THERMAL SCIENCE

International Scientific Journal

Song Li

,

Jiangbo Wu

,

Xiaoze Du

,

Haonan Dong

,

Zhibin Yu

STUDY ON HEAT TRANSFER CHARACTERISTICS OF SUPERCRITICAL CO2 PRINTED CIRCUIT HEAT EXCHANGERS WITH DIFFERENT SHAPE CHANNELS

ABSTRACT
Printed circuit heat exchanger is a micro-channel heat exchanger. Because of its high efficiency, high pressure and high temperature resistance, it has been widely used in photovoltaic power generation, nuclear energy and other fields. In particular, the research on the cross-section shape of heat exchanger channel has been widely concerned by researchers. In this paper, the printed circuit heat exchanger performance of semi-circular, square and trapezoidal channels with the same inlet and outlet area is compared under the pressure of 8 MPa. The heat transfer performance of the mass-flow rate in the range of 500-2000 kg/m2 under three cross-section shapes was investigated. The results show that the heat transfer effect of fluid in the trapezoidal channel is obviously better than the other two channels. This is mainly because the heat exchange contact area of cold and hot fluids in the trapezoidal channel is large, resulting in an increase in heat exchange between cold and hot fluids. When the inlet velocity is the same, the Reynolds number of the fluid in the trapezoidal channel is larger. The outlet temperature of the cold fluid in the trapezoidal channel is 7.9% higher than that in the semi-circular channel and 4.1% higher than that in the rectangular channel. The outlet temperature of the hot fluid in the trapezoidal channel is 6.28% lower than that in the semi-circular interface channel and 3.4% lower than that in the square channel. The trapezoidal channel printed circuit heat exchanger has better heat transfer effect and better heat transfer performance.
KEYWORDS
supercritical carbon dioxide, numerical simulation, printed circuit heat exchanger, thermal hydraulic performance
PAPER SUBMITTED: 2024-01-10
PAPER REVISED: 2024-04-28
PAPER ACCEPTED: 2024-05-06
PUBLISHED ONLINE: 2024-08-18
DOI REFERENCE: https://doi.org/10.2298/TSCI240110157L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 5, PAGES [3979 - 3994]
REFERENCES
  1. Cheng, K., et al., Experimental Exergy Analysis of a Printed Circuit Heat Exchanger for Supercritical Carbon Dioxide Brayton Cycles, Applied Thermal Engineering, 192 (2021), 116882
  2. Manjunath, K., et al., Entropy Generation and Thermoeconomic Analysis of Printed Circuit Heat Ex­changer Using Different Materials for Supercritical CO2 Based Waste Heat Recovery, Materials Today: Proceedings, 21 (2020), Part 3, pp. 1525-1532
  3. Serrano, I. P, et al., Modelling and Sizing of the Heat Exchangers of a New Supercritical CO2 Brayton Power Cycle for Energy Conversion for Fusion Reactors, Fusion Engineering and Design, 89 (2014), 9-10, pp. 1905-1908
  4. Nikitin, K., et al., Printed Circuit Heat Exchanger Thermal-Hydraulic Performance in Supercritical CO2 Experimental Loop, International Journal of Refrigeration, 29 (2006), 5, pp. 807-814
  5. Morteza, K.-A., et al., The CFD Study of Rib-Enhanced Printed Circuit Heat Exchangers for Precoolers in Solar Power Plants' Supercritical CO2 Cycle, Energy, 292 (2024), 1, pp. 657- 669
  6. Morteza, K.-A., et al., Optimal Combination of Converging and Diverging Minichannels in PCHE as Precooler under Diverse Operating Conditions of Supercritical CO2, Energy, 272 (2023), 2, pp. 849-865
