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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

STUDY ON FLOW AND HEAT TRANSFER MECHANISM OF CORRUGATED PLATE HEAT EXCHANGER

Get access (open in a dialog) DOI: 10.1615/IHTC16.hte.023014
pages 5025-5032

Abstract

In this paper, the Realizable k-ε turbulence model is used to study the flow and heat transfer mechanism of a corrugated channel in plate heat exchanger. Considering various Reynolds number (Re) in turbulence regions, the variation of the averaged characteristic number on wall surface (Nu and ƒ) and the local characteristic number along the wall surfaces of the corrugated channel (Nux and ƒx) are investigated. In addition, the averaged and local distribution of internal flow and heat transfer parameters at various transverse profiles is analyzed. The results show that Nu for the concave wall is larger than convex wall Re<7860, while present an adverse trend when Re>7860. However, ƒ on the convex wall is always larger than that on the concave wall. Nux reach two peak values where near the exit is greater than the entrance. For the concave wall, Nux exist a peak value and a trough value located near the entrance and the exit respectively. As for ƒx, an instant increasing occurs near the exit of the convex wall, while appears near the entrance of the concave wall. Investigating the flow and heat transfer parameters at the five profiles, the higher velocity and temperature is concentrated on the upstream and downstream of channel, but turbulence kinetic energy increases gradually from upstream to downstream. Observing the local distribution along the transverse profiles, velocity gradient, temperature gradient and turbulence kinetic energy is higher at the upstream of the channel.