Experimental research on pressure drop to optimize twisted strips with holes in tubes of condensers

被引：1

作者：

Deqi, Peng ^{[1
]}

Yajie, Zhou ^{[2
]}

Weiqiang, Wang ^{[1
]}

Tianlan, Yu ^{[1
]}

Huan, Yu ^{[1
]}

Jianye, Yi ^{[1
]}

机构：

[1] Xiangtan Univ, Sch Mech Engn, Xiangtan, Hunan, Peoples R China

[2] Hunan Valin Xiangtan Iron & Steel Co Ltd, Xiangtan, Hunan, Peoples R China

来源：

RENEWABLE AND SUSTAINABLE ENERGY, PTS 1-7 | 2012年 / 347-353卷

基金：

湖南省自然科学基金;

关键词：

Vacuum condenser; Fouling removal; Twisted strip; Pressure drop; FRICTION FACTOR CHARACTERISTICS; SCREW-TAPE INSERTS; HEAT-TRANSFER; FLOW;

D O I：

10.4028/www.scientific.net/AMR.347-353.448

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

In order to reduce the pressure drop increase caused by self-rotating plastic twisted-strips in heat transfer tubes of vacuum condensers in thermal power plant, the twisted strips structure is optimized. There are holes distributed in twisted strip uniformly. The holes diameter and interval are optimized through experimental research. The results show that when holes diameter is less than 6mm, holes can reduce the pressure drop increase at low flow velocity while the pressure drop with holes is greater than that without holes at high flow velocity. The holes diameter is 4 similar to 5mm when the pressure drop is the lowest. The pressure drop with holes is always larger than that without holes when holes diameter is more than 6mm. The pressure drop will increase as holes interval decreases at high flow velocity, while it will reduce at low flow velocity.

引用

页码：448 / +

页数：2

共 10 条

[1] Heat transfer and pressure drop in tube with broken twisted tape insert
Chang, Shyy Woei
Yang, Tsun Lirng
Liou, Jin Shuen
[J]. EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2007, 32 (02) : 489 - 501
[2] Turbulent heat transfer and pressure drop in tube fitted with serrated twisted tape
Chang, Shyy Woei
Jan, Yih Jena
Liou, Jin Shuen
[J]. INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2007, 46 (05) : 506 - 518
[3] Heat transfers in tubes fitted with single, twin, and triple twisted tapes
Chang, SW
Yu, KW
Lu, MH
[J]. EXPERIMENTAL HEAT TRANSFER, 2005, 18 (04) : 279 - 294
[4] HEAT-TRANSFER AND PRESSURE-DROP CORRELATIONS FOR TWISTED-TAPE INSERTS IN ISOTHERMAL TUBES .2. TRANSITION AND TURBULENT FLOWS
MANGLIK, RM
BERGLES, AE
[J]. JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1993, 115 (04): : 890 - 896
[5] Optimal cleaning schedule for heat exchangers in a heat exchanger network
Markowski, M
Urbaniec, K
[J]. APPLIED THERMAL ENGINEERING, 2005, 25 (07) : 1019 - 1032
[6] Qing Defan, 2001, MECH RES APPL, V14, P3
[7] Friction and heat transfer characteristics of laminar swirl flow through a circular tube fitted with regularly spaced twisted-tape elements
Saha, SK
Dutta, A
Dhal, SK
[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2001, 44 (22) : 4211 - 4223
[8] Experimental studies on heat transfer and friction factor characteristics of turbulent flow through a circular tube fitted with regularly spaced helical screw-tape inserts
Sivashanmugam, P.
Suresh, S.
[J]. APPLIED THERMAL ENGINEERING, 2007, 27 (8-9) : 1311 - 1319
[9] Experimental studies on heat transfer and friction factor characteristics of laminar flow through a circular tube fitted with regularly spaced helical screw-tape inserts
Sivashanmugam, P.
Suresh, S.
[J]. EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2007, 31 (04) : 301 - 308
[10] Yu Tianlan, 2002, MODERN CHEM IND, V22, P46

← 1 →