Cabras - Combustion Emissions from Emergency Stationary IC engines

Unit Description1

Insignificant or 

Significant 

Source?

Generator Power 

Output (kW)1

Engine Serial 

Numner1

Engine Power 

Rating (HP)2

Maximum 

Hours of 

Operation 

(hrs)3

Fuel Input 

(mmBtu/hr)4 NOx CO SOx PM VOC Benzene Toluene Xylenes Propylene 1,3-Butadiene Formaldehyde Acetaldehyde Acrolein Naphthalene PAH - 

Total

Emer. Diesel Engine #1 (ICE-1, Area C) Significant 300 1DZ04990 449 2,936 3.13 27,304.8 8,220.8 2,702.4 2,407.5 469.8 8.6 3.8 2.6 23.7 0.4 10.9 7.1 0.9 0.8 1.5

Emer. Diesel Engine #2 (ICE-2), D Lot Significant 300 1DZ07436 449 2,936 3.13 27,304.8 8,220.8 2,702.4 2,407.5 469.8 8.6 3.8 2.6 23.7 0.4 10.9 7.1 0.9 0.8 1.5

Emer. Generator Cummins (ICE-3), Area A Insignificant 300 30337126 435 270 3.05 3,641.0 784.6 240.8 258.4 264.0 0.8 0.3 0.2 2.1 0.0 1.0 0.6 0.1 0.1 0.1

TOTAL 58,250.6 17,226.2 5,645.7 5,073.4 1,203.5 17.9 7.9 5.5 49.6 0.8 22.7 14.7 1.8 1.6 3.2

total tpy --> 29.1 8.6 2.8 2.5 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Notes:

** Engine spec. sheet was not provided by manufacturer; only engine rate was provided. AP42 emission factors are utilized to calculate emissions.

NOx CO SOx PM VOC Benzene Toluene Xylenes Propylene 1,3-Butadiene Formaldehyde Acetaldehyde Acrolein Naphthalene PAH - Total

9.3 2.8 0.9 0.8 0.2 0.003 0.001 0.001 0.008 0.000 0.004 0.002 0.000 0.000 0.001

9.3 2.8 9.0 0.8 0.2 0.003 0.001 0.001 0.008 0.000 0.004 0.002 0.000 0.000 0.001

13.5 2.9 0.9 1.0 1.0 0.003 0.001 0.001 0.008 0.000 0.004 0.002 0.000 0.000 0.001

TOTAL 32.1 8.5 10.8 2.6 1.3 0.009 0.004 0.003 0.024 0.000 0.011 0.007 0.001 0.001 0.002

Notes:-

1. Power output for all ICEs and maximum hours of operation for ICE-3 were provided by Mobil on May 13, 2010. 

2. For ICE 1 & 2 engine power rating was provided by Caterpillar Sales Rep, James Cumiford on September 12, 2011. For ICE 3, engine power rating was provided by Cummins Sales Rep Karyl Robins on September 12, 2011.

3. Based on the discussion with Mobil on Sep. 24, 2010, the maximum annual operating hours for ICE-1 and ICE-2 are based on 4 months + 2 hours each month for the remaining 8 months.

4. Fuel Input is calculated for ICE-1 & 2 based on information provided by Caterpillar and heating value obtained from EPA's AP 42. (See the reference).

Diesel heating value 137,000 btu/gal http://www.epa.gov/ttn/chief/ap42/appendix/appa.pdf 

Max Fuel rate 22.88

For ICE-3 fuel Input is calculated based on the brake specific fuel combustion (BSFC) fator provided in AP-42 Section 3.3, Gasoline And Diesel Industrial Engines, (10/96), Table 3.3-1 and Table 3.3-2 & Table 3.4.1.

Fuel Input 7,000.00 Btu/bhp-hr 0.007 MMBtu/bhp-hr

5. For ICE 1 and ICE 2 the emission factors are based on the spec sheet provided by manufacturer (Caterpillar).

For ICE - 3 emission factors are taken from AP-42 Section 3.3, Gasoline And Diesel Industrial Engines, (10/96), Table 3.3-1 and Table 3.3-2 & Table 3.4.1 as engine spec sheets are not available for model year 1992 engine per the manufacturer.

NOx CO SOx PM VOC Benzene Toluene Xylenes Propylene 1,3-

Butadiene Formaldehyde Acetaldehyde Acrolein Naphthaline PAH - Total

<600 hp 3.10E-02 6.68E-03 2.05E-03 2.20E-03 2.25E-03 9.33E-04 4.09E-04 2.85E-04 2.58E-03 3.91E-05 1.18E-03 7.67E-04 9.25E-05 8.48E-05 1.68E-04

>600 hp 2.40E-02 5.50E-03 2.54E-04 7.00E-04 6.42E-04 9.33E-04 4.09E-04 2.85E-04 2.58E-03 3.91E-05 1.18E-03 7.67E-04 9.25E-05 8.48E-05 1.68E-04

Based on Information provided by Manufacturer 

NOx CO SOx PM VOC

Emer. Diesel Engine #1 (ICE-1, Area C) 9.30 2.80 NA 0.82 0.16

Emer. Diesel Engine #2 (ICE-2), D Lot 9.30 2.80 NA 0.82 0.16

Emer. Generator Cummins (ICE-3), Area A Not provided. Not provided. Not provided. Not provided. Not provided.

HAP Emission Factors (lbs/MMBTU)

Short Term (lbs/hr)

Annual (lbs/yr)5

Emission Factor (lb/hr) Unit Description

Emer. Diesel Engine #1

Emer. Diesel Engine #2

Emer. Generator Cummins

Emission Factor (lb/hp-hr)

Engine Size

Mobil Oil Guam Inc. Trinity Consultants