Thermal Analysis of Circular Pin-fin with Rectangular Slot at the Center by Forced Convection

Authors: Kavita H. Dhanawade, Hanamant S. Dhanawade, Ajay Kashikar, Shweta Matey, Mahesh Bhadane, Sunny Sarraf

Abstract:

Extended surfaces are commonly used in practice to enhance heat transfer. Most of the engineering problems require high performance heat transfer components with light weight, volumes, accommodating shapes, costs and reliability depending on industrial applications. This paper reports an experimental analysis to investigate heat transfer enhancement by forced convection using different sizes of pin-fin with rectangular slots at the center. The cross sectional area of the oblong duct was 200 mm x 80 mm. The info utilized in performance analysis was obtained experimentally for material, aluminum at 200 Watts heat input varying velocity 1 m/s to 5 m/s. Using the Taguchi experimental design method, optimum design parameters and their levels were analysed. Nusselt number and friction factor were considered as a performance characteristic parameter. An An L₉ (3³) orthogonal array was designated as an experimental proposal. Optimum results were found by experimenting. It is observed that pin-fins with different slots sizes have a better impact on Nusselt Number.

Keywords: Heat transfer coefficient, Nusselt Number, pin-fin, forced convection.

References:

[1] Zan W., Wei L., Zhi-jian S., Rong-hua H., Modeling Natural Convection Heat Transfer from Perforated Plates, Journal of Zhejiang University-Science A, Vol.13, issue-5, pp. 353-360, 2012.
[2] Ali R.K., Heat Transfer Enhancement from Protruding Heat Sources Using Perforated Zone Between the Heat Sources, Applied Thermal Engineering , Vol.29, pp. 2766-2772, 2009.
[3] Ugur Akyol, Bilen K., Heat transfer and thermal performance analysis of a surface with hollow rectangular fins, Applied Thermal Engineering, Vol. 26, pp. 209-216. 2006.
[4] Bilen K, Ugur Akyol, Sinan Yapici, Heat transfer and friction correlations and thermal performance analysis for a finned surface, Energy Conversion and Management, Vol. 42, pp. 1071-1083, 2001.
[5] Sara O. N., Pekdemir T., Yapici S., Ersahan H., Thermal performance analysis for solid and perforated blocks attached on a flat surface in duct flow, Energy Conversion and Management, Vol. 41, pp.1019-1028.,2000.
[6] Sara O. N., Pekdemir T., Yapici S., Yilmaz M., Heat transfer enhancement in a channel flow with perforated rectangular blocks, International Journal of Heat and Fluid Flow, Vol.22, pp. 509-518, 2001.
[7] Bayram. Sahin, A. Demir, Thermal performance analysis and optimum design parameters of heat exchanger having perforated pin-fins, Energy Conversion and Management, Vol.49, pp.1684-1695, 2008.
[8] Bayram Sahin., A. Demir., Performance analysis of a heat exchanger having perforated square fins, Applied Thermal Engineering, Vol. 28, pp. 621-632, 2008.
[9] Shaeri M.R., Yaghoubi M., Thermal enhancement from heat sinks by using perforated fins, Energy conversion and Management, Vol. 50, pp. 1264-1270, 2009.
[10] Shaeri M.R., Yaghoubi M., Jafarpur K, Heat transfer analysis of lateral perforated fin heat sinks, Applied Energy, Vol. 86, pp. 2019-2029, 2009.
[11] Yaghoubi M., Shaeri M.R., Jafarpur K, Three-dimensional numerical laminar convection heat transfer around lateral perforated fins, Computational Thermal Sciences, Vol.1, pp.323-340, 2009.
[12] Sohail R. Reddy., Abas Abdoli., George S., Dulikravich Cesar., C. Pacheco., Genesis Vasquez., Rajesh Jha., Marcelo J. Colaco., Helcio R.B. Orlande, Multi-Objective Optimization of Micro Pin-Fin Arrays for Cooling of High Heat Flux Electronics With a Hot Spot, Heat Transfer Engineering, Taylor Francis , Volume 38, issue 14-15, pp. 1235-1246 . 2017, 13th International Conference on Nanochannels, Microchannels and Minichanles, July 6-9, 2015, San Francisco, California USA.
[13] Sajedi R., Osanloo B., Talati F., Taghilou M., Splitter plate application on the circular and square pin fin heat sinks, Microelectronics Reliability, Vol 62, pp. 91-101, 2016.
[14] Amer AI-Damook, J.I. Summers, N. Kapur, H.M. Thompson, Computational Desigen and Optimisation of Pin Fin Sinks with Rectangular Perforations”, White Rose, university consortium, UK 2016.
[15] Jii Jinn Foo and Chee Seng Tan, Heat transfer enhancement with perforated fin fins subject to impinging flow, International Journal of Mechanical Computational and Manufacturing Research, Vol.1 pp. 56-61, 2012.
[16] Mohamad I. AI-Widyan and Amiad AI-Shaarawi, Numerical investigation of heat transfer enhancement for a perforated fins in natural convection, International Journal of Engineering Research and Applications, Vol. 2, pp. 175-184, 2012.
[17] Sven De Schampheleire, Kathleen De Kerpel, Bernd Ameel, Özer Bağcı, Michel De Paepe Discussion on The Effect of a Fluid Domain Around Fins and Grid Discretization in Buoyancy-Driven Convection, Heat Transfer Engineering, Taylor Francis , Volume 38, Issue 18, pp. 1531-1546, 2017.
[18] Dhanawade K. H., and Dhanawade H. S., Enhancement of Forced Convection Heat Transfer from Fin Arrays with Circular Perforation” IEEE Xplorer, pp. 192-196, 2010.
[19] Dhanawade K., Sunnapwar V., Dhanawade H., Thermal Analysis of Square and Circular Perforated Fin Arrays by Forced Convection, International Journal of Current Engineering and Technology, pp.109-114, 2014.
[20] Dhanawade K., Sunnapwar V., Dhanawade H., Optimization of Design Parameters for Lateral Circular Perforated Fin Arrays under Forced Convection, Heat transfer- Asian Research, Vol.45, pp.30-45, 2016.
[21] Dhanawade K., Sunnapwar V., Dhanawade H., Thermal Analysis of Rectangular Fins with Different Shapes of Lateral Perforations by Forced Convection, Heat Transfer Research, Begell House, Vol. 49, Issue 7, pp. 597-616, 2018.
[22] Ambarish M., Dipankar B., Promod Kumar P., Numerical Investigation on Heat Transfer Enhancement of Heat Sink using Perforated Pinfins with Inline and Staggered Arrangement, Applied Thermal Engineering Volume 125 , Pp 596-616, 2017.
[23] Adem Ç., Turgay K., Gürcan S, Application of Taguchi method for surface roughness and roundness error in drilling of AISI 316 stainless steel, Journal of Mechanical Engineering, Vol. 58, pp. 165-174, 2012.
[24] Moffat R.J, Described in uncertainties in experimental results, Experiments Thermo Fluid Science, Vol. 1 pp. 3-17, 1988.
[25] Frank Kreith, and Marks. Bohn, Principles of Heat Transfer, 5th ed” PWS Publishing Company, 20 Park Plaza, Boston, 1997.