diff --git a/src/main/java/neqsim/processsimulation/processequipment/absorber/SimpleAbsorber.java b/src/main/java/neqsim/processsimulation/processequipment/absorber/SimpleAbsorber.java
index 3a26f044e..59eb766b7 100644
--- a/src/main/java/neqsim/processsimulation/processequipment/absorber/SimpleAbsorber.java
+++ b/src/main/java/neqsim/processsimulation/processequipment/absorber/SimpleAbsorber.java
@@ -76,12 +76,6 @@ public SimpleAbsorber(String name, StreamInterface inStream1) {
     outStream[1].run();
   }
 
-  /** {@inheritDoc} */
-  @Override
-  public AbsorberMechanicalDesign getMechanicalDesign() {
-    return new AbsorberMechanicalDesign(this);
-  }
-
   /** {@inheritDoc} */
   @Override
   public void setName(String name) {
@@ -160,24 +154,26 @@ public void setOutTemperature(double temperature) {
 
   /**
    * <p>
-   * getOutTemperature.
+   * Get temperature of outstream i.
    * </p>
    *
    * @param i a int
+   * @return a double
    */
-  public void getOutTemperature(int i) {
-    outStream[i].getThermoSystem().getTemperature();
+  public double getOutTemperature(int i) {
+    return outStream[i].getThermoSystem().getTemperature();
   }
 
   /**
    * <p>
-   * getInTemperature.
+   * * Get temperature of instream i.
    * </p>
    *
    * @param i a int
+   * @return a double
    */
-  public void getInTemperature(int i) {
-    inStream[i].getThermoSystem().getTemperature();
+  public double getInTemperature(int i) {
+    return inStream[i].getThermoSystem().getTemperature();
   }
 
   /** {@inheritDoc} */
@@ -371,4 +367,10 @@ public double getWettingRate() {
     double intArea = 3.14 * getInternalDiameter() * getInternalDiameter() / 4.0;
     return getLiquidOutStream().getThermoSystem().getFlowRate("m3/hr") / intArea;
   }
+
+  /** {@inheritDoc} */
+  @Override
+  public AbsorberMechanicalDesign getMechanicalDesign() {
+    return new AbsorberMechanicalDesign(this);
+  }
 }
diff --git a/src/main/java/neqsim/processsimulation/processequipment/adsorber/SimpleAdsorber.java b/src/main/java/neqsim/processsimulation/processequipment/adsorber/SimpleAdsorber.java
index 7ff47ef22..6312399c7 100644
--- a/src/main/java/neqsim/processsimulation/processequipment/adsorber/SimpleAdsorber.java
+++ b/src/main/java/neqsim/processsimulation/processequipment/adsorber/SimpleAdsorber.java
@@ -75,12 +75,6 @@ public SimpleAdsorber(String name, StreamInterface inStream1) {
     outStream[1].run();
   }
 
-  /** {@inheritDoc} */
-  @Override
-  public AdsorberMechanicalDesign getMechanicalDesign() {
-    return new AdsorberMechanicalDesign(this);
-  }
-
   /** {@inheritDoc} */
   @Override
   public void setName(String name) {
@@ -125,24 +119,24 @@ public void setOutTemperature(double temperature) {
 
   /**
    * <p>
-   * getOutTemperature.
+   * Get temperature of outstream i.
    * </p>
    *
    * @param i a int
    */
-  public void getOutTemperature(int i) {
-    outStream[i].getThermoSystem().getTemperature();
+  public double getOutTemperature(int i) {
+    return outStream[i].getThermoSystem().getTemperature();
   }
 
   /**
    * <p>
-   * getInTemperature.
+   * Get temperature of instream i.
    * </p>
    *
    * @param i a int
    */
-  public void getInTemperature(int i) {
-    inStream[i].getThermoSystem().getTemperature();
+  public double getInTemperature(int i) {
+    return inStream[i].getThermoSystem().getTemperature();
   }
 
   /** {@inheritDoc} */
@@ -316,4 +310,10 @@ public double getNTU() {
   public void setNTU(double NTU) {
     this.NTU = NTU;
   }
+
+  /** {@inheritDoc} */
+  @Override
+  public AdsorberMechanicalDesign getMechanicalDesign() {
+    return new AdsorberMechanicalDesign(this);
+  }
 }
diff --git a/src/main/java/neqsim/processsimulation/processequipment/heatexchanger/HeatExchanger.java b/src/main/java/neqsim/processsimulation/processequipment/heatexchanger/HeatExchanger.java
index ff75159b1..337fb4ec7 100644
--- a/src/main/java/neqsim/processsimulation/processequipment/heatexchanger/HeatExchanger.java
+++ b/src/main/java/neqsim/processsimulation/processequipment/heatexchanger/HeatExchanger.java
@@ -47,6 +47,7 @@ public class HeatExchanger extends Heater implements HeatExchangerInterface {
   public double thermalEffectiveness = 0.0;
   private String flowArrangement = "concentric tube counterflow";
   private boolean useDeltaT = false;
+  private double deltaT = 1.0;
 
   /**
    * Constructor for HeatExchanger.
@@ -64,11 +65,7 @@ public HeatExchanger(String name) {
    * @param inStream1 input stream
    */
   public HeatExchanger(String name, StreamInterface inStream1) {
-    this(name);
-    this.inStream[0] = inStream1;
-    this.inStream[1] = inStream1;
-    outStream[0] = inStream1.clone();
-    outStream[1] = inStream1.clone();
+    this(name, inStream1, inStream1);
   }
 
