GAS network modeling

Dynamic & Steady State Hydraulic Gas Simulation Tool

  1. Gas network simulations are based on the one-dimensional continuity, momentum, energy, and state equations, derived from the laws of conservation of mass, momentum, energy, and the real gas law.
  2. Dynamic hydraulic models are used to correctly model the operation of gas transmission networks, as they are able to quantify the changes in pressure and linepack (which cannot be captured by mass balance or steady-state hydraulic models).
  3. Gas network models include pipelines, compressor stations, valves, regulators, underground storages, as well as different types of gas demands (e.g., gas-fired power plants and city-gate stations) and gas supplies (e.g., cross-border entry stations, gas production fields, and LNG regasification terminals).
  4. Gas compressibility is considered through an equation for the compressibility factor. The available equations for computing the gas compressibility include Papay, AGA, AGA8DC92, GERG2008, as well as additional custom equations. Furthermore, the gas model contains several options for computing the friction factor in the pressure drop equation, such as Hofer, Zanke, Nikuradze, and Colebrook-White equation.
  5. Gas networks can be simulated with gas quality, composition, and temperature tracking. The injection and blending of different gases (e.g., hydrogen) can be modeled.
  6. Different types of underground storage facilities (depleted oil and gas field, salt cavern, and aquifer storage) can be modeled using different storage envelopes, describing the restrictions on withdrawal and injection rates as a function of working gas inventory.
  7. The scheduling of the arrival of LNG vessels to LNG regasification terminals can be modeled.
  8. The discharge process of LNG vessel to the LNG storage tank can be modeled.

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