The most comprehensive hydraulic modeling software for gas networks

Trusted by pipeline engineers worldwide for 50+ years, Synergi Gas delivers unmatched accuracy and reliability for networks of any size and complexity.

Why pipeline engineers worldwide choose Synergi Gas

Synergi Gas provides the precision and confidence you need to design, analyze, and optimize gas networks while meeting today's regulatory and operational challenges:

  • Handle Extreme Complexity: Model networks of 1,000,000+ nodes with industry-leading computational power 
  • Ensure Regulatory Compliance: Meet strict safety and reporting requirements with detailed pressure analysis 
  • Reduce Operational Risks: Identify potential issues before they impact your network 
  • Optimize System Performance: Minimize energy consumption while maintaining reliability 
  • Future-Proof Your Infrastructure: Confidently plan for hydrogen blending and renewable gas integration

Comprehensive modelling package for pipeline engineering excellence

Create digital twins of your physical infrastructure with precise component representation and accurate fluid behavior: 

  • Multi-Component Gas Analysis: Model complex gas compositions including natural gas, hydrogen blends (up to 100%), biogas, ammonia, and CO₂ 
  • Comprehensive Flow Dynamics: Calculate pressure drops, flow rates, and velocity profiles with advanced flow equations and equations of state 
  • Thermal Modeling: Analyze heat transfer effects and temperature profiles throughout your network 
  • Multi-asset analysis: Analyze closed conduit networks of pipes, regulators, valves, compressors, storage fields, and production wells  
  • Component Tracking: Monitor gas composition changes across your entire system with detailed tracing functionality

Evaluate both normal operating conditions and dynamic system behavior during changing conditions with Synergi Gas’ complementary simulation approaches - Steady-State and Transient Analysis. The powerful analytical tools help identify potential issues before they occur in the field, reducing operational risks and optimizing system performance across various timeframes. 

  • Steady-State Simulation: Optimize network design and evaluate capacity constraints 
  • Transient Analysis: Predict dynamic system response to operational changes, equipment failures, or demand fluctuations 
  • Equation of State Options: Select from industry-standard models including AGA, GERG-2008, and Peng-Robinson 
  • Scenario Comparison: Evaluate multiple operational strategies with detailed differential analysis tools

Transform complex simulation data into actionable insights. Synergi Gas bridges the gap between theoretical modeling and practical application, helping you optimize system reliability while managing operational costs and regulatory compliance requirements. 

  • Load Approval Assessment: Determine system capacity for new customer connections 
  • Regulator and Compressor Optimization: Minimize energy consumption while maintaining system reliability 
  • Isolation Impact Analysis: Evaluate consequences of planned or emergency shutdowns 
  • Over-Pressurization Prevention: Ensure regulatory compliance and system safety through detailed pressure analysis 
  • Model Calibration: Compare simulation results with SCADA measurements for continual model refinement

As the industry evolves to meet decarbonization goals, Synergi Gas provides essential tools for managing the transition: 

  • Hydrogen Network Modeling: Assess infrastructure readiness for hydrogen injection at varying blend rates 
  • Renewable Gas Integration: Model biogas and synthetic methane introduction with composition tracking 
  • Energy Content Management: Account for calorific value variations in mixed-source networks 
  • Sectorization Analysis: Plan and implement network segmentation strategies for targeted energy transitions
Synergi Gas provides the computational power and flexibility demanded by today's pipeline engineers:
Feature Synergi Gas Capability

Feature

Network Scale

Synergi Gas Capability

From small distribution, gathering, and transmission systems to large networks with 1,000,000+ nodes 

Feature

Analysis Types

Synergi Gas Capability

Steady-state, extended period simulation, transient, thermal

Feature

Gas Compositions

Synergi Gas Capability

Natural gas, hydrogen blends, biogas, CO₂, ammonia, custom mixtures

Feature

Equations of State

Synergi Gas Capability

AGA, GERG-2008, Peng-Robinson, Redlich-Kwong, and more

Feature

Integration Capabilities

Synergi Gas Capability

Import data from SCADA, GIS, CIS, and enterprise systems

Feature

Computational Performance

Synergi Gas Capability

Multi-threading support for complex simulations

Feature

Reporting

Synergi Gas Capability

Customizable templates aligned with regional regulatory formats

Discover applications of our software

Robust modules for enhanced capabilities

Synergi Gas has extensive core steady-state modelling functionality out of the box, but sometimes more is needed. To meet your expanding needs, Synergi Gas has 10 purpose-built modules that work seamlessly:

Model Builder

The Model Builder module in Synergi Gas provides seamless integration with your GIS data and streamlines the process of building and maintaining Synergi Gas models by automating data import, converting GIS point data into linear facilities, and mapping source attributes to model data, thereby enhancing model efficiency and reducing maintenance time.

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Unsteady-State Module

The Unsteady-State module in Synergi Gas is a powerful tool for transient analysis, enabling you to manage linepack, simulate line breaks, gas blowdowns, and other dynamic events in gas networks. It allows for the modeling of complex pipeline systems, including compressors and storage fields, and simulates changes in gas composition and network conditions over time, facilitating volumetric or thermal balancing and the operation of facilities during simulations.

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Customer Management Module

Customer Management Module in Synergi Gas integrates with your Customer Information System (or customer billing system) to calculate temperature-dependent and base load factors, assigns these loads to the model, and enables display of customer information in the model.

