图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
强化传热期刊
影响因子: 0.562 5年影响因子: 0.605 SJR: 0.211 SNIP: 0.361 CiteScore™: 0.33

ISSN 打印: 1065-5131
ISSN 在线: 1026-5511

强化传热期刊

DOI: 10.1615/JEnhHeatTransf.v10.i1.30
pages 21-30

Experimental Study on Heat Transfer in Wavy Channels

Yi-Sheng Lee
Department of Mechanical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd.,Taipei 106, Taiwan
Chin-Chia Su
Department of Mechanical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd.,Taipei 106, Taiwan
Yu-Ming Sun
China Engineering Consultants, Inc., 2F, No. 1, Kuang-Fu S. Rd., Alley 240,Taipei 106, Taiwan
Jang-Chiang Ye
Department of Mechanical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd.,Taipei 106, Taiwan

ABSTRACT

Plate heat exchangers (PHEs) are currently used as heat transfer components in refrigeration systems. The major characteristics of PHEs are their wavy flow channels. Detailed knowledge of the transport phenomena within the channel is thus a necessity. Unfortunately, the available literature primarily emphasizes the overall performance of PHEs. This experimental study is thus intended to investigate the effect of channel geometry and flow conditions on the heat transfer of the exchangers. In this work, two stainless steel cases with surfaces of the same wavy shape were clipped between two metal plates to constitute the required flow channel, through which air was passed. The shape of the corrugated surface could be changed for different cases. The temperature of the wall was kept constant with hot water. Starting from the entrance, the temperature distribution within the channel of two wavelengths was monitored with thermocouples. The geometric parameters investigated in this work include the width (W) and corrugated angle (b) of the flow channel. The flow rate of air was also varied to study the effect of the Reynolds number (Re). Results indicate that the local Nusselt number (Nux) is greater at sections close to the wave crest than at other regions within the channel. The average Nusselt number (Nu) increases with Re and b but does not change apparently with W. Nux increases with Re but decreases with the distances from the entrance of the channel. Furthermore, the heat transfer coefficient (hm) increases with b but decreases with W.


Articles with similar content:

Heat transfer in wavy channels of plate heat exchanger
International Heat Transfer Conference 12, Vol.51, 2002, issue
Yu-Ming Sun, Jang-Chiang Ye, Yi-Sheng Lee, Chin-Chia Su
Effects of Rib Height on Heat Transfer Performance Inside a High Aspect Ratio Channel with Inclined Ribs
Journal of Enhanced Heat Transfer, Vol.10, 2003, issue 4
Akira Murata, Robert Kiml, Sadanari Mochizuki
Numerical Investigation of Flow and Heat Transfer around Two Semi-Circular Cylinders with a Splitter Plate
Heat Transfer Research, Vol.42, 2011, issue 7
Hadi Heidary, Mostafa Nourollahi, Kurosh Sedighi, Mousa Farhadi
Dimple Enhanced Heat Transfer in High Aspect Ratio Channels
Journal of Enhanced Heat Transfer, Vol.10, 2003, issue 4
Srinath V. Ekkad, Hasan Nasir
An Experimental Investigation of the Performance of Cross-Corrugated Plate Heat Exchangers
Journal of Enhanced Heat Transfer, Vol.10, 2003, issue 4
Mir-Akbar Hessami