Numerical Investigation of Startup Instabilities in Parallel-Channel Natural Circulation Boiling Systems

Lakshmanan, Sriram; Pandey, Manmohan

doi:10.1155/2010/574195

Cited by 6 publications

(1 citation statement)

References 15 publications

(22 reference statements)

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“…This figure captures the variation in dryness fraction among the tubes due to poor flow distribution. It is difficult to measure the flow and dryness fraction of these tubes to validate the model [16,17]. A novel method of validation strategy is used.…”

Section: Model Validationmentioning

confidence: 99%

Steady State Two-Phase Flow Analysis of Natural Circulation in Hybrid Boiler

Elgandelwar¹,

Jha²,

Lele³

2020

IJHT

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In this present works, a generalized approach for the two-phase flow analysis of a natural circulation in hybrid 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. Experiments have been performed with uniform diameter of tubes in 53 channels circulating loop to find the volume of steam. The model shows good agreement with experimental investigations with a maximum of 3.57% absolute error. The model can be used for the design, analysis, and optimization of the natural circulation network.

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Section: Model Validationmentioning

confidence: 99%