A validation of computational fluid dynamics temperature distribution prediction in a pulverized coal boiler with acoustic temperature measurement

Modliński, Norbert; Madejski, Paweł; Janda, Tomasz; Szczepanek, Krzysztof; Kordylewski, W.

doi:10.1016/j.energy.2015.05.124

Cited by 58 publications

(19 citation statements)

References 26 publications

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“…This technology (Acoustic gas temperature measurement system) became possible with the use of acoustic methods of temperature measurement. So in the papers [10,17,19] detailed application of acoustic temperature sensors in combustion chambers of real power plants was described. The operating principle of this system is based on the realization of the functional dependence of the speed of sound on the temperature of the medium through which it propagates.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of heat and mass transfer processes in the combustion chamber of industrial power plant boiler. Part 1. Flow field, temperature distribution, chemical energy distribution

Аскарова

Maximov

Bolegenova

et al. 2017

ACM

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In the present paper, the furnace chamber of the BKZ-160 boiler of Almaty TPP-3 (Kazakhstan) has been calculated. The thermal characteristics of the process were studied in the form of the distribution of temperature fields and chemical energy, and the aerodynamics of the combustion chamber was also calculated. The type of fuel, its elementary and fractional composition, exerts the greatest influence on the course of heat-mass exchange processes and aerodynamics. The computational experiment was carried out with two models of particle size distribution: a polydisperse fuel flame (the particle diameter varies from 10 to 120 μm) and monodisperse fuel flame (particle size identical and equal to d p = 60 μm). Based on the results of the computational experiments, the main regularities in the distribution of heat fluxes in the combustion chamber volume and flow aerodynamics were obtained. It is shown that the greatest thermal load falls on the central region of the walls of the combustion chamber and the location of the burner devices, which is typical for both mono-and polydisperse fuel flames. The temperature data obtained as a result of the computational experiment showed better convergence with the empirical data obtained directly at TPP-3. Aerodynamics of the flow for the two selected models of particle size distribution has insignificant differences, but how they affect other characteristics of the process is one of the following tasks in view of the authors. It should be noted that the calculation of the polydisperse fuel flame takes much more calculation time.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of heat and mass transfer processes in the combustion chamber of industrial power plant boiler. Part 1. Flow field, temperature distribution, chemical energy distribution

Аскарова

Maximov

Bolegenova

et al. 2017

ACM

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“…This technology can provide average value in the selected cross-section. A detail validation study of the CFD model by comparison of computations against Acoustic Pyrometry measurements was demonstrated in [19]. To show the temperature field variation over the surface, an area-based and mass-based uniformity indexes (UI area , UI mass ) of temperature distribution were used:…”

Section: Results Of Numerical Simulationmentioning

confidence: 99%

“…Acoustic gas temperature and mass flow rate of pulverized coal measurement systems allow for online monitoring of the most important combustion parameters. A temperature measurement can also be applied to verify the results of computational fluid dynamics (CFD) modeling [19].…”

Section: Introductionmentioning

confidence: 99%

A Combustion Process Optimization and Numerical Analysis for the Low Emission Operation of Pulverized Coal-Fired Boiler

Madejski¹,

Janda²,

Modliński³

et al. 2016

Developments in Combustion Technology

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The paper presents experimental and numerical investigation of pulverized coal combustion process analysis and optimization. The research was conducted on the frontfired pulverized coal boiler with dedicated low-NOx furnace installation. In order to find optimal boiler operating conditions the acoustic gas temperature measurement system and mass flow rate of pulverized coal measurement system was applied. The uniform temperature distribution as a result of uniform coal and air flow provides the optimal combustion process with low level of NOx emission and total organic carbon content in ash. Experimental results confirm that the monitoring and control of fuel and air flow distribution allows to optimize combustion process by increasing thermal efficiency of the boiler. In the numerical part of investigation, the complex CFD model of pulverized coal boiler was made. The calculations of turbulent, reactive, and thermal flow processes were performed at different boiler operating conditions retrieved from power plant online monitoring system. The results of numerical simulations enable to identify the optimal boiler operating conditions.

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“…Numerical simulations of pulverized coal combustion fields are useful to archive such understanding [e.g., . Recently, numerical simulations of actual large-scale boilers have been conducted by some researchers [e.g., [7][8][9][10]. Numerical simulations for predicting NOx formation characteristics in coal combustion fields have also been conducted [e.g., [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Effect of different fuel NO models on the prediction of NO formation/reduction characteristics in a pulverized coal combustion field

Hashimoto

Watanabe

Kurose

et al. 2017

Energy

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To investigate the effects of fuel NO formation models on the prediction of NO concentrations in a coal combustion field, numerical simulations for a coal combustion field in a 760 kW test furnace were performed. Three models, those proposed by De Soete, Chen et al. and Mitchell et al. were employed to calculate fuel NO formation originating from volatile matter. The results show that the model proposed by Mitchell et al. reproduces the tendency of the experimental data better than the other two models. In addition, the difference between the NO conversion ratios of bituminous coal and sub-bituminous coal that contains a high level of moisture was examined in detail using simulation results from the model of Mitchell et al. It was found that the formation of a region with a low oxygen mole fraction immediately downstream of a region with a high NO production rate is essential to realize a low NO conversion ratio.

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A validation of computational fluid dynamics temperature distribution prediction in a pulverized coal boiler with acoustic temperature measurement

Cited by 58 publications

References 26 publications

Numerical investigation of heat and mass transfer processes in the combustion chamber of industrial power plant boiler. Part 1. Flow field, temperature distribution, chemical energy distribution

Numerical investigation of heat and mass transfer processes in the combustion chamber of industrial power plant boiler. Part 1. Flow field, temperature distribution, chemical energy distribution

A Combustion Process Optimization and Numerical Analysis for the Low Emission Operation of Pulverized Coal-Fired Boiler

Effect of different fuel NO models on the prediction of NO formation/reduction characteristics in a pulverized coal combustion field

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