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Research Article

Movement and control of evaporating droplets released from an open surface tank in the push-pull ventilation system

Yi Wang1( ), Yan Zou1, Yang Yang1, Songheng Wu1, Xinyu Zhang1, Xiaofen Ren2
School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China
Institute of Urban Construction, Hebei University of Engineering, Handan, 056038, China
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Abstract

Push-pull ventilation systems are effective local ventilation methods to control airborne contaminants generated in industrial buildings, among which droplets are typical. In this paper, the numerical simulations of water droplets released from an open surface tank into the push-pull flow field are carried out and the effects of ambient relative humidity and the pull-flow velocity on the ventilation system performance are discussed based on the droplet evaporation and movement. It was found that the movement and evaporation of droplets were closely related to the push-pull flow mechanism and the droplet initial diameter. When the control effect was good due to the presence of air closure in the flow field (pull-flow velocity ranging from 1.5 m/s to 3.0 m/s), droplets were unlikely to move away from the closure and the evaporation of droplets smaller than 40 μm was obvious. Whereas when the control effect was poor (pull-flow velocity equaling 1.0 m/s), large droplets still moved around the tank surface but small droplets were subject to dispersing, and in such a case droplets smaller than 60 μm evaporated obviously. Moreover, the effect of ambient relative humidity (ranging from 0 to 80%) on controlling droplets was rather limited and no more than ±6%. In addition, the system could save airflow rate and energy consumption by reducing the pull-flow velocity which was excessive originally in ventilation design. Finally, the paper put forward a new index to evaluate the control effect from another standpoint based on whether the droplets did harm to the environment.

Keywords

dropletpush-pull ventilationflow physiccapture efficiencyopen surface tank

References

 
ACGIH (1992). Industrial Ventilation—A Manual of Recommended Practice, 21st edn. Cincinnati: American Conference of Governmental Industrial Hygienists.
 
WP Battista (1947). Semi-lateral tank ventilation hood controls contamination, cuts costs. Heating Piping and Air Condition, 19: 85-89.
Google Scholar
 
V Betta, F Cascetta, A Palombo (2007). Push-pull ventilation system: A CFD approach for the performance analysis. International Journal of Ambient Energy, 28: 123-134.
Crossref Google Scholar
 
CYH Chao, MP Wan, GN Sze-To (2008). Transport and removal of expiratory droplets in hospital ward environment. Aerosol Science and Technology, 42: 377-394.
Crossref Google Scholar
 
M-J Chern, C-H Ma (2007). Numerical investigation and recommendations for push-pull ventilation systems. Journal of Occupational and Environment Hygiene, 4: 184-197.
Crossref Google Scholar
 
JF Ege, L Silvennan(1950). Design of push-pull exhaust systems. Heating and Ventilation, 10: 73-78.
Google Scholar
 
Fluent (2006). Fluent User's Guide. Canonsburg, PA, USA: ANSYS Inc.
 
MR Flynn, K Ahn, CT Miller (1995). Three-dimensional finite-element simulation of a turbulent push-pull ventilation system. Annals of Occupational Hygiene, 39: 573-589.
Crossref Google Scholar
 
GC Gong, JJ Jiao, SN Xie, GW Zhang, GQ Li, YK Liu, Q Zhang (2010). Study of the condensation prevention of paper-making plant envelope under high temperature and humidity environment in winter. Journal of Hunan University(Nature Science), 37(4): 17-21.(in Chinese)
Google Scholar
 
GM Hama (1957). Supply and exhaust ventilation for the control of metal pickling operations. American Industrial Hygiene Association Quarterly, 18: 214-217.
Crossref Google Scholar
 
PY Hamey (1982). The evaporation of airborne droplets. Master Thesis, Granfield Institute of Technology, UK.
 
RJ Heinsohn (1991). Industrial Ventilation: Engineering Principles. New York: John Wiley & Sons.
 
RF Huang, SY Lin, SY Jan, RH Hsieh, YK Chen, CW Chen, WY Yeh, CP Chang, TS Shih, CC Chen (2005). Aerodynamic characteristics and design guidelines of push-pull ventilation systems. The Annals of Occupational Hygiene, 49: 1-15.
Google Scholar
 
Y Huang, XY Gui, XQ Meng, Y Zhang, YL Xu (2008). Research on stressed analysis and moving trace on dust particles in air flow of screening shop. Coal Engineering, 2008(8): 88-90. (in Chinese)
Google Scholar
 
RT Hughes, DJ Huebener (1982). Development of Push-Pull Ventilation Criteria. Cincinnati: National Institute for Occupational Safety and Health.
 
