Journal of Computational & Applied Research in Mechanical Engineering (JCARME)

Document Type : Research Paper

Authors

¹ shahid rajaee teacher training university

² SRTTU

³ Assistant Professor, Shahid Rajaee Teacher Training University, Department of Mechanical Engineering

https://doi.org/10.22061/jcarme.2019.3919.1458

Abstract

The shape of the air flow in the interior is heavily influenced by the air distribution system and the way air enters and exits. By numerically simulating flow by computational fluid dynamics, one can determine the flow pattern and temperature distribution and, with the help of the results, provide an optimal design of the air conditioning system. In this study, a chamber was first constructed and the temperature distribution inside it was measured. There was a fan installed at the back of the chamber for drainage. At the chamber entrance, three inlet for entering the flow were considered. The air from the middle inlet was heated by a heater. To prevent heat loss, the body of the enclosure was insulated. Several temperature sensors were installed at certain positions of the chamber for temperature measurement. Using Fluent software, the model of a full-sized chamber was created. Meshing is a hybrid and was used as a boundary layer Mesh. The inlet and outlet temperature of the chamber and the air output rates as boundary conditions were used in the simulation. Numerical analysis for K-ε and K-ω turbulence models was performed and different wall conditions were investigated. The numerical simulation results were in good agreement with the measurement results. Using the K-ε turbulence model with a scalable wall function had a better accuracy than other models. Changes in velocity and temperature were presented in graphs and contours at different positions of the compartment.

Graphical Abstract

Keywords

dor

20.1001.1.22287922.2019.9.1.8.6

Main Subjects

Computational Fluid Dynamics (CFD)

References

[1] E. Lee, C. Feigly, and J. Khan, “An investigation of air inlet velocity in simulating the dispersion of indoor contaminants via computational fluid dynamics”, Annals Occupational Hygiene, Vol. 46, pp. 701–712, (2002).

[2] L. Yuguo, and A. Delsante, “Derivation of capture efficiency of kitchen range hoods in a confined space”, Building in Environment, Vol. 31, pp. 461–468, (1996).

[3] U. Madsen, N.O. Breum, and P.V. Nielsen, “Local exhaust ventilation—a numerical and experimental study of capture efficiency”, Building and Environment, Vol. 29, pp. 319–323, (1994).

[4] E. Bustamante, E. Guijarro, F.J. García-Diego, S. Balasch, A.G. Torres, “Multi sensor system for isotemporal measurements to assess indoor climatic conditions”, poultry farms Journal-sensors, Vol. 12, pp. 5752–5774,(2012).

[5] I. Lee, S. Sase, and S. Sung, “Evaluation of CFD accuracy for the ventilation study of a naturally ventilated broiler house”. Japan Agricultural Research Quarterly, Vol. 41, pp. 53-64, (2007).

[6] I. Seo, I. Lee, O. K. Moon, H. T. Kim, H. S. Hwang, and S. Hong, “Improvement of the ventilation system of a naturally ventilated broiler house in the cold season using computational simulations”. Biosystems Engineering, Vol. 104, pp. 106-117, (2009).

[7] I. Lee, S. Sase, H. Han, H. Hong, “Ventilation design for a chick incubator using computational fluid dynamics”. Japan Agricultural Research Quarterly, Vol. 43, pp. 227-237, (2009).

[8] T. Bartzanas, C. Kittas, A. A. Sapounas, C. H. Nikita-Martzopoulou, “Analysis of airflow through experimental rural buildings: sensitivity to turbulence models”. Biosystems Engineering, Vol. 97, pp. 229-239, (2007).

[9] V. G. Blanes-Vidal, S. Balasch, A. G. Torres, “Application of computational fluid dynamics to the prediction of airflow in a mechanically ventilated commercial poultry building”. Biosystems Engineering, Vol. 100, pp. 105-116, (2008).

[10] I. Seo, I. Lee, O. Moon, S. Honga, H. Hwanga, j. P. Bitog, K. Kwona and Z. Yec, “Modelling of internal environmental conditions in a full-scale commercial pig house containing animals”. Biosystems Engineering, Vol. 111, pp. 91-106, (2012).

[11] J. A. Saraz, M. A. Martins, K. S. Rocha, N. S. Machado, and H. J. Velasques, “Use of computational fluid dynamics to simulate temperature distribution in broiler houses with negative and positive tunnel type ventilation systems”. Actualidad & Divulgacion Cientifica, Vol. 16, pp. 159-166, (2013).

[12] E. Bustamante, F. Garcia-Diego, S. Calvet, F. Estelles, P. Beltran, and A. Hospitaller, “Exploring ventilation efficiency in poultry buildings: the validation of computational fluid dynamics (CFD) in a cross-mechanically ventilated broiler farm”. Energies, Vol. 6, pp. 2605-2623, (2013).

[13] L. Rong, P. V. Nielsen, B. Bjerg, and G. Zhang, “Summary of best guidelines and validation of CFD modeling in livestock buildings to ensure prediction quality”. Computers and Electronics in Agriculture, Vol. 121, pp. 180-190, (2016).

