Online application oriented calculation of the exhaust steam wetness fraction of the low pressure cylinder in thermal power plant

Xu, Liang; Yuan, Jingqi

doi:10.1016/j.applthermaleng.2014.11.020

Cited by 23 publications

(9 citation statements)

References 28 publications

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“…In this case, the gas mixture theory is no longer directly utilizable to calculate the thermodynamic properties of the gas-liquid two-phase flue gas. In this study, we use the IAPWS-IF97 to deal with the thermodynamic properties of H 2 O [6,7], and put our concentrations on the thermodynamic properties calculation of N 2 , O 2 , CO 2 and the flue gas covering the whole range.…”

Section: Calculation Of Thermodynamic Properties Of the Flue Gasmentioning

confidence: 99%

“…In other words, r is generally online measurable with redundant zirconium oxide probes (ZOPs) in parallel, which is usually mounted at the entrance of the air preheater (APH). A minimum-maximum exclusive mean (MMEM) filter [7] is used for preprocessing the measured values of ZOPs considering their inherent uncertainty. On the other hand, the right-hand side of Eq.…”

Section: A N U S C R I P Tmentioning

confidence: 99%

“…Water and steam is generally used as the working fluid in the heat cycle of power plants. In 1997, a new formulation IAPWS-IF97 for calculating the thermodynamic properties of water and steam was published by IAPWS (International Association for the Properties of Water and Steam) [6,7]. Nowadays, it has been widely applied to calculate the thermodynamic properties of the working fluid in energy engineering.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermodynamic properties calculation of the flue gas based on its composition estimation for coal-fired power plants

Yuan

2015

Applied Thermal Engineering

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Section: Calculation Of Thermodynamic Properties Of the Flue Gasmentioning

confidence: 99%

Section: A N U S C R I P Tmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamic properties calculation of the flue gas based on its composition estimation for coal-fired power plants

Yuan

2015

Applied Thermal Engineering

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“…, meaning the pressure of the working fluid in the evaporation system is always less than the critical pressure (22.064 MPa), the two-phase segment exists definitely and the evaporation system works under the subcritical working condition. The objective function is formulated as: (30) and the feasible region Γ is:…”

Section: Solution Algorithmmentioning

confidence: 99%

“…(3) When 30 22.064 pp  , whether the two-phase segment exists need to be automatically discriminated by the solution algorithm. L c is defined as the critical length of the subcooled water segment and satisfies:…”

Section: Solution Algorithmmentioning

confidence: 99%

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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Identification of optimal operating strategy of direct air-cooling condenser for Rankine cycle based power plants

Wang

et al. 2018

Applied Energy

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Online application oriented calculation of the exhaust steam wetness fraction of the low pressure cylinder in thermal power plant

Cited by 23 publications

References 28 publications

Thermodynamic properties calculation of the flue gas based on its composition estimation for coal-fired power plants

Thermodynamic properties calculation of the flue gas based on its composition estimation for coal-fired power plants

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

Identification of optimal operating strategy of direct air-cooling condenser for Rankine cycle based power plants

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