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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

EFFECTS OF WAVELENGTH AND INCLINATION ANGLE ON THE HOMOGENEITY OF LOCAL HEAT TRANSFER COEFFICIENTS IN PLATE HEAT EXCHANGERS

Get access (open in a dialog) DOI: 10.1615/IHTC11.1550
pages 203-208

摘要

In this paper the combined effects of the wavelength and the inclination angle of the corrugated structure in plate heat exchangers are examined. Results on local heat transfer coefficients, integral heat transfer and on flow characteristics are discussed. The investigation local heat transfer in these structures have been performed using a method of local mass transfer.
It is shown that both the wavelength and the inclination angle strongly affect the mean heat transfer as well as the homogeneity of the local heat transfer coefficients. A homogeneous distribution of local heat transfer coefficients should be aimed at to prevent the problem of fouling.
It is shown that short wavelengths and small inclination angles result in an inhomogeneous distribution of local heat transfer coefficients with a low heat transfer in the furrows of the corrugation. Longer wavelengths at intermediate inclination angles lead to a homogeneous local heat transfer, while small inclination angles at longer wavelength again cause an inhomogeneous local heat transfer.