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47 :
48 : #ifndef HVACStandAloneERV_hh_INCLUDED
49 : #define HVACStandAloneERV_hh_INCLUDED
50 :
51 : // C++ Headers
52 : #include <unordered_set>
53 :
54 : // ObjexxFCL Headers
55 : #include <ObjexxFCL/Array1D.hh>
56 :
57 : // EnergyPlus Headers
58 : #include <EnergyPlus/Data/BaseData.hh>
59 : #include <EnergyPlus/DataGlobals.hh>
60 : #include <EnergyPlus/EnergyPlus.hh>
61 :
62 : namespace EnergyPlus {
63 :
64 : // Forward declarations
65 : struct EnergyPlusData;
66 :
67 : namespace HVACStandAloneERV {
68 :
69 251 : struct StandAloneERVData
70 : {
71 : // Members
72 : // input data
73 : std::string Name; // name of the stand alone ERV unit
74 : std::string UnitType; // ZoneHVAC:EnergyRecoveryVentilator
75 : int SchedPtr; // pointer to availability schedule
76 : std::string HeatExchangerName; // name of the heat exchanger within the ERV unit
77 : int HeatExchangerIndex; // Pointer to heat exchanger
78 : int HeatExchangerTypeNum; // Parameter equivalent of HX object type
79 : int SupplyAirInletNode; // supply air inlet node for the stand alone ERV
80 : int SupplyAirOutletNode; // supply air outlet node for the stand alone ERV
81 : std::string SupplyAirFanName; // fan name in the supply air stream of the ERV
82 : int SupplyAirFanIndex; // index to supply air fan
83 : int SupplyAirFanSchPtr; // index to supply air fan schedule
84 : int SupplyAirFanType_Num; // parameter equivalent of fan type
85 : int ExhaustAirInletNode; // exhaust air inlet node for the stand alone ERV
86 : int ExhaustAirOutletNode; // exhaust air outlet node for the stand alone ERV
87 : std::string ExhaustAirFanName; // fan name in exhaust air stream of the ERV
88 : int ExhaustAirFanIndex; // index to exhaust air fan
89 : int ExhaustAirFanSchPtr; // index to exhaust air fan schedule
90 : int ExhaustAirFanType_Num; // paramter equivalent of fan type
91 : Real64 SupplyAirVolFlow; // volumetric flow rate through the supply side of the ERV
92 : Real64 ExhaustAirVolFlow; // volumetric flow rate through the exhaust side of the ERV
93 : std::string ControllerName; // name of the controller for the stand alone ERV
94 : bool ControllerNameDefined; // controller for the stand alone ERV is defined
95 : int ControlledZoneNum; // index to controlled zone for stand alone ERV
96 : int ControllerIndex; // Pointer for updates by routines this module calls.
97 : Real64 MaxSupAirMassFlow; // air mass flow rate through the supply side of the ERV
98 : Real64 MaxExhAirMassFlow; // air mass flow rate through the exhaust side of the ERV
99 : Real64 HighRHOAFlowRatio; // ratio of outside air flow to max outside air flow
100 : Real64 DesignSAFanVolFlowRate; // SA fan volumetric flow rate
101 : Real64 DesignEAFanVolFlowRate; // EA fan volumetric flow rate
102 : Real64 DesignHXVolFlowRate; // HX (heat exchanger) volumetric flow rate
103 : Real64 DesignSAFanMassFlowRate; // SA fan mass flow rate
104 : Real64 DesignEAFanMassFlowRate; // EA fan mass flow rate
105 : Real64 AirVolFlowPerFloorArea; // Air flow rate per unit floor area, used for autosizing
106 : Real64 AirVolFlowPerOccupant; // Air flow rate per occupant, used for autosizing
107 : int EconomizerOASchedPtr; // schedule to modify outdoor air
108 : bool FlowError; // used for one-time warning message for flow imbalance (Init)
109 : int AvailStatus;
110 : std::string AvailManagerListName; // Name of an availability manager list object
111 : // report variables
