Numerical study of steam condensation inside a long inclined flattened channel

Abadi, S.M.A. Noori Rahim; Davies, William A.; Hrnjak, Pega; Meyer, Josua P.

doi:10.1016/j.ijheatmasstransfer.2019.01.063

Cited by 15 publications

(6 citation statements)

References 37 publications

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“…For appropriate examine, various kinds of relationship are required to be done for guess in dissimilar condensation flow regimes, and the shortage to determine the proper kind can result in intense errors. This leads to the deduction that determination of the flow regime is one of the most important(relevant) Dr. Louay Abd Alazez Mahdi 3 Dr. Muna Sabah Kassim 2 Mohammed Ghazi M. Kamil 1 Journal of Engineering and Sustainable Development (Vol. 24 No.…”

Section: Flow Regimesmentioning

confidence: 99%

“…(2), it is feasible to determine the flow pattern dominant by using quantities that given in table (1):…”

Section: Flow Regimesmentioning

confidence: 99%

“…Table (1). The ranges for the flow pattern dominant condensation parameters in air-cooled steam condenser.…”

Section: Flow Regimesmentioning

confidence: 99%

“…Industries applications include condensation phenomenon inside horizontal tubes such as air-cooled power generation plants, desalination, air-conditioning refrigerant and Concentrated Solar Power [1][2] [3]. Substantial importance to understand the flow patterns and heat transfer process that will lead to the development of the purpose of the systems precisely and in-deepness.…”

Section: Introduction Manymentioning

confidence: 99%

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Predicting of Steam Condensation Heat Transfer Coefficient in Horizontal Flattened Tube

Kamil

Kassim

Mahdi

2022

jeasd

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The heat transfer coefficient of steam condensation has a significant role in the performance of air-cooled heat exchangers. The purpose of this work is to predict the local/average local steam condensation heat transfer coefficient inside the horizontal flattened tube under vacuum conditions using numerous correlations that were developed by some researches which have been conducted under specified conditions. The results from these correlations have been compared with experimental data of Davies, therefore more investigate for the values are necessary to improve or/and validate the existing correlations. The effect of such parameters like the uniform heat flux and saturation temperature also have been studied on the local steam condensation heat transfer coefficient as the results show that the heat transfer coefficient decrease as the heat flux increase, while it increases as the steam saturated temperature increase.

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Section: Flow Regimesmentioning

confidence: 99%

“…(2), it is feasible to determine the flow pattern dominant by using quantities that given in table (1):…”

Section: Flow Regimesmentioning

confidence: 99%

“…Table (1). The ranges for the flow pattern dominant condensation parameters in air-cooled steam condenser.…”

Section: Flow Regimesmentioning

confidence: 99%

Section: Introduction Manymentioning

confidence: 99%

See 2 more Smart Citations

Predicting of Steam Condensation Heat Transfer Coefficient in Horizontal Flattened Tube

Kamil

Kassim

Mahdi

2022

jeasd

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“…Condensation phenomenon is deployed in many industrial applications of equipment such as air-cooled power generation plants, desalination, air-conditioning refrigerant, concentrated solar power, chemical processes and nuclear power plants [1][2][3][4]. Usually, the two-phase flow pattern describes the behaviour of the condensation and flow characteristic along the inner wall of the tube, so based on the two-phase flow pattern, the pressure drop and the heat transfer rate, whether in a horizontal or a vertical tube, can be estimated and predicted.…”

mentioning

confidence: 99%

Modeling of Heat Transfer and Steam Condensation Inside a Horizontal Flattened Tube

Kamil¹,

Kassim²,

Mahmood³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

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This work investigates the steam condensation phenomena in an air-cooled condenser. The considered horizontal flattened tube has a 30 mm hydraulic diameter, and its length is a function of the steam quality with a limit value between 0.95 and 0.05. The mass flow rate ranges from 4 to 40 kg/m 2 .s with a saturated temperature spanning an interval from 40°C to 80°C. A special approach has been implemented using the Engineering Equation Solver (EES) to solve a series of equations for the two-phase flow pattern and the related heat transfer coefficients. A wavy-stratified structure of the two-phase flow has been found when the mass rate was between 4 and 24 kg/m 2 .s. In contrast, an initially annular flow is gradually converted into a wavy stratified flow (due to the condensation process taking place inside the flattened tube) when the considered range ranges from 32 to 40 kg/m 2 .s. KEYWORDSCondensation; flow pattern structure; heat transfer rate; flow in horizontal pipe; flow behaviour; EES modelling Nomenclature A Tube cross-section area, [m 2 ] A l Liquid cross-section area, A l = A (1-ε), [m 2 ] A ld Dimensionless cross-sectional area occupied by liquid, A ld = A l /d 2 A V Vapor cross-sectional area, Av = A ε, [m 2 ] A vd Dimensionless cross-sectional area occupied by vapor, A vd = A v /d 2 c p Specific heat, [J/(kg.K)] D h Hydraulic diameter, [m] Fr l Liquid Froude number, G 2 /(q 2 l gD h ) g Acceleration of gravity, [m/s 2 ] G Total mass flow rate (mass velocity) of liquid and vapor [kg/(m 2 .s)] G strat Transition mass velocity of stratified flow [kg/(m 2 .s)] G wavy Transition mass velocity of wavy flow [kg/(m 2 .s)] h Heat transfer coefficient [W/(m 2 .K)]

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Numerical investigation of the heat and mass transfer performance of a two-phase closed thermosiphon based on a modified CFD model

Hu-qing

Yue

Wang

et al. 2021

Case Studies in Thermal Engineering

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Numerical study of steam condensation inside a long inclined flattened channel

Cited by 15 publications

References 37 publications

Predicting of Steam Condensation Heat Transfer Coefficient in Horizontal Flattened Tube

Predicting of Steam Condensation Heat Transfer Coefficient in Horizontal Flattened Tube

Modeling of Heat Transfer and Steam Condensation Inside a Horizontal Flattened Tube

Numerical investigation of the heat and mass transfer performance of a two-phase closed thermosiphon based on a modified CFD model

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