ライブラリ登録: Guest
Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集
Journal of Enhanced Heat Transfer
インパクトファクター: 0.562 5年インパクトファクター: 0.605 SJR: 0.211 SNIP: 0.361 CiteScore™: 0.33

ISSN 印刷: 1065-5131
ISSN オンライン: 1026-5511

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v7.i1.30
pages 23-33

Heat Transfer Augmentation Characteristics of Various Inserts in a Heat Exchanger Tube

Yongjoon Park
Heat Technology Team, Facilities Technology and Engineering Department, Pohang Iron and Steel Corporation Limited, 5, Dongchon-dong, Nam-gu, Pohang, Kyoungbuk, Korea, 790-360
Jaeeun Cha
Department of Mechanical Engineering Pohang University of Science and Technology San 31, Hyoja Dong, Pohang, 790-784, Korea
Moo Hwan Kim
Division of Advanced Nuclear Engineering, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea; Department of Mechanical Engineering, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea

要約

The characteristics of heat transfer and pressure drop were experimentally studied for a heat exchanger (recuperator) with several kinds of inserts. The augmentation of heat transfer was investigated for proposed inserts and compared with the typical inserts that have been already used in recuperator tubes.
Two test tubes with the same insert were used for the measurements of the friction and the heat transfer coefficients respectively. The length of the tubes was 64 times that of the tubes' inner diameter. Air was used as a working fluid in the tube and the experiments were executed in the turbulent flow region (Reynolds number: 2 × l04∼8 × l04) and the entrance region at the same time. The experiment was performed under a constant heat flux condition. Two types of single straight tapes, two types of cross tapes, a wire mesh, a delta wing tape, a ribbon tape and a conic coil used conventionally were investigated. Even though several vortex generators were investigated previously, a ribbon tape and a delta wing tape designed specially in this research were also tested (Fiebig (1994)). The performance parameter for a heat exchanger with insert was defined as the ratio of the heat transfer coefficient of a heat transfer tube with inserts to that of a smooth tube under the same pumping power.
Even though the performance values varied with the Reynolds number, the conic coil and the ribbon tape were generally shown to have better performance than the others. Their heat transfer performance was enhanced 30% relative to than the smooth tube. The mesh type insert and the delta wing tape were also useful for the heat transfer augmentation.


Articles with similar content:

A STUDY OF ENHANCED CERAMIC TUBES FOR HIGH PRESSURE WASTE HEAT RECOVERY
International Heat Transfer Conference 9, Vol.4, 1990, issue
R. D. Armstrong , A. E. Bergels
PARAMETRIC STUDY AND OPTIMIZATION OF A CIRCULAR TUBE FITTED WITH TWISTED WINGLET VORTEX GENERATOR INSERTS USING TAGUCHI METHOD
International Heat Transfer Conference 16, Vol.14, 2018, issue
Zhi-Long Song, Liang-Bi Wang, Zhi-Min Lin, Yong-He Wu, Yong-Heng Zhang
ENHANCEMENT OF HEAT TRANSFER IN TURBULENT FLOW THROUGH A TUBE WITH A PERFORATED TWISTED TAPE INSERT
Journal of Enhanced Heat Transfer, Vol.18, 2011, issue 1
Sarkar Rashid, S. Ahmed, Md. Abdul Wazed, J. U. Ahamed
STUDIES ON BOILING IN TUBE BUNDLES
International Heat Transfer Conference 8, Vol.5, 1986, issue
Keith Cornwell, P. R. Andrews, J. G. Einarsson
PERFORMANCE OF ENHANCEMENT DEVICES
Performance Optimization of Internally Finned Tubes for Laminar Flow Heat Exchangers

ICHMT DIGITAL LIBRARY ONLINE, Vol.19, 1981, issue
Hassan M. Soliman, A. C. Trupp