LCOV - code coverage report
Current view: top level - EnergyPlus - Fans.hh (source / functions) Coverage Total Hit
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Test Date: 2025-05-22 16:09:37 Functions: 100.0 % 7 7

            Line data    Source code
       1              : // EnergyPlus, Copyright (c) 1996-2025, The Board of Trustees of the University of Illinois,
       2              : // The Regents of the University of California, through Lawrence Berkeley National Laboratory
       3              : // (subject to receipt of any required approvals from the U.S. Dept. of Energy), Oak Ridge
       4              : // National Laboratory, managed by UT-Battelle, Alliance for Sustainable Energy, LLC, and other
       5              : // contributors. All rights reserved.
       6              : //
       7              : // NOTICE: This Software was developed under funding from the U.S. Department of Energy and the
       8              : // U.S. Government consequently retains certain rights. As such, the U.S. Government has been
       9              : // granted for itself and others acting on its behalf a paid-up, nonexclusive, irrevocable,
      10              : // worldwide license in the Software to reproduce, distribute copies to the public, prepare
      11              : // derivative works, and perform publicly and display publicly, and to permit others to do so.
      12              : //
      13              : // Redistribution and use in source and binary forms, with or without modification, are permitted
      14              : // provided that the following conditions are met:
      15              : //
      16              : // (1) Redistributions of source code must retain the above copyright notice, this list of
      17              : //     conditions and the following disclaimer.
      18              : //
      19              : // (2) Redistributions in binary form must reproduce the above copyright notice, this list of
      20              : //     conditions and the following disclaimer in the documentation and/or other materials
      21              : //     provided with the distribution.
      22              : //
      23              : // (3) Neither the name of the University of California, Lawrence Berkeley National Laboratory,
      24              : //     the University of Illinois, U.S. Dept. of Energy nor the names of its contributors may be
      25              : //     used to endorse or promote products derived from this software without specific prior
      26              : //     written permission.
      27              : //
      28              : // (4) Use of EnergyPlus(TM) Name. If Licensee (i) distributes the software in stand-alone form
      29              : //     without changes from the version obtained under this License, or (ii) Licensee makes a
      30              : //     reference solely to the software portion of its product, Licensee must refer to the
      31              : //     software as "EnergyPlus version X" software, where "X" is the version number Licensee
      32              : //     obtained under this License and may not use a different name for the software. Except as
      33              : //     specifically required in this Section (4), Licensee shall not use in a company name, a
      34              : //     product name, in advertising, publicity, or other promotional activities any name, trade
      35              : //     name, trademark, logo, or other designation of "EnergyPlus", "E+", "e+" or confusingly
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      37              : //
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      39              : // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
      40              : // AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
      41              : // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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      43              : // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      44              : // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
      45              : // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
      46              : // POSSIBILITY OF SUCH DAMAGE.
      47              : 
      48              : #ifndef Fans_hh_INCLUDED
      49              : #define Fans_hh_INCLUDED
      50              : 
      51              : // ObjexxFCL Headers
      52              : #include <ObjexxFCL/Array1D.hh>
      53              : #include <ObjexxFCL/Optional.hh>
      54              : 
      55              : // EnergyPlus Headers
      56              : #include <EnergyPlus/Data/BaseData.hh>
      57              : #include <EnergyPlus/DataGlobals.hh>
      58              : #include <EnergyPlus/DataHVACGlobals.hh>
      59              : #include <EnergyPlus/EnergyPlus.hh>
      60              : 
      61              : namespace EnergyPlus {
