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47 :
48 : #ifndef ChillerIndirectAbsorption_hh_INCLUDED
49 : #define ChillerIndirectAbsorption_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 : #include <EnergyPlus/Plant/DataPlant.hh>
60 : #include <EnergyPlus/PlantComponent.hh>
61 :
62 : namespace EnergyPlus {
63 :
64 : // Forward declarations
65 : struct EnergyPlusData;
66 :
67 : namespace ChillerIndirectAbsorption {
68 :
69 : struct ReportVars
70 : {
71 : // Members
72 : Real64 PumpingPower = 0.0; // reporting: W - electric pumping power
73 : Real64 QGenerator = 0.0; // reporting: W - steam heat transfer rate
74 : Real64 QEvap = 0.0; // reporting: W - evaporator heat transfer rate
75 : Real64 QCond = 0.0; // reporting: W - condenser heat transfer rate
76 : Real64 PumpingEnergy = 0.0; // reporting: J - electric pumping power
77 : Real64 GeneratorEnergy = 0.0; // reporting: J - steam heat transfer rate
78 : Real64 EvapEnergy = 0.0; // reporting: J - evaporator heat transfer rate
79 : Real64 CondEnergy = 0.0; // reporting: J - condenser heat transfer rate
80 : Real64 CondInletTemp = 0.0; // reporting: C - condenser inlet temperature
81 : Real64 EvapInletTemp = 0.0; // reporting: C - evaporator inlet temperature
82 : Real64 CondOutletTemp = 0.0; // reporting: C - condenser outlet temperature
83 : Real64 EvapOutletTemp = 0.0; // reporting: C - evaporator outlet temperature
84 : Real64 Evapmdot = 0.0; // reporting: kg/ - evaporator mass flow rate
85 : Real64 Condmdot = 0.0; // reporting: kg/ - condenser mass flow rate
86 : Real64 Genmdot = 0.0; // reporting: generators mass flow rate when connected to plant
87 : Real64 SteamMdot = 0.0; // reporting: kg/s - steam mass flow rate
88 : Real64 ActualCOP = 0.0; // reporting: coefficient of performance = QEvap/QGenerator
89 : Real64 ChillerPartLoadRatio = 0.0; // reporting: part-load ratio
90 : Real64 ChillerCyclingFrac = 0.0; // reporting: chiller on/off cycling fraction
91 : Real64 LoopLoss = 0.0; // reporting: W - loop loss from absorber outlet to condensate pump inlet
92 : };
93 :
94 : struct IndirectAbsorberSpecs : PlantComponent
95 : {
96 : // Members
97 : std::string Name; // user identifier
98 : Real64 NomCap = 0.0; // W - design nominal capacity of Absorber
99 : bool NomCapWasAutoSized = false; // true if Nominal capacity was autosize on input
100 : Real64 NomPumpPower = 0.0; // W - design nominal capacity of Absorber
101 : bool NomPumpPowerWasAutoSized = false; // true if nominal pump power was autosize on input
102 : Real64 EvapVolFlowRate = 0.0; // m3/s - design nominal water volumetric flow rate through the evaporator
103 : bool EvapVolFlowRateWasAutoSized = false; // true if evaporator flow rate was autosize on input
104 : Real64 CondVolFlowRate = 0.0; // m3/s - design nominal water volumetric flow rate through the condenser
105 : bool CondVolFlowRateWasAutoSized = false; // true if condenser flow rate was autosize on input
106 : Real64 EvapMassFlowRateMax = 0.0; // kg/s - Max Design Evaporator Mass Flow Rate converted from Volume Flow Rate
107 : Real64 CondMassFlowRateMax = 0.0; // Max Design Condenser Mass Flow Rate [kg/s]
108 : Real64 GenMassFlowRateMax = 0.0; // kg/s - Max Design Generator Mass Flow Rate converted from Volume Flow Rate
109 : Real64 MinPartLoadRat = 0.0; // (BLAST MIN) min allowed operating frac full load
110 : Real64 MaxPartLoadRat = 0.0; // (BLAST MAX) max allowed operating frac full load
111 : Real64 OptPartLoadRat = 0.0; // (BLAST BEST) optimal operating frac full load
112 : Real64 TempDesCondIn = 0.0; // C - (BLAST ADJTC(1)The design secondary loop fluid
