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How a Power Plant Reduced Emissions and Improved Reliability

Real-World Engineering Case Study from Kiewit Engineering Group

Source: Foss and Co.

Meeting New Emissions Requirements Without Disrupting Operations

Power generation facilities are facing increasingly stringent emissions regulations while still being expected to maintain reliability and consistent power output.

For many operators, the challenge is balancing compliance with cost, plant performance, and operational constraints.

In this case study, engineers at Kiewit Engineering Group were tasked with evaluating whether an aging auxiliary steam system at a commercial power plant could support the reactivation of a glycol heating system designed to mitigate emissions-related operational issues.

Using advanced modeling tools, the engineering team was able to identify system constraints, simulate multiple operating scenarios, and recommend targeted infrastructure upgrades that improved plant performance and emissions compliance.

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Kiewit Engineering Group Reduces Emissions at Commercial Power Plant with Arrow

This engineering case study explores how modeling and simulation helped optimize a complex steam system supporting four aging coal boilers.

What You’ll Learn

Inside this case study, discover how engineering teams used advanced flow modeling to:

  • Evaluate whether an existing auxiliary steam system could support additional loads
  • Simulate multiple operating scenarios across four coal-fired units
  • Identify critical constraints in existing piping infrastructure
  • Determine the required upgrades to support system expansion
  • Improve plant reliability while supporting emissions reduction initiatives

The Engineering Challenge

The plant sought to reactivate a glycol heating system designed to prevent acid formation during cold-weather startup conditions. Without proper heating, exhaust gases can drop below the acid dew point, damaging air preheaters and reducing plant efficiency.

However, the facility’s existing auxiliary steam system had been partially abandoned decades earlier and required careful analysis to determine whether it could support both existing and future steam demands.

Engineering teams needed to answer a critical question:

Could the current system handle the required steam flow—or would key infrastructure need to be upgraded?

The Solution: Advanced System Modeling

Using Datacor’s Arrow modeling software, engineers simulated multiple operating scenarios across the plant’s steam network.

By analyzing system constraints—including steam velocity, flow restrictions, and piping limitations—the team was able to determine that upgrading the existing 6-inch crosstie pipeline to a 10-inch line would enable sufficient steam delivery across the system.

The modeling approach allowed the plant owner to confidently make infrastructure decisions before implementation—saving significant time and engineering resources.

Key Outcomes

The project delivered several important operational benefits:

  • Improved emissions performance through glycol system reactivation
  • Increased reliability and operability of the auxiliary steam system
  • Infrastructure upgrades that support future plant improvements
  • Faster engineering analysis compared to manual calculations

As one Kiewit engineer noted, the complexity of compressible steam flow calculations would have made manual analysis extremely time-consuming, while modeling enabled faster and more accurate decision-making.

Who Should Read This Case Study

This resource is designed for professionals responsible for power plant design, optimization, and operations, including:

  • Power plant engineers
  • Utility operations managers
  • EPC and consulting engineers
  • Reliability and asset management teams
  • Thermal systems engineers

Download the Case Study

Learn how engineering teams used advanced modeling to optimize plant infrastructure, improve reliability, and support emissions compliance.

Complete the form to access the full case study.

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