112 : Real64 ElecUseRate; // total electric use rate (power) for supply/exhaust fans & generic HX parasitics [W]
113 : Real64 ElecUseEnergy; // electric energy use for supply fan, exhaust fan, and generic HX parasitics [J]
114 : Real64 SensCoolingEnergy; // sensible cooling energy delivered by the ERV supply air to the zone [J]
115 : Real64 SensCoolingRate; // rate of sensible cooling delivered to the zone [W]
116 : Real64 LatCoolingEnergy; // latent cooling energy delivered by the ERV supply air to the zone [J]
117 : Real64 LatCoolingRate; // rate of latent cooling delivered to the zone [W]
118 : Real64 TotCoolingEnergy; // total cooling energy delivered by the ERV supply air to the zone [J]
119 : Real64 TotCoolingRate; // rate of total cooling delivered to the zone [W]
120 : Real64 SensHeatingEnergy; // sensible heating energy delivered by the ERV supply air to the zone [J]
121 : Real64 SensHeatingRate; // rate of sensible heating delivered to the zone [W]
122 : Real64 LatHeatingEnergy; // latent heating energy delivered by the ERV supply air to the zone [J]
123 : Real64 LatHeatingRate; // rate of latent heating delivered to the zone [W]
124 : Real64 TotHeatingEnergy; // total heating energy delivered by the ERV supply air to the zone [J]
125 : Real64 TotHeatingRate; // rate of total heating delivered to the zone [W]
126 : bool FirstPass; // detects first time through for resetting sizing data
127 :
128 : // Default Constructor
129 112 : StandAloneERVData()
130 112 : : SchedPtr(0), HeatExchangerIndex(0), HeatExchangerTypeNum(0), SupplyAirInletNode(0), SupplyAirOutletNode(0), SupplyAirFanIndex(0),
131 : SupplyAirFanSchPtr(0), SupplyAirFanType_Num(0), ExhaustAirInletNode(0), ExhaustAirOutletNode(0), ExhaustAirFanIndex(0),
132 : ExhaustAirFanSchPtr(0), ExhaustAirFanType_Num(0), SupplyAirVolFlow(0.0), ExhaustAirVolFlow(0.0), ControllerNameDefined(false),
133 : ControlledZoneNum(0), ControllerIndex(0), MaxSupAirMassFlow(0.0), MaxExhAirMassFlow(0.0), HighRHOAFlowRatio(1.0),
134 : DesignSAFanVolFlowRate(0.0), DesignEAFanVolFlowRate(0.0), DesignHXVolFlowRate(0.0), DesignSAFanMassFlowRate(0.0),
135 : DesignEAFanMassFlowRate(0.0), AirVolFlowPerFloorArea(0.0), AirVolFlowPerOccupant(0.0), EconomizerOASchedPtr(0), FlowError(true),
136 : AvailStatus(0), ElecUseRate(0.0), ElecUseEnergy(0.0), SensCoolingEnergy(0.0), SensCoolingRate(0.0), LatCoolingEnergy(0.0),
137 : LatCoolingRate(0.0), TotCoolingEnergy(0.0), TotCoolingRate(0.0), SensHeatingEnergy(0.0), SensHeatingRate(0.0), LatHeatingEnergy(0.0),
138 112 : LatHeatingRate(0.0), TotHeatingEnergy(0.0), TotHeatingRate(0.0), FirstPass(true)
139 : {
140 112 : }
141 : };
142 :
143 : void SimStandAloneERV(EnergyPlusData &state,
144 : std::string_view CompName, // name of the Stand Alone ERV unit
145 : int ZoneNum, // number of zone being served unused1208
146 : bool FirstHVACIteration, // TRUE if 1st HVAC simulation of system timestep
147 : Real64 &SensLoadMet, // net sensible load supplied by the ERV unit to the zone (W)
148 : Real64 &LatLoadMet, // net latent load supplied by ERV unit to the zone (kg/s),
149 : int &CompIndex // pointer to correct component
150 : );
151 :
152 : void GetStandAloneERV(EnergyPlusData &state);
153 :
154 : void InitStandAloneERV(EnergyPlusData &state,
155 : int StandAloneERVNum, // number of the current Stand Alone ERV unit being simulated
156 : int ZoneNum, // number of zone being served unused1208
157 : bool FirstHVACIteration // TRUE if first HVAC iteration
158 : );
159 :
160 : void SizeStandAloneERV(EnergyPlusData &state, int StandAloneERVNum);
