Users familiar with UniSim Design will recognize a similar logical worksheet and data entry format in the PIPESYS extension. Perform iterative calculations to determine the required upstream pressure and the downstream temperature for a specified downstream pressure and upstream temperature.Ĭompute the flow rate corresponding to specified upstream and downstream conditions. Given the conditions at one end, perform pressure profile calculations either with or against the direction of flow to determine either upstream or downstream conditions. You can:Ĭompute the pressure profile using an arbitrarily defined temperature profile, or compute the pressure and temperature profiles simultaneously. There is considerable flexibility in the way calculations are performed. Flow regimes, liquid holdup and friction losses can also be determined. Horizontal, inclined and vertical flows may all be modelled. Quickly and efficiently perform calculations with the internal calculation optimizer, which significantly increases calculation speed without loss of accuracy.ĭetermine the possibility of increasing capacity in existing pipelines based on compositional effects, pipeline effects and environmental effects.1-2Ī wide variety of correlations and mechanistic models are used in computing the PIPESYS extension. Perform sensitivity calculations to determine the dependency of system behaviour on any parameter. Model single pipelines or networks of pipelines in isolation or as part of a UniSim Design process simulation. Perform special analyses including: pigging slug prediction, erosion velocity prediction, and severe slugging checks. Pumps, heaters, coolers, regulators and fittings including valves and elbows. model the effects of inline equipment such as compressors, perform forward and reverse pressure calculations. That traverse irregular terrain, both on shore and off. compute detailed pressure and temperature profiles for pipelines Rigorously model single phase and multi-phase flows. The extension models pipelines that stretch over varied elevations and environments. PIPESYS includes many inline equipment and facility options relevant to pipeline construction and testing. Functioning as a seamless extension to UniSim Design, PIPESYS has access to UniSim Design features such as the component database and fluid properties. It uses the most reliable single and multi-phase flow technology available to simulate pipeline flow. PIPESYS has far-reaching capabilities to accurately and powerfully model pipeline hydraulics. To accomplish this requires single and multi-phase flow technology that is capable of accurately and efficiently simulating the pipeline flow. Accurate fluid modelling helps to avoid these and other complications and results in a more economic pipeline system. With multi-phase flow, this can lead to greater pressure and temperature losses, increased requirements for liquid handling and increased pipe corrosion. It is not uncommon that during the design phase an over-sized pipe is chosen to compensate for inaccuracies in the pressure loss calculations. Due to the complexity of pipeline network calculations, this often proves a difficult task. Ideally this would be done efficiently with a correctly sized pipeline that adequately accounts for pressure drop, heat losses and includes the properly specified and sized inline facilities, such as compressors, heaters or fittings. 51-1ġ.1 Welcome to PIPESYSA pipeline must transport fluids over diverse topography and under varied conditions. C-2Ĭ.2 Vertical & Near Vertical Upflow/Downflow. 2-2Ģ.2 Adding a PIPESYS Extension to a UniSim Design Case2-3Ģ.3 PIPESYS User Interface. Future revisions will incorporate changes, including corrections of typographical errors and technical inaccuracies. Honeywell may make changes to the requirements described. The information in this help file is subject to change over time.