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1 : // EnergyPlus, Copyright (c) 1996-2025, The Board of Trustees of the University of Illinois,
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47 :
48 : #ifndef SteamBaseboardRadiator_hh_INCLUDED
49 : #define SteamBaseboardRadiator_hh_INCLUDED
50 :
51 : // ObjexxFCL Headers
52 : #include <ObjexxFCL/Array1D.hh>
53 :
54 : // EnergyPlus Headers
55 : #include <EnergyPlus/Data/BaseData.hh>
56 : #include <EnergyPlus/DataGlobals.hh>
57 : #include <EnergyPlus/EnergyPlus.hh>
58 : #include <EnergyPlus/FluidProperties.hh>
59 :
60 : namespace EnergyPlus {
61 :
62 : // Forward declarations
63 : struct EnergyPlusData;
64 :
65 : namespace SteamBaseboardRadiator {
66 :
67 : struct SteamBaseboardParams
68 : {
69 : // Members
70 : std::string Name;
71 : DataPlant::PlantEquipmentType EquipType;
72 : std::string designObjectName; // Design Object
73 : int DesignObjectPtr;
74 : Array1D_string SurfaceName;
75 : Array1D_int SurfacePtr;
76 : int ZonePtr;
77 : Sched::Schedule *availSched = nullptr;
78 : int SteamInletNode; // Inlet steam baseboard node
79 : int SteamOutletNode; // Outlet steam baseboard node
80 : int TotSurfToDistrib; // Total numbers of the surfaces that the radiant heat gets distributed
81 : Fluid::RefrigProps *steam = nullptr;
82 : int ControlCompTypeNum;
83 : int CompErrIndex;
84 : Real64 DegOfSubcooling; // Temperature differences due to subcooling of the condensate [C]
85 : Real64 SteamMassFlowRate; // Mass flow rate of steam passing through the heater [kg/s]
86 : Real64 SteamMassFlowRateMax; // Maximum mass flow rate of steam [kg/s]
87 : Real64 SteamVolFlowRateMax; // Maximum volumetric flow rate of steam [m3/s]
88 : Real64 SteamOutletTemp; // Outlet steam temperature from the heater [C]
89 : Real64 SteamInletTemp; // Inlet steam temperature [C]
90 : Real64 SteamInletEnthalpy; // Enthalpy of the steam delivered from the boiler [J/kg]
91 : Real64 SteamOutletEnthalpy; // Enthalpy of the steam leaving the heater [J/kg]
92 : Real64 SteamInletPress; // Pressure of steam at the inlet of the heater [Pa]
93 : Real64 SteamOutletPress; // Pressure of steam at the outlet of the heater [Pa]
94 : Real64 SteamInletQuality; // Quality of steam at the inlet of the heater [Pa]
95 : Real64 SteamOutletQuality; // Quality of steam at the outlet of the heater [Pa]
96 : Real64 FracRadiant; // User defined fraction for radiant heat addition
97 : Real64 FracConvect; // Fraction for convective heat addition
98 : Real64 FracDistribPerson; // Fraction for radiant heat incident on people
99 : Array1D<Real64> FracDistribToSurf;
100 : Real64 TotPower; // Convective system impact rate that the heater actually meets [W]
101 : Real64 Power; // Maximum heating rate [W]
102 : Real64 ConvPower; // Convective heating rate [W]
103 : Real64 RadPower; // Radiant heating rate [W]
104 : Real64 TotEnergy; // Convective system impact energy [J]
105 : Real64 Energy; // Maximum heating energy [J]
106 : Real64 ConvEnergy; // Convective heating energy [J]
107 : Real64 RadEnergy; // Radiant heating energy [J]
108 : PlantLocation plantLoc;
109 : int BBLoadReSimIndex;
110 : int BBMassFlowReSimIndex;
111 : int BBInletTempFlowReSimIndex;
112 : Real64 QBBSteamRadSource; // Need to keep the last value in case we are still iterating
113 : Real64 QBBSteamRadSrcAvg; // Need to keep the last value in case we are still iterating
