Heat transfer factor j and friction factor f correlations for offset strip fin and wavy fin of compact plate-fin heat-exchangers

Kedam, Naresh; A, Uglanov Dmitry; Evgeniy, Blagin; A, Gorshkalev Alexey

doi:10.1016/j.csite.2021.101552

Cited by 21 publications

(5 citation statements)

References 16 publications

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“…The non-dimensional evaluation index, the j/f factor, is adopted to quantitatively assess the efficacy of the cold plate design in the present study. The Colburn j-factor and the fanning friction factor f are widely used to characterize the thermal-hydraulic performance of compact heat exchangers [30]. The Colburn j-factor is calculated by…”

Section: Data Reductionmentioning

confidence: 99%

Thermal-Hydraulic Characteristics of the Liquid-Based Battery Thermal Management System with Intersected Serpentine Channels

Liu

Gao

Niu

et al. 2022

Water

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Liquid thermal management is the prevailing method to maintain the operating performance and safety of Li-ion batteries. However, a better heat transfer performance is often accompanied by a higher power cost for liquid-based cooling methods. In the present work, V-shaped intersecting bypasses are integrated into conventional serpentine channels to reduce the liquid pressure drop across the cold plate without loss of thermal performance. The thermal-hydraulic characteristics of the battery thermal management system are studied based on CFD simulations. The non-dimensional j/f factor is developed and adopted to evaluate the heat transfer ability and friction loss of different designs. The effects of intersecting channel addition, flow direction, channel inlet, and outlet distributions are explored with the simulation results and data analysis. The results show that all of these factors would impact the thermal–hydraulic characteristics of the liquid cold plate. The addition of intersecting channels remarkably reduces the power cost, thus increasing the j/f factor. The alteration of the flow direction from longitudinal to widthwise could further improve the thermal-hydraulic characteristics of the intersected channel design. For conventional serpentine channels, the inlet and outlet distributions show no evident impact on thermal performance. However, regarding the intersected cases, the thermal-hydraulic performance is enhanced when the inlet and outlet are placed on the opposite sides of the cold plate, especially when the inlet velocity is less than 0.3 m/s. The findings of this study could shed light on the liquid flow channel design for battery thermal management.

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Section: Data Reductionmentioning

confidence: 99%

Thermal-Hydraulic Characteristics of the Liquid-Based Battery Thermal Management System with Intersected Serpentine Channels

Liu

Gao

Niu

et al. 2022

Water

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“…Suppose there are m vectors as the optimization results of n objective functions, as shown in Equation (12).…”

Section: Optimum Solution Selectionmentioning

confidence: 99%

“…Several researchers have explored the optimization method for design parameters of plate-fin heat exchangers. Kedam et al [12] used the heat transfer j correlations to design a compact plate-fin heat exchanger, and results showed that this model was viable for PFHE with offset trip fins and wavy fins. Jige et al [13] focused on the heat transfer characteristics of vertical upward flow in plate-fin heat exchangers.…”

Section: Introductionmentioning

confidence: 99%

Design Optimization of Plate-Fin Heat Exchanger in a Gas Turbine and Supercritical Carbon Dioxide Combined Cycle with Thermal Oil Loop

et al. 2021

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This paper presents an investigation on the optimum design for a plate-fin heat exchanger (PFHE) of a gas and supercritical carbon dioxide combined cycle which uses thermal oil as intermediate heat-transfer fluid. This may promote the heat transfer from low heat-flux exhaust to a high heat-flux supercritical carbon dioxide stream. The number of fin layers, plate width and geometrical parameters of fins on both sides of PFHE are selected as variables to be optimized by a non-dominated sorting genetic algorithm-II (NSGA-II), which is a multi-objective genetic algorithm. For the confliction of heat transfer area and pressure drop on the exhaust side, which are the objective indexes, the result of NSGA-II is a Pareto frontier. The technique for order of preference by similarity to ideal solution (TOPSIS) approach is applied to choose the optimum solution from the Pareto frontier. Finally, further simulation is performed to analyze the effect of each parameter to objective indexes and confirm the rationality of optimization results.

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“…Based on experimental data from 16 different sizes of fins, multiple regression analysis was conducted to obtain experimental correlations for heat transfer and pressure drop of corrugated fins. Naresh et al 7 summarized the experimental data of corrugated fins and offset fins in a series of published literature, unified the fin size into 8 dimensionless quantities, and fitted the calculation correlation of the Colburn j factor and friction factor f for a wide range (120–10,000) of Reynolds numbers. The maximum deviation between the correlation calculation results and the experimental data of Kays and London 8 was within ± 5%.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer and pressure drop characteristic research of sine wavy flying-wing fins

Miao,

Wan,

et al. 2023

Sci Rep

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In recent years, heat transfer enhancement of heat exchange equipment has attracted more and more attention. In this paper, the heat transfer and pressure drop characteristics of sine wavy flying-wing fins are studied by numerical method. The objective is to improve the integrated heat transfer and pressure drop performance of sine wavy flying-wing fins. The degrees of freedom of fin sizes include fin pitch to fin height ratio fp/fh, fin height to fin wavelength ratio fh/W, fin amplitude to fin pitch ratio 2A/fp and fin inclined angle α. The results show that among the calculated 17 flying-wing fins, the optimal values of fp/fh, fh/W, 2A/fp, and α are 0.5, 0.4, 1.9 and 70° respectively. The optimized SWFWF simulation model is established, and the average JF factor is 1.307, which is about 10.9% higher than that of Fin 05 (JF = 1.18). Multiple linear regression is used to obtain the correlations of flow and heat transfer characteristics of flying-wing fins. The average deviation of the correlations for j and f are 0.85% and 4.9% respectively. The correlations can be used for the design and optimization of sine wavy flying-wing fins.

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Heat transfer factor j and friction factor f correlations for offset strip fin and wavy fin of compact plate-fin heat-exchangers

Cited by 21 publications

References 16 publications

Thermal-Hydraulic Characteristics of the Liquid-Based Battery Thermal Management System with Intersected Serpentine Channels

Thermal-Hydraulic Characteristics of the Liquid-Based Battery Thermal Management System with Intersected Serpentine Channels

Design Optimization of Plate-Fin Heat Exchanger in a Gas Turbine and Supercritical Carbon Dioxide Combined Cycle with Thermal Oil Loop

Heat transfer and pressure drop characteristic research of sine wavy flying-wing fins

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