Numerical study on novel airfoil fins for printed circuit heat exchanger using supercritical CO2

Cui, Xinying; Guo, Jiangfeng; Huai, Xiulan; Cheng, Ke; Zhang, Haiyang; Xiang, Mengru

doi:10.1016/j.ijheatmasstransfer.2018.01.015

Cited by 166 publications

(25 citation statements)

References 44 publications

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“…The total entransy is always dissipated in isolated systems, and the entransy dissipation could measure the irreversibility in heat transfer processes. 28,29 Until now, the entransy and entransy dissipation have been applied to the analysis of heat conduction, 30 heat convection, 31,32 heat exchanger, [33][34][35] heat storage system, 36,37 chemical heat pump, 38,39 etc.…”

Section: Evaluation Of Heat Transfer and Whr Systemmentioning

confidence: 99%

Analysis of two‐stage waste heat recovery based on natural gas‐fired boiler

et al. 2019

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Summary Waste heat recovery (WHR) is crucial to the efficiency improvement of natural gas‐fired boiler systems. Two‐stage WHR systems based on the natural gas‐fired boiler were analyzed from the viewpoints of thermal efficiency and heat transfer irreversibility. An overall entransy dissipation‐based thermal resistance was derived to evaluate the irreversibility of WHR, including the entransy dissipations during condensation and in absorption heat pump (AHP). Compared with the basic WHR system, the two‐stage WHR systems have higher boiler efficiency and less irreversibility. The air‐humidified system recycles both the heat and vapor in flue gas, while the unutilized latent heat in the recovered vapor causes the boiler to be less efficient than the AHP system. Investigation on heat exchanger effectiveness of two‐stage WHR systems illustrated: in the two‐stage WHR system with air humidification, the increasing effectiveness of both heat exchangers could effectively increase boiler efficiency and reduce heat transfer irreversibility. In the two‐stage WHR system with AHP, boiler efficiency has a local optimum when the dew point occurs near the outlet of the first heat exchanger; increasing the second heat exchanger effectiveness is more efficient in improving boiler efficiency. The present work may provide available references and guidance for the design and optimization of the two‐stage WHR systems.

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Section: Evaluation Of Heat Transfer and Whr Systemmentioning

confidence: 99%

Analysis of two‐stage waste heat recovery based on natural gas‐fired boiler

et al. 2019

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“…2. The Reynolds number (Re) is an important dimensionless quantity in flow analysis used to help predict flow patterns in different fluid flow situations [12][13][14][15][16][17][18]. The flow unites with the airfoil on the leading edge and detaches on the trailing edge.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

A comparative CFD analysis of NACA0012 and NACA4412 airfoils

Yılmaz

Köten

Çetinkaya

et al. 2018

Journal of Energy Systems

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Wind energy has been seen as one of the most suitable sources of renewable energy. Wind energy is low cost when compared the other sources. Therefore, wind energy can gain an edge over the fossil-fired power plants. Aerodynamic efficiency of the airfoil is very crucial for aerodynamic efficiency of the wind turbine. The primary purpose of our study was to analyze the NACA0012 and NACA4412 airfoil at various attack angles with constant Reynolds number and to examine the effects of the symmetrical and asymmetrical profiles of the airfoil. Analysis of aerodynamic performance of NACA0012 and NACA4412 airfoil were performed with using ANSYS Fluent program. Also, lift coefficients and drag coefficients were calculated at various attack angles. According to calculations, optimum attack angles were found for each profile. Finally, NACA0012 and NACA4412 airfoils were discussed and reported in terms of their airfoil performances.

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“…channels, zigzag channels, S-shaped channels and channels with airfoils. Table1lists references about the thermal and hydraulic performance of PCHEs with different configurations[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. From the above review, it is concluded that compared with the straight channels, the heat transfer performance may be enhanced by non-straight channels, especially channels with airfoil fins.…”

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confidence: 99%

Investigation on Thermal-Hydraulic Performance in a Printed Circuit Heat Exchanger with Airfoil and Vortex Generator Fins for Supercritical Liquefied Natural Gas

Tang

Pan

Sundén

2020

Heat Transfer Engineering

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In this study, the thermal and hydraulic performances of six different printed circuit heat exchanger (PCHE) configurations with supercritical liquefied natural gas as the working fluid are studied by a numerical method. Firstly, the thermal and hydraulic performances of the PCHE with airfoil fins are investigated at different operating pressures, which indicate that the PCHE with airfoil fins has better thermal performance but worse hydraulic performance when it operates at higher pressure condition. Furthermore, the effects of different PCHE configurations on the thermal and hydraulic performances are analyzed in detail. The results show that delta vortex generators (VGs) arranged upstream the airfoils can provide better thermal performance than VGs arranged downstream the airfoils, and the thermal performance of the common-flow-up configuration is not always better than the common-flowdown configuration. Finally, the overall heat transfer performance of PCHEs is evaluated by the volume goodness criterion under the same mass flow rate. The results show that the straight channel PCHE with front common-flow-up delta VG and airfoil fins has the best volume goodness factor among the six PCHE configurations.

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Numerical study on novel airfoil fins for printed circuit heat exchanger using supercritical CO2

Cited by 166 publications

References 44 publications

Analysis of two‐stage waste heat recovery based on natural gas‐fired boiler

Analysis of two‐stage waste heat recovery based on natural gas‐fired boiler

A comparative CFD analysis of NACA0012 and NACA4412 airfoils

Investigation on Thermal-Hydraulic Performance in a Printed Circuit Heat Exchanger with Airfoil and Vortex Generator Fins for Supercritical Liquefied Natural Gas

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