Initial upload

idd/Energy+.idd.in

@@ -36447,10 +36447,18 @@ ZoneHVAC:WaterToAirHeatPump,
         \note Constant results in 100% water flow regardless of compressor PLR
         \note Cycling results in water flow that matches compressor PLR
         \note ConstantOnDemand results in 100% water flow whenever the coil is on, but is 0% whenever the coil has no load
-   A20; \field Design Specification ZoneHVAC Sizing Object Name
+   A20, \field Design Specification ZoneHVAC Sizing Object Name
         \note Enter the name of a DesignSpecificationZoneHVACSizing object.
         \type object-list
         \object-list DesignSpecificationZoneHVACSizingName
+   A21, \field Design Specification Multispeed Object Type
+        \type choice
+        \key UnitarySystemPerformance:Multispeed
+        \note Enter the type of performance specification object used to describe the multispeed coil or fan.
+   A22; \field Design Specification Multispeed Object Name
+        \type object-list
+        \object-list UnitarySystemPerformaceNames
+        \note Enter the name of the performance specification object used to describe the multispeed coil or fan.
 
 ZoneHVAC:Dehumidifier:DX,
         \memo This object calculates the performance of zone (room) air dehumidifiers.
@@ -42334,14 +42342,21 @@ ZoneHVAC:TerminalUnit:VariableRefrigerantFlow,
        \default 21.0
        \units C
        \note Supplemental heater will not operate when outdoor temperature exceeds this value.
-  A19; \field Controlling Zone or Thermostat Location
+  A19, \field Controlling Zone or Thermostat Location
        \type object-list
        \object-list ZoneNames
        \note Used only for AirloopHVAC equipment on a main branch and defines zone name where thermostat is located.
        \note Not required for zone equipment. Leave blank if terminal unit is used in AirLoopHVAC:OutdoorAirSystem:EquipmentList.
        \note Required when terminal unit is used on main AirloopHVAC branch and coils are not set point controlled.
        \note When terminal unit is used in air loop and is load controlled, this zone's thermostat will control operation.
-
+  A20, \field Design Specification Multispeed Object Type
+       \type choice
+       \key UnitarySystemPerformance:Multispeed
+       \note Enter the type of performance specification object used to describe the multispeed coil or fan.
+  A21; \field Design Specification Multispeed Object Name
+       \type object-list
+       \object-list UnitarySystemPerformaceNames
+       \note Enter the name of the performance specification object used to describe the multispeed coil or fan.
 
 \group Zone HVAC Radiative/Convective Units
 

src/EnergyPlus/HVACFan.cc

@@ -1186,6 +1186,16 @@ namespace HVACFan {
         }
     }
 
+    int FanSystem::fanNumOfSpeed() const
+    {
+        return m_numSpeeds;
+    }
+
+    Real64 FanSystem::AirMassFlowRateAtSpeed(int const SpeedNum)
+    {
+        return m_massFlowAtSpeed[SpeedNum];
+    }
+
     // void
     // FanSystem::fanIsSecondaryDriver()
     //{

src/EnergyPlus/HVACFan.hh

@@ -112,6 +112,10 @@ namespace HVACFan {
 
         void FanInputsForDesignHeatGain(EnergyPlusData &state, Real64 &deltaP, Real64 &motEff, Real64 &totEff, Real64 &motInAirFrac);
 
+        int fanNumOfSpeed() const;
+
+        Real64 AirMassFlowRateAtSpeed(int const SpeedNum);
+
         // void
         // fanIsSecondaryDriver();
 

src/EnergyPlus/HVACVariableRefrigerantFlow.hh

@@ -61,6 +61,7 @@
 #include <EnergyPlus/PlantComponent.hh>
 #include <EnergyPlus/SingleDuct.hh>
 #include <EnergyPlus/StandardRatings.hh>
+#include <EnergyPlus/UnitarySystem.hh>
 
 namespace EnergyPlus {
 
@@ -754,6 +755,20 @@ namespace HVACVariableRefrigerantFlow {
         int coolCoilAirOutNode = 0;            // cooling coil air outlet node number
         int heatCoilAirInNode = 0;             // heating coil air inlet node number
         int heatCoilAirOutNode = 0;            // heating coil air outlet node number
+        std::string DesignSpecMultispeedHPType; // Multiuple performance object type
+        std::string DesignSpecMultispeedHPName; // Multiuple performance object name
+        int DesignSpecMSHPIndex = -1;           //  Multiuple performance index
+        int NumOfSpeedHeating = 0;              // Number of heating speed
+        int NumOfSpeedCooling = 0;              // Number of cooling speed
+        int HeatSpeedNum = 0;                   // Heating speed number
+        int CoolSpeedNum = 0;                   // Cooling speed number
+        std::vector<Real64> CoolVolumeFlowRate;
+        std::vector<Real64> CoolMassFlowRate;
+        std::vector<Real64> HeatVolumeFlowRate;
+        std::vector<Real64> HeatMassFlowRate;
+        int SpeedNum = 0;
+        Real64 SpeedRatio = 0.0;
+        Real64 CycRatio = 0.0;
 
         // Methods for New VRF Model: Fluid Temperature Control
         //******************************************************************************