SYSTEK Technologies, Inc. LIQTHERM


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LIQTHERM -  - SYSTEK Technologies, Inc.
Lake Havasu City, AZ, USA
LIQTHERM simulates the steady state hydraulics of a heated liquid pipeline with several pump and heater stations, considering heat transfer with the surrounding medium. If desired, isothermal hydraulics may also be modeled. The pipeline may be buried or portions may be above-ground. Various liquid products may be injected or stripped at locations along the pipeline. The resultant blended liquid properties (specific gravity and viscosity) are calculated for each pipe segment at the flowing liquid temperature. Batching of different liquids can also be simulated by specifying the batch size, specific gravity and viscosity of each liquid batch. Pressure drop for each pipe segment is calculated using one of the various equations, such as Colebrook-White, Moody, Miller, MIT, T.R. Aude or Hazen-Williams. Multiple pump stations along the pipeline may be modeled, considering pump curve data. The pump performance data (flow rate, head and efficiency) may be specified for each pump station along with the pump configuration (series or parallel). If pump curve data is not available, each pump station may be assigned an average pump efficiency for calculating the horsepower required. Calculations can be performed such that maximum allowable operating pressure (MAOP) of each pipe segment is not exceeded. Optionally, the MAOP check may be turned off to determine the maximum pumping capability for a given pipeline and pump station configuration. Branch piping and parallel piping (pipe loops) off the main pipeline can also be modeled. The liquid temperature, specific gravity, viscosity and the pressure profile along the pipeline at the flow rates are calculated considering heat transfer with the surroundings. Using the input values of pipe, insulation and soil thermal conductivities, heat transfer and pressure drop calculations proceed along the length of the pipeline. The heat generated due to friction is included in the temperature calculations. For high viscosity liquids, the API method for calculating the effect of high viscosity on pressure can be included, as an option. If heaters are present, the heater duty at each heater station site is calculated based on the specified heater outlet temperature, heater efficiency and the calculated liquid temperature at the heater inlet. The total pump horsepower required at each pump station is calculated, by considering the combined pump performance based on the pump configuration.
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Technical Specifications

  SYSTEK Technologies, Inc.
Product Category Computational Fluid Dynamics Software (CFD)
Product Name LIQTHERM
Source Code Proprietary
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