Modelling of pulverized coal boilers: review and validation of on-line simulation techniques

Díez, Luis I.; Cortés, Cristóbal; Campo, Antônio

doi:10.1016/j.applthermaleng.2004.10.003

Cited by 59 publications

(21 citation statements)

References 8 publications

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“…In fact, the thermal resistance of ash fouling and emissivity of water wall, effecting the thermodynamic parameter distributions, will change with the operation condition especially for blowing activation [20]. But in this paper, the two parameters were dealt as constants and their distributed characteristics were neglected.…”

Section: Discussionmentioning

confidence: 97%

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Distributed parameter modeling and simulation for the evaporation system of a controlled circulation boiler based on 3-D combustion monitoring

Chu

Lou

Cheng

et al. 2008

Applied Thermal Engineering

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Section: Discussionmentioning

confidence: 97%

“…Using Eqs. (19) and (20), and noticing that V is constant and specific internal energy is u = h À p/q, V 00 can then be eliminated from Eqs. (21) and (22) to give the following state equations:…”

Section: Drum Dynamicsmentioning

confidence: 99%

Distributed parameter modeling and simulation for the evaporation system of a controlled circulation boiler based on 3-D combustion monitoring

Chu

Lou

Cheng

et al. 2008

Applied Thermal Engineering

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“…As regards the simulation, the equations used for the calculation of the exergy flows of radiation are discussed in the following section. Modeling of thermal radiation in large industrial boilers can be consulted in [23][24][25].…”

Section: Radiative Heat Exchangersmentioning

confidence: 99%

Assessing the Exergy Costs of a 332-MW Pulverized Coal-Fired Boiler

Rangel-Hernández

Damián

Belman-Flores

et al. 2016

Entropy

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Abstract:In this paper, we analyze the exergy costs of a real large industrial boiler with the aim of improving efficiency. Specifically, the 350-MW front-fired, natural circulation, single reheat and balanced draft coal-fired boiler forms part of a 1050-MW conventional power plant located in Spain. We start with a diagram of the power plant, followed by a formulation of the exergy cost allocation problem to determine the exergy cost of the product of the boiler as a whole and the expenses of the individual components and energy streams. We also define a productive structure of the system. Furthermore, a proposal for including the exergy of radiation is provided in this study. Our results show that the unit exergy cost of the product of the boiler goes from 2.352 to 2.5, and that the maximum values are located in the ancillary electrical devices, such as induced-draft fans and coil heaters. Finally, radiation does not have an effect on the electricity cost, but affects at least 30% of the unit exergy cost of the boiler's product.

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“…However, CFD is incapable of modelling all components of a complex power plant efficiently and economically, in particular in an integrated manner. In order to take advantages of the efficiency of process modelling and accuracy of the CFD modelling techniques, we have linked the CFD simulations to a power plant model of a 500MW e pulverised coal combustion boiler in one of our previous papers [18], in addition to the attempts made by [15][16][17] for air-firing systems. In this paper, in order to investigate the potential of retrofitting an existing power plant to oxy-firing and to predict the safe operational regime that matches the designed air-firing conditions, an efficient reduced order model (ROM) has been developed to combine the CFD simulations with the whole plant process simulations.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the potential of retrofitting a coal power plant to oxy-firing using CFD and process co-simulation

Fei

Black

Szuhánszki

et al. 2015

Fuel Processing Technology

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Abstract:In this paper, a new approach has been developed for estimating the potential of retrofitting an existing power plant to oxy-firing and determining the safe operation regime of the boiler under enriched oxy-combustion. A Computational Fluid Dynamics (CFD) technique has been employed to simulate the complex coal combustion and heat transfer to the furnace water walls and heat exchangers under air-firing and oxy-firing conditions. A set of reduced order models (ROMs) have been developed to link the CFD predictions to the efficient whole plant process models in order to simulate the performance of the power plant under different load and oxygen enrichment conditions if retrofitted to oxy-firing. The simulations of a 500MW e power plant unit indicate that it is possible to retrofit it to oxy-firing without affecting the overall performance of the unit. Similar heat transfer characteristics and steam generation can be achieved to those under air-firing, although the temperature of the boiler wall may increase after retrofitting. The upper limits for the oxygen enrichment at different power loads are identified and the feasible oxygen concentration range within 25%-27% is suggested for the oxy-coal operation of this retrofitted power plant investigated.However, the peak temperature on the superheater platen 2 may increase in the oxy-coal mode at high power load beyond 450MW e . If the tube material cannot endure the temperature increase, then an upgrade on the material is required.

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Modelling of pulverized coal boilers: review and validation of on-line simulation techniques

Cited by 59 publications

References 8 publications

Distributed parameter modeling and simulation for the evaporation system of a controlled circulation boiler based on 3-D combustion monitoring

Distributed parameter modeling and simulation for the evaporation system of a controlled circulation boiler based on 3-D combustion monitoring

Assessing the Exergy Costs of a 332-MW Pulverized Coal-Fired Boiler

Evaluation of the potential of retrofitting a coal power plant to oxy-firing using CFD and process co-simulation

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