API 4681 : 1999

1 INTRODUCTION
  1.1 BACKGROUND
  1.2 PRINCIPLES OF USE AND SYSTEM REQUIREMENTS
  1.3 INSTALLATION
  1.4 SAVING APIDRAIN FILES
  1.5 EXITING FROM APIDRAIN
  1.6 TECHNICAL SUPPORT
2 USING APIDRAIN
  2.1 START-UP
  2.2 FACILITY DESCRIPTION
  2.3 APIDRAIN TOOLBAR ICONS
  2.4 PROCESS DATA ENTRY
      2.4.1 Creating Process Units and Drains
      2.4.2 Use of AP-42 Zero/Pegged Factors
      2.4.3 Use of OVA Screening Values
      2.4.4 Use of Stripping Efficiency Factor Estimation Method
      2.4.5 Use of the UT Drain Model
  2.5 REPORT SET-UP AND PRINTING
3 MODEL EQUATIONS
  3.1 USE OF STRIPPING EFFICIENCY FACTORS
  3.2 MODELING EQUATIONS FOR THE UT DRAIN MODEL
      3.2.1 Sealed Drain
      3.2.2 Unsealed (Open) Drain
  3.3 TEMPERATURE-CORRECTED FACTORS
      3.3.1 Diffusion Coefficients
      3.3.2 Viscosities
      3.3.3 Phase Densities
4 MODEL "WORK-AROUNDS" FOR EXCEL [TM] 97
  4.1 WARNING DISPLAY FOR CHE_NAMELIST FORMULA REFERENCE
  4.2 INITIATION OF STRIPPING EFFICIENCY MODEL
5 REFERENCES
Appendix A - COMPARISON OF METHODS FOR CALCULATING HENRY'S
             LAW COEFFICIENTS
Appendix B - ESTIMATION OF DIFFUSION COEFFICIENTS BY
             DIFFERENT CORRELATIONS
Appendix C - CONVERSION FACTORS

Incorporates the mechanistic model for refinery process drains into a suite of procedures for estimating emissions from refinery process drains resulting in a user-friendly software tool called APIDRAIN.