      62              : 
      63              : // Forward declarations
      64              : struct EnergyPlusData;
      65              : 
      66              : namespace Fans {
      67              : 
      68              :     // Fan Minimum Flow Fraction Input Method
      69              :     enum class MinFlowFracMethod
      70              :     {
      71              :         Invalid = -1,
      72              :         MinFrac,
      73              :         FixedMin,
      74              :         Num
      75              :     };
      76              : 
      77              :     enum class AvailManagerMode
      78              :     {
      79              :         Invalid = -1,
      80              :         Coupled,
      81              :         Decoupled,
      82              :         Num
      83              :     };
      84              : 
      85              :     static constexpr std::array<std::string_view, (int)AvailManagerMode::Num> availManagerModeNamesUC = {"COUPLED", "DECOUPLED"};
      86              : 
      87              :     struct FanBase
      88              :     {
      89          311 :         FanBase()
      90          311 :         {
      91          311 :         }
      92              : 
      93          310 :         virtual ~FanBase() = default;
      94              : 
      95              :         virtual void set_size(EnergyPlusData &state) = 0;
      96              : 
      97              :         virtual void init(EnergyPlusData &state) = 0;
      98              :         virtual void simulate(EnergyPlusData &state,
      99              :                               bool const FirstHVACIteration,
     100              :                               ObjexxFCL::Optional<Real64 const> speedRatio = _,       // Flow fraction in operating mode 1
     101              :                               ObjexxFCL::Optional<Real64 const> pressureRise = _,     // Pressure difference to use for DeltaPress
     102              :                               ObjexxFCL::Optional<Real64 const> flowFraction = _,     // Flow fraction in operating mode 1
     103              :                               ObjexxFCL::Optional<Real64 const> massFlowRate1 = _,    // Mass flow rate in operating mode 1 [kg/s]
     104              :                               ObjexxFCL::Optional<Real64 const> runTimeFraction1 = _, // Run time fraction in operating mode 1
     105              :                               ObjexxFCL::Optional<Real64 const> massFlowRate2 = _,    // Mass flow rate in operating mode 2 [kg/s]
     106              :                               ObjexxFCL::Optional<Real64 const> runTimeFraction2 = _, // Run time fraction in operating mode 2
     107              :                               ObjexxFCL::Optional<Real64 const> pressureRise2 = _     // Pressure difference to use for operating mode 2
     108              :         );
     109              : 
     110              :         virtual void update(EnergyPlusData &state) = 0;
     111              : 
     112              :         virtual void report(EnergyPlusData &state) = 0;
     113              : 
     114              :         virtual Real64 getDesignHeatGain(EnergyPlusData &state, Real64 const FanVolFlow) = 0;
     115              : 
     116              :         virtual void getInputsForDesignHeatGain(EnergyPlusData &state,
     117              :                                                 Real64 &deltaP,
     118              :                                                 Real64 &motEff,
     119              :                                                 Real64 &totEff,
     120              :                                                 Real64 &motInAirFrac,
     121              :                                                 Real64 &fanShaftPow,
     122              :                                                 Real64 &motInPower,
     123              :                                                 bool &fanCompModel) = 0;
     124              :         // Members
     125              :         std::string Name;                            // Name of the fan
     126              :         HVAC::FanType type = HVAC::FanType::Invalid; // DataHVACGlobals fan type
     127              : 
     128              :         bool envrnFlag = true;  // initialize to true
     129              :         bool sizingFlag = true; // initialize to true, set to false after sizing routine
     130              : 
     131              :         std::string endUseSubcategoryName;
     132              : 
     133              :         Sched::Schedule *availSched = nullptr; // Pointer to the availability schedule
     134              :         int inletNodeNum = 0;
     135              :         int outletNodeNum = 0;
     136              :         int airLoopNum = 0;
