ENERGICO

ENERGICO augments the benefits of combustion CFD by enabling rapid calculations of NOx, CO, Soot (PM) and Lean Blow Off (LBO) simulations using accurate fuel combustion models that are often too detailed to be run directly in CFD.

ENERGICO is a complex system-design simulation tool that works by applying detailed chemistry models within a network of reactors that is constructed from a CFD solution. The high degree of accuracy afforded by ENERGICO’s novel approach can be used to solve the toughest combustor and burner engineering challenges related to emissions reduction and stability. Typical ENERGICO simulation times are a few hours. This allows engineers to set up and run many cases using a ”design-of-experiments” strategy in a fraction of the time that it takes to run a single CFD case. This also enables designers to develop accurate information on trends for combustion performance and emissions with realistic geometries, helping to drive the design process. By using ENERGICO to model and test new combustor designs, companies can save millions in gas turbine development costs and substantially reduce time-to-market when compared to development approaches that exclusively utilize physical prototype testing strategies.

Computational Fluid Dynamics (CFD) is the dominant tool for combustion simulation that supports the design of combustors and burners. However, CFD often falls short in the prediction of critical performance metrics such as CO and soot emissions, and LBO tendency, even after extensive model calibration and adjustment. The inaccuracies in CFD’s prediction of key phenomena can be directly linked to the limitation of most CFD software on the degree of detail that can be included in fuel models. In most cases, the models must be severely reduced in order to achieve a reasonable Time-to-Solution. ENERGICO removes this limitation and enables more accurate simulations that don’t delay a project’s timeline. 

Include More Accurate Chemistry in a Combuston Simulation

Equivalent Reactor Network (ERN)

ENERIGICO automatically maps the complex 3-D flow field of a combustor or burner to an Equivalent Reactor Network (ERN), where an accurate chemical model can be applied quickly. ENERGICO’s proprietary ERN Creation Algorithm dramatically reduces ERN construction time and improves the understanding of kinetics effects.

  • Automatically read in the CFD solution
  • Quickly adjust the ERN algorithm to ensure capturing the flow and flame structures appropriately
  • Rapidly apply ERN algorithm templates and accurate chemistry for emissions simulation
  • Set up automated parameter studies for for variations in important operating conditions, such as fuel/air ratio, fuel splits, inlet temperature and fuel composition 

Display CFD results with ERN overlay

Accurately Predict Emissions Performance

Equivalent Reactor Network (ERN)

Use the "Correct-by-Construction" Equivalent Reactor Network (ERN) created by ENERGICO to calculate the emissions from the combustor or burner, using a detailed chemical model. Track the formation and destruction of trace species, such as NOx, CO, unburned hydrocarbons, and other important emissions parameters.

  • Use a detailed chemical model to solve the ERN and track all the minor species and reactions
  • Improve accuracy by using the ERN energy equation and detailed chemistry to simulate the temperature in the reactors and compare to the CFD solution
  • Predict exit emissions from the combustor or burner for NOx at high power and CO/UHC at low power
  • Understand where the emissions are formed in the combustor

   Carbon Monoxide (CO) Results         Nitrogen Oxide (NOx) Results

Investigate Fuel Flexibility

Understanding the impact of fuel chemistry on combustion performance is impossible with CFD alone.

ENERGICO enables:

  • Use of detailed chemical models for accurate fuel chemistry calculation
  • Simulation of real fuel behavior for opportunity and alternative fuels inluding LNG, syngas, Fischer-Tropsch and biofuels
  • "Design-of-Virtual Experiments" by automatically executing parameter studies to help designers understand the impact of fuel compostion changes

    Syngas and Fischer-Tropsch         Bio-Diesel

Assess Lean Blow Off

Lean Blow Off (LBO)

Use ENERGICO to calculate local combustion stability related to LBO. Capture the cells in the CFD model associated with the flame and perform a detailed chemical kinetic and mixing analysis to determine how close the flame is to LBO.

  • Capture the flame in the CFD geometry
  • Conduct a detailed chemistry analysis locally in the flame
  • Determine the mixing rate from CFD
  • Determine the flame’s proximity to LBO
  • Visualize the flame within the geometry to guide design modifications

Capture the flame for LBO analysis


Investigating CO emissions is another method of assessing LBO tendency. Using an ERN prediction of CO to investigate LBO follows from the theory that in a typical combustor, a sudden increase in CO emissions typically occurs prior to the onset of combustor dynamics and LBO. Using ENERGICO, an ERN is constructed that closely predicts the CO emissions from the CFD case at either full or partial load (or power level). A parameter study is then performed on the ERN to determine the response of the CO emissions and to capture the “knee” of the CO curve. The LBO limit is determined when CO emissions rise above some threshold value. This approach can be used to investigate the impact of a number of design variables on LBO tendency.

  • Adjusting flow splits in the combustor
  • Changing operating conditions (e.g. temperature)
  • Assessing the impacts of fuel composition changes

Predict CO emission

Product Literature

Webinars

TitleDuration
Introduction to ENERGICO
Demonstration of how design engineers can use ENERGICO to seamlessly link detailed combustion chemistry and CFD for accurate simulation of combustion behavior.
00:56:04
Liquid Fuel Modeling with ENERGICO
Demonstrates how design engineers can use ENERGICO to simulate liquid fuel combustion in gas turbines, burners and industrial processes.
00:27:47

Soot Modeling in Gas Turbine Combustors, Burners and Boilers with ENERGICO
Demonstrates how to use ENERGICO to investigate soot formation in a liquid fueled gas turbine combustor.
00:44:08
Evaluating Lean Blow Off in Gas Turbines and Burners with Time-to-Solution that Fits Rapid Design Flows
Demonstrates how to use ENERGICO to evaluate LBO behavior for different designs and operating conditions.
00:35:43