Experimental investigation of convective heat transfer and pressure loss in a round tube fitted with circular-ring turbulators

International Communications in Heat and Mass Transfer

Volumn 37, Issue 5, 2010, Pages 568-574

  Kongkaitpaiboon, V ^a   Nanan, K ^a   Eiamsa ard, S ^a  

^a MAHANAKORN UNIVERSITY OF TECHNOLOGY   (Thailand)

Author keywords

Circular ring turbulator (CRT); Friction factor; Heat transfer enhancement; Thermal performance; Turbulator

Indexed keywords

CONVECTIVE HEAT TRANSFER; DIAMETER RATIO; EXPERIMENTAL INVESTIGATIONS; FLUID FRICTION; FRICTION FACTORS; HEAT EXCHANGER TUBE; HEAT TRANSFER ENHANCEMENT; HEAT TRANSFER RATE; OPERATING CONDITION; PITCH RATIO; PLAIN TUBES; PRESSURE LOSS; ROUND TUBES; TEST TUBE; THERMAL PERFORMANCE; TURBULATORS; UNIFORM WALL HEAT FLUX;

FRICTION; HEAT EXCHANGERS; HEAT TRANSFER COEFFICIENTS; MIXED CONVECTION; REYNOLDS NUMBER; SPECIFIC HEAT; TRIBOLOGY; TUBES (COMPONENTS);

FLUORESCENT SCREENS;

EID: 77951636020     PISSN: 07351933     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.icheatmasstransfer.2009.12.016     Document Type: Article

References (22)

1. Royds R. Heat transmission by radiation, conduction and convection 1921, 53. Constable and Company, London. 1st ed.
2. Junkhan G.H., Bergles A.E., Nirmalan V., Ravigururajan T. Investigation of turbulators for fire tube boilers. Transaction of ASME: Journal of Heat Transfer 1985, 107:354-360.
3. Ayhan T., Azak Y., Demirtas C., Ayhan B. Numerical and experimental investigation of enhancement of turbulent flow heat transfer in tubes by means of truncated hollow cone inserts. Heat Transfer Enhancement of Heat Exchangers 1999, 347-356. Kluwer Academic Publishers.
4. Eiamsa-ard S., Promvonge P. Experimental investigation of heat transfer and friction characteristics in a circular tube fitted with V-nozzle turbulators. International Communication Heat and Mass Transfer 2006, 33:591-600.
5. Promvonge P., Eiamsa-ard S. Heat transfer augmentation in a circular tube using V-nozzle turbulator inserts and snail entry. Experimental Thermal and Fluid Science 2007, 32:332-340.
6. Eiamsa-ard S., Promvonge P. Effect of V-nozzle inserts and snail with free-spacing entry on heat transfer in a heat exchanger. Journal Energy, Heat and Mass Transfer 2006, 28:225-239.
7. Promvonge P., Eiamsa-ard S. Heat transfer and turbulent flow friction in a circular tube fitted with conical-nozzle turbulators. International Communication Heat and Mass Transfer 2007, 34:72-82.
8. Promvonge P., Eiamsa-ard S. Heat transfer enhancement in a tube with combined conical-nozzle inserts and swirl generator. Energy Conversion and Management 2006, 47:2867-2882.
9. Promvonge P., Eiamsa-ard S. Heat transfer in a circular tube fitted with free-spacing snail entry and conical-nozzle turbulators. International Communications in Heat and Mass Transfer 2007, 34:838-848.
10. Yakut K., Sahin B., Canbazoglu S. Performance and flow-induced vibration characteristics for conical-ring turbulators. Applied Energy 2004, 79:65-76.
11. Yakut K., Sahin B. Flow-induced vibration analysis of conical rings used of heat transfer enhancement in heat exchanger. Applied Energy 2004, 78:273-288.
12. Promvonge P. Heat transfer behaviors in round tube with conical ring inserts. Energy Conversion and Management 2008, 49:8-15.
13. Durmus A. Heat transfer and exergy loss in cut out conical turbulators. Energy Conversion and Management 2004, 45:785-796.
14. Promvonge P., Eiamsa-ard S. Heat transfer behaviors in a tube with combined conical-ring and twisted-tape insert. International Communications in Heat and Mass Transfer 2007, 34:849-859.
15. Eiamsa-ard S., Promvonge P. Enhancement of heat transfer in a circular wavy-surfaced tube with a helical-tape insert. International Energy Journal 2007, 8:29-36.
16. Yakut K., Sahin B. The effects of vortex characteristics on performance of coiled wire turbulators used for heat transfer augmentation. Applied Thermal Engineering 2004, 24:2427-2438.
17. Ozceyhan V., Gunes S., Buyukalaca O., Altuntop N. Heat transfer enhancement in a tube using circular cross sectional rings separated from wall. Applied Energy 2006, 83:280-298.
18. Akansu S.O. Heat transfers and pressure drops for porous-ring turbulators in a circular pipe. Applied Energy 2006, 83:280-298.
19. Murata A., Mochizuki S., Takahashi T. Local heat transfer measurements of an orthogonally rotating square duct with angled rib turbulators. International Journal of Heat and Mass Transfer 1999, 42:3047-3056.
20. Layek A., Saini J.S., Solanki S.C. Heat transfer and friction characteristics for artificially roughened ducts with compound turbulators. International Journal of Heat and Mass Transfer 2007, 50:4845-4854.
21. Ekkad S.V., Huang Y., Han J.C. Detailed heat transfer distributions in two-pass square channels with rib turbulators and bleed holes. International Journal of Heat and Mass Transfer 1998, 41:3781-3791.
22. Incropera F., Dewitt P.D. Introduction to heat transfer 1996, John Wiley & Sons Inc. 3rd ed.