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EvenSolSviatose
EvenSol
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Sviatose
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Bug error with flash calc (#843)
* bug: error with flash calc Gudrun * temporary "fix" bug in stabiilty analysis --------- Co-authored-by: Sviatoslav Eroshkin <[email protected]>
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‎src/main/java/neqsim/thermodynamicOperations/flashOps/TPmultiflash.java

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@@ -375,7 +375,7 @@ public void stabilityAnalysis() {
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iter++;
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err = 0;
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if (iter <= 150 || !system.isImplementedCompositionDeriativesofFugacity()) {
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if (iter <= 250 || !system.isImplementedCompositionDeriativesofFugacity()) {
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if (iter % 7 == 0) {
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double vec1 = 0.0;
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‎src/test/java/neqsim/thermodynamicOperations/flashOps/GudrunDegasser.java

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package neqsim.thermodynamicOperations.flashOps;
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import java.util.ArrayList;
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import java.util.List;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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import neqsim.thermo.phase.PhaseEosInterface;
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import neqsim.thermodynamicOperations.ThermodynamicOperations;
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/**
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* @author ESOL
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*
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*/
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class GudrunDegasser {
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static neqsim.thermo.system.SystemInterface testSystem = null;
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static ThermodynamicOperations testOps = null;
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/**
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* @throws java.lang.Exception
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*/
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@BeforeEach
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void setUp() throws Exception {
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testSystem = new neqsim.thermo.system.SystemPrEos(243.15, 300.0);
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testSystem.addComponent("methane", 90.0);
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testSystem.addComponent("ethane", 0.0);
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testSystem.addComponent("propane", 0.0);
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testSystem.addComponent("i-butane", 0.0);
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testSystem.addComponent("n-butane", 0.0);
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testSystem.addComponent("i-pentane", 0.0);
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testSystem.addComponent("n-pentane", 0.0);
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testSystem.addComponent("n-hexane", 0.0);
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testSystem.addComponent("nitrogen", 10.0);
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testSystem.setMixingRule("classic");
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}
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/**
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* Test method for {@link neqsim.thermodynamicOperations.flashOps.PHFlash#run()}.
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*/
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@Test
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void testRun() {
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neqsim.thermo.system.SystemInterface fluid1 =
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new neqsim.thermo.system.SystemSrkCPAstatoil(273.15 + 42.0, 10.00);
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fluid1.addComponent("nitrogen", 0.110282450914383);
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fluid1.addComponent("CO2", 8.92014980316162);
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fluid1.addComponent("methane", 72.3870849609375);
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fluid1.addComponent("ethane", 5.19349813461304);
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fluid1.addComponent("propane", 5.20273065567017);
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fluid1.addComponent("i-butane", 0.436239510774612);
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fluid1.addComponent("n-butane", 1.39356422424316);
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fluid1.addComponent("i-pentane", 0.769362509250641);
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fluid1.addComponent("n-pentane", 0.543137490749359);
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fluid1.addComponent("n-hexane", 3.90587639808655);
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fluid1.addComponent("n-heptane", 3.90587639808655);
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fluid1.addComponent("water", 40.0);
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fluid1.setMixingRule(10);
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fluid1.setMultiPhaseCheck(true);
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ThermodynamicOperations testOps = new ThermodynamicOperations(fluid1);
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testOps.TPflash();
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double[] intParameter = {
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-0.24, // "CO2"
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-0.721, // "methane"
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0.11, // "ethane"
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0.205, // "propane"
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0.081, // "i-butane"
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0.17, // "n-butane"
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0.051, // "i-pentane"
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0.1135, // "n-pentane"
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0.0832, // "n-hexane"
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0.0535 // "n-heptane"
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};
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String[] componentNames = fluid1.getComponentNames();
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for (int i = 0; i < intParameter.length; i++) {
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int componentIndex = findComponentIndex(componentNames, componentNames[i + 1]);// except
