![]() Stoner is the current state of the art, but it won't reverse the flow in that line at 25 psig off-system delivery pressure either. I've tested 40 current-generation programs at low pressures and have not found one that can handle my test cases (i.e., I calibrate the model to match a set of measured parameters in a pipe network, then input another set of measured parameters that happened to reverse the flow in one of the trunks, none of them will reverse the flow in that line and consequently the average wellhead pressure is more than 25% from the actual volume-weighted average). ![]() It is so old that it won't run on a 64 bit operating system so I keep a 16 bit machine around for models. I probably have the last functioning security device in the world for that software. Any model you purchase needs to be verified on an existing line prior to using it to predict a new network or an extension to a network.įor low pressures I use MNET from the now defunct SSI. They all have quirks (e.g., several versions of PipeFlow had a built in bias that forced flow to go from low numbered nodes to higher numbered nodes and if you messed up on your node numbering you got results that did not match measured values, another wouldn't allow you to input a compressor suction, just discharge and available horsepower). ![]() For gas that never gets much below 145 psig, most of the commercial products do an OK job. ![]()
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