Enhancement of heat transfer by a combination of three-start spirally corrugated tubes with a twisted tape
DOI: 10.1016/S0017-9310(00)00126-5
关键词:
摘要: Heat transfer and isothermal friction pressure drop results have been obtained experimentally for two three-start spirally corrugated tubes combined with five twisted tape inserts different relative pitches in the range of Reynolds number 3×103–6×104. The characteristic parameters are: height to diameter ratio, e/Di=0.0407 0.0569; pitch, H/Di=15.3, 12.2, 7.7, 5.8, 4.7. Significantly, higher factor inside heat-transfer coefficients than those smooth tube under same operating conditions observed. Extended performance evaluation criteria (PEC) equations enhanced heat surfaces used assess multiplicative effect. Thermodynamic optimum can be defined by minimizing entropy generation compared increase rate or reduction area.
elsevier.com
sci-hub.se 参考文章(12)
E. Arthur Bergies, The Imperative to Enhance Heat Transfer Springer, Dordrecht. pp. 13- 29 ,(1999) , 10.1007/978-94-015-9159-1_2
V. Gnielinski, New equations for heat and mass transfer in turbulent pipe and channel flow International Chemical Engineering. ,vol. 16, pp. 359- 368 ,(1976)
W. J. Marner, A. E. Bergles, J. M. Chenoweth, On the Presentation of Performance Data for Enhanced Tubes Used in Shell-and-Tube Heat Exchangers Journal of Heat Transfer. ,vol. 105, pp. 358- 365 ,(1983) , 10.1115/1.3245586
V.D. Zimparov, N.L. Vulchanov, L.B. Delov, Heat transfer and friction characteristics of spirally corrugated tubes for power plant condensers—1. Experimental investigation and performance evaluation International Journal of Heat and Mass Transfer. ,vol. 34, pp. 2187- 2197 ,(1991) , 10.1016/0017-9310(91)90045-G
R.L. Webb, Performance evaluation criteria for use of enhanced heat transfer surfaces in heat exchanger design International Journal of Heat and Mass Transfer. ,vol. 24, pp. 715- 726 ,(1981) , 10.1016/0017-9310(81)90015-6
R.L Webb, E.R.G Eckert, Application of rough surfaces to heat exchanger design International Journal of Heat and Mass Transfer. ,vol. 15, pp. 1647- 1658 ,(1972) , 10.1016/0017-9310(72)90095-6
A. E. Bergles, R. A. Lee, B. B. Mikic, Heat Transfer in Rough Tubes With Tape-Generated Swirl Flow Journal of Heat Transfer. ,vol. 91, pp. 443- 445 ,(1969) , 10.1115/1.3580215
Ventsislav Zimparov, Extended performance evaluation criteria for enhanced heat transfer surfaces: heat transfer through ducts with constant wall temperature International Journal of Heat and Mass Transfer. ,vol. 43, pp. 3137- 3155 ,(2000) , 10.1016/S0017-9310(99)00317-8
A.E. Bergles, R.L. Bunn, G.H. Junkhan, Extended performance evaluation criteria for enhanced heat transfer surfaces Letters in Heat and Mass Transfer. ,vol. 1, pp. 113- 120 ,(1974) , 10.1016/0094-4548(74)90147-7
Constantinos A. Balaras, A review of augmentation techniques for heat transfer surfaces in single-phase heat exchangers Energy. ,vol. 15, pp. 899- 906 ,(1990) , 10.1016/0360-5442(90)90071-9