Flow and Heat Transfer Characteristics of S-CO2 in a Vertically Rising Y-Tube

被引：1
作者：
Hao, Xiaohong [1 ]
Du, Su [1 ]
Yang, Qiguo [1 ]
Zhang, Sen [1 ]
Zhang, Qi [1 ]
机构：
[1] Univ Shanghai Sci & Technol, Sch Energy & Power Engn, Inst Adv Power Equipment & Technol, Shanghai 200093, Peoples R China
来源：
ENERGIES | 2022年 / 15卷 / 09期
关键词：
supercritical CO2; heat transfer characteristics; numerical simulation; SUPERCRITICAL CO2; EXERGY; CYCLES; WATER;
D O I：
10.3390/en15093312
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The supercritical carbon dioxide Brayton cycle has gradually become a research focus, but we also see a deficiency in research related to the flow and heat transfer characteristics of S-CO2 boiler staves with high parameters. In this paper, the flow and heat transfer of supercritical carbon dioxide is investigated in a 1000 MW supercritical boiler cooled wall tube in the parameters of a pressure of 30.42 MPa, a mass flux of 1592--2207 kg/(m(2).s), and a heat flux of 39.8 similar to 71.2 kw/m(2); a three-dimensional model of supercritical CO2 fluid in the cooling wall tube is established with the RNG k-epsilon turbulence model. Numerical simulations are carried out according to the following boundary conditions: an adiabatic half side, a heated half side, and a Y-type three-way two-to-one. The effects of the mass flux, inlet temperature, and heat flux on the flow and heat transfer characteristics in the Y-tube are analyzed, which exerts great influence on the research of S-CO2 boiler stave thermodynamics.
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页数：15
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