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47 :
48 : #ifndef ChillerGasAbsorption_hh_INCLUDED
49 : #define ChillerGasAbsorption_hh_INCLUDED
50 :
51 : // ObjexxFCL Headers
52 : #include <ObjexxFCL/Array1D.hh>
53 :
54 : // EnergyPlus Headers
55 : #include <EnergyPlus/Data/BaseData.hh>
56 : #include <EnergyPlus/DataGlobalConstants.hh>
57 : #include <EnergyPlus/DataGlobals.hh>
58 : #include <EnergyPlus/EnergyPlus.hh>
59 : #include <EnergyPlus/Plant/Enums.hh>
60 : #include <EnergyPlus/Plant/PlantLocation.hh>
61 : #include <EnergyPlus/PlantComponent.hh>
62 : #include <EnergyPlus/UtilityRoutines.hh>
63 :
64 : namespace EnergyPlus {
65 :
66 : // Forward declarations
67 : struct EnergyPlusData;
68 :
69 : namespace Curve {
70 : struct Curve;
71 : }
72 :
73 : namespace ChillerGasAbsorption {
74 :
75 : struct GasAbsorberSpecs : PlantComponent
76 : {
77 : // Members
78 : // Parts of Type that do not correspond with IDD definition
79 : bool Available = false; // need an array of logicals--load identifiers of available equipment
80 : bool ON = false; // simulate the machine at it's operating part load ratio
81 : bool InCoolingMode = false;
82 : bool InHeatingMode = false;
83 : // Part of Type that directly corresponds with IDD definition
84 : std::string Name; // user identifier
85 : Constant::eFuel FuelType; // Type of Fuel - DIESEL, GASOLINE, GAS
86 : Real64 NomCoolingCap = 0.0; // W - design nominal capacity of Absorber
87 : bool NomCoolingCapWasAutoSized = false; // true if nominal capacity was autosize on input
88 : Real64 NomHeatCoolRatio = 0.0; // ratio of heating to cooling capacity
89 : Real64 FuelCoolRatio = 0.0; // ratio of fuel input to cooling output
90 : Real64 FuelHeatRatio = 0.0; // ratio of fuel input to heating output
91 : Real64 ElecCoolRatio = 0.0; // ratio of electricity input to cooling output
92 : Real64 ElecHeatRatio = 0.0; // ratio of electricity input to heating output
93 : int ChillReturnNodeNum = 0; // Node number on the inlet side of the plant
94 : int ChillSupplyNodeNum = 0; // Node number on the outlet side of the plant
95 : bool ChillSetPointErrDone = false; // flag to report missing setpoint on CW outlet
96 : bool ChillSetPointSetToLoop = false; // flag to use overall loop setpoint
97 : int CondReturnNodeNum = 0; // Node number on the inlet side of the condenser
98 : int CondSupplyNodeNum = 0; // Node number on the outlet side of the condenser
99 : int HeatReturnNodeNum = 0; // absorber steam inlet node number, water side
100 : int HeatSupplyNodeNum = 0; // absorber steam outlet node number, water side
101 : bool HeatSetPointErrDone = false; // flag to report missing setpoint on HW outlet
102 : bool HeatSetPointSetToLoop = false; // flag to use overall loop setpoint
103 : Real64 MinPartLoadRat = 0.0; // min allowed operating frac full load
104 : Real64 MaxPartLoadRat = 0.0; // max allowed operating frac full load
105 : Real64 OptPartLoadRat = 0.0; // optimal operating frac full load
106 : Real64 TempDesCondReturn = 0.0; // design secondary loop fluid temperature at the Absorber condenser side inlet
107 : Real64 TempDesCHWSupply = 0.0; // design chilled water supply temperature
108 : Real64 EvapVolFlowRate = 0.0; // m**3/s - design nominal water volumetric flow rate through the evaporator
109 : bool EvapVolFlowRateWasAutoSized = false; // true if evaporator flow rate was autosize on input
110 : Real64 CondVolFlowRate = 0.0; // m**3/s - design nominal water volumetric flow rate through the condenser
111 : bool CondVolFlowRateWasAutoSized = false; // true if condenser flow rate was autosize on input
112 : Real64 HeatVolFlowRate = 0.0; // m**3/s - design nominal water volumetric flow rate through the heater side