161 :
162 : void CalcStandAloneERV(EnergyPlusData &state,
163 : int StandAloneERVNum, // Unit index in ERV data structure
164 : bool FirstHVACIteration, // flag for 1st HVAC iteration in the time step
165 : Real64 &SensLoadMet, // sensible zone load met by unit (W)
166 : Real64 &LatentMassLoadMet // latent zone load met by unit (kg/s), dehumid = negative
167 : );
168 :
169 : void ReportStandAloneERV(EnergyPlusData &state, int StandAloneERVNum); // number of the current Stand Alone ERV being simulated
170 :
171 : // End of Reporting subroutines for the Module
172 :
173 : // Utility subroutines/functions for the HeatingCoil Module
174 :
175 : Real64 GetSupplyAirFlowRate(EnergyPlusData &state,
176 : std::string const &ERVType, // must be "ZoneHVAC:EnergyRecoveryVentilator"
177 : std::string const &ERVCtrlName, // must match a controller name in the ERV data structure
178 : bool &ErrorsFound // set to true if problem
179 : );
180 :
181 : int GetSupplyAirInletNode(EnergyPlusData &state,
182 : std::string const &ERVType, // must be "ZoneHVAC:EnergyRecoveryVentilator"
183 : std::string const &ERVCtrlName, // must match a controller name in the ERV data structure
184 : bool &ErrorsFound // set to true if problem
185 : );
186 :
187 : int GetExhaustAirInletNode(EnergyPlusData &state,
188 : std::string const &ERVType, // must be "ZoneHVAC:EnergyRecoveryVentilator"
189 : std::string const &ERVCtrlName, // must match a controller name in the ERV data structure
190 : bool &ErrorsFound // set to true if problem
191 : );
192 :
193 : int GetStandAloneERVOutAirNode(EnergyPlusData &state, int StandAloneERVNum);
194 :
195 : int GetStandAloneERVZoneInletAirNode(EnergyPlusData &state, int StandAloneERVNum);
196 :
197 : int GetStandAloneERVReturnAirNode(EnergyPlusData &state, int StandAloneERVNum);
198 :
199 : bool GetStandAloneERVNodeNumber(EnergyPlusData &state, int NodeNumber);
200 :
201 : } // namespace HVACStandAloneERV
202 :
203 1542 : struct HVACStandAloneERVData : BaseGlobalStruct
204 : {
205 :
206 : int NumStandAloneERVs = 0;
207 : Array1D_bool MySizeFlag;
208 : Array1D_bool CheckEquipName;
209 : bool GetERVInputFlag = true;
210 : EPVector<HVACStandAloneERV::StandAloneERVData> StandAloneERV;
211 : std::unordered_set<std::string> HeatExchangerUniqueNames;
212 : std::unordered_set<std::string> SupplyAirFanUniqueNames;
213 : std::unordered_set<std::string> ExhaustAirFanUniqueNames;
214 : std::unordered_set<std::string> ControllerUniqueNames;
215 : Array1D_bool MySizeFlag_InitStandAloneERV;
216 : bool MyOneTimeFlag = true;
217 : Array1D_bool MyEnvrnFlag;
218 : Array1D_bool MyZoneEqFlag; // used to set up zone equipment availability managers
219 : bool ZoneEquipmentListChecked = false; // True after the Zone Equipment List has been checked for items
220 :
221 0 : void clear_state() override
222 : {
223 0 : NumStandAloneERVs = 0;
224 0 : GetERVInputFlag = true;
225 0 : MySizeFlag.deallocate();
226 0 : CheckEquipName.deallocate();
227 0 : StandAloneERV.deallocate();
228 0 : HeatExchangerUniqueNames.clear();
229 0 : SupplyAirFanUniqueNames.clear();
230 0 : ExhaustAirFanUniqueNames.clear();
231 0 : ControllerUniqueNames.clear();
232 0 : MySizeFlag_InitStandAloneERV.deallocate();
233 0 : MyOneTimeFlag = true;
234 0 : MyEnvrnFlag.deallocate();
235 0 : MyZoneEqFlag.deallocate();
236 0 : ZoneEquipmentListChecked = false;
237 0 : }
238 : };
239 :
240 : } // namespace EnergyPlus
241 :
242 : #endif
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