Condensation heat transfer performance in multi-fluid compact heat exchangers with wavy and strip fins

Vaisi, Ahmad; Javaherdeh, Kourosh; Moosavi, Rouhollah

doi:10.1016/j.ijheatmasstransfer.2021.121968

Cited by 27 publications

(7 citation statements)

References 49 publications

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“…Based on the configuration, the CHEs are available in two types, namely (i) tube‐fin heat exchanger and (ii) plate‐fin heat exchanger 6 . Commonly used fins in PFHE are (i) simple, (ii) straight, (iii) offset‐strip, (iv) wavy, and (v) louvered 7 . Among these, offset‐strip fin (OSF) is regularly used due to its compactness 8 .…”

Section: Introductionmentioning

confidence: 99%

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Rating and performance of plate fin heat exchanger used for cryogenic separation of CO ₂

Nandakishora

Sahoo

Murugan

et al. 2022

Intl J of Energy Research

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Carbon capture by cryogenic treatment is one of the emerging methods in curbing carbon dioxide (CO 2 ) emissions, because it not only offers energy-saving, but also environmental benefits due to the absence of chemicals as used by other methods. However, the cryogenic system used for CO 2 capture demands a high-effectiveness heat exchanger. In this case, a plate-fin heat exchanger (PFHE) is used. In this study, PFHE is analyzed for decreasing the temperature of CO 2 and N 2 mixture with cold N 2 gas. The study consists of three parts that are (i) a comparative study of Aspen EDR with heat exchanger parameter evaluation correlations such as Joshi & Webb, Manglik & Bergles, and Maiti & Sarangi, and (ii) validation of Aspen EDR software with experimental results which is available from open literature. Hence, validation of heat exchanger design is indirectly done with experimental results. (iii) Besides this, the research is aimed at studying the influence of the gas mixture inlet temperature, the concentration of CO 2 , pressure drop, and the mass flow rate on PFHE's effectiveness. The study results are analyzed and presented in this research article.

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Section: Introductionmentioning

confidence: 99%

“…6 Commonly used fins in PFHE are (i) simple, (ii) straight, (iii) offset-strip, (iv) wavy, and (v) louvered. 7 Among these, offset-strip fin (OSF) is regularly used due to its compactness. 8 It has a higher heat transfer capability.…”

mentioning

confidence: 99%

Rating and performance of plate fin heat exchanger used for cryogenic separation of CO ₂

Nandakishora

Sahoo

Murugan

et al. 2022

Intl J of Energy Research

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“…The authors noticed that in some region of the FHE, the HTC are significantly smaller than in the rest of the FHE regions, due to the formed dry area, which decrease HTC. Vaisi et al [11] presented heat transfer characteristics during condensation flow in FHE with two types of fins. The authors spotted also, that higher wave amplitude to wavelength ratios, lower pitch to height ratio of the fins, lower wavelength to the fin length ratios, and lower fin pitch to wave amplitude ratios are obtained a higher thermal performance factor.…”

Section: Introductionmentioning

confidence: 99%

Nusselt Numbers and Friction Factor Determination of Air-Side Finned Heat Exchangers – Individual Correlations of Each Row

Marcinkowski¹,

Taler²,

Taler³

et al. 2022

Preprint

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The object of this work is to determine the correlation on the Nusselt number on the individual rows of a four-row tubular finned heat exchanger with continuous fins with a staggered tube arrangement using CFD modelling. Correlations for calculating Darcy-Weisbach friction factors on individual tube rows were also determined. Relationships for the Nusselt number and friction factor derived for the entire exchanger based on CFD modelling were compared with those available in the literature determined using experimental data. The maximum relative differences between the Nusselt number for a four-row exchanger determined experimentally and by CFD modelling are in the range from 22% for a Reynolds number based on a tube's outside diameter of 1,000 to 30% for a Reynolds number of 13,000. The maximum relative differences between the friction factor for a four-row exchanger determined experimentally and by CFD modelling are in the range of 50% for a Reynolds number based on a tube outer diameter of 1,000 to 10% for a Reynolds number of 13,000. The CFD modeling performed shows that in the range of Reynolds numbers based on hydraulic diameters from 150 to 1,400, the Nusselt number for the first row in a four-row finned heat exchanger is about 22% to 15% higher than the average Nusselt number for the entire exchanger. In the range of Reynolds number changes based on hydraulic diameter from 2,800 to 6,000, the Nusselt numbers on the first and second rows of tubes are close to each other. Correlations on Nusselt numbers and friction factors derived for individual tube rows can be used in the design of plate-fin and tube heat exchangers used in equipment such as air-source heat pumps, automotive radiators, air-conditioning systems and in air hot-liquid coolers. In particular, the correlations can be used to select the optimum number of tube rows in the exchanger.

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“…Umavathi et al 28 have studied the unsteady mixed convection flow of two immiscible fluids confined between a corrugated vertical wall and a parallel flat wall. Using this geometrical configuration of channel, Umavathi and colleagues [29][30][31][32][33] studied heat transfer flow induced by two different types of fluid layers within channels. Effects of Re and temperature changes in a multi-flow plate-fin heat exchanger with a two-phase flow were studied by Vaisi et al 34 The authors deduced that increasing the Reynolds number of the cold and hot fluid flows increased the two-phase Nusselt number.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the two‐phase steam‐air heat transfer flow induced in smooth and corrugated channel using the VOF model

Koulali

2022

Heat Trans

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In this paper, heat transfer induced in smooth and wavy channels in the presence of two phases (air and steam) was conducted and discussed. Two configurations have been studied according to the geometrical shape of the channel walls. The thermal and hydrodynamic fields in the channel have been predicted using the single-fluid approach with a solver based on the finite volume method. Explicit formulation of the volume of fluid was used to track the interface between both fluids. The mesh in the wavy channel was treated with a curvilinear mesh grid. Local Nusselt evolution, isothermal distribution, streamlines, and other parameters have been shown at different times of simulation. It was found that weak air phase velocities and wave patterns of the channel walls play a destabilizing role in the interface evolution between both fluid phases. In addition, results show that channels with wavy walls can be an effective solution to ensure higher heat transfer in two-phase flows.

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Condensation heat transfer performance in multi-fluid compact heat exchangers with wavy and strip fins

Cited by 27 publications

References 49 publications

Rating and performance of plate fin heat exchanger used for cryogenic separation of CO ₂

Rating and performance of plate fin heat exchanger used for cryogenic separation of CO ₂

Nusselt Numbers and Friction Factor Determination of Air-Side Finned Heat Exchangers – Individual Correlations of Each Row

Numerical analysis of the two‐phase steam‐air heat transfer flow induced in smooth and corrugated channel using the VOF model

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Condensation heat transfer performance in multi-fluid compact heat exchangers with wavy and strip fins

Cited by 27 publications

References 49 publications

Rating and performance of plate fin heat exchanger used for cryogenic separation of CO 2

Rating and performance of plate fin heat exchanger used for cryogenic separation of CO 2

Nusselt Numbers and Friction Factor Determination of Air-Side Finned Heat Exchangers – Individual Correlations of Each Row

Numerical analysis of the two‐phase steam‐air heat transfer flow induced in smooth and corrugated channel using the VOF model

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Product

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Rating and performance of plate fin heat exchanger used for cryogenic separation of CO ₂

Rating and performance of plate fin heat exchanger used for cryogenic separation of CO ₂