Novel method for validation of experimental data for direct contact condensers with zero vapor outflow

Jaćimović, Nikola; Genić, Srbislav; Jačimović, Branislav

doi:10.1016/j.applthermaleng.2015.08.052

Cited by 5 publications

(6 citation statements)

References 6 publications

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“…(10)) for all measured data points. As it can be concluded from these figures, there is an unequivocal relationship between these two parameters, which has been used as another validation of the measured results, as mentioned in [7].…”

Section: Appendix a -Experimental Data Pointsmentioning

confidence: 70%

“…Mean mass flow rate of gas was defined as the mean value along the column which is described in detail in [7] and is defined as:…”

Section: Resultsmentioning

confidence: 99%

“…The water temperature was monitored using a PT-100 thermometer (12) with the accuracy of 0.1°C. Saturated steam was introduced into the bottom part of the column from the main distribution line (7) by using a dedicated line (6). The flow was regulated using a globe valve (13) and measured by means of a calibrated orifice (14) connected to a U-tube (15).…”

Section: Methodsmentioning

confidence: 99%

“…Verification of the measured experimental values was performed using two different approaches: (i) the one based on balance equations, (ii) the one described in [7] based on analytical method. Both of the above-mentioned verification approaches are explained in depth by the authors in [7]. Here, only a brief general description of the two methods is provided.…”

Section: Verification Of Measured Valuesmentioning

confidence: 99%

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Sizing of Packed Deaeration Columns

2019

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Removal of oxygen from feedwater is of paramount importance for safe boiler operation. Insufficient extraction of oxygen in deaeration vessels will lead to limited efficiency of oxygen scavengers and unsafe plant operation. The presented sizing procedure for packed deaeration columns is based on the similarity theory between heat and mass transfer and existing procedures. The goal of the proposed technique is not to achieve optimization of column dimensions, but to ensure that there is no undersizing of the packing height. This approach is justified considering the relatively low capital costs of deaeration columns in boiler plants. The proposed equations are based on an experimental setup involving several hundred operating regimes which have been verified and confirmed to have a high degree of accuracy.

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Section: Appendix a -Experimental Data Pointsmentioning

confidence: 70%

“…Mean mass flow rate of gas was defined as the mean value along the column which is described in detail in [7] and is defined as:…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Verification Of Measured Valuesmentioning

confidence: 99%

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Sizing of Packed Deaeration Columns

2019

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“…As shown in Equations () and (), based on a certain direct‐contact condensate system, NTU L is affected by the two‐phase inlet temperature, liquid‐phase flow, liquid‐phase heat transfer coefficient, and heat transfer area, that is, the operating and equipment conditions of the tower equipment. NTU L can be regarded as the ratio of the total thermal conductivity of the cooling water to the heat capacity of the cooling water; it can be used to quantify the condensation intensity of the direct‐contact condensation process, as well as to establish a correlation with equipment conditions 14,15 . This indicates that further investigations into the NTU L will enable the development of an effective size design method for direct‐contact condensers.…”

Section: Methodsmentioning

confidence: 99%

Experimental investigation on direct‐contact condensation of subatmospheric pressure steam in cocurrent flow packed tower

Chen

Tian

Guo³

et al. 2022

Energy Science & Engineering

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Exhaust steam condensation equipment is an important component in thermal power generation systems. Direct-contact condensation offers high heat transfer efficiency, small flow resistance, simple structure, and less scaling; therefore, its application to exhaust steam condensation equipment is conducive to reducing equipment investment and operation costs. In this study, the direct-contact condensation of subatmospheric pressure steam (exhaust steam) is investigated in a cocurrent flow packed tower. The effects of steam temperature, steam flow, cooling water temperature, and cooling water flow on the condensation rate, subcooling, number of liquid-phase heat transfer units (NTU L ), and total volume heat transfer coefficient (K V ) are investigated. The results show that the direct-contact condensation of exhaust steam can yield a high condensation rate, low subcooling, and good stability in the cocurrent flow packed tower. Lower steam temperature, higher steam flow, higher inlet-water temperature, and lower water flow are conducive to the increase in NTU L . It is discovered that NTU L and K V can be expressed by dimensionless parameters of flow and temperature, and that the empirical correlations of NTU L and K V agree well with experimental data. K E Y W O R D Scocurrent flow packed tower, direct-contact condensation, exhaust steam condensation, number of liquid-phase heat transfer units, subcooling, total volume heat transfer coefficient

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Heat transfer coefficient for condensation of steam on freely formed falling liquid jets

Radanov¹,

Genić

Jačimović

2016

AIChE Journal

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This article presents the research results of direct contact condensation of steam on freely formed falling liquid jets. After the comparison of experimental data and open literature correlations it was concluded that published correlations does not provide accurate coverage of experimental data. A new correlation was established in the following form urn:x-wiley:00011541:media:aic15233:aic15233-math-0001 © 2016 American Institute of Chemical Engineers AIChE J, 62: 2579–2584, 2016

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Novel method for validation of experimental data for direct contact condensers with zero vapor outflow

Cited by 5 publications

References 6 publications

Sizing of Packed Deaeration Columns

Sizing of Packed Deaeration Columns

Experimental investigation on direct‐contact condensation of subatmospheric pressure steam in cocurrent flow packed tower

Heat transfer coefficient for condensation of steam on freely formed falling liquid jets

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