Abstract
A numerical simulation for analysis and optimization of the performance and NOx production was applied to a natural gas fuel boiler in South Pars Gas Complex. For this purpose, nine actual environmental and operational parameters of a boiler were measured and recorded every two hours and then averaged daily for a year. Using the thermodynamic laws, important parameters such as body and exhaust flue gas losses, as well as the thermal efficiency and exergy efficiencies of the combustor and boiler, were calculated for each day. The results show that, owing to changes in the environmental and operational conditions, the thermal and exergy efficiency of the boiler varied from 83% to 87% and 27% to 32%, respectively, during the year. In addition, by optimizing the excess air percentage, the thermal and exergy efficiencies could be increased by 1.5% and 3%, respectively, for most days of the year.
Highlights
Optimization of a Utility Boiler BasedNowadays, the optimized consumption of energy is one of the most important concerns of human beings [1,2,3]
Li et al [9] examined the effects of various fossil fuels such as coal, oil, and natural gas on the boiler performance, and the results indicate that natural gas is better than fossil fuels
As evident in the previous investigations, the percentage of excess air has a determining its optimal amount on different days of the year can lead to an improved performance and reduce the production of air pollutants
Summary
The optimized consumption of energy is one of the most important concerns of human beings [1,2,3]. For calculating the evaluation parameters, such as energy and exergy efficiencies, and pollutant emissions, a considerable amount of the boiler’s environmental and operational information needs to be measured and recorded during a year Based on this information, the boiler performance is monitored instantaneously, and a comprehensive control program can be developed to achieve optimal operating conditions for every moment throughout the year. The boiler performance is monitored instantaneously, and a comprehensive control program can be developed to achieve optimal operating conditions for every moment throughout the year In this current research, a thermo-environmental study using energy, exergy, and environmental analysis is conducted to evaluate the performance of boilers in refinery. With the operational calculations carried out in different boiler sections, operational recommendations for optimizing boilers are suggested
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