     137              :         bool airPathFlag = false; // Yes, this fan is a part of airpath
     138              :         bool isAFNFan = false;    // Is fan part of and AirFlowNetwork distribution system
     139              : 
     140              :         Real64 maxAirFlowRate = 0.0; // Max Specified Volume Flow Rate of Fan [m3/sec]
     141              :         Real64 minAirFlowRate = 0.0; // Max Specified Volume Flow Rate of Fan [m3/sec]
     142              :         bool maxAirFlowRateIsAutosized = false;
     143              : 
     144              :         Real64 deltaPress = 0.0; // Delta Pressure Across the Fan [N/m2]
     145              :         Real64 deltaTemp = 0.0;  // Temp Rise across the Fan [C]
     146              : 
     147              :         Real64 totalEff = 0.0; // Fan total system efficiency (fan*belt*motor*VFD)
     148              : 
     149              :         Real64 motorEff = 0.0;       // Fan motor efficiency
     150              :         Real64 motorInAirFrac = 0.0; // Fraction of motor heat entering air stream
     151              : 
     152              :         // report variables
     153              :         Real64 totalPower = 0.0;  // Power of the Fan being Simulated [W]
     154              :         Real64 totalEnergy = 0.0; // Fan energy in [J]
     155              :                                   //    Real64 fanRuntimeFraction; // Fraction of the timestep that the fan operates
     156              : 
     157              :         Real64 powerLossToAir = 0.0; // fan heat gain into process air [W]
     158              : 
     159              :         Real64 inletAirMassFlowRate = 0.0; // MassFlow through the Fan being Simulated [kg/Sec]
     160              :         Real64 outletAirMassFlowRate = 0.0;
     161              : 
     162              :         Real64 maxAirMassFlowRate = 0.0; // Max flow rate of fan in kg/sec
     163              :                                          //    Real64 m_minAirMassFlowRate; // Min flow rate of fan in kg/sec
     164              :                                          //    int fanMinAirFracMethod; // parameter for what method is used for min flow fraction
     165              :                                          //    Real64 fanFixedMin; // Absolute minimum fan air flow [m3/s]
     166              :         Real64 minAirMassFlowRate = 0.0; // Min flow rate of fan in kg/sec
     167              : 
     168              :         // Mass Flow Rate Control Variables
     169              :         Real64 massFlowRateMaxAvail = 0.0;
     170              :         Real64 massFlowRateMinAvail = 0.0;
     171              :         Real64 rhoAirStdInit = 0.0;
     172              : 
     173              :         Real64 inletAirTemp = 0.0;
     174              :         Real64 outletAirTemp = 0.0;
     175              :         Real64 inletAirHumRat = 0.0;
     176              :         Real64 outletAirHumRat = 0.0;
     177              :         Real64 inletAirEnthalpy = 0.0;
     178              :         Real64 outletAirEnthalpy = 0.0;
     179              : 
     180              :         // Faults
     181              :         bool faultyFilterFlag = false; // Indicate whether there is a fouling air filter corresponding to the fan
     182              :         int faultyFilterIndex = 0;     // Index of the fouling air filter corresponding to the fan
     183              : 
     184              :         // EMS
     185              :         bool EMSMaxAirFlowRateOverrideOn = false; // if true, EMS wants to override fan size for Max Volume Flow Rate
     186              :         Real64 EMSMaxAirFlowRateValue = 0.0;      // EMS value to use for override of  Max Volume Flow Rate
     187              :         bool EMSMaxMassFlowOverrideOn = false;    // if true, then EMS is calling to override mass flow
     188              :         Real64 EMSAirMassFlowValue = 0.0;         // value EMS is directing to use [kg/s]
     189              :         bool EMSPressureOverrideOn = false;       // if true, then EMS is calling to override
     190              :         Real64 EMSPressureValue = 0.0;            // EMS value for Delta Pressure Across the Fan [Pa]
     191              :         bool EMSTotalEffOverrideOn = false;       // if true, then EMS is calling to override
     192              :         Real64 EMSTotalEffValue = 0.0;            // EMS value for total efficiency of the Fan, fraction on 0..1
     193              : 
     194              :         std::string sizingPrefix;
     195              :     };
     196              : 
     197              :     enum class VFDEffType
     198              :     {
     199              :         Invalid = -1,
     200              :         Speed,
     201              :         Power,
     202              :         Num
     203              :     };
     204              : 
