Investigation of Fin Spacing for Heat Transfer Enhancement in Cross Flow Over Tubes Between Two Parallel Plates

Ahmad Nurye Oumer, Amer Farhan Alias

Abstract

This research explains the investigation of fin spacing for heat transfer enhancement in the finned tube heat exchanger. The objective of this paper is to recommend the optimum fin spacing for heat transfer enhancement. Three different types of tube and spacing are identified through the simulation from Ansys software. The data between simulation using Ansys Fluent and published literature were being compared. Graph of total pressure, Nusselt number and total temperature have been plotted to make the comparison. Result obtained showed that were a bigger agreement between the simulation and published literature for both types of the tube which are circular and elliptic. From the analysis, there were considered two types of arrangement for the different types of tube. From that, the aligned arrangement is the best for heat transfer enhancement compared to the staggered. For the effect of spacing, there was three spacing which is 1.7 mm, 1.8 mm, and 2.0 mm spacing with velocity and the total heat flux is set to be constant (v =1.4 m/s; q = 500 W/m2). For the circular tube, it can be seen that the wider of the fin spacing gave the best heat transfer enhancement in the heat exchanger. Different from the circular which is 1.8 mm spacing is the best for heat transfer enhancement. Other types of tube are a flat surface which is comparing with the variations of Nu vs Re with different heat flux. Then, the result showed that as the Re is increased the Nu will also increase. In the other side, it is recommended for future work to do the real model dimension followed to import to the Ansys instead of assuming the model is symmetrical.

Keywords

Fin spacing, Heat transfer, Heat Exchanger, Cross Flow, Parallel Plates

Article Metrics

Abstract view : 142 times
PDF view : 120 times

Full Text:

PDF

References

Industrial Heat Exchangers: What They Are, How They Work, and Why They Are Needed. 2014 12 July 2014; http://setxind.com/downstream/industrial-heat-exchangers-what-they-are-how-they-work-and-why-they-are-needed/.

Wais, P., . 2012: p. 343-366.

Hansen, A.M., . 2008: p. 89.

Yang, D.-K., K.-S. Lee, and S. Song, Fin spacing optimization of a fin-tube heat exchanger under frosting conditions. International Journal of Heat and Mass Transfer, 2006. 49(15-16): p. 2619-2625.

Hu, W., et al., The optimum fin spacing of circular tube bank fin heat exchanger with vortex generators. Heat and Mass Transfer, 2013. 49(9): p. 1271-1285.

Huang, C.-H., I.C. Yuan, and H. Ay, An experimental study in determining the local heat transfer coefficients for the plate finned-tube heat exchangers. International Journal of Heat and Mass Transfer, 2009. 52(21-22): p. 4883-4893.

Mahanta, P., et al., The effect of fin spacing and material on the performance of a heat sink with circular pin fins. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2010. 224(1): p. 35-46.

A. M. Mobarak, A. M. Attya, and A.Z. Aly, . 1993: p. 185-190.

Gholami, A.A., M.A. Wahid, and H.A. Mohammed, Heat transfer enhancement and pressure drop for fin-and-tube compact heat exchangers with wavy rectangular winglet-type vortex generators. International Communications in Heat and Mass Transfer, 2014. 54: p. 132-140.

Sérgio Nascimento Bordalo and Francisco Eduardo Mourão Saboya, Pressure Drop Coefficients for Elliptic and Circular Sections in One, Two and Three-Row Arrangements of Plate Fin and Tube Heat Exchangers, Journal of the Brazilian Society of Mechanical Sciences, J. Braz. Soc. Mech. Sci. vol.21 no.4 Rio de Janeiro Dec. 1999

Tahseen Ahmad Tahseen, M. Ishak, and M. M. Rahman, An Experimental Study Air Flow and Heat Transfer Over Inline Flat Tube Bank, International Conference on Mechanical Engineering Research (ICMER2013), 1-3 July 2013

Refbacks

  • There are currently no refbacks.