonnes CO2e/yr<br />
F.9 Uncerta<strong>in</strong>ty <strong>in</strong> Vented Sources – Pneumatics Devices <strong>and</strong> Chemical Injection Pumps<br />
Table F-11 summarizes the operat<strong>in</strong>g parameters for acid <strong>gas</strong> removal at the example facility.<br />
Table F-11. Operat<strong>in</strong>g Parameters for Pneumatic Devices <strong>and</strong> Chemical Injection Pumps<br />
Source<br />
Fuel<br />
Annual Activity Factor<br />
(all units comb<strong>in</strong>ed)<br />
Uncerta<strong>in</strong>ty<br />
(±%) a<br />
Pneumatic devices Produced Gas 64 pneumatic devices ±5% devices<br />
Chemical <strong>in</strong>jection pumps (CIPs) Produced Gas 67 CIPs ±5% pumps<br />
2<br />
Pilot Version, September 2009 F-25
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