Thermal performance and pressure drop of different pin-fin geometries

Year 2014, , 13 - 20, 31.12.2014

Isak Kotcioglu Gokhan Omeroglu Sinan Caliskan

https://doi.org/10.17350/HJSE19030000003

Cited By: 7

Abstract

The purpose of this study is to show the performance of hexagonal, square and cylindrical pin-fin arrays in improving heat transfer. In the present study, the thermal performance and pressure drop of the pin-fin heat exchanger are studied. The heat exchanger consists of cylindrical, hexagonal and square pin-fins. These types of pin-fins are capable of producing beneficial effects in transport enhancement and flow control. The pin-fins were arranged in an in-line manner. The relative longitudinal pitch SL/D=2 , and the relative transverse pitch were kept constant ST/D=2 . Air and water are used as working fluids in shell side and tube side, respectively. The inlet temperatures of air are between 50 and 90° C. The cold water entering the heat exchanger at the inner channel flows across the fin and flows out at the inner channel. Such pin-fins show potential for enhancing the heat transfer rate in pin-fin cross flow heat exchangers

Keywords

Thermal performance, Pressure drop, Cylindrical, Hexagonal and square ins

References

• 1. Jeng TM, Tzeng SC. Pressure drop and heat transfer of square pin–fin arrays in in-line and staggered arrangements. International Journal of Heat and Mass Transfer 50 (2007) 2364-2375.
• 2. Vanfossen GJ. Heat transfer coefficients for staggered arrays of short pin–fins. Transactions of ASME, Journal of Heat Transfer 104 (1982) 268–274.
• 3. Grannis VB, Sparrow EM. Numerical simulation of fluid flow through an array of diamond-shaped pin fins. Numerical Heat Transfer Applications (Part A). 19 (1991) 381–403.
• 4. Yang KS, Chu WH, Chen IY, Wang CC. A comparative study of the airside performance of heat sinks having pin fin configurations. International Journal of Heat and Mass Transfer 50 (2007) 661–4667.
• 5. Sparrow EM, Larson ED. Heat transfer from pin-fins situated in an oncoming longitudinal flow which turns to cross-flow. International Journal of Heat and Mass Transfer 25 (1982) 603-614.
• 6. Yakut K, Alemdaroglu N, Kotcioglu I, Celik C. Experimental investigation of thermal resistance of a heat sink with hexagonal fins. Applied Thermal Engineering 26 (2006) 2262-2271.
• 7. Chen Z, Li Q, Meier D, Warnecke HJ. Convective heat transfer and pressure loss in rectangular ducts with drop-shaped pin fins. Heat and Mass Transfer 33 (1997) 219-224.
• 8. Ricci R, Montelpare S. An experimental IR thermographic method for the evaluation of the heat transfer coefficient of liquid-cooled short pin fins arranged in line. Experimental Thermal and Fluid Science 30 (2006) 381–391.
• 9. Won SY, Mahmood GI, Ligrani PM., Spatially-resolved heat transfer and flow structure in a rectangular channel with pin fins. International Journal of Heat and Mass Transfer 47 (2004) 1731-1743.
• 10. Hwang JJ, Lu CC. Lateral-flow effect on end wall heat transfer and pressure drop in a pin-fin trapezoidal duct of various pin shapes. ASME Paper No. 2000-GT-232, 2000.
• 11. Wang CC, Lo J, Lin YT, Wie CS. Flow visualization of annular and delta winglet vortex generators in fin-and-tube heat exchanger application. International Journal of Heat and Mass Transfer 45 (2002) 3803-3815.
• 12. Kotcioglu I, Caliskan S, Baskaya S. Experimental study on the heat transfer and pressure drop of a cross-flow heat exchanger with different pin–fin arrays. Heat and Mass Transfer 47 (2011) 1133–1142.
• 13. Tahat MA, Babus’Haq RF, Probert SD. Forced steady-state convections from pin–fin arrays. Applied Energy 48 (1994) 335-351.
• 14. El-Sayed SA, Mohamed MS, Abdel-latif AM, Abouda AE. Investigation of turbulent heat transfer and fluid flow in longitudinal rectangular-fin arrays of different geometries and shrouded fin array. Experimental Thermal and Fluid Science 26 (2002) 879-900.
• 15. Chen TY, Shu TH. Flow structures and heat-transfer characteristics in fan flows with and without delta-wing vortex generators. Experimental Thermal and Fluid Science 28 (2003) 273-282.
• 16. Jubran BA, Al-Salaymeh AS. Heat-transfer enhancement in electronic modules using ribs and ‘‘film cooling-like’’ techniques. International Journal of Heat and Fluid Flow 17 (1996) 148–154.
• 17. Kline SJ, McClinctock FA. Describing uncertainties in singlesample experiments. Mechanical Engineering 75 (1953) 3–8