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Area Isolation Module

The Area Isolation module in Synergi Gas assesses the hydraulic impact of emergency or planned outages. It is used for emergency planning, maintenance, and other operational needs, allowing users to analyze the impact of isolation on network pressure and flow, generate detailed reports, and identify affected customers, all within a user-friendly interface.

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Time-Varying Module

The Synergi Gas Time-Varying module performs a series of consecutive steady-state analyses to simulate changes in gas networks over time. It allows for long range planning of storage/gathering systems, link simulations for tasks like inventory tracking and maintenance scheduling, and determine system adequacy and fuel requirements, making it suitable for various gas systems.

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Regulator Station Module

The Regulator Station module in Synergi Gas is designed to protect distribution systems from overpressure conditions. It supports monitoring and reporting on safety equipment, ensuring compliance with regulations, and offers features such as an extensive equipment catalogue, analysis of relief valve piping, and generation of detailed station reports to enhance safety and reliability while reducing maintenance efforts.

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Automated Design Module

The Automated Design module in Synergi Gas enables you to optimize network efficiency and keep costs down.  It helps in designing new systems or upgrading existing ones by analyzing pipe size options based on loading conditions, material costs, and installation costs, ensuring a cost-effective and reliable network design. 

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Optimization Module

The Optimization module, or Optimizer, in Synergi Gas is designed to optimize fuel consumption and costs for gas transmission pipelines. It analyzes pipeline throughput, identifies bottlenecks, and optimizes compressor operations to maximize system throughput or minimize fuel costs.

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Facilities Management Module

The Facilities Management module in Synergi Gas synchronizes gas distribution network models with GIS updates without requiring a full rebuild. It allows users to compare models, review changes spatially, and selectively integrate updates, streamlining maintenance tasks and enhancing model management flexibility.

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Trusted by by pipeline engineers worldwide

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The Synergi Gas advantage for network analysis and hydraulic modelling

  • Comprehensive commercial off-the-shelf software with an intuitive user interface 
  • World-class technical support and training 
  • Unrivalled program configurability and flexibility 
  • Extensive selection of powerful “snap-on” modules 
  • Capable of handling the largest models in the industry 
  • Models gathering, transmission and local distribution systems 
  • Integration with GIS, CIS, and other important systems 
  • Open model data formats always ensure data access

Frequently asked questions about Synergi Gas software:

With Synergi Gas from DNV GL you can quickly build a model of your new pipeline, either by hand or in a more automated fashion with CAD drawings or GIS data. If terrain is significant, there are several methods available to assign elevation data along your proposed pipeline. Enter the pipeline data, properties of the gases, projected meters for consumption, and supply pressures to complete the model in the hydraulic circuit design software.

The Synergi Gas Steady-State engine will quickly return the calculated pressures throughout the system. If the results prove that you need additional compression, the program includes a tool for determining the number of compressor stations required, along with the recommended spacing between them. Once you’ve received the compressor curves from the vendor(s), you can input this data into Synergi Gas for a more accurate model of the compressor station behaviour. Finally, if you really want to get the most out of your new pipeline, you can take that same model used for the steady state analysis and also run a transient analysis using the Unsteady State module in Synergi Gas, so that you can plan how to maximize the line pack available.

Absolutely. You can replicate the event in DNV GL’s Synergi Gas software by modelling the rupture location along with the pressures and flows at the time of the rupture. The Unsteady State module transient analysis will provide you with a complete picture of the resulting pressures and volume of gas lost. You can then try alternate measures – interrupt fewer customers, close a different set of valves, and so on – to assess how the outcome may have changed. You can then apply this knowledge to additional scenarios throughout the gas distribution system.

For low pressure systems, the steady-state analysis is appropriate for line break models. However, a low-pressure distribution system presents a different set of challenges due to the sheer number of isolation valves that are available. For very interconnected systems, it may be difficult to quickly tell not just which valves need to be closed, but also what the hydraulic impact is of these closures. The Synergi Gas Area Isolation module in Synergi Gas solves this problem by showing you the required valves for closure to isolate any pipe or zone of your choosing. And if you’re using the Customer Management module, the program can generate a list of the affected customers, along with their contact information and load characteristics.

Aside from Model Builder module and the Customer Management module in Synergi Gas, automating the module building and load generation process, Synergi Gas offers ways to help you work smarter. For example, you can combine studies under one model using flow categories for various load scenarios, and partial sets for your system reinforcement options, allowing you to quickly view any combination of analyses, including reports and charts with your results. You can also use Version Management if you have multiple users of the hydraulic modelling software, and it becomes difficult to keep track of changes to your master model. Version Management sets up a library with user permissions that tracks add, modify, and delete transactions in a parent (base model) / child (versions) relationship. Any change to the parent gets inherited by the children, and any changes to the children can be promoted to the parent.

Synergi Gas software from DNV GL can help determine if other low pressure stations can help distribute the shortfall through distributed relief and provide associated pressures within the network as well as identify bottlenecks in the gas distribution system.

YES! We have a relatively new module in Synergi Gas called the Regulator Station module which helps you ensure your safety equipment protects your downstream gas distribution system. It helps you prove compliance by analysing station header, branch, and stack piping, as well as failed regulator and relief capacities at MAOP and MOP pressure levels. Please contact your DNV GL - Software Sales sales representative for a demo today.