Thermo-Hydraulic Performance of Printed Circuit Heat Exchanger With Different Cambered Airfoil Fins

Chu, Woei Chyn; Bennett, Katrine; Cheng, Jie; Chen, Yitung; Wang, Qiuwang

doi:10.1080/01457632.2018.1564203

Cited by 32 publications

(4 citation statements)

References 27 publications

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“…Different channels have been investigated, including straight channels [5][6][7], zigzag channels [8][9][10], sinusoidal channels [11][12][13][14], S-shaped channels [15,16], helical twine PCHE [17], and channels with airfoil fins [18][19][20][21][22]. Zhao et al [23] proposed the Fanning friction factor in the straight channel PCHE by numerical calculation.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on thermal-hydraulic performance of cryogenic LNG in sinusoidal channel with airfoil fins under marine dynamic load

Tian,

Chen,

Zhao

et al. 2024

Preprint

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For floating liquefied natural gas (FLNG), printed circuit heat exchanger (PCHE) is an optimal choice owing to its compactness and large temperature difference heat transfer in a short time. In this study, a novel sinusoidal channel configuration was established which is with airfoil fins, and its thermal-hydraulic performance was numerically studied. The Nusselt number and Fanning friction factor were studied. Meanwhile, the effects of marine dynamic load and inlet mass flow rate (IMFR) on the novel configuration were studied by numerical simulation. Considering the application scenarios of the PCHE, the supercritical LNG (S-LNG) with 113.15 K and 32 MPa was the cold fluid, and the ethylene glycol with 293.15 K and 0.1 MPa was the hot fluid. The results show that the novel configuration has better comprehensive performance. The local turbulent kinetic energy of the novel configuration is improved by about 19.78%. The temperature and velocity uniformity are improved. Marine dynamic load deteriorates the comprehensive performance of the novel configuration. With the increasing of the IMFR, the outlet temperature for S-LNG gradually decreases from 240.65 K to 186.70 K, while the pressure drop and turbulent kinetic energy increase from 6969.72 Pa to 23225.75 Pa and 0.0256 m2/s2 to 0.12874 m2/s2, respectively. This work can provide valuable guidance for PCHE under cryogenic and supercritical pressure working condition in engineering applications.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation on thermal-hydraulic performance of cryogenic LNG in sinusoidal channel with airfoil fins under marine dynamic load

Tian,

Chen,

Zhao

et al. 2024

Preprint

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show abstract

“…The results showed that the fin configurations had little effect on the overall thermo-hydraulic performances at low mass flow rates, and the airfoil fin with the staggered arrangement was better than the other types of fins. Chu et al [16] studied three types of airfoil fin (NACA-8315, 8515, and 8715) PCHEs with consistent and reverse layouts used as condensers in the supercritical CO 2 Brayton power cycle. The results showed that the NACA-8515 airfoil fins with both consistent and reverse layouts on average improved the heat transfer coefficient by 28% and 11% with an increase of the pressure drop by 150% and 22%, respectively, compared with the symmetrical airfoil fins (NACA-0015).…”

Section: Introductionmentioning

confidence: 99%

Parametric Study on Thermo-Hydraulic Performance of NACA Airfoil Fin PCHEs Channels

Wang

Ding

Han³

et al. 2022

Energies

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In this work, a discontinuous airfoil fin printed circuit heat exchanger (PCHE) was used as a recuperator in a micro gas turbine system. The effects of the airfoil fin geometry parameters (arc height, maximum arc height position, and airfoil thickness) and the airfoil fin arrangements (horizontal and vertical spacings) on the PCHE channel’s thermo-hydraulic performance were extensively examined by a numerical parametric study. The flow features, local heat transfer coefficient, and wall shear stress were examined in detail to obtain an enhanced heat transfer mechanism for a better PCHE design. The results show that the heat transfer and flow resistance were mainly increased at the airfoil leading edge owing to a flow jet, whereas the airfoil trailing edge had little effect on the thermo-hydraulic performance. The airfoil thickness was the most significant while the arc height and the vertical spacing were moderately significant to the performance. Moreover, only the airfoil thickness had a significant effect on the PCHE compactness. Based on a comprehensive investigation, two solutions NACA-6230 and -3220 were selected owing to their better thermal performance and smaller pressure drop, respectively, with horizontal spacings of 2 mm and vertical spacings of 2 or 3 mm.

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“…In general, PCHEs are manufactured by photochemical etching [6] and diffusion bonding technologies, and are able to reliably operate in large temperature ranges (from 73 K to 1173 K) and high pressure conditions (up to 60 MPa) [7]. To date, there are several flow channel geometries developed for PCHEs, e.g., straight channels [8][9][10], zigzag channels [11][12][13], wavy channels [14-16], S-shaped channels [17,18] and channels with airfoil fins [19][20][21], while the performance of different channels has been extensively studied. However, mechanical performance is a key concern for PCHEs, and mechanical design of PCHEs is largely concerned with the particular surface geometry.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Analysis in a Zigzag Channel Printed Circuit Heat Exchanger under Different Conditions

Tang

Yang

Pan

et al. 2021

Heat Transfer Engineering

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In this study, the effect of axial heat conduction on thermal performance in a zigzag channel printed circuit heat exchanger (PCHE) with supercritical liquefied natural gas as the working fluid is studied by a numerical method under different conditions. The influence factors include Reynolds number, operating pressure, inlet temperatures of the cold side, and wall thermal conductivity. The results indicate that the axial heat conduction can greatly affect the thermal performance of the PCHE at low Reynolds numbers but decrease it at high Reynolds numbers for different working conditions. At the same average Reynolds number, the thermal performance of the PCHE decreases as the pressure increases, and the inlet temperature of 195 K provides the best thermal performance while the inlet temperature of 220 K is the worst among the three different inlet temperatures of the cold side. Furthermore, the reduction of wall thermal conductivity can improve the thermal performance of the PCHE due to the influence of axial heat conduction in the separation wall.

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Thermo-Hydraulic Performance of Printed Circuit Heat Exchanger With Different Cambered Airfoil Fins

Cited by 32 publications

References 27 publications

Numerical investigation on thermal-hydraulic performance of cryogenic LNG in sinusoidal channel with airfoil fins under marine dynamic load

Numerical investigation on thermal-hydraulic performance of cryogenic LNG in sinusoidal channel with airfoil fins under marine dynamic load

Parametric Study on Thermo-Hydraulic Performance of NACA Airfoil Fin PCHEs Channels

Thermal Performance Analysis in a Zigzag Channel Printed Circuit Heat Exchanger under Different Conditions

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