Investigation of flow and heat transfer in corrugated passages—I. Experimental results

Stąsiek, J.; Collins, Michael W.; Ciofalo, Michele; Chew, P. E.

doi:10.1016/s0017-9310(96)85013-7

Cited by 158 publications

(59 citation statements)

References 14 publications

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“…Due to the broad range of application of this heat transfer equipment, several experimental and modelling works have been performed in order to study the thermal and hydraulic performance of different plate patterns, fouling tendency, corrosion mechanisms and the optimization of different arrangements and configurations, when leading with Newtonian or non-Newtonian fluids (Afonso et al, 2003;Antonini, François, & Shuai, 1987;Bassiouny & Martin, 1984;Delplace & Leuliet, 1995;Gut & Pinto, 2003a, 2003bKho & Mü ller-Steinhagen, 1999;Leuliet, Maigonnat, & Lalande, 1987, 1988, 1990Mehrabian & Poulter, 2000;Metwally & Manglick, 2004;Stasiek, Collins, Ciofalo, & Chew, 1996).…”

Section: Introductionmentioning

confidence: 99%

Thermal behaviour of stirred yoghurt during cooling in plate heat exchangers

Fernandes

Dias

Nóbrega

et al. 2006

Journal of Food Engineering

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In this study, CFD calculations were made in order to analyse the thermal behaviour of yoghurt in a plate heat exchanger, the yoghurt viscosity being described by a Herschel-Bulkley model.The influence of Reynolds number on local Nusselt numbers was analysed as well as the influence of entry effects on average Nusselt number. Numerical runs considering and discarding the influence of temperature on the viscosity were performed and the impact on average Nusselt numbers was analysed. Transversal variations of viscosity were studied and thermal correlations including the ratio between bulk and wall viscosities are proposed.The obtained thermal correlations were compared with the experimental ones (described in the literature) and a very good agreement was found, mainly when considering the effect of temperature on viscosity. Simulations with a non-Newtonian fluid having lower Prandtl numbers than yoghurt were performed in order to analyse the influence of this variation on the Reynolds number exponent of the thermal correlation.

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Section: Introductionmentioning

confidence: 99%

Thermal behaviour of stirred yoghurt during cooling in plate heat exchangers

Fernandes

Dias

Nóbrega

et al. 2006

Journal of Food Engineering

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“…At lower heat transfer coefficient, the discrepancy may have been caused by two reasons. One is the simplification of a lumped fluid heat transfer coefficient, as the heat transfer coefficient in unitary cell has been shown to vary by experiment [21][22] and CFD model [22][23]. The other reason is that the experimental data only represents an averaged value of the entire heat exchanger.…”

Section: Effect Of End Plate On Heat Transfermentioning

confidence: 99%

Effect of end plates on heat transfer of plate heat exchanger

Jin

Hrnjak

2017

International Journal of Heat and Mass Transfer

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Steady-state heat transfer data for single-phase (water) in both frame-and-plate (FPHE) and brazed plate heat exchangers (BPHE) are presented with various number of chevron plates in U-type flow arrangement. Analysis of the experimental results indicates that the end plates, instead of being adiabatic, function as fins due to the contact with adjacent plates. The experimental data is used to validate a thermal conduction model in ANSYS, which indicates that the end plates fin efficiency is a function of fluid convective heat transfer coefficient and conductive thermal resistance. In the frame-and-plate heat exchanger, the pressing force of the frame may affect the contact thermal resistance, thus change the fin efficiency. In brazed plate heat exchanger, the fin efficiency is much higher due to the larger contact area and higher conductivity of the brazing material. Although the effect of end plates is quickly diluted by the increased number of plates in real applications, it could be significant when plate number is small, as is often the case in laboratory settings for the development of heat transfer correlations.

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“…In the present study, the fin shape is determined following Utriainen and Sunden 18) and the fin height is set to 4 mm based on a design study by Sumitomo Precision Products. 19) The heat transfer coefficient h and friction factor f of the fin are estimated from experiment of Stasiek et al 20) as follows.…”

Section: Heat Exchanger Modelmentioning

confidence: 99%

Optimization of Intercooled Turbofan Jet Thermodynamic Cycle Considering Weight Penalty and Pressure Loss of Heat Exchanger

Shinmyo¹,

Teramoto²,

Okamoto³

et al. 2014

Trans. Japan Soc. Aero. S Sci.

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Thermal cycles of a turbofan jet engine equipped with an intercooler are optimized for two different engine sizes to understand the engine characteristics. The optimization tool consists of a thermodynamic cycle analysis module, a weight evaluation module, a heat exchanger model and an optimization routine. It is confirmed that the tool searches for a reasonable design point within a ten-dimensional design space. The pressure ratio of a conventional turbofan is restricted by the compressor exit temperature. In contrast, intercooling enables higher pressure ratios and hence higher core thermal efficiency. The net decrease in fuel consumption is small however, because the thermal efficiency improvement, weight penalty and pressure loss are all at the same order of several percent. The minimum blade height at the compressor exit imposes another restriction on the pressure ratio increase for small intercooled engines, and net fuel consumption in small engines may increase by intercooling. The performance of an intercooled turbofan is determined by a balance between thermal efficiency improvement through the increase in pressure ratio and disadvantages resulting from additional weight and pressure losses. The development of a light, low-pressure-loss heat exchanger and optimization of the thermodynamic cycle are important.

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Investigation of flow and heat transfer in corrugated passages—I. Experimental results

Cited by 158 publications

References 14 publications

Thermal behaviour of stirred yoghurt during cooling in plate heat exchangers

Thermal behaviour of stirred yoghurt during cooling in plate heat exchangers

Effect of end plates on heat transfer of plate heat exchanger

Optimization of Intercooled Turbofan Jet Thermodynamic Cycle Considering Weight Penalty and Pressure Loss of Heat Exchanger

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