CFD simulation of local exhaust ventilation for aviation fire-test lab
About this article
DOI:
https://doi.org/10.14419/ijet.v7i4.13.21353Keywords:
ventilation, CFD, simulation, local exhaust ventilation, indoor air quality.Abstract
Excellent indoor air quality in an enclosed area has always become a major safety aspect in designing a building. Issues with regards to circulation of air and exhaust system must be first resolved before the said building can be used for any purposes. The goal of this study is to identify ways to improve air quality in the aviation fire test room at the Propulsion Laboratory that is located in Universiti Putra Malaysia (UPM), Selangor, Malaysia. A computational fluid dynamics (CFD) method was employed to predict the air contaminant inside the lab. When performing the activities, the indoor air quality have to be ensure circulated and ventilated in the lab. Using a mechanical fans and natural ventilation are a traditional method to provide indoor air quality into the propulsion. Whereby, this method may not be enough to provide the required indoor air quality for specific aviation fire-test setup. Such labs may suffer from increasing air contaminant based on the improper and irregular air distribution. A grid independent test (GIT) was done to reduce the effects of meshing on the results was carried out to estimate the discretization error. Computational fluid dynamic (CFD) method was carried out to identify a suitable ventilation system that would result in the greatest improvement in the indoor air quality (IAQ) inside the lab. The results of using the CFD simulation show that installing Local Exhaust Ventilation (LEV) at the lab could significantly improve the IAQ inside the lab. The airflow increase by 84% and the CO, CO2 and NO reduce by 84%, 89 and 81%, respectively. Improvement of the IAQ by increasing the airflow and reducing in the air CO, CO2, and NO, which can be considered as very significant achievement.
References
Klepeis NE, Nelson WC, Ott WR, Robinson JP, Tsang AM, Switzer P, Behar JV, Hern SC & Engelmann WH (2001), The National Human Activity Pattern Survey (NHAPS): a resource for assessing exposure to environmental pollutants. Journal of Exposure Science and Environmental Epidemiology 11(3), 231
Heiselberg P, Murakami S & Roulet C (1998), Ventilation of large spaces in buildings. Final Report IEA Annex
Cao G, Awbi H, Yao R, Fan Y, Sirén K, Kosonen R & Zhang JJ (2014), A review of the performance of different ventilation and airflow distribution systems in buildings. Building and Environment 73, 171-186
Elzaidabi AAM (2009). Low energy, wind catcher assisted indirect-evaporative cooling system for building applications. University of Nottingham
Abdullah AH (2007), A study on thermal environment performance in atria in the tropics with special reference to Malaysia. Herriot-Watt University
View more references (37)
Wouters P, Heijmans N, Delmotte C & Vandaele L (1999), Classification of hybrid ventilation concepts. IEA Annex.
Kubota T, Chyee DTH & Ahmad S (2009), The effects of night ventilation technique on indoor thermal environment for residential buildings in hot-humid climate of Malaysia. Energy and Buildings 41(8), 829-839
Rahman AMA, Khalid HL & Yusup Y (2011), Optimizing wind power for energy efficient building design in tropical hot-humid climate of Malaysia. Journal of Sustainable Development 4(2), 217
Hussein I, Rahman M & Maria T (2009), Field studies on thermal comfort of air-conditioned and non air-conditioned buildings in Malaysia. 3rd International Conference on Energy and Environment
Raja I, Nicol J, McCartney K & Humphreys M (2001), Thermal comfort: use of controls in naturally ventilated buildings. Energy and Buildings 33(3), 235-244
Zhai Y, Zhang H, Zhang Y, Pasut W, Arens E & Meng Q (2013), Comfort under personally controlled air movement in warm and humid environments. Building and Environment 65, 109-117
Wong NH, Song J & Istiadji A (2006), A study of the effectiveness of mechanical ventilation systems of a hawker center in Singapore using CFD simulations. Building and Environment 41(6), 726-733
Lee S & Chang M (2000), Indoor and outdoor air quality investigation at schools in Hong Kong. Chemosphere 41, 109-113
Khedari J, Yamtraipat N, Pratintong N & Hirunlabh J (2000), Thailand ventilation comfort chart. Energy and Buildings 32(3), 245-249
