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

Rangel-Hernández, V.H.; Damián, César; Belman-Flores, J.M.; Zaleta-Aguilar, Alejandro

doi:10.3390/e18080300

Cited by 6 publications

(4 citation statements)

References 25 publications

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“…Using the method, the work potential and energy efficiency of the system can be calculated [18][19][20][21][22]. Therefore, it is widely used in power system design and boiler improvement [23][24][25][26][27]. Shi [28] determined the boiler efficiency from soot blowing and proposed a superior model to improve the boiler performance.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Impact of Exergy Analysis and Structural Improvement in Power Plant Boiler through Co-Simulation

Yin

Jin

et al. 2022

Energies

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In current power station boilers, fuel burns at a low temperature, which results in low exergy efficiency. This research combined the second law of t with the boiler structure to maximize the efficiency of a 350 MW power plant boiler. A three-dimensional simulation of the combustion process at the power plant boiler is performed. A one-dimensional simulation model of the boiler is then constructed to calculate the combustion exergy loss, heat transfer exergy loss, and boiler exergy efficiency. Under the principle of high-temperature air combustion technologies, this paper also proposes a new structure and improved operating parameters to improve the exergy efficiency of boilers by reducing the heat exchange area of the economizer and increasing the heat exchange area of the air preheater. Simulation results show that the exergy efficiency of the boiler increased from 47.29% to 48.35% through the modified model. The simulation outcomes can instruct future optimal boiler design and controls.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Impact of Exergy Analysis and Structural Improvement in Power Plant Boiler through Co-Simulation

Yin

Jin

et al. 2022

Energies

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“…Abdelmotalib et al remarked that due to very complicated processes, which occur in the fluidized bed combustors, it is difficult to cover all aspects of heat transfer [ 9 ]. Therefore some additional, auxiliary data, e.g., to adjust parameters or to solve complex differential equations are necessary, and even other assumptions should be made to get a trackable solution [ 33 , 34 , 35 , 36 , 37 , 38 ]. As an example, Zhou et al pointed out that simulations conducted on the platform of FLUENT 12 software with three processors parallel for 70 s with the number of meshes nearly 8500 costs nearly 60 days [ 15 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Performance in a Superheater of an Industrial CFBC Using Fuzzy Logic-Based Methods

Krzywański

2019

Entropy

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The heat transfer coefficient in the combustion chamber of industrial circulating flidized bed (CFB) boilers depends on many parameters as it is a result of multifactorial mechanisms proceeding in the furnace. Therefore, the development of an effective modeling tool, which allows for predicting the heat transfer coefficient is interesting as well as a timely subject, of high practical significance. The present paper deals with an innovative application of fuzzy logic-based (FL) method for the prediction of a heat transfer coefficient for superheaters of fluidized-bed boilers, especially circulating fluidized-bed combustors (CFBC). The approach deals with the modeling of heat transfer for the Omega Superheater, incorporated into the reaction chamber of an industrial 670 t/h CFBC. The height above the grid, bed temperature and voidage and temperature, gas velocity, and the boiler’s load constitute inputs. The developed Fuzzy Logic Heat (FLHeat) model predicts the local overall heat transfer coefficient of the Omega Superheater. The model is in good agreement with the measured data. The highest overall heat transfer coefficient is equal 220 W/(m2K) and can be achieved by the SH I superheater for the following inputs l = 20 m, tb = 900 °C, v = 0.95, u = 7 m/s, M-C-R = 100%. The proposed technique is an effective strategy and an option for other procedures of heat transfer coefficient evaluation.

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“…There are some studies about coal-fired boilers [7][8][9][10]. Figure 1 shows a schematic of a coal-fired oxy-fuel boiler [11], in which oxygen is first separated from the air and then mixed with a stream of recycled flue gases from the boiler.…”

Section: Oxygen Combustion In the Coal-fired Boilermentioning

confidence: 99%

The Efficiency Improvement by Combining HHO Gas, Coal and Oil in Boiler for Electricity Generation

et al. 2017

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Abstract:Electricity is an essential energy that can benefit our daily lives. There are many sources available for electricity generation, such as coal, natural gas and nuclear. Among these sources, coal has been widely used in thermal power plants that account for about 41% of the worldwide electricity supply. However, these thermal power plants are also found to be a big pollution source to our environment. There is a need to explore alternative electricity sources and improve the efficiency of electricity generation. This research focuses on improving the efficiency of electricity generation through the use of hydrogen and oxygen mixture (HHO) gas. In this research, experiments have been conducted to investigate the combined effects of HHO gas with other fuels, including coal and oil. The results show that the combinations of HHO with coal and oil can improve the efficiency of electricity generation while reducing the pollution to our environment.

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

Cited by 6 publications

References 25 publications

Numerical Investigation on the Impact of Exergy Analysis and Structural Improvement in Power Plant Boiler through Co-Simulation

Numerical Investigation on the Impact of Exergy Analysis and Structural Improvement in Power Plant Boiler through Co-Simulation

Heat Transfer Performance in a Superheater of an Industrial CFBC Using Fuzzy Logic-Based Methods

The Efficiency Improvement by Combining HHO Gas, Coal and Oil in Boiler for Electricity Generation

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