   /**
@@ -84,23 +81,26 @@ public HeatExchanger(String name, StreamInterface inStream1, StreamInterface inS
     this.inStream[1] = inStream2;
     outStream[0] = inStream1.clone();
     outStream[1] = inStream2.clone();
+    setName(name);
   }
 
   /**
    * <p>
-   * addInStream.
+   * Add inlet stream.
    * </p>
    *
    * @param inStream a {@link neqsim.processsimulation.processequipment.stream.StreamInterface}
    *        object
    */
   public void addInStream(StreamInterface inStream) {
+    // todo: this is probably intended to specifically set the second stream. should be deprecated
+    // and replaced by setFeedStream?
     this.inStream[1] = inStream;
   }
 
   /**
    * <p>
-   * setFeedStream.
+   * setFeedStream. Will also set name of outstreams.
    * </p>
    *
    * @param number a int
@@ -110,6 +110,7 @@ public void addInStream(StreamInterface inStream) {
   public void setFeedStream(int number, StreamInterface inStream) {
     this.inStream[number] = inStream;
     outStream[number] = inStream.clone();
+    setName(getName());
   }
 
   /** {@inheritDoc} */
@@ -152,24 +153,26 @@ public void setOutTemperature(double temperature) {
 
   /**
    * <p>
-   * getOutTemperature.
+   * Get temperature of outstream i.
    * </p>
    *
    * @param i a int
+   * @return a double
    */
-  public void getOutTemperature(int i) {
-    outStream[i].getThermoSystem().getTemperature();
+  public double getOutTemperature(int i) {
+    return outStream[i].getThermoSystem().getTemperature();
   }
 
   /**
    * <p>
-   * getInTemperature.
+   * Get temperature of instream i.
    * </p>
    *
    * @param i a int
+   * @return a double
    */
-  public void getInTemperature(int i) {
-    inStream[i].getThermoSystem().getTemperature();
+  public double getInTemperature(int i) {
+    return inStream[i].getThermoSystem().getTemperature();
   }
 
   /**
@@ -225,13 +228,12 @@ public void runSpecifiedStream(UUID id) {
 
   /**
    * <p>
-   * runSpecifiedStream.
+   * runDeltaT.
    * </p>
    *
    * @param id UUID of run
    */
   public void runDeltaT(UUID id) {
-
     if (getSpecification().equals("out stream")) {
       runSpecifiedStream(id);
     } else if (firstTime) {
@@ -704,7 +706,9 @@ public String toJson() {
   }
 
   /**
-   * <p>Setter for the field <code>useDeltaT</code>.</p>
+   * <p>
+   * Setter for the field <code>useDeltaT</code>.
+   * </p>
    *
    * @param useDeltaT a boolean
    */
@@ -712,10 +716,10 @@ public void setUseDeltaT(boolean useDeltaT) {
     this.useDeltaT = useDeltaT;
   }
 
-  private double deltaT = 1.0;
-
   /**
-   * <p>Getter for the field <code>deltaT</code>.</p>
+   * <p>
+   * Getter for the field <code>deltaT</code>.
+   * </p>
    *
    * @return a double
    */
@@ -724,7 +728,9 @@ public double getDeltaT() {
   }
 
   /**
-   * <p>Setter for the field <code>deltaT</code>.</p>
+   * <p>
+   * Setter for the field <code>deltaT</code>.
+   * </p>
    *
    * @param deltaT a double
    */
diff --git a/src/main/java/neqsim/thermo/system/SystemThermo.java b/src/main/java/neqsim/thermo/system/SystemThermo.java
index c027e921d..7125e89dc 100644
--- a/src/main/java/neqsim/thermo/system/SystemThermo.java
+++ b/src/main/java/neqsim/thermo/system/SystemThermo.java
@@ -915,11 +915,18 @@ public void addTBPfraction(String componentName, double numberOfMoles, double mo
       // //refSystem.initPhysicalProperties();
       // // APIdens - refSystem.getPhase(1).getPhysicalProperties().getDensity();
       // sammenligne med API-standard for tetthet - og sette Penloux dt
+    } catch (RuntimeException ex) {
+      // todo: Should not swallow notimplementedexception
+      /*
+       * if (ex.getCause().getClass().equals(NotImplementedException.class)) { throw ex; }
+       */
+      logger.error(ex.getMessage());
     } catch (Exception ex) {
       logger.error(ex.getMessage(), ex);
     }
 
     double critVol = characterization.getTBPModel().calcCriticalVolume(molarMass * 1000, density);
+
     // 0.2918-0.0928*acs)*ThermodynamicConstantsInterface.R*TC/PC*10.0;
     addComponent(componentName, numberOfMoles, TC, PC, acs);
     double Kwatson = Math.pow(TB * 1.8, 1.0 / 3.0) / density;
diff --git a/src/main/java/neqsim/thermo/util/readwrite/EclipseFluidReadWrite.java b/src/main/java/neqsim/thermo/util/readwrite/EclipseFluidReadWrite.java
index b071fc1fe..28590b559 100644
--- a/src/main/java/neqsim/thermo/util/readwrite/EclipseFluidReadWrite.java
+++ b/src/main/java/neqsim/thermo/util/readwrite/EclipseFluidReadWrite.java
@@ -108,8 +108,10 @@ public static void setComposition(SystemInterface fluid, String inputFile) {
           fluid.addComponent(name + pseudoName, ZI.get(counter));
         }
       }
+    } catch (RuntimeException ex) {
+      logger.error(ex.getMessage());
     } catch (Exception ex) {
-      logger.error(ex.getMessage(), ex);
+      logger.error(ex.getMessage());
     }
   }