Design Analysis of Internal Heat Exchanger of Transcritical CO2 Ice-Making System

Yumeng Wu; Zhenying Zhang

doi:10.6919/ICJE.202504_11(4).0029

Authors

Yumeng Wu
Zhenying Zhang

DOI:

https://doi.org/10.6919/ICJE.202504_11(4).0029

Keywords:

Carbon Dioxide; Internal Heat Exchanger; Refrigeration Cycle.

Abstract

This study investigates the internal heat exchangers in transcritical CO₂ refrigeration ice-making systems. A numerical model combining the distribution parameter method is developed to simulate heat transfer and pressure drop. Various pipe diameter combinations are compared to determine their required tube lengths and CO₂pressure drops on both high and low-pressure sides under given heat load conditions. Results indicate that Scheme 4 achieves the desired heat load with a shorter tube length (0.49 m) and lower high-pressure-side CO₂ pressure drop (3.6 kPa). This study provides a theoretical basis for optimizing internal heat exchangers to enhance the performance of transcritical CO₂ systems.

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References

[1] H. K. Teng, M. Zhu, L. Yan: Science and technology to help the Winter Olympics: the establishment and development of intelligent ice rink in China, Ice and Snow Sports,vol. 44 (2022), No. 2, p.1-6.

[2] D. J. Wu, J. Hu, Y. Li: Effect of heat recovery on the transcritical CO2 jet refrigeration system, Food and Machinery, vol. 40 (2024), No. 1, p.82-89.

[3] D. R. Lu: Analysis of the influence of the return heater on the performance of the automobile air conditioning system (MS., Jilin University, China 2019), p.1-26.

[4] Žiga A, Jierong L, Kurt E, et al: Thermo-hydraulic evaluation of oscillating-flow shell- and-tube-like regenerators for (elasto)caloric cooling, Applied Thermal Engineering, vol. 190 (2021).

[5] X. Y. Zhang: Structure optimization of a supercritical CO2 internal heat exchanger with high efficiency and low resistance (MS., Hebei University of Technology, China 2022), p.15-56.

[6] T. Y. Xiao: Study on the performance of the open and closing switching heat pump drying system with internal heat exchanger (MS., Shanxi University of Technology,China 2024), p.21-45.

[7] X. Y. Liu: Simulation and analysis of air conditioning system with internal heat exchanger, Enterprise Technology and Development, 2023, No. 6, p. 27-30.

[8] Y. T. Wu: Study on the performance of double-temperature refrigeration system of CO2 multi-link incident system with internal heat exchanger (MS., Tianjin University of Commerce, 2022), p.1-40.

[9] Y. F. Liu,L. L. Zhu,C. Y. Lu, et al. Study on the influence of the return heater on the heating performance of the CO2 parking air conditioning system, Agricultural Equipment and Vehicle Engineering,vol.62 (2024), No. 5, p.28-32.

[10] M. M. Xie, X. Guan, X. B. Dang: CO2 Design and experimental study of the gas cooler, Chemical Engineering, vol. 42 (2014), No. 11, p.56-60.

[11] GNIELINSKI V: New equations for heat and mass transfer in turbulent pipe and channel flow, International chemical engineering, vol. 16 (1976), No. 2, p.359-367.

[12] Momeni H, Keshtkar M M: Thermodynamic, economic, and environmental comparison between the direct and indirect CO2 refrigeration cycle with conventional indirect NH3 cycle with considering a heat recovery system in an ice rink: a case study, Journal of Energy Resources Technology, vol. 142 (2020), No. 1, p.012002.

[13] FOURIE M: A subcritical and transcritical carbon dioxide refrigeration system utilizing multiple expansion devices (MS., Faculty of Engineering at Stellenbosch University, Stellenbosch 2014), p.1-2.

[14] F. Liang: Steady-state simulation study of a transcritical CO2 refrigeration system (Dalian University of Technology, China 2022), p.1-48.

[15] Bellos Evangelos, Lykas Panagiotis, Tzivanidis Christos: Thermodynamic investigation of a novel organic Rankine cycle including partial evaporation, dual-phase expander, flash tank, dry expander and recuperator for waste heat recovery, Thermal Science and Engineering Progress, vol. 46 (2023), p.102224.

[16] Y Liu, C.Y. Tian: Two-stage compression across the critical CO2 refrigeration cycle with expander and internal heat exchanger study, Energy saving, vol. 42 (2023), No. 4, p.40-44.

[17] X. D. Geng, Y. M. Wu, X. H. Zhou, et al: Simulation analysis of heat recovery heat ex-changer performance for transcritical CO2 refrigeration system, Refrigeration and air conditioning, vol. 23 (2023), No. 4, p.82-87.