Please use this identifier to cite or link to this item: http://ir.swu.ac.th/jspui/handle/123456789/15014
Title: Effect of coil-wire insert on heat transfer enhancement and pressure drop of the horizontal concentric tubes
Authors: Naphon P.
Keywords: Heat transfer coefficients
Laminar flow
Pipe flow
Pressure drop
Temperature measurement
Coil-wire insert
Flow rate
Horizontal concentric tubes
Heat transfer
Heat transfer
Heat transfer coefficients
Laminar flow
Pipe flow
Pressure drop
Temperature measurement
Issue Date: 2006
Abstract: In the present study, the heat transfer characteristics and the pressure drop of the horizontal double pipe with coil-wire insert are investigated. The inner and outer diameters of the inner tube are 8.92 and 9.52 mm, respectively. The coiled wire is fabricated by bending a 1 mm diameter of the iron wire into a coil with a coil diameter of 7.80 mm. Cold and hot water are used as working fluids in the shell side and tube side, respectively. The test runs are performed at the cold and hot water mass flow rates ranging between 0.01 and 0.07 kg/s, and between 0.04 and 0.08 kg/s, respectively. The inlet cold and hot water temperatures are between 15 and 20 °C, and between 40 and 45 °C, respectively. The effect of the coil pitch and relevant parameters on heat transfer characteristics and pressure drop are considered. Coil-wire insert has significant effect on the enhancement of heat transfer especially on laminar flow region. Non-isothermal correlations for the heat transfer coefficient and friction factor are proposed. There is reasonable agreement between the measured data and predicted results. © 2006 Elsevier Ltd. All rights reserved.
URI: https://www.scopus.com/inward/record.uri?eid=2-s2.0-33746980870&doi=10.1016%2fj.icheatmasstransfer.2006.01.020&partnerID=40&md5=0df40780e1f0e27aa1688e45a62f8319
http://ir.swu.ac.th/jspui/handle/123456789/15014
ISSN: 7351933
Appears in Collections:Scopus 1983-2021

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