Atthajariyakul S & Lertsatittanakorn C (2008), Small fan assisted air conditioner for thermal comfort and energy saving in Thailand. Energy Conversion and Management 49(10), 2499-2504
Sekhar S (2005), Space temperature difference, cooling coil and fan—energy and indoor air quality issues revisited. Energy and Buildings 37(1), 49-54
Al-Homoud MS, Abdou AA & Budaiwi IM (2009), Assessment of monitored energy use and thermal comfort conditions in mosques in hot-humid climates. Energy and Buildings 41(6), 607-614
Chow W, Fung W & Wong L (2002), Preliminary studies on a new method for assessing ventilation in large spaces. Building and Environment 37(2), 145-152
Chen Q (2009), Ventilation performance prediction for buildings: A method overview and recent applications. Building and Environment 44(4), 848-858
Hurnik M, Blaszczok M & Popiolek Z (2015), Air distribution measurement in a room with a sidewall jet: A 3D benchmark test for CFD validation. Building and Environment 93(2), 319-330
van Hooff T, Blocken B, Aanen L & Bronsema B (2011), A venturi-shaped roof for wind-induced natural ventilation of buildings: wind tunnel and CFD evaluation of different design configurations. Building and Environment 46(9), 1797-1807
Coffey C & Hunt G (2007), Ventilation effectiveness measures based on heat removal: Part 2. Application to natural ventilation flows. Building and environment 42(6), 2249-2262
Fitzgerald SD & Woods AW (2008), The influence of stacks on flow patterns and stratification associated with natural ventilation. Building and Environment 43(10), 1719-1733
Ji Y, Cook M & Hanby V (2007), CFD modelling of natural displacement ventilation in an enclosure connected to an atrium. Building and Environment 42(3), 1158-1172
Juárez JO, Hinojosa JF, Xamán JP & Tello MP (2011), Numerical study of natural convection in an open cavity considering temperature-dependent fluid properties. International Journal of Thermal Sciences 50(11), 2184-2197
Rajagopalan P & Luther MB (2013), Thermal and ventilation performance of a naturally ventilated sports hall within an aquatic centre. Energy and Buildings 58, 111-122
Hajdukiewicz M, Geron M & Keane MM (2013), Calibrated CFD simulation to evaluate thermal comfort in a highly-glazed naturally ventilated room. Building and Environment 70, 73-89
Gilani S, Montazeri H & Blocken B (2013), CFD simulation of temperature stratification for a building space: validation and sensitivity analysis. 13th Conference of International Building Performance Simulation Association
Zhou J, Vicario U, Tchounwou PB, Abdelghani AA, Ahmad F, Allen KJ & Arsanjani JJ (2004), Journal Browser. International Journal of Environmental Research and Public Health 1
Hess-Kosa K (2016), Indoor air quality: the latest sampling and analytical methods. CRC Press
Anon. (2000), NIOSH pocket guide to chemical hazards. DIANE Publishing
Charles KE, Magee R, Won D & Lusztyk E (2005), Indoor air quality guidelines and standards. Institute for Research in Construction, National Research Council Canada
Anon. (2000), Air quality guidelines for Europe.
Anon. (2013), Standard 55-2013: thermal environmental conditions for human occupancy. ASHRAE
Axley JW (2001), Application of natural ventilation for US commercial buildings–climate suitability, design strategies and methods, modeling studies. Gaithersburg, MD, NIST
Kim G, Schaefer L, Lim TS & Kim JT (2013), Thermal comfort prediction of an underfloor air distribution system in a large indoor environment. Energy and Buildings 64, 323-331
Nielsen PV, Allard F, Awbi HB, Davidson L & Schälin A (2007), Computational fluid dynamics in ventilation design. International Journal of Ventilation 6(3), 291-293
Ho SH, Rosario L & Rahman MM (2009), Three-dimensional analysis for hospital operating room thermal comfort and contaminant removal. Applied Thermal Engineering 29(10), 2080-2092
Setaih K, Hamza N, Mohammed M, Dudek S & Townshend T (2014), CFD modeling as a tool for assessing outdoor thermal comfort conditions in urban settings in hot arid climates. ITcon
Villafruela J, Olmedo I, de Adana MR, Méndez C & Nielsen PV (2013), CFD analysis of the human exhalation flow using different boundary conditions and ventilation strategies. Building and Environment 62, 191-200
Anon. (2011), Fluent User's Manual. ANSYS Inc.
Franke J, Hellsten A, Schlunzen H & Carissimo B (2007), The Best Practise Guideline for the CFD simulation of flows in the urban environment. 5th International Symposium on Computational Wind Engineering