113 : // temperature at the Absorber condenser side inlet
114 : Real64 MinCondInletTemp = 0.0; // C - minimum condenser inlet temperature for chiller operation
115 : Real64 MinGeneratorInletTemp = 0.0; // C - minimum generator inlet temperature for chiller operation
116 : Real64 TempLowLimitEvapOut = 0.0; // C - low temperature shut off
117 : Real64 GeneratorVolFlowRate = 0.0; // m3/s - hot water volumetric flow rate through generator
118 : bool GeneratorVolFlowRateWasAutoSized = false; // true if hot water flow was autosize on input
119 : Real64 GeneratorSubcool = 0.0; // C - amount of subcooling in steam generator
120 : Real64 LoopSubcool = 0.0; // C - amount of subcooling in steam generator
121 : Real64 GeneratorDeltaTemp = -99999.0; // C - generator fluid temperature difference (water only)
122 : bool GeneratorDeltaTempWasAutoSized = true; // true if generator delta T was autosize on input
123 : Real64 SizFac = 0.0; // Sizing factor
124 : int EvapInletNodeNum = 0; // Node number on the inlet side of the plant
125 : int EvapOutletNodeNum = 0; // Node number on the outlet side of the plant
126 : int CondInletNodeNum = 0; // Node number on the inlet side of the condenser
127 : int CondOutletNodeNum = 0; // Node number on the outlet side of the condenser
128 : int GeneratorInletNodeNum = 0; // Generator inlet node number, steam/water side
129 : int GeneratorOutletNodeNum = 0; // Generator outlet node number, steam/water side
130 : int GeneratorInputCurvePtr = 0; // Index to steam use curve as a function of PLR
131 : int PumpPowerCurvePtr = 0; // Index to pump power curve as a function of PLR
132 : int CapFCondenserTempPtr = 0; // Index to capacity as a function of absorber temp curve
133 : int CapFEvaporatorTempPtr = 0; // Index to capacity as a function of evaporator temp curve
134 : int CapFGeneratorTempPtr = 0; // Index to capacity as a function of generator temp curve
135 : int HeatInputFCondTempPtr = 0; // Index to generator heat input as a function of absorber temp
136 : int HeatInputFEvapTempPtr = 0; // Index to generator heat input as a function of absorber temp
137 : int ErrCount2 = 0; // error counter
138 : DataLoopNode::NodeFluidType GenHeatSourceType =
139 : DataLoopNode::NodeFluidType::Blank; // Generator heat source type, DataLoopNode::NodeFluidType::Steam=3 or
140 : // DataLoopNode::NodeFluidType::Water=2
141 : Fluid::RefrigProps *steam = nullptr; // STEAM Fluid Properties
142 : bool Available = false; // need an array of logicals--load identifiers of available equipment
143 : bool ON = false; // simulate the machine at it's operating part load ratio
144 : DataPlant::FlowMode FlowMode = DataPlant::FlowMode::Invalid; // one of 3 modes for component flow during operation
145 : bool ModulatedFlowSetToLoop = false; // True if the setpoint is missing at the outlet node
146 : bool ModulatedFlowErrDone = false; // true if setpoint warning issued
147 : int MinCondInletTempCtr = 0; // Low condenser temp warning message counter
148 : int MinCondInletTempIndex = 0; // Low condenser temp warning message index
149 : int MinGenInletTempCtr = 0; // Low generator temp warning message counter
150 : int MinGenInletTempIndex = 0; // Low generator temp warning message index
151 : PlantLocation CWPlantLoc; // chilled water plant loop component index
152 : PlantLocation CDPlantLoc; // condenser water plant loop component index
153 : PlantLocation GenPlantLoc; // generator plant loop component index
154 : bool FaultyChillerSWTFlag = false; // True if the chiller has SWT sensor fault
155 : int FaultyChillerSWTIndex = 0; // Index of the fault object corresponding to the chiller
