Heat transfer measurement in a three-phase direct-contact condenser under flooding conditions

Mahood, Hameed B.; Campbell, Alasdair N.; Sharif, Adel O.; Thorpe, Rex B.

doi:10.1016/j.applthermaleng.2015.11.054

Cited by 23 publications

(5 citation statements)

References 36 publications

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“…Kawasaki and Hayakawa [11] carried out the experimental study on direct-contact mass and heat transfer between vapor and liquid with change of phase, volumetric coefficients of vapor phase mass transfer were measured and the effects of some specified operating conditions on condensation and evaporation rates were made clear. Mahood et al [12] experimentally measured the transient temperature distribution and volumetric heat transfer coefficient during the inception of flooding in a three-phase bubble type direct contact condenser. The transient temperature distribution, phase maps identifying flooding conditions and the volumetric heat transfer coefficient associated with flooding were estimated.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies of shell-side fluid flow and heat transfer characteristics in a submerged combustion vaporizer

Han

Ren

Wang

et al. 2016

International Journal of Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 99%

Experimental studies of shell-side fluid flow and heat transfer characteristics in a submerged combustion vaporizer

Han

Ren

Wang

et al. 2016

International Journal of Heat and Mass Transfer

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“…The hybrid condenser has many advantages over the surface condenser. For example, its volume is only 1/3 that of the surface condenser and its subcooling degree ranges from 0.2°C to 0.5°C, which is much smaller than that of the surface condenser 3,4 . The mixing of condensate and cooling water in hybrid condensers increases the cost of condensate treatment, so hybrid condensers are less commonly used.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of direct contact condensation of spent vapor in a cocurrent flow packed tower under negative pressure

Guo²,

Peng

et al. 2023

Energy Science & Engineering

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Condensers are often required in power generation systems to condense the exhaust steam generated at the end of the turbine. This paper will investigate the enhanced condensation process of spent steam in a parallel flow type. The operating parameters of steam temperature (Tcond), steam flow rate (Gin), cooling water temperature (Tin), and cooling water flow rate (Lw) will affect the condensation effect by changing the gas–liquid arrangement in the tower. In this experiment, an orthogonal test was designed in the Raschig ring to investigate the significance of these four operating parameters on the experimental results. Different types of packings have different condensation effects due to different accumulation methods. The same type of packing has a different surface area, resulting in different contact areas between the gas and liquid phases during condensation. In this experiment, four different packings will be investigated to find their condensation performance. This paper uses the size of subcooling (ΔT) as an indicator to evaluate the effectiveness of condensation, and the values of condensation rate (R), number of liquid phase heat transfer units (NTUL), and total volume heat transfer coefficient (Kv) are used as a reference for the effectiveness of condensation. The results show that the overall condensation effect of regular packing is better than that of random packing, The average condensation rate of regular packing is 95%, the average condensation rate of random packing is 90%, the subcooling of regular packing is about three to five smaller than that of random packing, the heat transfer coefficient of regular packing is about 1.5 times of that of random packing. And by fitting the Kv data for different packings, an empirical formula was obtained that can be used to predict the Kv size of other packings.

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“…The deficiency of the condenser affects the heat transfer between the mass flow and the initial dispersed phase. [9][10][11][12] Beside the condenser, a warm temperature of cooling water sent to the cooling tower can also decrease the vacuum system performance. The cooling tower performance is governed by the outlet water, air temperature, and the absorbed heat.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy expert system for troubleshooting of the deodorizer unit in a palm oil refining plant

et al. 2022

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In this paper, a troubleshooting technique is developed to provide a sequence of necessary actions during deodorizer unit failure in a palm oil refinery. This paper introduces a fuzzy expert system that incorporates the knowledge of experienced plant workers in dealing with the complex problems of the palm oil deodorizer. The presented methodology uses both qualitative and quantitative data. Qualitative data are collected from several interview sessions with the technical staff in a palm oil refinery. Quantitative data are gathered from various sources, such as control and monitoring systems. The qualitative data are analyzed to discover the possible pattern of faults in the deodorizer failure. This tool can diagnose possible faults and provide a sequence of necessary actions when deodorizer failure occurs. The obtained results show the developed deodorizer troubleshooting tool is useful to guide plant workers/ operators in diagnosing the possible faults and abnormalities during the troubleshooting process, as well as to provide field training for inexperienced staff.

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Heat transfer measurement in a three-phase direct-contact condenser under flooding conditions

Cited by 23 publications

References 36 publications

Experimental studies of shell-side fluid flow and heat transfer characteristics in a submerged combustion vaporizer

Experimental studies of shell-side fluid flow and heat transfer characteristics in a submerged combustion vaporizer

Experimental study of direct contact condensation of spent vapor in a cocurrent flow packed tower under negative pressure

Fuzzy expert system for troubleshooting of the deodorizer unit in a palm oil refining plant

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