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2024 Vol.29, Issue 2

Research Article

A Study on the Efficiency Improvement of Fire-tube Boiler Structure and Fuel

노통연관보일러 구조 및 연료 종류에 따른 효율 향상 방안 연구

Cheol Su Shin1
,
Hyun Kyu Suh2†
신 철수1
,
서 현규2†
1Graduate School of Mechanical Engineering, Kongju National University
2Department of Mechanical and Automotive Engineering, Kongju National University
1공주대학교 기계공학과 대학원
2공주대학교 기계자동차공학부
*Corresponding Author
30 June 2024. pp. 1-10
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Abstract

This study was conducted to improve the thermal efficiency of the furnace-tube boiler to reduce fuel consumption and harmful exhaust emissions. To achieve this, flow analysis of the 3-pass boiler geometry was conducted by applying the SST k-ω turbulence model to simulate the flow of water and heat generated by combustion. The performances of the boiler were compared through the thermal efficiency of the boiler and the heat transfer rates in the furnace, 2nd pass, and 3rd pass. It was revealed that the change in materials and number of tubes showed a maximum thermal efficiency difference of 5.6%, which did not significantly impact the boiler performance. The most substantial efficiency improvement was observed with fuel changes, achieving the highest efficiency of 55.39% with LFG. This showed a 21.6% efficiency difference compared to the 33.78% thermal efficiency of LNG.

Keywords
Furnace-tube boiler
Combustion
Logarithmic Mean Temperature Difference(LMTD)
Thermal efficiency
Total heat transfer coefficient
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Information
  • Publisher :The Korean Society of Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of the Korean Society of Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 29
  • No :2
  • Pages :1-10
  • Received Date : 2024-04-04
  • Revised Date : 2024-05-15
  • Accepted Date : 2024-05-28
  • DOI :https://doi.org/10.15231/jksc.2024.29.2.001
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