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How to Calculate Your Emissions. E = A × EF. CO. PM. 2000 lb /ton. VOC. NOx. 2014 Emissions Inventory Workshop. General Equation. For most emission sources the following equation is used: E = A * EF Where E = Calculated emissions A = Activity or annual process rate
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How to Calculate Your Emissions E = A × EF CO PM 2000 lb/ton VOC NOx 2014 Emissions Inventory Workshop
General Equation • For most emission sources the following equation is used: • E = A * EF • Where • E = Calculated emissions • A = Activity or annual process rate • EF = Emission factor - determined by the method of calculation • Example sources: • AP-42 • WebFire • Permit 2014 Emissions Inventory Workshop
Industrial Boiler – CO Calculation Process: 10-100 mmbtu/hr boiler SCC: 10200602 Fuel: Natural Gas Capacity: 84 mmbtu/hr Control: Uncontrolled 2014 Emissions Inventory Workshop
US EPA CHIEF Website: http://www.epa.gov/ttn/chief/index.html 2014 Emissions Inventory Workshop
Industrial Boiler – CO Calculation 2014 Emissions Inventory Workshop
EF A E • E = A * EF = ??? tons Convert to tons: 2014 Emissions Inventory Workshop
Industrial Boiler – CO Calculation 2014 Emissions Inventory Workshop
Engine – Formaldehyde Calculation Process: 2 - Cycle Lean Burn Natural Gas Engine SCC: 20200252 Fuel: Natural Gas Capacity: 1100 hp Control: Uncontrolled 2014 Emissions Inventory Workshop
US EPA CHIEF Website: http://www.epa.gov/ttn/chief/index.html 2014 Emissions Inventory Workshop
EF A E • E = A * EF = ??? tons Convert to tons: 2014 Emissions Inventory Workshop
Engine – Formaldehyde Calculation 2014 Emissions Inventory Workshop
Emergency Generator – NOx Calculation Process: Reciprocating emergency generator SCC: 20200102 Fuel: Diesel Capacity: 400 hp Pollutant: NOx Factor: 604 lbs/1000 gal Control: Uncontrolled Operation: 50 hours Activity: 500 gal Heat Content: 137 mmbtu/1000 gal 2014 Emissions Inventory Workshop
EF A • E = A * EF = ??? tons E Convert to tons: 2014 Emissions Inventory Workshop
Surface Coating – Xylene/VOC Calculation Process: Surface coating – spray painting SCC: 40200101 Pollutant: Xylene, VOC (non-HAP) Paint: Acrylic Red 2014 Emissions Inventory Workshop
E = A * VOC Content * (Xylene:VOC Ratio) = ??? tons Now, for non-HAP VOC: VOC (non-HAP) = Total VOC ̶ Xylene VOC (non-HAP) = 2014 Emissions Inventory Workshop
Natural Gas Production – Pneumatic Devices Process: Pneumatic Controllers: High Bleed SCC: 31000242 Pollutant: VOC Bleed Rate: 32.1 scf/hr whole gas 2014 Emissions Inventory Workshop
E = Gas Vented * VOC Content = ??? tons = 1406 Mscf wt. % VOC Gas MW Conversion VOC = Gas Vented 19.25 = 9,284 lb 1406 Mscf VOC = VOC Emissions = 9,284 lb = 4.642 tons VOC 2014 Emissions Inventory Workshop
Control Equipment Calculations 2014 Emissions Inventory Workshop
Control Efficiency Calculations • Capture Efficiency: • The percentage of air emission that is collected and routed to the control equipment. Most control devices have a 100% capture efficiency. • Control Efficiency: • The percentage of air pollutant that is removed from the air stream by the control device. 2014 Emissions Inventory Workshop
Stone Quarry – Primary Crushing Calculation Process: Primary Crushing SCC: 30532001 Pollutant: PM10 Control: Water Spraying 2014 Emissions Inventory Workshop
Stone Quarry – Primary Crushing Calculation 2014 Emissions Inventory Workshop
EF A E • E = A * EF * (1 – Control Efficiency) = ??? tons Account for control: Convert to tons: 2014 Emissions Inventory Workshop
Two Controls – Grain Handling Calculation Process: Grain handling for feed manufacture SCC: 30200801 Activity: 10,000 tons Pollutant: PM 10 Factor: 3 lbs/ton Primary Control: Cyclone Secondary Control: Baghouse 2014 Emissions Inventory Workshop
A Complex Situation: Capture Efficiency, Primary Efficiency & Secondary Efficiency 2014 Emissions Inventory Workshop
Two Controls – Grain Handling Calculation • Capture Device: Hood • Therefore, the other 10% is emitted directly to the atmosphere • Primary control device: Cyclone • The control equipment removes 80% of PM 10 from the emission stream. • Secondary control device: Baghouse • The control equipment removes 98% of PM 10 from the emission stream. 2014 Emissions Inventory Workshop
Total E = Captured E + Uncaptured E = ??? tons Captured E = A * EF * CE * (1 – PE) * (1 – SE) Uncaptured E = A * EF * (1 – CE) 2014 Emissions Inventory Workshop
A EF • Captured E = A * EF * CE * (1 – PE) * (1 – SE) Account for capture and controls: CE SE PE 2014 Emissions Inventory Workshop
Uncaptured E = E * (1 – CE) Account for all PM 10 emissions: Convert to tons: 2014 Emissions Inventory Workshop
1 Amount to Hopper 5,400 lbs * 0.98 = 5,292 lbs 4 30,000 lbs of PM generated Amount to Hopper 27,000 lbs* 0.80 = 21,600 lbs 6 2 3,000 lbs of PM emitted “not captured” 27,000 lbs– 21,600 lbs = 5,400 lbs to the Baghouse Amount emitted to the atmosphere 5,400 lbs – 5,292 lbs = 108 lbs 108 lbs stack emissions + 3,000 lbs “not captured,” emitted as a fugitive = 3,108 lbs = 1.554 tons 5 7 27,000 lbs of PM “captured” , sent to cyclone 3 2014 Emissions Inventory Workshop
Other Examples If you would like to see an example calculation for another industry, process, or control equipment not presented today: Please email aei@deq.ok.gov and we will create an example for you. 2014 Emissions Inventory Workshop
ODEQ Emissions Inventory Section Program Manager: Mark Gibbs Mark.Gibbs@deq.ok.gov Emissions Inventory Staff: Cooper Garbe Cooper.Garbe@deq.ok.gov Cody Lathrop Cody.Lathrop@deq.ok.gov Michelle Horn Michelle.Horn@deq.ok.gov Justin Milton Justin.Milton@deq.ok.gov Carrie Schroeder Carrie.Schroeder@deq.ok.gov http://www.deq.state.ok.us/aqdnew/emissions/index.htm 2014 Emissions Inventory Workshop