Supercritical CO2 flow instability in natural circulation loop: CFD analysis

被引：25

作者：

Wahidi, Tabish ^{[1
]}

Chandavar, Rajat Arunachala ^{[1
]}

Yadav, Ajay Kumar ^{[1
]}

机构：

[1] Natl Inst Technol Karnataka, Dept Mech Engn, Adv Heat Transfer Lab, Mangalore 575025, India

来源：

ANNALS OF NUCLEAR ENERGY | 2021年 / 160卷 / 160期

关键词：

Supercritical CO2; Instability; Rectangular natural circulation loop; Flow transition; Computational fluid dynamics; CARBON-DIOXIDE; STEADY-STATE; HEAT-TRANSFER; STABILITY CHARACTERISTICS; OSCILLATORY INSTABILITY; TRANSIENT ANALYSIS; RECTANGULAR LOOP; CONVECTION; PRESSURE; BEHAVIOR;

D O I：

10.1016/j.anucene.2021.108374

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Three-dimensional computational fluid dynamics (CFD) simulation on a supercritical CO2 based natural circulation loop (scCO(2)-NCL) is carried out to explore the effects of various parameters (i.e., pressure and heat inputs) on the loop's transient and stability behaviour. Results show that for supercritical CO2, there is a threshold point that decides the flow's nature. Lower than threshold heat inputs flow shows repetitive-reversal flow while at higher heat input the flow changes to stable or single-direction flow. With an increase in heat input, the system attains stability for a given operating pressure. In addition, a possible mechanism for continuous flow oscillation and measurement of instability with different pressure in unstable loops is also proposed in this study. It is found that the Nusselt number decreases with an increase in operating pressure for given heat input. Obtained simulation results are validated with the two existing correlations and found a good agreement. (C) 2021 Elsevier Ltd. All rights reserved.

引用

页数：14

共 60 条

[1] Effect of Pressure on Steady State and Heat Transfer Characteristics in Supercritical CO2 Natural Circulation Loop [J].

Archana, V ;

Vaidya, A. M. ;

Vijayan, P. K. .

INTERNATIONAL CONFERENCE ON COMPUTATIONAL HEAT AND MASS TRANSFER (ICCHMT) - 2015, 2015, 127 :636-644

[2] Numerical modeling of supercritical CO2 natural circulation loop [J].

Archana, V. ;

Vaidya, A. M. ;

Vijayan, P. K. .

NUCLEAR ENGINEERING AND DESIGN, 2015, 293 :330-345

[3] Interaction of pharmaceutical hydrates with supercritical CO2 -: Solubility, solid-state and chemical modifications [J].

Bettini, R ;

Bertolini, G ;

Frigo, E ;

Rossi, A ;

Casini, I ;

Pasquali, I ;

Giordano, F .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2004, 77 (02) :625-638

[4] Deposition of conformal copper and nickel films from supercritical carbon dioxide [J].

Blackburn, JM ;

Long, DP ;

Cabañas, A ;

Watkins, JJ .

SCIENCE, 2001, 294 (5540) :141-145

[5] Stability of supercritical fluid flow in a single-channel natural-convection loop [J].

Chatoorgoon, V .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2001, 44 (10) :1963-1972

[6] ON THE OSCILLATORY INSTABILITY OF CLOSED-LOOP THERMOSIPHONS [J].

CHEN, K .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1985, 107 (04) :826-832

[7]

Chen L., 2014, J HEAT TRANSF, V136

[8] Simulation of Heat Transfer and System Behavior in a Supercritical CO2 Based Thermosyphon: Effect of Pipe Diameter [J].

Chen, Lin ;

Zhang, Xin-Rong .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 2011, 133 (12)

[9] Effect of heat transfer on the instabilities and transitions of supercritical CO2 flow in a natural circulation loop [J].

Chen, Lin ;

Zhang, Xin-Rong ;

Yamaguchi, Hiroshi ;

Liu, Zhong-Sheng .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2010, 53 (19-20) :4101-4111

[10] New prediction methods for CO2 evaporation inside tubes:: Part I -: A two-phase flow pattern map and a flow pattern based phenomenological model for two-phase flow frictional pressure drops [J].

Cheng, Lixin ;

Ribatski, Gherhardt ;

Quiben, Jesus Moreno ;

Thome, John R. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2008, 51 (1-2) :111-124

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