Study on hydraulic and thermal performance of printed circuit heat transfer surface with distributed airfoil fins

Chu, Woei Chyn; Li, Xionghui; Ma, Ting; Chen, Yitung; Wang, Qiuwang

doi:10.1016/j.applthermaleng.2016.11.187

Cited by 102 publications

(10 citation statements)

References 16 publications

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“…An experiment conducted by Ma et al [18] explored the character of the fin-endwall fillet, and they found that the overall performance is improved when the nondimensional longitudinal pitch is 1.63. Chu et al [19] studied the influence of fin shape on PCHE. They pointed out that a fin with a larger windward area and shorter length has better overall performance.…”

Section: Figure 1 Schematic Diagram Of Sco 2 Cycle Cooling Systemmentioning

confidence: 99%

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Performance study on a printed circuit heat exchanger composed of novel airfoil fins for supercritical CO2 cycle cooling system

Hou

Wang

2023

THERM SCI

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The printed circuit heat exchanger (PCHE) plays a vital role in the supercritical carbon dioxide cooling system for hypersonic aircraft, which significantly affects the efficiency and stability of the cooling system. In this study, a novel structure is proposed to improve the overall performance of airfoil fin PCHEs. RP-3 aviation kerosene and SCO2 are used as working fluids to study the thermal-hydraulic performance and the enhancement mechanism. The results indicate that the overall performance of the PCHE can be improved by slotting the airfoil fin. With the increase in groove thickness, the thermal performance of the new airfoil fin PCHE first improves and then worsens, while the hydraulic performance of the PCHE first worsens and then improves. Compared with the original airfoil fin, the fin with a groove thickness of 0.6 mm reduces the pressure drop by up to 15% without affecting the thermal performance, while the fin with a groove thickness of 0.1 mm increases the heat transfer by 4%-5%. In addition, the optimal mass flow ratio of SCO2 to kerosene is obtained by thermal resistance matching under different working conditions, which is helpful for the design and optimization of airfoil fin PCHEs based on the SCO2 cycle cooling system for scramjets.

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Section: Figure 1 Schematic Diagram Of Sco 2 Cycle Cooling Systemmentioning

confidence: 99%

“…Compared with other turbulence models, the SST turbulence model [17,19] combines the advantages of the k-ε and k-ω models, which is more accurate when simulating the flow and thermal characteristics of SCO 2 . The SST turbulence model was chosen as the turbulence model.…”

Section: Governing Equations and Parameter Definitionsmentioning

confidence: 99%

Performance study on a printed circuit heat exchanger composed of novel airfoil fins for supercritical CO2 cycle cooling system

Hou

Wang

2023

THERM SCI

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“…It is found that the strong change of thermophysical properties of S-CO 2 leads to the gradual decrease of local thermal performance along the flow direction, but the local flow resistance is basically unchanged. Chu et al [126], based on the data of numerical simulation, put forward the fitting correlation of j and f with Re (8000 < Re < 100,000). The results show that large windward area and short length can obtain better thermal-hydraulic performance.…”

Section: Pche With Airfoil Fin Channelsmentioning

confidence: 99%

A Review on the Thermal-Hydraulic Performance and Optimization of Compact Heat Exchangers

Liao

Zhang

et al. 2021

Energies

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Heat exchangers play an important role in power, the chemical industry, petroleum, food and many other industrial productions, while compact heat exchangers are more favored in industrial applications due to their high thermal efficiency and small size. This paper summarizes the research status of different types of compact heat exchangers, especially the research results of heat transfer and pressure drop of printed circuit heat exchangers, so that researchers can have an overall understanding of the development of compact heat exchangers and get the required information quickly. In addition, this paper summarizes and analyzes several main working fluids selected in compact heat exchangers, and puts forward some discussions and suggestions on the selection of working fluids. Finally, according to the existing published literature, the performance evaluation indexes of compact heat exchangers are summarized and compared, which is convenient for developers and researchers to better grasp the design direction.

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“…The results showed that all the proposed designs more or less improve the uniform flow distribution between the channels. Chu [11] analyzed four different inlet headers and proposed an improved header that significantly reduced flow inhomogeneity. Ma [12] established a new prediction model to predict the uneven flow distribution in PCHEs and found that an increase in the channel length could improve the uneven flow distribution.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of the Inlet Header Structure in Microchannel Heat Exchanger Based on Flow Distribution Uniformity

et al. 2022

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The flow distribution in a printed circuit heat exchanger (PCHE) is of great theoretical and practical significance in the Brayton cycle power generation system. For the straight barrel inlet header PCHE, when S-CO2 flows in the PCHE, the structural types and working parameters of the inlet header and diversion zone may lead to differences in the flow distribution in each channel of the PCHE. This flow distribution difference affects the thermal hydraulic characteristics of the PCHE. A numerical simulation method was applied to explore the flow uniformity of the PCHE and the overall performance and analyze the influence of the type of straight barrel inlet header PCHE. Within each layer, the flow showed an uneven flow distribution, and the optimized inlet header was the tapered type. The results showed that when the taper angle varies from 6° to 9°, the flow distribution in each layer is relatively uniform. The comprehensive heat transfer performance of the straight-channel PCHE can be improved by 17.3–19.7%. Finally, the response surface and a genetic algorithm were combined to optimize the inlet header. The heat transfer performance of the optimized PCHE was improved by 19.7%.

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Study on hydraulic and thermal performance of printed circuit heat transfer surface with distributed airfoil fins

Cited by 102 publications

References 16 publications

Performance study on a printed circuit heat exchanger composed of novel airfoil fins for supercritical CO2 cycle cooling system

Performance study on a printed circuit heat exchanger composed of novel airfoil fins for supercritical CO2 cycle cooling system

A Review on the Thermal-Hydraulic Performance and Optimization of Compact Heat Exchangers

Design and Optimization of the Inlet Header Structure in Microchannel Heat Exchanger Based on Flow Distribution Uniformity

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