Numerical Simulation of the Effect of SA/PA on Combustion and Flow Characteristics in a Front-Rear Burner 400 MWe Boiler

Dimitra Meidina Kusnadi*, Wawan Aries Widodo

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper will discuss computational fluid dynamics (CFD) modeling based on a 400 MWe boiler with the once-through tower type which is operated using low-rank coal to determine the effect of secondary air and primary air (SA/PA) ratios on boiler performance. This model was made with confidence after conducting an independence test and validation data on the boiler design. Then the boiler is simulated with SA/PA ratio conditions with different values, namely, 4.89, 3.87, and 3.15. The results show that the recommended SA/PA ratio, in this case 4.89 and 3.15, indicates a lower temperature value and lower flue gas flow velocity, which is also related to the ideal gas. The heat is too high which can potentially cause local heating and slagging in the heat exchanger area. However, low temperatures also indicate a decrease in boiler efficiency. It can be concluded that the SA/PA ratio based on recommendation can produce a temperature that is not too high which is good enough for avoiding slagging, fouling, and local heating but can reduce the efficiency of the boiler. where the low temperature is caused by the increasing number of primary air used can reduce the temperature in the combustion chamber.

Original languageEnglish
Title of host publicationRecent Advances in Mechanical Engineering - Select Proceedings of ICOME 2021
EditorsIvan Tolj, M.V. Reddy, Achmad Syaifudin
PublisherSpringer Science and Business Media Deutschland GmbH
Pages293-300
Number of pages8
ISBN (Print)9789811908668
DOIs
Publication statusPublished - 2023
Event5th International Conference on Mechanical Engineering, ICOME 2021 - Virtual, Online
Duration: 25 Aug 202126 Aug 2021

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364

Conference

Conference5th International Conference on Mechanical Engineering, ICOME 2021
CityVirtual, Online
Period25/08/2126/08/21

Keywords

  • Combustion
  • Computational fluid dynamics
  • SA/PA ratio

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