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// nitrogen 0
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int waterIndex = findComponentIndex(componentNames, "water");
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if (componentIndex != -1 && waterIndex != -1) {
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((PhaseEosInterface) fluid1.getPhases()[0]).getMixingRule()
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.setBinaryInteractionParameter(componentIndex, waterIndex, intParameter[i]);
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((PhaseEosInterface) fluid1.getPhases()[1]).getMixingRule()
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.setBinaryInteractionParameter(componentIndex, waterIndex, intParameter[i]);
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} else {
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}
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}
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testOps.TPflash();
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fluid1.prettyPrint();
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List<Double> molarComposition = new ArrayList<>();
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molarComposition.add(0.07649963805789309);
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molarComposition.add(10.028287212684818);
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molarComposition.add(49.52052228615394);
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molarComposition.add(3.64093888905641);
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molarComposition.add(3.6620992636511893);
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molarComposition.add(0.2995511776378937);
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molarComposition.add(0.9605423088257289);
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molarComposition.add(0.5032398365065283);
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molarComposition.add(0.36145746378993904);
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molarComposition.add(0.2364703087561068);
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molarComposition.add(2.732003176453634);
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molarComposition.add(27.978388438425913);
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double[] molarCompositionArray =
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molarComposition.stream().mapToDouble(Double::doubleValue).toArray();
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neqsim.thermo.system.SystemInterface fluid_test_separator = fluid1.clone();
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fluid_test_separator.setMolarComposition(molarCompositionArray);
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neqsim.processSimulation.processEquipment.stream.Stream inlet_stream_test_sep =
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new neqsim.processSimulation.processEquipment.stream.Stream("TEST_SEPARATOR_INLET",
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fluid_test_separator);
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inlet_stream_test_sep.setTemperature(72.6675872802734, "C");
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inlet_stream_test_sep.setPressure(10.6767892837524, "bara");
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inlet_stream_test_sep.setFlowRate(721.3143271348611, "kg/hr");
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inlet_stream_test_sep.run();
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neqsim.processSimulation.processEquipment.separator.ThreePhaseSeparator test_separator =
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new neqsim.processSimulation.processEquipment.separator.ThreePhaseSeparator(
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inlet_stream_test_sep);
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test_separator.setName("TEST_SEPARATOR");
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test_separator.run();
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test_separator.getWaterOutStream().getThermoSystem().prettyPrint();
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neqsim.processSimulation.processEquipment.heatExchanger.Heater heater_TP_setter_test_stream =
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new neqsim.processSimulation.processEquipment.heatExchanger.Heater(
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"TP_SETTER_FOR_THE_DEGASSER_TEST_SEP_STREAM", test_separator.getWaterOutStream());
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heater_TP_setter_test_stream.setOutPressure(5.9061164855957 - 0.01, "bara");
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heater_TP_setter_test_stream.setOutTemperature(79.8487854003906, "C");
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heater_TP_setter_test_stream.run();
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System.out.println("Gas out from degasser " + heater_TP_setter_test_stream.getOutStream()
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.getFluid().getPhase("gas").getFlowRate("kg/hr"));
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heater_TP_setter_test_stream.getOutStream().getThermoSystem().prettyPrint();
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neqsim.processSimulation.processEquipment.heatExchanger.Heater heater_TP_setter_test_stream2 =
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new neqsim.processSimulation.processEquipment.heatExchanger.Heater(
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"TP_SETTER_FOR_THE_DEGASSER_TEST_SEP_STREAM", test_separator.getWaterOutStream());
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heater_TP_setter_test_stream2.setOutPressure(5.9061164855957, "bara");
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heater_TP_setter_test_stream2.setOutTemperature(79.8487854003906, "C");
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heater_TP_setter_test_stream2.run();
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System.out.println("Gas out from degasser2 " + heater_TP_setter_test_stream2.getOutStream()
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.getFluid().getPhase("gas").getFlowRate("kg/hr"));
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}
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private int findComponentIndex(String[] componentNames, String componentName) {
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for (int i = 0; i < componentNames.length; i++) {
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if (componentNames[i].equals(componentName)) {
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return i;
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}
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}
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return -1; // Component not found
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}
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}

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