114 : Real64 ZeroBBSteamSourceSumHATsurf; // Equal to the SumHATsurf for all the walls in a zone
115 : // with no source
116 :
117 : // Record keeping variables used to calculate QBBRadSrcAvg locally
118 : Real64 LastQBBSteamRadSrc; // Need to keep the last value in case we are still iterating
119 : Real64 LastSysTimeElapsed; // Need to keep the last value in case we are still iterating
120 : Real64 LastTimeStepSys; // Need to keep the last value in case we are still iterating
121 :
122 : Real64 ScaledHeatingCapacity; // - steam baseboard Radiator system scaled maximum heating capacity {W} or scalable variable of zone HVAC
123 : // equipment, {-}, or {W/m2}
124 :
125 : // Default Constructor
126 0 : SteamBaseboardParams()
127 0 : : EquipType(DataPlant::PlantEquipmentType::Invalid), DesignObjectPtr(0), ZonePtr(0), SteamInletNode(0), SteamOutletNode(0),
128 0 : TotSurfToDistrib(0), ControlCompTypeNum(0), CompErrIndex(0), DegOfSubcooling(0.0), SteamMassFlowRate(0.0), SteamMassFlowRateMax(0.0),
129 0 : SteamVolFlowRateMax(0.0), SteamOutletTemp(0.0), SteamInletTemp(0.0), SteamInletEnthalpy(0.0), SteamOutletEnthalpy(0.0),
130 0 : SteamInletPress(0.0), SteamOutletPress(0.0), SteamInletQuality(0.0), SteamOutletQuality(0.0), FracRadiant(0.0), FracConvect(0.0),
131 0 : FracDistribPerson(0.0), TotPower(0.0), Power(0.0), ConvPower(0.0), RadPower(0.0), TotEnergy(0.0), Energy(0.0), ConvEnergy(0.0),
132 0 : RadEnergy(0.0), plantLoc{}, BBLoadReSimIndex(0), BBMassFlowReSimIndex(0), BBInletTempFlowReSimIndex(0), QBBSteamRadSource(0.0),
133 0 : QBBSteamRadSrcAvg(0.0), ZeroBBSteamSourceSumHATsurf(0.0), LastQBBSteamRadSrc(0.0), LastSysTimeElapsed(0.0), LastTimeStepSys(0.0),
134 0 : ScaledHeatingCapacity(0.0)
135 : {
136 0 : }
137 : };
138 :
139 : struct SteamBaseboardDesignData : SteamBaseboardParams
140 : {
141 : // Members
142 : std::string designName;
143 : int HeatingCapMethod; // - Method for heating capacity scaledsizing calculation (HeatingDesignCapacity, CapacityPerFloorArea,
144 : // FracOfAutosizedHeatingCapacity)
145 : Real64 DesignScaledHeatingCapacity; // - scaled maximum heating capacity {W} or scalable variable of zone HVAC equipment, {-}, or {W/m2}
146 : Real64 Offset;
147 : Real64 FracRadiant;
148 : Real64 FracDistribPerson;
149 :
150 : // Default Constructor
151 0 : SteamBaseboardDesignData() : HeatingCapMethod(0), DesignScaledHeatingCapacity(0.0), Offset(0.0), FracRadiant(0.0), FracDistribPerson(0.0)
152 : {
153 0 : }
154 : };
155 :
156 : struct SteamBaseboardNumericFieldData
157 : {
158 : // Members
159 : Array1D_string FieldNames;
160 :
161 : // Default Constructor
162 0 : SteamBaseboardNumericFieldData()
163 0 : {
164 0 : }
165 : };
166 :
167 : struct SteamBaseboardDesignNumericFieldData
168 : {
169 : // Members
170 : Array1D_string FieldNames;
171 :
172 : // Default Constructor
173 0 : SteamBaseboardDesignNumericFieldData()
174 0 : {
175 0 : }
176 : };
177 :
178 : void SimSteamBaseboard(EnergyPlusData &state,
179 : std::string const &EquipName,
180 : int const ControlledZoneNum,
181 : bool const FirstHVACIteration,
182 : Real64 &PowerMet,
183 : int &CompIndex);
184 :
185 : void GetSteamBaseboardInput(EnergyPlusData &state);
186 :
187 : void InitSteamBaseboard(EnergyPlusData &state, int const BaseboardNum, int const ControlledZoneNum, bool const FirstHVACIteration);
