API RP 500, Appendix B - Minimum Air Induction Ratio to Achive Adequate Ventilation Using Fugitive Emissions
Total Hydrocarbon Leak Rate formula
| \(\large{ G = \frac{ E \; V }{ 60 \; mw } }\) |
Where:
\(\large{ G }\) = leak rate
\(\large{ E }\) = emission rate
\(\large{ V }\) = volume
\(\large{ mw }\) = average mole rate
\(\large{ 60 }\) = minutes/hour
Hydrocarbon Concentration formula
- As per NFPA 69 - Explosion Prevention System
| \(\large{ C = \frac{ G }{ Q } \; 1 \; -e^{-kn} }\) |
Where:
\(\large{ C }\) = concentration of hydrocarbon in air, percent (expressed in decimal formula)
\(\large{ G }\) = leak rate
\(\large{ Q }\) = fresh air induction rate, cfm
\(\large{ n }\) = number of air changes