     205              :     static constexpr std::array<std::string_view, (int)VFDEffType::Num> vfdEffTypeNamesUC = {"SPEED", "POWER"};
     206              : 
     207              :     struct FanComponent : public FanBase
     208              :     {
     209              :         void set_size(EnergyPlusData &state);
     210              : 
     211              :         void init(EnergyPlusData &state);
     212              : 
     213              :         Real64 getDesignHeatGain(EnergyPlusData &state, Real64 const FanVolFlow);
     214              : 
     215              :         void getInputsForDesignHeatGain(EnergyPlusData &state,
     216              :                                         Real64 &deltaP,
     217              :                                         Real64 &motEff,
     218              :                                         Real64 &totEff,
     219              :                                         Real64 &motInAirFrac,
     220              :                                         Real64 &fanShaftPow,
     221              :                                         Real64 &motInPower,
     222              :                                         bool &fanCompModel);
     223              : 
     224              :         void update(EnergyPlusData &state);
     225              : 
     226              :         void report(EnergyPlusData &state);
     227              : 
     228              :         void simulateConstant(EnergyPlusData &state);
     229              : 
     230              :         void simulateVAV(EnergyPlusData &state, ObjexxFCL::Optional<Real64 const> PressureRise = _);
     231              : 
     232              :         void simulateOnOff(EnergyPlusData &state, ObjexxFCL::Optional<Real64 const> SpeedRatio = _);
     233              : 
     234              :         void simulateZoneExhaust(EnergyPlusData &state);
     235              : 
     236              :         void simulateComponentModel(EnergyPlusData &state);
     237              : 
     238              :         Real64 runtimeFrac = 0.0;
     239              : 
     240              :         MinFlowFracMethod minAirFracMethod = MinFlowFracMethod::MinFrac; // parameter for what method is used for min flow fraction
     241              : 
     242              :         Real64 minFrac = 0.0;                                  // Minimum fan air flow fraction
     243              :         Real64 fixedMin = 0.0;                                 // Absolute minimum fan air flow [m3/s]
     244              :         std::array<Real64, 5> coeffs{0.0, 0.0, 0.0, 0.0, 0.0}; // Fan Part Load Coefficients to match fan type
     245              :         // Mass Flow Rate Control Variables
     246              : 
     247              :         int nightVentPerfNum = 0;
     248              :         int powerRatioAtSpeedRatioCurveNum = 0;
     249              :         int effRatioCurveNum = 0;
     250              :         bool oneTimePowerRatioCheck = true;          // one time flag used for error message
     251              :         bool oneTimeEffRatioCheck = true;            // one time flag used for error message
     252              :         Real64 wheelDia = 0.0;                       // Fan wheel outer diameter [m]
     253              :         Real64 outletArea = 0.0;                     // Fan outlet area [m2]
     254              :         Real64 maxEff = 0.0;                         // Fan maximum static efficiency [-]
     255              :         Real64 eulerMaxEff = 0.0;                    // Euler number at fan maximum static efficiency [-]
     256              :         Real64 maxDimFlow = 0.0;                     // Fan maximum dimensionless airflow [-]
     257              :         Real64 shaftPowerMax = 0.0;                  // Fan shaft maximum input power [W]
     258              :         Real64 sizingFactor = 0.0;                   // Fan sizing factor [-]
     259              :         Real64 pulleyDiaRatio = 0.0;                 // Motor/fan pulley diameter ratio [-]
     260              :         Real64 beltMaxTorque = 0.0;                  // Belt maximum torque [N-m]
     261              :         Real64 beltSizingFactor = 0.0;               // Belt sizing factor [-]
     262              :         Real64 beltTorqueTrans = 0.0;                // Belt fractional torque transition Region 1-2 [-]
     263              :         Real64 motorMaxSpeed = 0.0;                  // Motor maximum speed [rpm]
     264              :         Real64 motorMaxOutPower = 0.0;               // Motor maximum output power [W]
     265              :         Real64 motorSizingFactor = 0.0;              // Motor sizing factor [-]
     266              :         VFDEffType vfdEffType = VFDEffType::Invalid; // VFD efficiency type [Speed or Power]
     267              :         Real64 vfdMaxOutPower = 0.0;                 // VFD maximum output power [W]