[14] Y. Li, M. Sandberg, and L. Fuchs, “Vertical temperature profiles in rooms ventilated by displacement: full -scale measurement and nodal modelling”. Indoor Air, Vol. 2, pp225-243, 1992.

[15] B. Merci, P. Vandevelde, “Experimental study of natural roof ventilation in full-scale enclosure fire tests in a small compartment”. Fire Safety Journal, Vol. 42, pp. 523-535, (2007).

[16] K. Lim, and C. Lee, “A numerical study on the characteristics of flow field, temperature and concentration distribution according to changing the shape of separation plate of kitchen hood system”, Energy and Buildings, Vol. 40, pp.175–184, (2008).

[17] J. Simon, and P. Haves, “An experimental study of air flow and temperature distribution in a room with displacement ventilation and a chilled ceiling”, Building and Environment, Vol. 59, pp. 358-368, (2013).

[18] J. H. Kang, and S. J. Lee, “Improvement of natural ventilation in a large factory building using a louver ventilator”, Building and Environment, Vol. 43, pp. 2132-2141, (2008).

[19] S. Dalley, C. Baker, X. Yang, P. Kettlewell, and R. Hoxey, “An Investigation of the Aerodynamic and Ventilation Characteristics of Poultry Transport Vehicles: Part 3, Internal Flow Field Calculations. Journal of Agricultural Engineering Research, Journal of Agricultural Engineering Research, Vol. 65, pp. 115-127, (1996).

[20] M. Kacira, T. Short, and R. Stowell, “A Cfd Evaluation of Naturally Ventilated, Multi-Span, Sawtooth Greenhouses”. Contribution to journal › Article, Vol. 41, pp. 833-836, (1998).

[21] V. G. Blanes-Vidal, S. Balasch, and A. G. Torres, “Application of computational fluid dynamics to the prediction of airflow in a mechanically ventilated commercial poultry building”. Biosystems Engineering, Vol. 100, pp. 105-116, (2008).

[22] E. Bustamante, F. Garcia-Diego, S. Calvet, F. Estelles, P. Beltran, and A. Hospitaller, “Exploring ventilation efficiency in poultry buildings: the validation of computational fluid dynamics (CFD) in a cross-mechanically ventilated broiler farm”, Energies, Vol. 6, pp. 2605-2623, (2013).

[23] A. Mistriotis, G. P. A. Bot, P. Picuno and G. Scarascia-Mugnozza, “Analysis of the efficiency of greenhouse ventilation using computational fluid dynamics”. Agricultural and Forest Meteorology, Vol. 85, pp. 217-228, (1997).

[24] F. Gerdes, and D. Olivari, “Analysis of pollutant dispersion in an urban street canyon”. Journal of Wind Engineering and Industrial Aerodynamics, Vol. 82, pp. 105-124, (1999).

[25] A. A. Sapounas, H. J. C. van Dooren and M. C. J. Smits, “Natural ventilation of commercial dairy cow houses: simulating the effect of roof shape using CFD”. International Conference of Agricultural Engineering. AGENG-2012, Valencia, Spain.

[26] A. P. Garcia Sagrado, J. van Beeck, P. Rambaud and D. Olivari, “Numerical and experimental modelling of pollutant dispersion in a street canyon”. Journal of Wind Engineering and Industrial Aerodynamics, Vol. 90, pp. 321-339, (2002).

[27] T. Bartzanas, C. Kittas, A. A. Sapounas and C. Nikita-Martzopoulou, “Analysis of airflow through experimental rural buildings: Sensitivity to turbulence models”. Biosystems Engineering, Vol. 97, pp. 229-239, (2007).

[28] G. M. Stavrakakis, M. K. Koukou, M. G. Vrachopoulos and N. C. Markatos, “Natural cross-ventilation in buildings: Building-scale experiments, numerical simulation and thermal comfort evaluation”. Energy and Buildings, Vol. 40, pp. 1666-1681, (2008).

[29] C. Gilkeson, H. Thompson, M. Wilson, and P. Gaskell, “Quantifying passive ventilation within small livestock trailers using Computational Fluid Dynamics”. Computers and Electronics in Agriculture, Vol. 124, pp. 84-99, (2016).

[30] C. Roberto, B. Ricardo, and G. Cristiane, “Simulation of ventilation systems in a protected environment using computational fluid dynamics”, Journal of the Brazilian Association of Agricultural Engineering, Vol. 37, pp. 414-425, (2017).

[31] V. Rodrigues, L. Sabino, and N. Roberto, “Application of computational fluid dynamics on a study in swine facilities with mechanical ventilation system”, Scientia Agricola, Vol. 75, pp. 173-183, (2018).

[32] E.Statsenko, A.Ostrovaia and A.Pigurin, “Temperature and velocity conditions of air flow in vertical channel of hinged ventilated facade of a multistory building”, E3S Web of Conferences, Vol. 33, pp. 02038 (2018).

[33] M. P. Wan, C. Y. Chao, “Numerical and experimental study of velocity and temperature characteristics in a ventilated enclosure with underfloor ventilation systems”, Indoor Air-black well publishing, Vol. 15, pp. 342–355 (2005).

Name *

Email Address *

Affiliation *

Comments *

Security Code *

CAPTCHA Image