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GAS PROCESSING SOLUTIONS 

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Case studies

 

NATURAL GAS, LNG, AIR PRODUCTS, & GENERAL INDUSTRIAL GASES

 

 PIPE SYSTEMS

  • Sizing of control valves and orifices.
  • Design of gas distribution systems.
  • Flow balancing in branching networks.
  • Analysis of transient events like surge analysis.
  • Control philosophy development and testing using the built-in PLC function block diagrams.
  • Calculation of pressure drop for gases or liquids.
  • Sizing of pressure safety valves.
  • Simulation of a valve failure event.
  • Calculation of heating or cooling requirements for various processes.
  • Heat loss/pickup calculations.
  • Insulation sizing.

 

FIRE PROTECTION SYSTEMS

  • Pump, pipe and tank sizing.
  • Sizing of nozzles and orifices.
  • Flow balancing.
  • Instrumentation selection & control philosophy.

Fire protection network

 

 

 

TURBOMACHINERY

  • Sizing of compressors and turbines.
  • Sizing of intercoolers and aftercoolers.
  • Simulation of compressor surge and surge protection measures.
  • Control philosophy development and testing using the built-in PLC function block diagrams.
  • Energy optimization.
  • Evaluation of off-design or process upset conditions.
  • Analysis of accident scenarios like turbine loss-of-load, check valve failure or loss of compressor intercooling.
  • Matching of turbine-driven compressors.

 

INTEGRATED SYSTEMS ANALYSIS

  • Liquefied natural gas (LNG) storage and handling.
  • Interaction between pipeline flow/pressure and the pump/turbine set including its control.
  • Cryogenic system thermalfluid analysis using twophase flow tanks, pressure drop, heat transfer, incondensable gas mixtures etc.
  • Simulation of refrigeration systems for cryogenic cooling during natural gas liquefaction.
  • Natural gas liquefaction.
  • Design of gas venting and inventory control systems.
  • Simulation of gas turbine driven pipelinebooster pumps.
  • Simulation or system integration of gas turbine driven compressors for natural gas liquefaction.
  • Pipe system pressure control design.

HEAT EXCHANGERS

  • Calculation of heat transfer and pressure drop for various geometries: finned tube, shell and tube, tube-in-tube, plate heat exchangers.
  • Calculating the heating or cooling requirement for various processes: evaporation, condensation or temperature control.
  • Calculation of natural circulation evaporators’ recirculation rate.
  • Calculation of boiling pressure drop and temperatures.
  • Simulation of transient behavior for start-up, shutdown or process upset conditions.
  • Calculation of metal temperature change rates during transients.

FLARES & BURNERS

  • Calculation of gas consumption rates.
  • Pressure-, temperature- and composition dependent combustion modeling.
  • Calculation of conjugate heat transfer(convective, conductive and radiativeheat transfer).
  • Calculation of heat-up or cool-down times.
  • Natural or forced draft stack sizing.
  • Fan sizing.
  • System integration: simulation of flarecontrol and interaction with the mainpipe system.

 

Gas processing network  

DRILLING MUD PUMPING SYSTEMS FOR GAS WELLS

  • Calculation of Non-Newtonian fluid pressure drop.
  • Balancing of flow in branching pipe networks.
  • Assessment of pressure pulse transients.

 

I am not aware of any other tool with which I could have obtained the required results in such a short time span. Part of the success must undoubtedly be attributed to the prompt and high level support provided by Flownex® International almost daily in answering all my questions and offering suggestions throughout this very technically challenging simulation. The support fee has been paid for with this one project!

Hannes van der Walt - Senior Thermal & Process Engineer - Gasco