Enhanced Heat Transfer Characteristics of Viscous Liquid Flows in a Chevron Plate Heat Exchanger

Abstract

Steady-state heat transfer and pressure drop data for single-phase viscous fluid flows (2 ≤ Re ≤ 400) in a single-pass U-type counterflow plate heat exchanger (PHE) with chevron plates are presented. With vegetable oil as test fluid (130 < Pr < 290), three different plate arrangements are employed: two symmetric (β = 30 deg/30 deg and 60 deg/60 deg) and one mixed (β = 30 deg/60 deg). The effects of chevron angle β, corrugation aspect ratio γ, and flow conditions (Re, Pr, μ/μw on Nu and f characteristics of the PHE are delineated. The results show a rather complex influence of plate surface corrugations on the enhanced thermal-hydraulic behavior. Relative to the performance of equivalent flat-plate packs, chevron plates sustain up to 2.9 times higher heat transfer rates on a fixed geometry and constant pumping power basis, and require up to 48 percent less surface area for the fixed heat load and pressure drop constraint.

Enhanced heat transfer due to curvature-induced lateral vortices in laminar flows in sinusoidal corrugated-plate channels

“…The most widely used plate-surface pattern in a PHE consists of chevron type corrugations that have a sinusoidal profile [7][8][9], as shown in Fig. 1.…”

“…1. With the chevron inclination (or half included) angle in the range 0°< b < 90°, cross-corrugated channels with multiple metal-to-metal inter-plate point contacts are obtained [6][7][8][9]. The case with b ¼ 0°yields a set of parallel double-sine-shaped ducts [10] as shown in Fig.…”

Heat transfer and rheology of stirred yoghurt during cooling in plate heat exchangers

“…Some studies were published focusing on heat transfer in plate heat exchangers using non-food fluids with viscous Newtonian and non-Newtonian, mainly pseudoplastic characteristics (Bassiouny & Martin, 1984a,b;Delplace, 1995;Kho & M€ u uller-Steinhagen, 1999;Leuliet, Maingonnat, & Lalande, 1987, 1990Muley, Manglik, & Metwally, 1999;Rene, Leuliet, & Lalande, 1991;Rene & Lalande, 1987). For such fluids, the performances of plate heat exchangers both from a thermal and hydraulic viewpoint, have been determined as a function of hydraulic diameter (Leuliet et al, 1990); pressure drop (Leuliet et al, 1987); flow distribution and arrangement type (Bassiouny & Martin, 1984a,b;Heggs, Sandham, Hallam, & Walton, 1997;Kho & M€ u ullerSteinhagen, 1999) and plate type (Rene et al, 1991).…”

Non‐Newtonian Heat Transfer on a Plate Heat Exchanger with Generalized Configurations

“…Jackson and Troupe [3], Buonopane and Troupe [4], and Bansal et al [5] have studied a configuration consisting of three channels and a countercurrent singlepass arrangement, since it is possible to assume pure countercurrent flow conditions. Muley et al [6], and Wright and Heggs [7] rely on the same assumption for the case of PHEs with a large number of channels per pass, since the effects of the parallel flow channels and of the channels at the PHE extremities (also known as end effects) can be neglected.…”