Numerical study on annular tube once-through steam generator using compressible flow model

Wang, Z.L.; Tian, Wenxi; Wu, Yingwei; Qiu, Suizheng; Su, G.H.

doi:10.1016/j.anucene.2011.07.009

Cited by 35 publications

(2 citation statements)

References 21 publications

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“…Once the lengths L W , L E , and L S of the three moving segments are determined, the other output variables shown in Fig. 3 (18) and (19), while in the supercritical case, L W and L S are determined by Eqs. (7) and (24).…”

Section: Solution Algorithmmentioning

confidence: 99%

“…In light of the extreme complexity of distributed parameter model of the evaporation system, lumped parameter models are investigated in literature, which have two elementary forms: the total and the local lumped models. The total lumped models treat the entire evaporation system as a two-phase mixture with an assumed load-associated vapor-liquid fraction [17][18][19][20][21]. The local lumped models divide the flow channel of the once-through evaporation system into two (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic modeling and solution algorithm of the evaporation system for the ultra-supercritical power plant

Yuan

Wang

2017

International Journal of Heat and Mass Transfer

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The evaporation system of the ultra-supercritical power plant is characterized with a once-through steam generator. Modeling of such evaporation system is of extreme importance for the purpose of efficiency assessment and operation optimization. There still exist some major problems in the modeling because of the complexity of the phase transitions in the evaporation system at different loads. This paper establishes a moving segment model (including subcooled water, saturated two-phase and superheated steam segments) based on the mass and energy conservation principles under the subcritical and supercritical working conditions, and proposes a solution algorithm to deal with working condition switching in an automatic mode. Pseudo-online simulations are performed to test the model and the algorithm by using the geometric parameters and the history operation data of a real ultra-supercritical unit in China. The calculated heat absorption rate of the working fluid from the entire evaporation system agrees well with the reference value. The maximum absolute relative error is found as small as 0.54% in the time resolution of 30 min, which indirectly demonstrates the feasibility and accuracy of the presented model and the solution algorithm.

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Section: Solution Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%