?????????? ????? AP42 TANKS 4.09D

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??????????????? AP42 TANKS 4.09D

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FLOW SHEET
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APPROACH TO EMISSION ESTIMATION
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THE GENERAL EQUATION FOR EMISSIONS ESTIMATION

• E A x EF x (1-ER/100)
• where
• E emissions
• A activity rate
• EF emission factor, and
• ER overall emission reduction efficiency,

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TOTAL LOSSES FROM FIXED ROOF TANKS

• LT LS LW
• where
• LT total losses, lb/yr
• LS standing storage losses, lb/yr,
• LW working losses, lb/yr

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STANDING STORAGE LOSS

• LS 365 VV WV KE KS
• where
• LS standing storage loss, lb/yr
• VV vapor space volume, ft3, see Equation 3-3
• WV stock vapor density, lb/ft3
• KE vapor space expansion factor, dimensionless
• KS vented vapor saturation factor,
  dimensionless
• 365 constant, the number of daily events in a
  year,

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WORKING LOSS

• LW 0.0010 MV PVA Q KN KP
• where
• LW working loss, lb/yr
• MV vapor molecular weight, lb/lb-mole
• PVA vapor pressure at daily average liquid
  surface temperature, psia
• Q annual net throughput, bbl/yr
• KN working loss turnover (saturation) factor,
  dimensionless
• for turnovers gt36, KN (180 N)/6N
• for turnovers 36, KN 1
• N number of turnovers per year, dimensionless

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TYPES OF STORAGE TANKS

• 1. Fixed-roof tanks
• 2. External floating roof tanks
• 3. Internal floating roof tanks
• 4. Domed external floating roof tanks
• 5. Horizontal tanks
• 6. Pressure tanks and
• 7. Variable vapor space tanks.

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TYPICAL FIXED ROOF TANK
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EXTERNAL FLOATING ROOF TANK (PONTOON TYPE).
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EXTERNAL FLOATING ROOF TANK (DOUBLE-DECK TYPE).
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INTERNAL FLOATING ROOF TANK.
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DOMED EXTERNAL FLOATING ROOF TANK.
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TYPICAL UNDERGROUND STORAGE TANK.
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A TYPICAL ABOVE-GROUND HORIZONTAL TANK
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VAPOR MOUNTED PRIMARY SEALS
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LIQUID-MOUNTED AND MECHANICAL SHOE PRIMARY SEALS
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SECONDARY RIM SEALS
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DECK FITTINGS FOR FLOATING ROOF TANKS
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DECK FITTINGS FOR FLOATING ROOF TANKS11.
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SLOTTED AND UNSLOTTED GUIDEPOLES
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LADDER AND WELL
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TANKS EMISSIONS ESTIMATION SOFTWARE, VERSION 4.09D

• http//www.epa.gov/ttn/chief/ap42/ch07/index.html

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ENTERING TANK DATA
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ENTERING TANK DATA
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VERTICAL FIXED ROOF TANK DATA ENTRY SCREEN
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CONE ROOF RADIUS
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DOMO ROOF RADIUS
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EXTERNAL FLOATING ROOF TANK DATA ENTRY SCREEN
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INTERNAL FLOATING ROOF DATA ENTRY SCREEN
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EXTERNAL FLOATING ROOF FITTINGS SCREEN
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SITE SELECTION SCREEN
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SINGLE COMPONENT TANK CONTENTS SCREEN
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MULTI-COMPONENT NO SPECIATION -- TANK CONTENTS
SCREEN
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MULTI-COMPONENT -- PARTIAL TANK CONTENTS SCREEN
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STORAGE TANK CONTENTS -- SPECIFY COMPONENTSSCREEN
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MULTI-COMPONENT VAPOR WEIGHT SPECIATION -- TANK
CONTENTSSCREEN
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VAPOR WEIGHT SPECIATION -- SPECIFY COMPONENTS
SCREEN
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MULTI-COMPONENT -- FULL SPECIATION TANK CONTENTS
SCREEN
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MONTHLY DATA ENTRY SCREEN
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GENERATE EMISSIONS REPORT
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DETAILED EMISSIONS REPORT
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CHEMICAL INFORMATION SCREEN ADD CHEMICAL DATA
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EDIT METEOROLOGICAL INFORMATION SCREEN
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• ??TANKS 4.09D?????????????