156 : Real64 FaultyChillerSWTOffset = 0.0; // Chiller SWT sensor offset
157 : bool PossibleSubcooling = false; // flag to indicate chiller is doing less cooling that requested
158 : Real64 CondMassFlowRate = 0.0; // Kg/s - condenser mass flow rate, water side
159 : Real64 EvapMassFlowRate = 0.0; // Kg/s - evaporator mass flow rate, water side
160 : Real64 GenMassFlowRate = 0.0; // Kg/s - steam mass flow rate, water side
161 : Real64 CondOutletTemp = 0.0; // C - condenser outlet temperature, water side
162 : Real64 EvapOutletTemp = 0.0; // C - evaporator outlet temperature, water side
163 : Real64 GenOutletTemp = 0.0; // C - generator fluid outlet temperature
164 : Real64 SteamOutletEnthalpy = 0.0; // J/kg - generator fluid outlet enthalpy
165 : Real64 PumpingPower = 0.0; // W - rate of Absorber energy use
166 : Real64 PumpingEnergy = 0.0; // J - Absorber energy use
167 : Real64 QGenerator = 0.0; // W - rate of Absorber steam use
168 : Real64 GeneratorEnergy = 0.0; // J - Absorber steam use
169 : Real64 QEvaporator = 0.0; // W - rate of heat transfer to the evaporator coil
170 : Real64 EvaporatorEnergy = 0.0; // J - heat transfer to the evaporator coil
171 : Real64 QCondenser = 0.0; // W - rate of heat transfer to the condenser coil
172 : Real64 CondenserEnergy = 0.0; // J - heat transfer to the condenser coil
173 : Real64 ChillerONOFFCyclingFrac = 0.0; // fraction of time chiller is on
174 : Real64 EnergyLossToEnvironment = 0.0; // J - piping energy loss from generator outlet to pump inlet
175 : bool GenInputOutputNodesUsed = false;
176 : bool MyOneTimeFlag = true;
177 : bool MyEnvrnFlag = true;
178 : ReportVars Report;
179 : DataBranchAirLoopPlant::ControlType EquipFlowCtrl = DataBranchAirLoopPlant::ControlType::Invalid;
180 :
181 : Fluid::GlycolProps *water = nullptr;
182 :
183 : static IndirectAbsorberSpecs *factory(EnergyPlusData &state, std::string const &objectName);
184 :
185 : void simulate([[maybe_unused]] EnergyPlusData &state,
186 : const PlantLocation &calledFromLocation,
187 : bool FirstHVACIteration,
188 : Real64 &CurLoad,
189 : bool RunFlag) override;
190 :
191 : void getDesignCapacities(
192 : EnergyPlusData &state, const PlantLocation &calledFromLocation, Real64 &MaxLoad, Real64 &MinLoad, Real64 &OptLoad) override;
193 :
194 : void getSizingFactor(Real64 &sizFac) override;
195 :
196 : void onInitLoopEquip([[maybe_unused]] EnergyPlusData &state, const PlantLocation &calledFromLocation) override;
197 :
198 : void oneTimeInit(EnergyPlusData &state) override;
199 :
200 : void initialize(EnergyPlusData &state, bool RunFlag, Real64 MyLoad);
201 :
202 : void setupOutputVars(EnergyPlusData &state);
203 :
204 : void sizeChiller(EnergyPlusData &state);
205 :
206 : void updateRecords(EnergyPlusData &state, Real64 MyLoad, bool RunFlag);
207 :
208 : void calculate(EnergyPlusData &state, Real64 MyLoad, bool RunFlag);
209 : };
210 :
211 : void GetIndirectAbsorberInput(EnergyPlusData &state);
212 :
213 : } // namespace ChillerIndirectAbsorption
214 :
215 : struct ChillerIndirectAbsoprtionData : BaseGlobalStruct
216 : {
217 : bool GetInput = true;
218 : Array1D<ChillerIndirectAbsorption::IndirectAbsorberSpecs> IndirectAbsorber;
219 :
220 2126 : void init_constant_state([[maybe_unused]] EnergyPlusData &state) override
221 : {
222 2126 : }
223 :
224 1152 : void init_state([[maybe_unused]] EnergyPlusData &state) override
225 : {
226 1152 : }
227 :
228 2100 : void clear_state() override
229 : {
230 2100 : new (this) ChillerIndirectAbsoprtionData();
231 2100 : }
232 : };
233 :
234 : } // namespace EnergyPlus
235 :
236 : #endif
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