     268              :         Real64 vfdSizingFactor = 0.0;                // VFD sizing factor [-]
     269              :         int pressRiseCurveNum = 0;                   // Fan pressure rise curve index
     270              :         int pressResetCurveNum = 0;                  // Duct static pressure reset curve index
     271              :         int plTotalEffNormCurveNum = 0;              // Fan part-load efficiency (normal) curve index
     272              :         int plTotalEffStallCurveNum = 0;             // Fan part-load efficiency (stall) curve index
     273              :         int dimFlowNormCurveNum = 0;                 // Fan dimensionless airflow (normal) curve index
     274              :         int dimFlowStallCurveNum = 0;                // Fan dimensionless airflow (stall) curve index
     275              :         int beltMaxEffCurveNum = 0;                  // Belt maximum efficiency curve index
     276              :         int plBeltEffReg1CurveNum = 0;               // Belt part-load efficiency (Region 1) curve index
     277              :         int plBeltEffReg2CurveNum = 0;               // Belt part-load efficiency (Region 2) curve index
     278              :         int plBeltEffReg3CurveNum = 0;               // Belt part-load efficiency (Region 3) curve index
     279              :         int motorMaxEffCurveNum = 0;                 // Motor maximum efficiency curve index
     280              :         int plMotorEffCurveNum = 0;                  // Motor part-load efficiency curve index
     281              :         int vfdEffCurveNum = 0;                      // VFD efficiency curve index
     282              :         Real64 deltaPressTot = 0.0;                  // Total pressure rise across fan [N/m2]
     283              :         Real64 airPower = 0.0;                       // Air power for fan being Simulated [W]
     284              :         Real64 fanSpeed = 0.0;                       // Fan shaft rotational speed [rpm]
     285              :         Real64 fanTorque = 0.0;                      // Fan shaft torque [N-m]
     286              :         Real64 wheelEff = 0.0;                       // Fan efficiency (mechanical)
     287              :         Real64 shaftPower = 0.0;                     // Shaft input power for fan being Simulated [W]
     288              :         Real64 beltMaxEff = 0.0;                     // Belt maximum efficiency (mechanical)
     289              :         Real64 beltEff = 0.0;                        // Belt efficiency (mechanical)
     290              :         Real64 beltInputPower = 0.0;                 // Belt input power for fan being Simulated [W]
     291              :         Real64 motorMaxEff = 0.0;                    // Motor maximum efficiency (electrical)
     292              :         Real64 motorInputPower = 0.0;                // Motor input power for fan being Simulated [W]
     293              :         Real64 vfdEff = 0.0;                         // VFD efficiency (electrical)
     294              :         Real64 vfdInputPower = 0.0;                  // VFD input power for fan being Simulated [W]
     295              :         // zone exhaust fan
     296              :         Sched::Schedule *flowFracSched = nullptr;                      // schedule index flow rate modifier schedule
     297              :         AvailManagerMode availManagerMode = AvailManagerMode::Invalid; // mode for how exhaust fan should react to availability managers
     298              :         Sched::Schedule *minTempLimitSched = nullptr;                  // schedule index minimum temperature limit
     299              :         Sched::Schedule *balancedFractSched = nullptr;                 // schedule index portion recirculated
     300              :         Real64 unbalancedOutletMassFlowRate = 0.0;
     301              :         Real64 balancedOutletMassFlowRate = 0.0;
     302              :         Real64 designPointFEI = 0.0; // Fan Energy Index for the fan at the design operating point
     303              :     };
     304              : 
     305              :     struct NightVentPerfData
     306              :     {
     307              :         // Members
     308              :         std::string FanName;             // Name of the fan that will use this data
     309              :         Real64 FanEff = 0.0;             // Fan total efficiency; motor and mechanical
     310              :         Real64 DeltaPress = 0.0;         // Delta Pressure Across the Fan [N/m2]
     311              :         Real64 MaxAirFlowRate = 0.0;     // Max Specified Volume Flow Rate of Fan [m3/s]
     312              :         Real64 MaxAirMassFlowRate = 0.0; // Max flow rate of fan in kg/sec
     313              :         Real64 MotEff = 0.0;             // Fan motor efficiency
     314              :         Real64 MotInAirFrac = 0.0;       // Fraction of motor heat entering air stream
