A simplified steady-state model for air,water and steam curtains |
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| Authors: | Christian Diaz-Ovalle Richart Vazquez-Roman Raul Lesso-Arroyo M Sam Mannan |
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| Institution: | 1. Departamento de Ingeniería, Instituto Tecnológico de Roque, Km 8.0 Carretera Celaya-Juventino Rosas, Celaya, Guanajuato 38110, Mexico;2. Instituto Tecnológico de Celaya, Departamento de Ingeniería Química, Av. Tecnológico s/n, Celaya, Gto., CP 38010, Mexico;3. Instituto Tecnológico de Celaya, Departamento de Ingeniería Mecánica, Av. Tecnológico s/n, Celaya, Gto., CP 38010, Mexico;4. Mary Kay O''Connor Process Safety Center, Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843-3122, USA;1. Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University, Hefei, China;2. School of Science, Tianjin University of Technology and Education, Tianjin, China;1. Reaction and Chemical Engineering Laboratory (LRGP), University of Lorraine, UPR 33 49 CNRS, 1 Rue Grandville, BP 20451, 54001 Nancy, France;2. Mechanical Engineering Department, Universidad de los Andes, Carrera 1 Este 19A 40, Bogotá, Colombia;3. Chemical Engineering Department, Universidad de los Andes, Carrera 1 Este 19A 40, Bogotá, Colombia;1. Environmental Research Laboratory, National Centre for Scientific Research Demokritos, 15310 Aghia Paraskevi, Attikis, Greece;2. Department of Process Analysis and Plant Design, School of Chemical Engineering, National Technical University of Athens, Heroon Polytechniou 9, 15780 Zografou, Greece;3. Department of Mechanical Engineering, University of Western Macedonia, Parko Agiou Dimitriou, West Macedonia, 50100 Kozani, Greece;1. Department of Chemical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia;2. Engineering School, Sun Yat-Sen University, Guangzhou 510006, China;1. School of Civil Engineering, Hefei University of Technology, Hefei 230009, China;2. Environmental Engineering Program, University of Northern British Columbia, Prince George, Bristish Columbia, Canada;1. Department of Chemical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia;2. Engineering School, Sun Yat-Sen University, Guangzhou 510006, China |
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| Abstract: | Curtain mitigation systems are modeled here since they have experimentally shown their efficiency in reducing the concentration of certain toxic gases within dense gas clouds. Air, water and steam are analyzed in a model as the physical barriers to decrease the gas concentration. The model, developed for a steady-state mitigation process, is based on the mass, energy and momentum conservation laws. Concentration estimations during the dispersion before and after the mitigation are performed with a SLAB type model. A sensitivity analysis for each model is given to detect which variables have bigger effects. A release of chlorine is used as an example and the results are calculated in a prototype developed in Visual C++, where the model is solved using the Runge–Kutta 4th order method. The results include the effects of composition, speed, temperature and height of the releasing point as well as a comparison with CFD simulations. The proposed model is simplified and it cannot reproduce eddy effects but it is fast and robust enough. The model provides a set of equations that can be used in numerical problems where explicit derivatives are required, e.g. optimizations procedures. |
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