update delta T HX

equinor · Aug 4, 2024 · 2b1d5bb · 2b1d5bb
1 parent c676263
commit 2b1d5bb
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Showing 2 changed files with 31 additions and 22 deletions.
diff --git a/src/main/java/neqsim/processSimulation/processEquipment/heatExchanger/HeatExchanger.java b/src/main/java/neqsim/processSimulation/processEquipment/heatExchanger/HeatExchanger.java
@@ -48,12 +48,6 @@ public class HeatExchanger extends Heater implements HeatExchangerInterface {
   private String flowArrangement = "concentric tube counterflow";
   private boolean useDeltaT = false;
 
-  public void setUseDeltaT(boolean useDeltaT) {
-    this.useDeltaT = useDeltaT;
-  }
-
-  private double deltaT = 1.0;
-
   /**
    * <p>
    * Constructor for HeatExchanger.
@@ -349,6 +343,9 @@ public void runDeltaT(UUID id) {
       }
       duty = dEntalphy;
       hotColdDutyBalance = 1.0;
+
+      UAvalue = dEntalphy / (outStream[streamToSet].getThermoSystem().getTemperature()
+          - inStream[streamToSet].getThermoSystem().getTemperature());
     }
 
     setCalculationIdentifier(id);
@@ -743,4 +740,21 @@ public String toJson() {
     return new GsonBuilder().serializeSpecialFloatingPointValues().create()
         .toJson(new HXResponse(this));
   }
+
+
+  public void setUseDeltaT(boolean useDeltaT) {
+    this.useDeltaT = useDeltaT;
+  }
+
+  private double deltaT = 1.0;
+
+  public double getDeltaT() {
+    return deltaT;
+  }
+
+  public void setDeltaT(double deltaT) {
+    useDeltaT = true;
+    this.deltaT = deltaT;
+  }
+
 }
diff --git a/src/test/java/neqsim/processSimulation/processEquipment/heatExchanger/HeatExchangerTest.java b/src/test/java/neqsim/processSimulation/processEquipment/heatExchanger/HeatExchangerTest.java
@@ -75,11 +75,6 @@ void testRun1() {
     // resyc.getOutStream().displayResult();
   }
 
-  private void assertEqualse(double duty, double d, double e) {
-    // TODO Auto-generated method stub
-    throw new UnsupportedOperationException("Unimplemented method 'assertEqualse'");
-  }
-
   @Test
   void testRun2() {
     Stream stream_Hot = new Stream("Stream1", testSystem);
@@ -107,18 +102,18 @@ void testRun2() {
 
     operations.run();
     assertEquals(heatExchanger1.getDuty(), -9674.051890272862, 1e-1);
-    // heatExchanger1.setDe
-    heatExchanger1.setUseDeltaT(true);
+
+    heatExchanger1.setDeltaT(1.0);
     heatExchanger1.run();
-    heatExchanger1.getInStream(0).getFluid().prettyPrint();
-    heatExchanger1.getInStream(1).getFluid().prettyPrint();
-    heatExchanger1.getOutStream(0).getFluid().prettyPrint();
-    heatExchanger1.getOutStream(1).getFluid().prettyPrint();
-    // operations.displayResult();
-    // heatExchanger1.getOutStream(0).displayResult();
-    // heatExchanger1.getOutStream(1).displayResult();
-
-    // heatExchanger1
+
+    assertEquals(15780.77130, heatExchanger1.getUAvalue(), 1e-3);
+
+    heatExchanger1 = new neqsim.processSimulation.processEquipment.heatExchanger.HeatExchanger(
+        "heatEx", stream_Hot, stream_Cold);
+    heatExchanger1.setDeltaT(1.0);
+    heatExchanger1.run();
+
+    assertEquals(15780.77130, heatExchanger1.getUAvalue(), 1e-3);
 
   }
 }