Heat transfer behavior of an immersed tube with sCO2 working fluid in a hot fluidized bed at high pressure

被引：2

作者：

Huang, Yu ^{[1
]}

Bao, Xu ^{[1
]}

Duan, Yuanqiang ^{[1
]}

Li, Lin ^{[1
]}

Fang, Dongdong ^{[1
]}

Wang, Yueming ^{[1
]}

Duan, Lunbo ^{[1
]}

机构：

[1] Southeast Univ, Sch Energy & Environm, Key Lab Energy Thermal Convers & Control, Minist Educ, Nanjing, Peoples R China

来源：

FUEL | 2023年 / 333卷

基金：

中国国家自然科学基金;

关键词：

Immersed tube; Pressurized fluidized bed; Heat transfer model; SupercriticalCO2; Oxy-firing; SUPERCRITICAL CARBON-DIOXIDE; HORIZONTAL TUBE; TRANSFER COEFFICIENT; CO2; TEMPERATURE; PARTICLES; HYDRODYNAMICS; COMBUSTION; VELOCITY; SOLIDS;

D O I：

10.1016/j.fuel.2022.126457

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：

In this work, a pilot-scale pressurized fluidized bed test rig was built to test the heat transfer performance be-tween the supercritical CO2 (sCO2) loaded immersed tube with the dense bed. Results showed that the bed-to-tube heat transfer coefficient (HTC) in CO2 atmosphere was slightly larger than that in air atmosphere. The HTC increased with the increase of pressure and bed temperature, respectively. The increase of pressure did not change the circumferential distribution of HTC, but the increase of fluidization number improved it. A bed-to-tube heat transfer model was proposed on the basis of the partial heat penetration theory with the accuracy in +/- 25 %. For the heat transfer of sCO2 within the immersed tube deteriorated due to the buoyancy effect.

引用

页数：10

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