Prediction of falling film evaporation on the AP1000 passive containment cooling system using ANSYS FLUENT code

Wang, Xianmao; Chang, Ho; Corradini, Michael L.; Cong, Tenglong; Wang, Jun

doi:10.1016/j.anucene.2016.05.014

Cited by 27 publications

(14 citation statements)

References 6 publications

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“…Meanwhile, the 0-0 surface is the moist air surface closest to the phase interface, where the water vapor partial pressure is saturated. us, the water vapor mass fraction of the 0-0 surface is yi (T sat,i ), which can be obtained from (2). e water vapor mass flow of the 0-0 surface equals to the sum of the convective mass flow S c,i and the diffusion mass flow S d,i .…”

Section: E First Methods (Vof_udf)mentioning

confidence: 99%

“…In recent years, more and more passive safety facilities have been applied in the large advanced pressurized water reactor. For example, the passive containment cooling system (PCCS) is used in AP600 [1], AP1000 [2], and CAP1400 [3], mainly to remove the decay heat from the postulated accident scenario and prevent the release of the radioactive materials.…”

Section: Introductionmentioning

confidence: 99%

“…erefore, they set up a 2D CFD numerical model adding the equivalent mass and energy sources in the first cell layer close to the wall, but they did not model the water film. Wang et al [2] also used FLUENT code to analyze AP1000 PCCS outside cooling, utilizing the Eulerian wall film (EWF) model simultaneously coupled with the Eulerian multiphase flow model and species transport model. eir numerical results were validated by the experimental data from EFFE [22] and showed that the EWF model could well simulate the falling film evaporation behavior.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of Water Film Evaporation with the Countercurrent Air in the Asymmetric Heating Rectangular Channel for Passive Containment Cooling System

2020

Science and Technology of Nuclear Installations

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Passive containment cooling system (PCCS) is an important passive safety facility in the large advanced pressurized water reactor. Using the physical laws, such as gravity and buoyancy, the water film/air countercurrent flow is formed in the external annular channel to keep inside temperature and pressure below the maximum design values. Due to the large curvature radius of the annular channel, one of the short arc segments is taken out, as a rectangular channel, to analyze the main water film evaporation heat transfer characteristics. Two numerical methods are used to predict the water film evaporative mass flow rate during the heat transfer process in the large-scale rectangular channel with asymmetric heating when the water film temperature is not saturated. At the same time, these numerical simulation results are validated by the experiment which is set up to study water film/air countercurrent flow heat transfer on a vertical back heating plate with 5 m in length and 1.2 m in width. It is shown that the maximum deviation between numerical simulation and experiment is 30%. In addition, the influences on these parameters, such as heat flux, evaporative mass flow rate, and water film thickness, are evaluated under the different tilted angles of the rectangular channel and horizontal plane, water/air inlet flow rates, water/air inlet temperatures, heating surface temperatures, and air inlet relative humidities. All these results can provide a good guidance for the design of PCCS in the future.

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Section: E First Methods (Vof_udf)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of Water Film Evaporation with the Countercurrent Air in the Asymmetric Heating Rectangular Channel for Passive Containment Cooling System

2020

Science and Technology of Nuclear Installations

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“…The flow behavior of falling liquid film on the outer surface of the containment vessel has been closely studied: Ambrosini et al (2002), Wei et al (2012), and Guzanov et al (2018) studied the water film falling down a flat plate experimentally; Ye and Yan (2006) reviewed studies of the stability and breakdown of falling film; Wang et al (2016) studied evaporation of falling film; and Tian and Li (2006) and Yang (2018) studied falling film on a wall numerically.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Impingement of Water Film on a Small Attached Bulging Plate on a Vertical Plane

2021

Front. Energy Res.

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In the passive containment cooling system of AP1000, the condensed water is expected to flow down on the inner surface of the steel wall of the containment, and recover to the in-containment refueling water storage tank (IRWST), therefore, to maintain the long-term coolability of the passive residual heat removal system. However, there are attached bulging plates on the inner surface for various engineering needs, such as supporting, and the impingement of condensed water film on these bulging plates can reduce the amount of the recovered water. In this article, a 3-D Eulerian wall film model in FLUENT was used to study a series of flow behaviors when a water film impinged on the bulging plate on a plane surface. The loss ratio of falling film impinging on attached plates of different sizes under different flow rates were calculated and in good agreement with the experiment results. Four stages of the film behavior during the impingement were identified and analyzed; in addition, the influences of the bulging height of attached plate and flow rate were studied. And a correlation between the loss ratio of impinging water film, the bulging height of the attached plate, and the Weber number was obtained.

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“…Under these studies the RAFT tests were proven to be representative of the full-scaled flow path. Moreover, Wang X. et al [77] used the Eulerian Wall film model in ANSYS Fluent to study the falling film evaporation in the PCS. The film evaporation model was validated against the EFFE facility [78] results obtaining the simulation results agreed with the experimental data.…”

Section: 22passive Containment Safety System (Pcs)mentioning

confidence: 99%

Development of an AP1000 3D full containment model using an innovative approach

Estévez-Albuja¹

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Prediction of falling film evaporation on the AP1000 passive containment cooling system using ANSYS FLUENT code

Cited by 27 publications

References 6 publications

Numerical Investigation of Water Film Evaporation with the Countercurrent Air in the Asymmetric Heating Rectangular Channel for Passive Containment Cooling System

Numerical Investigation of Water Film Evaporation with the Countercurrent Air in the Asymmetric Heating Rectangular Channel for Passive Containment Cooling System

Numerical Study of the Impingement of Water Film on a Small Attached Bulging Plate on a Vertical Plane

Development of an AP1000 3D full containment model using an innovative approach

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