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Study on heat transfer characteristics and critical heat flux prediction model of carbon dioxide under subcritical pressure
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Qingjiang LIU, Xianliang LEI, Ji’an LIU
Thermal Power Generation | 2023, 52(11) : 29 - 36
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Thermal Power Generation | 2023, 52(11): 29-36
• Special topic on supercritical carbon dioxide cycle power generation technology •
Study on heat transfer characteristics and critical heat flux prediction model of carbon dioxide under subcritical pressure
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Qingjiang LIU, Xianliang LEI, Ji’an LIU
Affiliations
  • State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University, Xi’an 710049, China
Published: 2023-11-25 doi: 10.19666/j.rlfd.202301011
Outline
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The carbon dioxide (CO2) Brayton cycle system is compact, efficient and flexible, and has a good application prospect in the third generation photothermal system and the fourth generation nuclear power system. The deterioration of CO2 heat transfer affects the safe operation of the unit. In order to study the deterioration of CO2 heat transfer in the vertical riser, a CO2 heat transfer characteristic system is established for experimental research, and the CO2 heat transfer characteristics under subcritical and supercritical conditions are compared. The influence of thermal parameters on the deterioration of CO2 heat transfer is obtained, and the prediction correlation of CO2 critical heat flux is established. The predicted value is in good agreement with the experimental value (error ±30%). It is found that the peak value of wall temperature is higher when CO2 heat transfer deteriorates at subcritical pressure. Far away from the critical pressure and increasing the mass flow rate are conducive to restraining the occurrence of heat transfer deterioration.

carbon dioxide  /  heat transfer deterioration  /  critical heat flux  /  prediction correlation
Qingjiang LIU, Xianliang LEI, Ji’an LIU. Study on heat transfer characteristics and critical heat flux prediction model of carbon dioxide under subcritical pressure[J]. Thermal Power Generation, 2023 , 52 (11) : 29 -36 . DOI: 10.19666/j.rlfd.202301011
Funding
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  • National Natural Science Foundation(U1867218)
  • Energy Security Technology Project of China Huaneng Group Co., Ltd.(HNKJ20-H87-04)
Appendix
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Year 2023 volume 52 Issue 11
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157
72
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Article Info
doi: 10.19666/j.rlfd.202301011
  • Receive Date：2023-01-31
  • Online Date：2026-01-26
  • Published：2023-11-25
Article Data
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History
  • Received：2023-01-31
Funding
National Natural Science Foundation(U1867218)
Energy Security Technology Project of China Huaneng Group Co., Ltd.(HNKJ20-H87-04)
Affiliations
    State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University, Xi’an 710049, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202301011
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光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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