Improving the energy efficiency of a 110 MW thermal power plant by low-cost modification of the cooling system

Jović, Milica; Laković, Mirjana; Banjac, Miloš

doi:10.1177/0958305x17747428

Cited by 13 publications

(11 citation statements)

References 9 publications

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“…Under clean conditions the pumps will only be exposed to water, with the sludge settling at the bottom of the pond the pumps will be exposed to water and sludge. This will lead to erosion, fouling and/or under deposit corrosion [39].…”

Section: A Clarification Through Coagulation and Flocculationmentioning

confidence: 99%

Management of Cooling Water Chemistry of Wet Cooled Power Plants in South Africa

2019

SETWM-19, ACBES-19, EEHSS-19 Nov. 18-19, 2019 Johannesburg (South Africa)

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Scaling, fouling and corrosion are known to have a substantial effect on the performance of coal fired power plant condensers. There are different treatment processes employed in combination with the in-service mechanical cleaning, however, the treatment processes have some limitations when looking at the cooling water chemistry control and condenser efficiency.The main purpose and focus of the study will be to understand the different treatment process limitations, constrains and optimization parameters. Conditions under which scaling, fouling and corrosion occur will be predicted using the Calcium Carbonate Precipitation Potential (CCPP) index to effectively treat, mitigate and minimise the challenges. CCPP is the calculated mass of calcium carbonate expected to precipitate or be dissolved by water.Coal fired power plants with the desalination process implemented will have better cooling water chemistry control compared to those using a cooling water treatment approach based on neutralisation, clarification through flocculation and coagulation, cold lime softening, ion exchange and blowdown method. With the exception of the cold lime soda treatment, some of the treatment processes are costly and generate concentrated effluents that must be disposed.It is predicted that, cold lime treatment when operated optimally may yield positive results and can therefore be considered as treatment of choice for the control of the cooling water chemistry.

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Section: A Clarification Through Coagulation and Flocculationmentioning

confidence: 99%

Management of Cooling Water Chemistry of Wet Cooled Power Plants in South Africa

2019

SETWM-19, ACBES-19, EEHSS-19 Nov. 18-19, 2019 Johannesburg (South Africa)

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“…6,11–14 - Adoption of additional cooling towers. 15,16 - Increasing the condenser size. 17,18 - Combustion Optimization and/or control.…”

Section: Introductionmentioning

confidence: 99%

Reduction of emissions and improvement of dynamic responses of a supercritical clean coal generation unit via neural network inverse control strategy

Mohamed

2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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Coal power plants have been a major source of undesirable emissions. Despite the technological advancements in renewable energies, coal units are still in-service in many developed and developing countries due to their reliability, adequacy, and flexibility for power delivery. There are some promising technologies for cleaner operation during power production from coal, including supercritical boiler (SC) design and carbon capture and storage (CCS), however, the challenging in innovating effective methods is still open to expand the boundary of knowledge in this speciality. This paper introduces a novel and simple method for reducing CO2 emissions and improving the dynamic responses of a 600 MW SC coal power plant by Artificial Neural Network (ANN) technique. A wide-range data-driven feedforward ANN model has been identified and verified for the various operations recorded as closed-loop data-sets, which covers all situations of startup, once-through mode, and even emergency shutdown of the unit. The closed-loop SC plant model has been augmented with an inverse multivariable coordinate NN controller, developed by analogous learning algorithm to improve the plant automation. With precisely selected setpoints, as operational rules, of temperature, pressure, and earliest possible power demand signals, the automated SC plant has been capable to operate with lower coal consumption - and thus lower emissions – than the existing operation strategy during startup, normal operation, and emergency shutdown modes. The improvement in dynamic responses have been quantified through simulations with comparison with existing performance, which have resulted in an overall average reduction of 2.143 Kg/s in coal consumption.

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“…Moreover, the developed mathematical model compared with the manufacturer's catalog at various operating conditions. Jovic et al [18] upgraded the design of prevailing WCT to increase the efficiency of a coal-fired power plant by adding two cells. The up-gradation of the plant had improved its performance by 1.5% and the rehabilitation cost was recovered under the payback period of one year.…”

Section: Introductionmentioning

confidence: 99%

4e (Energy, Exergy, Economic and Environmental) Analysis of the Novel Design of Wet Cooling Tower

Kumar

Zehra

Junejo

et al. 2020

Journal of Thermal Engineering

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This study aims to calculate the performance of the novel design of wet cooling tower (NDWCT) using first law (energy) and second law (exergy) of thermodynamics. Moreover, it determines the economic feasibility (cost savings and payback period) and sustainability of the NDWCT using the life-cycle cost (LCC) and environmental assessment method. An appropriate mathematical model is developed and simulated in Engineering Equation Solver to calculate water savings, performance and payback period of additional investment. The simulation results have a good agreement with the experimental outcomes (error 2.6%). Simulation results revealed that the NDWCT consumes 34.48% less water than the conventional wet cooling tower (WCT). The installation of heat exchanger improves the performance of WCT by 6% because the consumption of water to air ratio increases. Moreover, the exergy destruction in the NDWCT is 1.23 MW lower than the conventional WCT. Additionally, the heat exchanger costs k$30.7 to save an annual fuel cost of k$72 which could be recovered within a payback period of 0.37 years. Lastly, the environmental assessment proves that the NDWCT relinquishes the particulate matter emission by 0.042 g/s.

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Improving the energy efficiency of a 110 MW thermal power plant by low-cost modification of the cooling system

Cited by 13 publications

References 9 publications

Management of Cooling Water Chemistry of Wet Cooled Power Plants in South Africa

Management of Cooling Water Chemistry of Wet Cooled Power Plants in South Africa

Reduction of emissions and improvement of dynamic responses of a supercritical clean coal generation unit via neural network inverse control strategy

4e (Energy, Exergy, Economic and Environmental) Analysis of the Novel Design of Wet Cooling Tower

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