188 :
189 : void SizeSteamBaseboard(EnergyPlusData &state, int const BaseboardNum);
190 :
191 : void CalcSteamBaseboard(EnergyPlusData &state, int &BaseboardNum, Real64 &LoadMet);
192 :
193 : void UpdateSteamBaseboard(EnergyPlusData &state, int const BaseboardNum);
194 :
195 : void UpdateBBSteamRadSourceValAvg(EnergyPlusData &state, bool &SteamBaseboardSysOn); // .TRUE. if the radiant system has run this zone time step
196 :
197 : void DistributeBBSteamRadGains(EnergyPlusData &state);
198 :
199 : void ReportSteamBaseboard(EnergyPlusData &state, int const BaseboardNum);
200 :
201 : void UpdateSteamBaseboardPlantConnection(EnergyPlusData &state,
202 : DataPlant::PlantEquipmentType BaseboardType, // type index
203 : std::string const &BaseboardName, // component name
204 : int const EquipFlowCtrl, // Flow control mode for the equipment
205 : int const LoopNum, // Plant loop index for where called from
206 : const DataPlant::LoopSideLocation LoopSide, // Plant loop side index for where called from
207 : int &CompIndex, // Chiller number pointer
208 : bool const FirstHVACIteration,
209 : bool const InitLoopEquip // If not zero, calculate the max load for operating conditions
210 : );
211 :
212 : } // namespace SteamBaseboardRadiator
213 :
214 : struct SteamBaseboardRadiatorData : BaseGlobalStruct
215 : {
216 :
217 : std::string const cCMO_BBRadiator_Steam = "ZoneHVAC:Baseboard:RadiantConvective:Steam";
218 : std::string const cCMO_BBRadiator_Steam_Design = "ZoneHVAC:Baseboard:RadiantConvective:Steam:Design";
219 : int NumSteamBaseboards = 0;
220 : int NumSteamBaseboardsDesign = 0;
221 :
222 : Array1D_bool MySizeFlag;
223 : Array1D_bool CheckEquipName;
224 : Array1D_bool CheckDesignObjectName;
225 : Array1D_bool SetLoopIndexFlag; // get loop number flag
226 :
227 : bool GetInputFlag = true; // one time get input flag
228 : bool MyOneTimeFlag = true;
229 : bool ZoneEquipmentListChecked = false;
230 : Array1D_bool MyEnvrnFlag;
231 :
232 : Array1D<SteamBaseboardRadiator::SteamBaseboardParams> SteamBaseboard;
233 : Array1D<SteamBaseboardRadiator::SteamBaseboardDesignData> SteamBaseboardDesign;
234 : Array1D<SteamBaseboardRadiator::SteamBaseboardNumericFieldData> SteamBaseboardNumericFields;
235 : Array1D<SteamBaseboardRadiator::SteamBaseboardDesignNumericFieldData> SteamBaseboardDesignNumericFields;
236 : Array1D_string SteamBaseboardDesignNames; // Array that contains the names of Design objects
237 :
238 2126 : void init_constant_state([[maybe_unused]] EnergyPlusData &state) override
239 : {
240 2126 : }
241 :
242 1152 : void init_state([[maybe_unused]] EnergyPlusData &state) override
243 : {
244 1152 : }
245 :
246 2100 : void clear_state() override
247 : {
248 2100 : NumSteamBaseboards = 0;
249 2100 : MySizeFlag.clear();
250 2100 : MyEnvrnFlag.clear();
251 2100 : CheckEquipName.clear();
252 2100 : SetLoopIndexFlag.clear();
253 2100 : GetInputFlag = true;
254 2100 : MyOneTimeFlag = true;
255 2100 : ZoneEquipmentListChecked = false;
256 2100 : SteamBaseboard.clear();
257 2100 : SteamBaseboardNumericFields.clear();
258 2100 : SteamBaseboardDesignNames.clear();
259 2100 : }
260 :
261 : // Default Constructor
262 10645 : SteamBaseboardRadiatorData() = default;
263 : };
264 : } // namespace EnergyPlus
265 :
266 : #endif
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