DJ Huebener, RT Hughes (1985). Development of push-pull ventilation. American Industrial Hygiene Association Journal, 46: 262-267.
Crossref Google Scholar
 
F Jing (2000). Theoretical analysis and application of the push-pull airflow. Master Thesis, Henan University of Technology. (in Chinese)
 
J Kukkonen, T Vesala, M Kulmala (1989). The interdependence of evaporation and settling for airborne freely falling droplets. Journal of Aerosol Science, 20: 749-763.
Crossref Google Scholar
 
XT Li, B Zhao, XL Shao, H Cai (2011). Ventilation of Buildings, 2nd edn. Beijing: China Machine Press. (in Chinese)
 
Y Li, PV Nielsen (2011). CFD and ventilation research. Indoor Air, 21: 442-453.
Crossref Google Scholar
 
ZW Lian (2006). Fundamentals and Equipment of Heat and Mass Transfer. Beijing: China Architecture and Building Press. (in Chinese)
 
BS Malin (1945). Practical pointers on industrial exhaust systems. Heating and Ventilation, 42: 75-82.
Google Scholar
 
F Marzal, E González, A Miñana, A Baeza (2002a). Influence of push element geometry on the capture efficiency of push-pull ventilation systems in surface treatment tanks. The Annals of Occupational Hygiene, 46: 383-393.
Google Scholar
 
F Marzal, E González, A Miñana, A Baeza (2002b). Determination and interpretation of total and transversal linear efficiencies in push-pull ventilation systems for open surface tanks. The Annals of Occupational Hygiene, 46: 629-635.
Google Scholar
 
F Marzal, E González, A Miñana, A Baeza (2003). Visualization of airflows in push-pull ventilation systems applied to surface treatment tanks. American Industrial Hygiene Association Journal, 64: 455-460.
Crossref Google Scholar
 
H Montazeri, B Blocken, JLM Hensen (2015a). CFD analysis of the impact of physical parameters on evaporative cooling by a mist spray system. Applied Thermal Engineering, 75: 608-622.
Crossref Google Scholar
 
H Montazeri, B Blocken, JLM Hensen (2015b). Evaporative cooling by water spray systems: CFD simulation, experimental validation and sensitivity analysis. Building and Environment, 83: 129-141.
Crossref Google Scholar
 
M Robinson, DB Ingham (1996a). Recommendations for the design of push-pull ventilation systems for open surface tanks. The Annals of Occupational Hygiene, 40: 693-704.
Crossref Google Scholar
 
M Robinson, DB Ingham (1996b). Numerical modeling of the flow patterns induced by a push-pull ventilation system. The Annals of Occupational Hygiene, 40: 293-310.
Crossref Google Scholar
 
M Robinson, DB Ingham (2003). Design and operating parameters for push-pull ventilation of open surface tanks. International Journal of Energy Research, 27: 757-770.
Crossref Google Scholar
 
R Rota, G Nano, L Canossa (2001). Design guidelines for push-pull ventilation systems through computational fluid dynamics modeling. American Industrial Hygiene Association, 62: 141-148.
Crossref Google Scholar
 
O Rouaud, M Havet (2002). Computation of the airflow in a pilot scale clean room using k-ε turbulence models. International Journal of Refrigeration, 25: 351-361.
Crossref Google Scholar
 
JH Seinfeld, SN Pandis (2006). Atmospheric Chemistry and Physics: From Air Pollution to Climate Change, 2nd edn. Chapter 9: Dynamics of single aerosol particles (pp. 407-411). New York: John Wiley & Sons.
Google Scholar
 
K Steenland (1997). Laryngeal cancer incidence among workers exposed to acid mists. Cancer Causes and Control, 8: 34-38.
Crossref Google Scholar
 
YJ Sun, HG Shen (2010). Industrial Ventilation, 4th edn. Beijing: China Architecture and Building Press. (in Chinese)
 
DJ Tritton (1988). Physical Fluid Flows, 2nd edn. New York: Oxford University Press.
 
MP Wan, CYH Chao (2007). Transport characteristics of expiratory droplets and droplet nuclei in indoor environments with different ventilation airflow patterns. Journal of Biomechanical Engineering, 129: 341-353.
Crossref Google Scholar
 
SI Watson, JR Cain, H Cowie, JW Cherrie (2001). Development of a push-pull ventilation system to control solder fume. The Annals of Occupational Hygiene, 45: 669-676.
Crossref Google Scholar
 
X Xie, Y Li, ATY Chwang, PL Ho, WH Seto (2007). How far droplets can move in indoor environments-revisiting the Wells evaporation-falling curve. Indoor Air, 17: 211-225.
Crossref Google Scholar
 
J Xu (2007). Machine Design Manual of Heating Ventilation and Air-Conditioning. Shanghai: Tongji University Press. (in Chinese)
 
Q Zhang (2010). Research of plain carbon steel pickling acid-mist dressing. Master Thesis, Northeastern University, China. (in Chinese)
 
Z Zhang, ZL Xie (2001). Numerical simulation of fluid-solid two-phase flows. Journal of Chemical Industry and Engineering, 52(1): 1-12.
Google Scholar
 
Y Zhou, Y Wang (2011). Calculation domain and boundary conditions for push-pull ventilation. Advanced Materials Research, 374-377: 419-424.
Crossref Google Scholar
Building Simulation
Volume 9 Issue 4,
August 2016
Pages 443-457
DOI: 10.1007/s12273-016-0276-5
Cite this article:
Wang Y, Zou Y, Yang Y, et al. Movement and control of evaporating droplets released from an open surface tank in the push-pull ventilation system. Building Simulation, 2016, 9(4): 443-457. https://doi.org/10.1007/s12273-016-0276-5

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Received: 20 October 2015
Revised: 06 December 2015
Accepted: 07 January 2016
Published: 03 February 2016
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016
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