Analysis of Fire Propagation, Heat Release Rate, and Radiation Growth in Motorcycle Fires in Open Areas Using Pyrosim: A Case Study on the UNJ Campus
Pratomo Setyadi, Dicky Chandra, Imam Asyrafi Alfarizi, Mayzar Maulana

Universitas Negeri Jakarta

Abstract

The motorcycle open parking space is provided UNJ (State University of Jakarta) with limited capacity, but the number of academic community is increasing. The arrangements sometimes being done in a scrambled mode with very limited spacing, and these motorcycles parked in hot condition from the engine and environment. As a result, an uncontrolled two-wheeled vehicle layout can pose a danger in the event of a fire. This study uses Pyrosim 2025 software as a pre-software FDS (Fire Dynamic Simulator) that will analyze the Flame Spread, HRR (Heat Release Rate) graph increase, and graph (conduction, convection, and radiation). The object that is burned is in the form of a motorcycle, with a material consisting of foam (as a motorcycle seat) and polypropylene (as a motorcycle body). Furthermore, the chemical reaction to be used is propylene. The particle ignitor model is designated as the ignition source in the foam material. In this simulation, the influence of wind is ignored to see the magnitude of the influence of radiation and natural coction on heat transfer on the spread of fire. The simulation results presented are in the form of a graph of a significant increase in HRR (Heat Release Rate) when the fire starts to ignite and grows to spread to the surrounding motors, visualization shows that the fire spreads in the direction of the model^s material geometry, and heats the surrounding material with the principles of conduction, radiation and natural convection. The heat release rate spikes immediately as soon as most of the material decomposed and turned into flashover. The radiation also increasing when the fire spread and the flame size become enormous. The heat release rate, flame spread, flame size : height and diameter, radiation increased almost linearly.

Keywords: Ignition, Fuel, HRR, Radiation, Fire, Spread

Topic: Energy and Environmental Physics