Optimizing Flare Stack Performance and Radiation Impact Analysis in Onshore Facilities: A Simulation Based Study Using FLARESIM and PHAST Software
Abstract: Flare stacks are critical safeguards in oil and gas and petrochemical facilities for safe disposal of excess hydrocarbons. This paper presents a concise, simulation-based investigation of flare performance and thermal radiation impacts using FLARESIM (for ignited releases) and PHAST (for unignited dispersion). Site-representative compositions, flow rates, and meteorological categories were modelled for two onshore stacks: a High-Pressure (HP) flare and a Tank Vapor (TV) flare. Design acceptance criteria were aligned with API 521 radiant heat thresholds and company standards. Results indicate that a 25 m HP flare and a 15 m TV flare meet personnel and equipment protection criteria, with sterile-area radii of ~39 m and ~23 m respectively, and fence-line distances of ~90 m and ~50 m. Unignited toxic (H2S) and flammable dispersion remained buoyant above tip elevation for the assessed weather categories. The study demonstrates that targeted adjustments to stack height and tip sizing, validated via radiation isopleths, can achieve compliance while minimizing footprint.
Keywords: Flare system, Radiation Impact analysis, Hydrocarbon Flare, Flaresim, Sterile area
How to Cite?: Umesh Banker, Dr. Kiran D. Bhuyar, "Optimizing Flare Stack Performance and Radiation Impact Analysis in Onshore Facilities: A Simulation Based Study Using FLARESIM and PHAST Software", Volume 14 Issue 12, December 2025, International Journal of Science and Research (IJSR), Pages: 980-983, https://www.ijsr.net/getabstract.php?paperid=MR251209221052, DOI: https://dx.doi.org/10.21275/MR251209221052