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Aerothermodynamics & Combustion Analysis 2012

Coal Burner Aerothermodynamics Study

PLTU Labuan 300 MW

Computational aerothermodynamics analysis to evaluate burner geometry, combustion behavior, and thermal distribution in a large-scale coal-fired furnace.

Coal Burner CFD Simulation
CFD Simulation — Coal Burner Aerothermodynamics Analysis

Project Details

Project Type Aerothermodynamics & CFD Analysis
Industry Thermal Power Generation
Location PLTU Labuan, Indonesia
Plant Capacity 300 MW
Year 2012
Method CFD Numerical Simulation

Project Overview

Coal burner geometry plays a critical role in combustion stability, temperature distribution, and emission formation within a power plant furnace.

This project focused on a Computational Fluid Dynamics (CFD) aerothermodynamics study of coal burners at PLTU Labuan 300 MW, comparing circular and rectangular burner configurations under identical operating conditions.

The objective was to understand how burner geometry influences flame development, temperature distribution, combustion location, and NOx formation potential.

The Challenge

The existing burner configuration raised several operational concerns:

  • 🔥
    Non-uniform Temperature

    Non-uniform temperature distribution inside the furnace

  • ⚠️
    High Flame Temperature

    High local flame temperature contributing to NOx formation

  • 🏭
    Wall Proximity

    Combustion occurring too close to furnace walls

  • 📊
    Limited Flexibility

    Limited flexibility for emission optimization

Study Objectives

  • 🔬
    Burner Comparison

    Compare aerothermodynamic behavior of circular and rectangular burner designs

  • 🌡️
    Temperature & Velocity

    Evaluate temperature and velocity distribution inside the furnace

  • 📍
    Combustion Location

    Identify combustion location relative to furnace axis and walls

  • 📉
    NOx Reduction

    Assess implications for NOx reduction and combustion stability

Burner Configuration & Operating Conditions

01

Burner Geometry

  • Original Design: Circular burner (RI-JET2 type) with three concentric inlets
  • Primary inlet: pulverized coal + primary air
  • Secondary inlets: swirling air flow
  • Modified configurations with reduced inlet area
02

Furnace Configuration

  • 5 burner levels
  • 4 burners per level
  • Burners located at furnace corners
  • Tangential firing arrangement
03

Operating Conditions

  • Output Load: 200 MW
  • Coal Flow Rate: 170 ton/hour
  • Hot Air Flow: 625 ton/hour
  • Total Air Flow: 825 ton/hour
04

CFD Methodology

  • Geometric modeling of circular and rectangular burners
  • Mesh generation for burner and furnace domains
  • Identical mass flow and velocity boundary conditions
  • Comparative simulation of burner and furnace domains

Key Results

🌡️

Temperature Distribution: Circular burner produced lower exit temperature compared to rectangular burner, reducing thermal NOx formation potential.

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Combustion Behavior: Circular burner combustion was more centralized, similar to full-furnace behavior. Rectangular burner showed wider spread toward walls.

💨

Velocity & Flow Pattern: Circular burner generated more uniform swirling flow with improved flame stability and mixing characteristics.

Conclusion: Original circular burner geometry provides superior combustion control and supports NOx reduction strategies.

The study confirms that burner geometry optimization is a powerful tool for improving combustion quality and emissions without major hardware changes.

Project Gallery

Project Impact

Operational Value

  • Improved combustion stability
  • Reduced risk of wall overheating
  • Enhanced emission control potential

Strategic Value

  • Data-driven basis for burner redesign or retrofit
  • Supports low-NOx combustion strategies
  • Informs future furnace optimization programs

Why Garuda Engineering

Garuda Engineering delivers advanced combustion insight through proven expertise and rigorous methodology.

  • Deep expertise in CFD and aerothermodynamics
  • Experience in coal-fired furnace systems
  • Ability to translate simulation results into operational guidance
  • Proven track record in thermal power plant optimization
"We convert numerical flow fields into practical combustion solutions."

Optimize Your Combustion System

Looking to improve combustion efficiency or reduce emissions through burner optimization? Contact Garuda Engineering for an aerothermodynamics study.