Analysis of water droplet evaporation in a gas turbine inlet fogging process

Kim, Kyoung Hoon; Ko, Hyung–Jong; Kim, Kyoung-Jin; Perez-Blanco, Horacio

doi:10.1016/j.applthermaleng.2011.09.012

Cited by 46 publications

(31 citation statements)

References 12 publications

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“…(5) and (15). There remains no liquid droplet after completion evaporation of the liquid water droplets and, then, dry compression begins at state 2.…”

Section: System Analysismentioning

confidence: 99%

“…Performance specifications of gas turbines show that the reduced inlet temperature increases the capacity and reduces the heat transfer rate. Many researchers [6][7][8][9][10][11][12][13][14][15] have conducted experimental or analytical studies on the inlet fogging in gas turbine engines, and achieved significant improvement at various aspects of the technology including the methods of generating, controlling, and measuring water sprays as well as the non-equilibrium modeling of the transient fogging process.…”

Section: Introductionmentioning

confidence: 99%

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Analytical modeling and assessment of overspray fogging process in gas turbine systems

Kim

2015

J. Engin. Thermophys.

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In this study, analysis of the overspray fogging process, which consists of inlet fogging and wet compression processes in gas turbine cycle, is carried out with a non-equilibrium analytical modeling based on liquid droplet evaporation. The transient behaviors of droplet diameter and air temperature are examined. Special attention is paid to the effects of system parameters such as pressure ratio, water injection ratio, and initial droplet diameter on the process performances, including evaporation time of droplets, compressor outlet temperature, and compression work. Process performances are also estimated under the condition of critical water injection ratio above which complete evaporation of injected water droplets within a compressor is not possible. The analytical results indicate that the overspray fogging process has a potential of lowering compressor outlet temperature and saving significant compression work when compared to dry compression, and this technique is more effective for a higher pressure ratio and smaller size of injected water droplet.

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“…(5) and (15). There remains no liquid droplet after completion evaporation of the liquid water droplets and, then, dry compression begins at state 2.…”

Section: System Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical modeling and assessment of overspray fogging process in gas turbine systems

Kim

2015

J. Engin. Thermophys.

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“…In this study, a water droplet cooling technique or (water mist cooling technique) were developed by suspending fine water droplets into the working fluid. The water mist techniques, not a new cooling concept and has been successfully applied in many industrial applications [13][14][15][16][17][18]. Utilizing water mist as a cooling medium provides excellent cooling approaches to dissipate heat even larger than the single-phase air cooling approaches.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation in Improving Thermal Performance of Passive Heat Removal System using Mist Assisted Evaporative Cooling

Abed¹,

Щеклеин²,

Pakhaluev³

2020

ARFMTS

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Demands to increase the safety and reliability of the modern nuclear reactors are constantly being made. Typical demands include the increases the thermal performance of the passive heat removal system PHRS by removing larger amounts of energy and applied a technique that leads to reduce size and weight of the PHRS unit. This article presents an experimental investigation on the natural convection based on alternative cooling approach using water mist. The results obtained from the related experimental work indicated that the heat transfer rate was enhanced over that for the airflow as a result of water mist evaporation on the surface of the tubes. The Nu number increases by about 148%, 144%, and 128% respectively for all tube rows compared with airflow. The experimental results of the thermal performance factor values obtained by suspended water mist were correlated as functions of Rayleigh number (Ra) and Weber number (We). Subsequently, the predicted thermal performance factor from the correlation was plotted to compare with the experimental data. It was found that the thermal performance factor was within ±11%.

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“…Then we expect f 3 = D 3 = 0. On the contrary, when water injection ratio f 0 is higher than f 0c , the air becomes saturated and remained liquid water droplets leave the compressor along with air [14]. In this work the analysis is restricted to the cases of complete evaporation of injected droplets inside a compressor.…”

Section: System Analysismentioning

confidence: 99%

“…Performance specifications of gas turbines show that the reduced inlet temperature increases the capacity and reduce the heat transfer rate. Many researchers as Chaker et al [6][7][8], Utamura [9], Bhargava and Mehr-Homji [10], Belarbi et al [11], Yang et al [12], Farzaneh-Gord and Deymi-Dashtebayaz [13], and Kim et al [14] have conducted experimental or analytical studies on the inlet fogging in gas turbine engines, and achieved significant improvement at various aspects of the technology including methods of generating, controlling, and measuring sprays as well as the non-equilibrium modeling of the transient fogging process.…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of Overspray Process in Gas Turbine Systems

Kim

2012

Energies

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Gas turbine power can be augmented by overspray process which consists of inlet fogging and wet compression. In this study exergy analysis of the overspray process in gas turbine system is carried out with a non-equilibrium analytical modeling based on droplet evaporation and the second law of thermodynamics. This work focuses on the effects of system parameters such as pressure ratio, water injection ratio, and initial droplet diameter on exergetical performances including irreversibility and exergy efficiency of the process. The process performances are also estimated under the condition of saturated water injection ratio above which complete evaporation of injected water droplets within a compressor is not possible. The results show that the irreversibility increases but the saturated irreversibility decreases with increasing initial droplet diameter for a specified pressure ratio.

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Analysis of water droplet evaporation in a gas turbine inlet fogging process

Cited by 46 publications

References 12 publications

Analytical modeling and assessment of overspray fogging process in gas turbine systems

Analytical modeling and assessment of overspray fogging process in gas turbine systems

Experimental Investigation in Improving Thermal Performance of Passive Heat Removal System using Mist Assisted Evaporative Cooling

Exergy Analysis of Overspray Process in Gas Turbine Systems

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