Pressure drop analysis of steam condensation in air-cooled circular tube bundles

O’Donovan, Alan; Grimes, Ronan

doi:10.1016/j.applthermaleng.2015.04.072

Cited by 18 publications

(6 citation statements)

References 21 publications

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“…The increased void fraction slowed down the vapor velocity, caused less shear between phases and finally lowered the frictional pressure losses and thus total pressure drop; lastly, the momentum pressure drop was found to be almost unaffected by inclination angles, and did not affect too much the trend of total pressure drop. Similar to the results reported by O'Donovan and Grimes [31], the total pressure drops were found to be quite small. However, their reported frictional pressure drop and momentum recovery were comparably larger than the ones in this study mainly because they had much higher vapor velocities under the vacuum operating condition.…”

Section: Pressure Drop Analysis In Test Tubesupporting

confidence: 80%

“…In reality, the ACC power plants are operating in vacuum condition, and thus the gravitational recovery becomes negligible as vapor density is very small. Also, the frictional loss and momentum recovery would increase dramatically due to the very high vapor velocity as have been discussed in [31].…”

Section: Pressure Drop Analysis In Test Tubementioning

confidence: 99%

“…Most recently, O'Donovan and Grimes [31] conducted an experimental study on steam-side pressure drop in a full-scale ACC circular tube bundle under vacuum conditions. Operating at the mass fluxes between 0.7 to 2 kg m -2 s -1 , the measured pressure drop between inlet and outlet header was relative small, in the range of 130 to 250 Pa.…”

Section: Pressure Drop In Air-cooled Condensermentioning

confidence: 99%

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Effect of inclination on pressure drop and flow regimes in large flattened-tube steam condensers

Kang

Davies

Hrnjak

et al. 2017

Applied Thermal Engineering

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This thesis presents an experimental study of the inclination effect on pressure drop and flow regime during condensation of steam in a large flattened tube used in air-cooled condensers (ACC) for power plants. Steam Because of the creation of the visualization window, the tube width was less than that used in industry, and thus a model that accounts for the differences in tube geometry between the full and test tube was developed and used to convert experimental pressure drop results to the full-sized tube under the same operating conditions. A prediction of pressure drop performance of the same steam condensing system under vacuum condition was also discussed. The negative dependence of pressure drop on inclination angle also prevailed in both converted results in atmospheric condition and the predicted ones in vacuum condition.iii Acknowledgement

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Section: Pressure Drop Analysis In Test Tubesupporting

confidence: 80%

Section: Pressure Drop Analysis In Test Tubementioning

confidence: 99%

Section: Pressure Drop In Air-cooled Condensermentioning

confidence: 99%

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Effect of inclination on pressure drop and flow regimes in large flattened-tube steam condensers

Kang

Davies

Hrnjak

et al. 2017

Applied Thermal Engineering

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“…A 25 mm internal diameter aluminium tube, with annular fins on the exterior, formed the basis of this investigation. The tube was finned due to the fact that it was air-cooled, and formed part of a larger investigation into condensation in air-cooled condensers (ACCs) by O'Donovan and Grimes [25]. However, as shown in Figure 1, prior to the extended finned surface being applied, five collinear and equidistant measurement sites were machined along the length of the outer tube wall.…”

Section: Measurement Architecturementioning

confidence: 99%

Two-phase flow regime identification through local temperature mapping

O’Donovan

Grimes

2020

Experimental Thermal and Fluid Science

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“…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%

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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Pressure drop analysis of steam condensation in air-cooled circular tube bundles

Cited by 18 publications

References 21 publications

Effect of inclination on pressure drop and flow regimes in large flattened-tube steam condensers

Effect of inclination on pressure drop and flow regimes in large flattened-tube steam condensers

Two-phase flow regime identification through local temperature mapping

Predicting of Steam Condensation Heat Transfer Coefficient in Horizontal Flattened Tube

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