Effect of wind velocity and flare height parameters on pollution dispersion from one flare with zonal method

Document Type : Research Paper

Authors

Department of Mechanical Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

Abstract

With increasing growth of industrial units in developing countries and pollutants produced by these units, nowadays distribution and dispersion modelling of atmosphere pollutants especially in urban areas is an inevitable importance. Dispersion modelling of atmosphere pollutants is a methodology to estimate focus and concentration values of pollutants related to emission source in different seasons. In current study, using numerical analysis, a thermal diffusion of flare and focus values of industrial pollutants simulation using air zonal methodology has been presented. After studying pollutants emission in open area, validation has been done using laboratory data results and computational fluid dynamics method. The results of this study indicate the ability of presented air zonal methodology to predict thermal diffusion of flare and distribution concentration of pollutant source and information gained from this analysis. Then an exploration of effective parameters in pollution emission such as wind velocity, flare height, and pollution emission rate in downstream has been done. As the results show, when wind velocity rises by 130%, pollution will reach far away from production source and with increase in flare height by 25%, the pollution concentration values on the ground has been reduced by 44%. Also with addition of barrier in pollution dispersion path, pollution level will increase by 60%.

Keywords

[1]          Sandberg, H., Lindstorm S., 1987, "A Model for Ventilation by Displacement", Proceeding of Roomvent, Stockholm, Sweden.
[2]          Voeltzel, A., 1999, "Dynamic Thermal and Airflow Modeling of Large Highly Glazed Spaces", Doctoral Thesis, University of Lyon, France.
[3]          Inard C., Buty D., "Simulation and Thermal Coupling Between a Radiator and a Room with Zonal Models", Proceedings of Building Simulation, France, pp. 113-17., 1991.
[4]          Wurtz, E., 1999, "Modelisation Tridimensionnelle des Transfert Thermiques et Aerauliques Dans le Batiment en Environnement Oriennte Objet", Doctoral Thesis, Ecole University, France.
[5]          Bouia, H., 1993, "Modelisation Simplifiee d' Ecoulements de Convection Mixte Interne: Application aux Echanges Thermo- Aerauliques dans les Locaux", Doctoral Thesis, University of Poitiers, France.
[6]          Chen, Q., Xu, W. "A Zero- Equation Turbulence Model for Indoor Airflow Simulation", Energy and Buildings. 1998:28(2):137-44.
[7]          Howarth, A.T., 1985, "The Prediction of Air Temperature Variations in Naturally Ventilated Rooms with Convective Heating", Building Service Engineering Research and Technology. pp: 6(4):169-75.
[8]          Lebran, J., Ngendakumana, P., 1987, "Air Circulation Induced by Heating Emitters and Corresponding Heat Exchanger Along the Wall: Test- Room Results and Modeling". Proceedings of Roomvent, Stockholm, Sweden.
[9]          Mussy, M., Wurtz, E., Winkelmann, F., Allard, F., 2001, "Generation of a Zonal Model to Simulate Natural Convection in a Room with a Radiative Convective Heater", Building and Environment, pp: 36(5):58996.
[10]        During, H., 1994, "Consommations Energetiques et Confort Thermique des Locaux Chauffes: Approche par les Modeles Zonaux". These de Doctorat, INSA de Lyon, France.
[11]        Inard, C., Buty, D., "Simulation and Thermal Coupling Between a Radiator and a Room with Zonal Models", Proceedings of Building Simulation. France. pp. 113-17, 1991.
[12]        Gschwind, M., Fonzes, G., Loiseau, P.H., Bezian, J.J., Hasebe, T., Fujita, S., Takeda, L., (1995), "A Zonal Model to Simulate a Room Heated by Gas Heat Pump (GHPT, Proceeding of the 5th International Conference on Air Distribution in Room (Roomvent), Hapan. pp: 61-68.
[13]        Huang, H., Haghighat, F., "An Integrated Zonal Model for predicting indoor airflow, temperature, and VOC distributions", ASHRAE transactions pp:111(1):601-11, 2005.
[14]        Daneshgar E., Azimi A., Bahraynian S., 2015, "Developing inverse air zonal method to identify pollution source properties in inside environment", master's thesis for Shahid chamran ahwaz university, (in Persian)
[15]       De Visscher, A. (2013), “Air Dispersion Modeling. Foundations and Applications”, J.Wiley & Sons, forthcoming.
[16]       Huber, A., Selom F., (1995), wind tunnel simulation review with computational fluid dynamic method, Energy and Buildings, pp: 54-55
Volume 52, Issue 3
September 2021
Pages 423-432
  • Receive Date: 20 November 2019
  • Revise Date: 31 December 2019
  • Accept Date: 15 January 2020
  • First Publish Date: 01 September 2021