     315              :     };
     316              : 
     317              :     void GetFanInput(EnergyPlusData &state);
     318              : 
     319              :     int GetFanIndex(EnergyPlusData &state, std::string const &FanName);
     320              : 
     321              :     Real64 CalFaultyFanAirFlowReduction(EnergyPlusData &state,
     322              :                                         std::string const &FanName,    // Name of the Fan
     323              :                                         Real64 FanDesignAirFlowRate,   // Fan Design Volume Flow Rate [m3/s]
     324              :                                         Real64 FanDesignDeltaPress,    // Fan Design Delta Pressure [Pa]
     325              :                                         Real64 FanFaultyDeltaPressInc, // Increase of Fan Delta Pressure in the Faulty Case [Pa]
     326              :                                         int FanCurvePtr                // Fan Curve Pointer
     327              :     );
     328              : 
     329              :     enum class PowerSizing
     330              :     {
     331              :         Invalid = -1,
     332              :         PerFlow,
     333              :         PerFlowPerPressure,
     334              :         TotalEfficiencyAndPressure,
     335              :         Num
     336              :     };
     337              : 
     338              :     static constexpr std::array<std::string_view, (int)PowerSizing::Num> powerSizingNamesUC = {
     339              :         "POWERPERFLOW", "POWERPERFLOWPERPRESSURE", "TOTALEFFICIENCYANDPRESSURE"};
     340              : 
     341              :     enum class HeatLossDest
     342              :     {
     343              :         Invalid = -1,
     344              :         Zone,
     345              :         Outside,
     346              :         Num
     347              :     };
     348              : 
     349              :     enum class SpeedControl : int
     350              :     {
     351              :         // TODO: enum check
     352              :         Invalid = -1,
     353              :         Discrete,
     354              :         Continuous,
     355              :         Num
     356              :     };
     357              : 
     358              :     static constexpr std::array<std::string_view, (int)SpeedControl::Num> speedControlNamesUC = {"DISCRETE", "CONTINUOUS"};
     359              : 
     360              :     class FanSystem : public FanBase
     361              :     {
     362              :     public: // Methods
     363           80 :         FanSystem()
     364           80 :         {
     365           80 :         }
     366              :         // Destructor
     367          160 :         ~FanSystem()
     368           80 :         {
     369          160 :         }
     370              : 
     371              :         // Copy Constructor
     372              :         FanSystem(FanSystem const &) = default;
     373              : 
     374              :         Real64 getDesignTemperatureRise(EnergyPlusData &state) const;
     375              : 
     376              :         Real64 getDesignHeatGain(EnergyPlusData &state, Real64 const FanVolFlow);
     377              : 
     378              :         void getInputsForDesignHeatGain(EnergyPlusData &state,
     379              :                                         Real64 &deltaP,
     380              :                                         Real64 &motEff,
     381              :                                         Real64 &totEff,
     382              :                                         Real64 &motInAirFrac,
     383              :                                         Real64 &fanShaftPow,
     384              :                                         Real64 &motInPower,
     385              :                                         bool &fanCompModel);
     386              : 
     387              :         SpeedControl speedControl = SpeedControl::Invalid; // Discrete or Continuous speed control method
     388              :         Real64 designElecPower = 0.0;                      // design electric power consumption [W]
     389              :         int powerModFuncFlowFracCurveNum = 0;              // pointer to performance curve or table
     390              :         int numSpeeds = 0;                                 // input for how many speed levels for discrete fan
     391              :         std::vector<Real64> massFlowAtSpeed;
     392              :         std::vector<Real64> flowFracAtSpeed; // array of flow fractions for speed levels
     393              : 
     394              :         // Mass Flow Rate Control Variables
     395              :         bool isSecondaryDriver = false; // true if this fan is used to augment flow and may pass air when off.
