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What is DLN?

Providing F-class efficiency for today’s changing energy mix

In the past, gas plants were engineered to provide base load efficient power, but today, with the dramatic increase of weather-dependent solar and wind capacity, gas plants are being asked to provide critical renewable-balancing grid support, making flexibility a priority now more than ever. DLN combustor systems not only provide this flexibility, but also help meet the needs of increasing emissions regulations. To remain competitive, F-class plant owners and operators must address the competing challenges of pressure to comply with more stringent emissions regulations, changing operating profiles that go beyond a plant’s original design, and finding innovative ways to stay profitable.

Building on a rich heritage of combustion leadership, our DLN combustion technology delivers industry-leading low emissions. For F class operators, we offer four DLN 2.6 solutions. What you choose will ultimately depend on you and your plant’s needs, but whichever DLN combustion system solution is right for you, rest assured that you’ll get leading-edge expertise and the operational flexibility you need, helping you reduce emissions and start up faster than ever before.

Which combustion system is right for you?

Want to learn more about DLN? Take a look at each solution’s features and benefits:

  DLN 2.6 DLN 2.6+ 7F DLN 2.6+ FLEX
Applicable turbine models 6F, 7F 6F, 7F, 9F 7F
Key value statement Get improved O&M outage interval costs. Take advantage of improved capacity, minimum fuel burn, and O&M part/outage costs. Turndown to ~26% GT load using GE's Axial Fuel Staging (AFS) technology. Reduce minimum fuel burn by 25%, leading to annual fuel savings of $1-4M.
Core benefits Outage extension
  • Outage extension
  • Emissions reduction
  • Enhanced load range
  • Lower turndown
  • Emissions reduction
  • Increased operational flexibility
  • Outage extension
  • Increased utilization
  • NOx/CO-compliant turndown as low as 25%
Emissions range <9ppm NOx and CO2 Up to 15ppm NOX (9F)
<9ppm NOX (7F)		 <9ppm NOX
Availability and maintenance cost
  • 24,000 factored fired hours (FFH)
  • 900 factored fired starts (FFS)
  • Up to 32,000 factored fired hours (FFH)
  • Up to 1,250 factored fired starts (FFS)
  • 32,000 factored fired hours (FFH)
  • 1,250 factored fired starts (FFS)
Operational flexibility (exact figures may vary by model) Extend turndown to as low as 48% of baseload Extend turndown to as low as 38% of baseload
  • Load range expansion by ~100 MW*
  • Lower turndown capability to 26% GT load
Fuel flexibility Over a range of natural gas or distillate fuel compositions Broad fuel flexibility with up to 30% Modified Wobbe Index (MWI), 25% ethane/propane, 20% hydrogen and a wide range of distillate fuels Broad fuel flexibility with up to 30% Modified Wobbe Index (MWI), 25% ethane/propane, 5-10% hydrogen and a wide range of distillate fuels
Add-ons
  • Improve operability when combined with OpFlex controls software including AutoTune, Fast Start, Cold-Day Performance, and Extended Turndown
  • Eliminate costly diluent injection or selective catalytic reduction (SCR) systems
  • Accelerate start times with OpFlex Fast Start, Variable Load Path, ST Agility, or ST Warming Blankets
  • Add maintenance neutral peaking with Dispatch Optimizer
  • Improve operability when combined with OpFlex controls software including AutoTune, and Cold-Day Performance
  • Eliminate costly diluent injection or selective catalytic reduction (SCR) systems
  • Enhance Advanced Gas Path (AGP) and compressor upgrade performance and operability
  • Accelerate start times with OpFlex Fast Start, Variable Load Path, ST Agility, or ST Warming Blankets
  • Add maintenance neutral peaking with Dispatch Optimizer
  • Improve operability when combined with OpFlex controls software including AutoTune, and Cold-Day Performance
  • Eliminate costly diluent injection or selective catalytic reduction (SCR) systems
  • Enhance Advanced Gas Path (AGP) and compressor upgrade performance and operability

*For a 2x1 configuration

7F DLN 2.6 technology

A 30-year journey

The 7F frame was developed at a time where deregulation and global warming were emerging factors in the power industry. GE has continued to evolve its F-class and DLN technologies, maintaining them as proven standards for economical, efficient, cleaner power generation.

Webinar

7F DLN 2.6+ AFS: Turn up your plant profitability with improved turndown

Register today to learn how to achieve lower turndown and reduce maintenance costs with GE’s latest flexibility solution—a variant of the Dry Low NOx (DLN) 2.6+ combustion system that adds Axial Fuel Staging (AFS) technology for further turndown capability.

Watch on demand
Case studies

Hear from our customers

Korea

South Korea’s KOSPO—an H-class evolution at its heart

3

NOx at the main stack, using DLNe 2.6 combustion

+64%

net combined cycle efficiency of the 7HA.03

“We are honored to support KOSPO in reducing carbon through power and thermal energy via liquefied natural gas. Natural gas-fired combined cycle power plants are the lowest emitting fossil fuel power plants, and with South Korea’s power generation stemming primarily from fossil sources, the 7HA will play a critical role in the transition to its lower carbon future.”

James Kim

GE Gas Power, Country Leader, South Korea

Read project

Case studies

Hear from our customers

United States

Southern California Public Power Authority (SCPPA)

25%

Reduced turndown and emissions

"SCPPA’s Magnolia power plant mission is to provide reliable low-cost power to Los Angeles County residents, and they wanted to both lessen operating losses that occurred during negative power prices and avoid starts, since the plant is limited to five starts per month based on their air permit."

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