Evaporation heat transfer and flow characteristics of vertical upward flow in a plate-fin heat exchanger

Jige, Daisuke; Sugihara, Kota; Inoue, N.

doi:10.1016/j.ijrefrig.2021.09.030

Cited by 18 publications

(10 citation statements)

References 9 publications

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“…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 5 .…”

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%

“…7 Among these, offset-strip fin (OSF) is regularly used due to its compactness. 8 It has a higher heat transfer capability. 5 This is because of the periodic interruption and development of the boundary layer.…”

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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“…Average HTCs are also widely used during evaporation or condensation heat transfer. Jige et al [10] researched the two-phase evaporation flow of FHE using thermodynamic fluids: R32 and R1234ze(E). 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.…”

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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“…The thermal performance enhancement of heat exchangers, which are essentially used in almost all types of thermal processes, has been considered a key topic owing to an interest in global energy efficiency enhancement. Therefore, the importance of two-phase heat transfer, in which the heat transfer performance is superior compared to single-phase heat transfer, has been emphasized [1][2][3][4]. Raju et al [5] studied the evaporation heat transfer of R-134a and the pressure drop at a plate-fin heat exchanger (PFHE) with wavy fins.…”

Section: Introductionmentioning

confidence: 99%

Effects of Experimental Parameters on Condensation Heat Transfer in Plate Fin Heat Exchanger

et al. 2021

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This study aims to provide an experimental investigation and comparison of the condensation heat transfer characteristics in a plate–fin heat exchanger (PFHE). The heat flux, mass flux, and saturation pressure were adjusted as experimental parameters to verify the effects on the condensation heat transfer. In addition, condensation heat transfer correlation of two-stream PFHEs was provided based on the experimental data for utilization as a design reference for the heat exchanger. The turbulence is the most influential in heat transfer. One of the ways to foster turbulence is to increase shear stress. The higher flow velocity results in the higher shear stress. That was why increasing mass flux or the flow with higher vapor quality showed the higher heat transfer coefficient (HTC). Refrigerant properties such as viscosity and specific volume of vapor changed according to the saturation pressure. It is expected they affect the degree of turbulence too in similar manners. The mass flux was more influential than the heat flux and saturation pressure. Thus, the equivalent mass flux of the refrigerant is dominant in the derived correlation model. The average difference between experimental and calculated HTC from correlations was about 6.5%. Multi-stream PFHE comprises an additional heat transfer surface, which implies a more active droplet formation. The average pressure drop in the multi-stream is 15% larger than that of the two-stream.

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Evaporation heat transfer and flow characteristics of vertical upward flow in a plate-fin heat exchanger

Cited by 18 publications

References 9 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

Effects of Experimental Parameters on Condensation Heat Transfer in Plate Fin Heat Exchanger

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Evaporation heat transfer and flow characteristics of vertical upward flow in a plate-fin heat exchanger

Cited by 18 publications

References 9 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

Effects of Experimental Parameters on Condensation Heat Transfer in Plate Fin Heat Exchanger

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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