     396              : 
     397              :         // FEI
     398              :         static Real64 report_fei(EnergyPlusData &state, Real64 const designFlowRate, Real64 const designElecPower, Real64 const designDeltaPress);
     399              : 
     400              :         void init(EnergyPlusData &state);
     401              : 
     402              :         void set_size(EnergyPlusData &state);
     403              : 
     404              :         void
     405              :         calcSimpleSystemFan(EnergyPlusData &state,
     406              :                             ObjexxFCL::Optional<Real64 const> flowFraction, // Flow fraction for entire timestep (not used if flow ratios are present)
     407              :                             ObjexxFCL::Optional<Real64 const> pressureRise, // Pressure difference to use for DeltaPress
     408              :                             ObjexxFCL::Optional<Real64 const> flowRatio1,   // Flow ratio in operating mode 1
     409              :                             ObjexxFCL::Optional<Real64 const> runTimeFrac1, // Run time fraction in operating mode 1
     410              :                             ObjexxFCL::Optional<Real64 const> flowRatio2,   // Flow ratio in operating mode 2
     411              :                             ObjexxFCL::Optional<Real64 const> runTimeFrac2, // Run time fraction in operating mode 2
     412              :                             ObjexxFCL::Optional<Real64 const> pressureRise2 // Pressure difference to use for operating mode 2
     413              :         );
     414              : 
     415              :         void update(EnergyPlusData &state);
     416              : 
     417              :         void report(EnergyPlusData &state);
     418              : 
     419              :     public:
     420              :         // data
     421              :         Real64 minPowerFlowFrac = 0.0; // Minimum fan air flow fraction for power calculation
     422              :         bool designElecPowerWasAutosized = false;
     423              :         PowerSizing powerSizingMethod = PowerSizing::Invalid; // sizing method for design electric power, three options
     424              :         Real64 elecPowerPerFlowRate = 0.0;                    // scaling factor for PowerPerFlow method
     425              :         Real64 elecPowerPerFlowRatePerPressure = 0.0;         // scaling factor for PowerPerFlowPerPressure
     426              :         Real64 nightVentPressureDelta = 0.0;                  // fan pressure rise during night ventilation mode
     427              :         Real64 nightVentFlowFraction = 0.0;                   // fan's flow fraction during night ventilation mode, not used
     428              :         int zoneNum = 0;                                      // zone index for motor heat losses as internal gains
     429              :         Real64 zoneRadFract = 0.0;                            // thermal radiation split for motor losses
     430              :         HeatLossDest heatLossDest = HeatLossDest::Invalid;    // enum for where motor loss go
     431              :         Real64 qdotConvZone = 0.0;                            // fan power lost to surrounding zone by convection to air (W)
     432              :         Real64 qdotRadZone = 0.0;                             // fan power lost to surrounding zone by radiation to zone surfaces(W)
     433              :         std::vector<Real64> powerFracAtSpeed;                 // array of power fractions for speed levels
     434              :         std::vector<bool> powerFracInputAtSpeed;
     435              :         // calculation variables
     436              :         std::vector<Real64> totalEffAtSpeed;
     437              :         std::vector<Real64> runtimeFracAtSpeed;
     438              : 
     439              :         Real64 designPointFEI = 0.0; // Fan Energy Index for the fan at the design operating point
     440              : 
     441              :     }; // class FanSystem
     442              : 
     443              : } // namespace Fans
     444              : 
     445              : struct FansData : BaseGlobalStruct
     446              : {
     447              :     int NumNightVentPerf = 0;    // number of FAN:NIGHT VENT PERFORMANCE objects found in the input
     448              :     bool GetFanInputFlag = true; // Flag set to make sure you get input once
     449              :     bool MyOneTimeFlag = true;
     450              :     bool ZoneEquipmentListChecked = false;
     451              : 
     452              :     Array1D<Fans::NightVentPerfData> NightVentPerf;
     453              :     int ErrCount = 0;
     454              : 
     455              :     Array1D<Fans::FanBase *> fans;
     456              :     std::map<std::string, int> fanMap;
     457              : 
     458         2126 :     void init_constant_state([[maybe_unused]] EnergyPlusData &state) override
     459              :     {
     460         2126 :     }
     461              : 
     462         1152 :     void init_state([[maybe_unused]] EnergyPlusData &state) override
     463              :     {
     464         1152 :     }
     465              : 
     466         2100 :     void clear_state() override
     467              :     {
     468         2410 :         for (int i = 1; i <= (int)fans.size(); ++i)
     469          310 :             delete fans(i);
     470              : 
     471         2100 :         fans.clear();
     472         2100 :         fanMap.clear();
     473              : 
     474         2100 :         new (this) FansData();
     475         2100 :     }
     476              : };
     477              : 
     478              : } // namespace EnergyPlus
     479              : 
     480              : #endif
        

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