  7. Seo, H., et al., Design and Performance Analysis of a Supercritical Carbon Dioxide Heat Exchanger, Applied Sciences, 10 (2020), 13, 10134545
  8. Cui, X., et al., Numerical Study on Novel Airfoil Fins for Printed Circuit Heat Exchanger Using Super­critical CO2, International Journal of Heat and Mass Transfer, 121 (2018), June, pp. 354-366
  9. Aneesh, A. M., et al., Effects of Wavy Channel Configurations on Thermal-Hydraulic Characteristics of Printed Circuit Heat Exchanger (PCHE), International Journal of Heat and Mass Transfer, 118 (2018), Mar., pp. 304-315
  10. Jeon, S., et al., Thermal Performance of Heterogeneous PCHE for Supercritical CO2 Energy Cycle, Inter­national Journal of Heat and Mass Transfer, 102 (2016), Nov., pp. 867-876
  11. Kim, W., et al., A Mathematical Correlation for Predicting the Thermal Performance of Cross, Paral­lel, and Counterflow PCHE, International Journal of Heat and Mass Transfer, 106 (2017), Mar., pp. 1294-1302
  12. Shin, J.-H., Yoon, S. H., Thermal and Hydraulic Performance of a Large-Scale Printed Circuit Heat Ex­changer (PCHE), Case Studies in Thermal Engineering, 35 (2022), 4, pp. 1023-1030
  13. Zhou, K., et al., Design and Performance Analysis of a Supercritical CO2 radial Inflow Turbine, Applied Thermal Engineering, 167 (2020), 114757
  14. Saeed, M., et al., Performance Enhancement of a C-Shaped Printed Circuit Heat Exchanger in Super­critical CO2 Brayton Cycle: A Machine Learning-Based Optimization Study, Case Studies in Thermal Engineering, 38 (2022), 102276
  15. Wu, J., Xiao, J., Numerical Study of Crossed Airfoil Fins in a Printed Circuit Heat Exchanger, Applied Thermal Engineering, 230 (2023), 120646
  16. Khoshvaght-Aliabadi, M., et al., Predicting Heat Transfer and Flow Features of Supercritical CO2 in Printed Circuit Heat Exchangers with Novel Wavy Minichannels, International Journal of Heat and Mass Transfer, 196 (2022), 123232
  17. Eskandari Manjili, F., Cheraghi, M., Performance of a New Two-Stage Transcritical CO2 Refrigeration Cycle with Two Ejectors, Applied Thermal Engineering, 156 (2019), June, pp. 402-409
  18. Sun, R., et al., Thermodynamic Optimization on Supercritical Carbon Dioxide Brayton Cycles to Achieve combined Heat and Power Generation, Energy Conversion and Management, 251 (2022), 1, pp. 435-449
  19. Vallis, A., et al., Thermodynamic Analysis and Optimization of a Dual-Loop Regenerative Supercritical CO2 Brayton Cycle/ORC System Coupled to the Main Diesel Engine of a Bulk Carrier, Proceedings, 2020 Virtual Annual Meeting of Marine Technology, Hellenic Institute of Marine Technology, Chicago, Ill., USA, 2020
  20. Schoffer, S. I., et al., A Solid Oxide Fuel Cell- Supercritical Carbon Dioxide Brayton Cycle Hybrid Sys­tem, Applied Energy, 283 (2021), 115748
  21. Wang, Y., et al., Assessment on Energy and Exergy of Combined Supercritical CO2 Brayton Cycles with Sizing Printed-Circuit-Heat-Exchangers, Energy, 263 (2023), 3, pp. 72-91
  22. Zhou, X., et al., Numerical study on Thermal-Hydraulic Performance of Hydrocarbon Fuel under Trans-Critical States and Supercritical CO2 in a zigzag Printed Circuit Heat Exchanger, Applied Thermal Engineering, 236 (2024), 121496
  23. Chen, M., et al., Experimental and Numerical Study of a Printed Circuit Heat Exchanger, Annals of Nu­clear Energy, 97 (2016), Nov., pp. 221-231
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Study on heat transfer characteristics of supercritical CO2 printed circuit heat exchangers with different shape channels

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence