APU kerosene requirement fix

systems_design/src/aircraftSystems/conventionalATA49.cpp

@@ -84,9 +84,11 @@ void conventionalATA49::getPower() {
     for (size_t n(0); n < outputs.size(); n++) {
         if (outputs.at(n).type == "Bleed") {
             bleedAirOutput = true;
+            myRuntimeInfo->debug << "Bleed air output detected." << std::endl;
         }
         if (outputs.at(n).type == "ShaftPower") {
             shaftPowerOutput = true;
+            myRuntimeInfo->debug << "Shaft power output detected." << std::endl;
         }
     }
     /* If source provides Bleed Air: */
@@ -122,8 +124,9 @@ void conventionalATA49::getPower() {
     /* Calculate required input (Kerosene)*/
     /*Fuel consumption for design load*/
     double effective_design_power = shaftPower.designPower + bleedAir.designPower * 1005. * 200.;
-    double design_fuel_consumption = getKerosene(effective_design_power / 1000.);
-    myRuntimeInfo->out << "APU fuel consumption with design loads: " << design_fuel_consumption << " kg/s" << std::endl;
+    double design_fuel_consumption = getKerosene(convertUnit(WATT, KILO, WATT, effective_design_power));
+    myRuntimeInfo->debug << "APU fuel consumption with design loads (" << effective_design_power << " W): " << design_fuel_consumption << " kg/h" << std::endl;
+    inputs.at(0).designPower = design_fuel_consumption;
     /* Fuel consumption for mission loads */
     for (size_t n(0); n < data_->mission.Steps.size(); n++) {
         double shaftPower_tmp = 0.;
@@ -136,7 +139,8 @@ void conventionalATA49::getPower() {
             shaftPower_tmp = shaftPower.missionPower.at(n).baseLoad;
         }
         double effectivePower = shaftPower_tmp + bleedPower_tmp;
-        inputs.at(0).missionPower.at(n).baseLoad = getKerosene(effectivePower / 1000.);
+        myRuntimeInfo->debug << "Mission effective power: " << effectivePower;
+        inputs.at(0).missionPower.at(n).baseLoad = getKerosene(convertUnit(WATT, KILO, WATT, effectivePower)) / 3600;//in kg/s
     }
 }
 
@@ -146,7 +150,7 @@ double conventionalATA49::getKerosene(double Power) {
         /* If no power is required, the SFC is 0 */
     } else {
         /* specific fuel consumption in [kg/h] */
-        SFC = -0.31 * log(abs(Power / 1000.)) + 2.24; // DA Steinke S.49 basierend auf LTH Daten
+        SFC = -0.31 * log(abs(Power)) + 2.24; // DA Steinke S.49 basierend auf LTH Daten
     }
     return SFC;
 }

systems_design/src/aircraftSystems/conventionalATA49.h

@@ -69,7 +69,7 @@ class conventionalATA49: public aircraftSystem {
     void getPower();
 
     /** \brief Calculates specific fuel consumption of the APU based on required power
-     * \param Power [W] total power APU has to provide
+     * \param Power [kW] total power APU has to provide
      * \return SFC (double) [kg/kWh] specific fuel consumption 
     */
     double getKerosene(double Power);