STEADY-STATE FLOW DISTRIBUTION ANALYSIS OF NATURAL CIRCULATION IN WATER TUBE BOILER

被引：3
|
作者：
Elgandelwar, Atul M. [1 ]
Jha, R. S. [2 ]
Lele, Mandar M. [3 ]
机构：
[1] SPPU, Mech Engn Dept, Maharashtra Inst Technol Kothrud, Pune, Maharashtra, India
[2] Thermax India Ltd, Sch Mech Engn, Innovat Heating SBU, MIT WPU, Pune, Maharashtra, India
[3] SPPU, Mech Engn Dept, MIT Coll Engn Kothrud, Pune, Maharashtra, India
来源：
COMPUTATIONAL THERMAL SCIENCES | 2020年 / 12卷 / 03期
关键词：
natural circulation; flow distribution; pressure drop; two-phase flow; void fraction; circulation ratio;
D O I：
10.1615/ComputThermalScien.2020033963
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The paper presents a generalized approach for the flow distribution analysis of a natural circulation boiler. The model uses the combination of node and loop equations and the Newton Raphson technique for the solution of the set of equations. Loop equations have been developed for each evaporator tube with the unique driving force and pressure drop of the concerned loop. Node equations are mainly developed for common risers and downcomers. A unique connectivity matrix has been used to correlate each branch flow with loop and node equations. The model is validated by a unique indirect method by comparing the actual water level and calculated water level. The model shows good agreement with experimental data with a maximum of 4% absolute error. The model can be used for the design, analysis, and optimisation of the natural circulation network.
引用
收藏
页码：275 / 288
页数：14
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