113 : bool HeatVolFlowRateWasAutoSized = false; // true if hot water flow rate was autosize on input
114 : Real64 SizFac = 0.0; // sizing factor
115 : Curve::Curve *CoolCapFTCurve = nullptr; // cooling capacity as a function of temperature curve (chilled water temp,
116 : // condenser water temp)
117 : Curve::Curve *FuelCoolFTCurve = nullptr; // Fuel-Input-to cooling output Ratio Function of Temperature Curve (chilled
118 : // water temp, condenser water temp)
119 : Curve::Curve *FuelCoolFPLRCurve = nullptr; // Fuel-Input-to cooling output Ratio Function of Part Load Ratio Curve
120 : Curve::Curve *ElecCoolFTCurve = nullptr; // Electric-Input-to cooling output Ratio Function of Temperature Curve
121 : // (chilled water temp, condenser water temp)
122 : Curve::Curve *ElecCoolFPLRCurve = nullptr; // Electric-Input-to cooling output Ratio Function of Part Load Ratio Curve
123 : Curve::Curve *HeatCapFCoolCurve = nullptr; // Heating Capacity Function of Cooling Capacity Curve
124 : Curve::Curve *FuelHeatFHPLRCurve = nullptr; // Fuel Input to heat output ratio during heating only function
125 : bool isEnterCondensTemp = false; // if using entering conderser water temperature is TRUE, exiting is FALSE
126 : bool isWaterCooled = false; // if water cooled it is TRUE
127 : Real64 CHWLowLimitTemp = 0.0; // Chilled Water Lower Limit Temperature
128 : Real64 FuelHeatingValue = 0.0;
129 : // Calculated design values
130 : Real64 DesCondMassFlowRate = 0.0; // design nominal mass flow rate of water through the condenser [kg/s]
131 : Real64 DesHeatMassFlowRate = 0.0; // design nominal mass flow rate of water through the hot water side [kg/s]
132 : Real64 DesEvapMassFlowRate = 0.0; // design nominal mass flow rate of water through chilled water side [kg/s]
133 : // other values used during simulation
134 : int DeltaTempCoolErrCount = 0; // error count for Delta Temp = 0 while cooling
135 : int DeltaTempHeatErrCount = 0; // error count for Delta Temp = 0 while heating
136 : int CondErrCount = 0; // error count for poor Condenser Supply Estimate
137 : int lCondWaterMassFlowRate_Index = 0; // index for condenser water mass flow rate too low recurring severe warning
138 : bool PossibleSubcooling = false; // Flag to determine whether plant is overcooled
139 : // loop topology variables
140 : PlantLocation CWplantLoc; // chilled water plant loop component index
141 : PlantLocation CDplantLoc; // condenser water plant loop component index
142 : PlantLocation HWplantLoc; // hot water plant loop component index
143 : bool envrnFlag = true;
144 : Real64 oldCondSupplyTemp = 0.0; // save the last iteration value of leaving condenser water temperature
145 :
146 : // Originally on report variable structure
147 : Real64 CoolingLoad = 0.0; // cooling load on the chiller (previously called QEvap)
148 : Real64 CoolingEnergy = 0.0; // variable to track total cooling load for period (was EvapEnergy)
149 : Real64 HeatingLoad = 0.0; // heating load on the chiller
150 : Real64 HeatingEnergy = 0.0; // heating energy
151 : Real64 TowerLoad = 0.0; // load on the cooling tower/condenser (previously called QCond)
152 : Real64 TowerEnergy = 0.0; // variable to track total tower load for a period (was CondEnergy)
153 : Real64 FuelUseRate = 0.0; // instantaneous use of gas for period
154 : Real64 FuelEnergy = 0.0; // variable to track total fuel used for a period
155 : Real64 CoolFuelUseRate = 0.0; // instantaneous use of gas for period for cooling
156 : Real64 CoolFuelEnergy = 0.0; // variable to track total fuel used for a period for cooling
157 : Real64 HeatFuelUseRate = 0.0; // instantaneous use of gas for period for heating
158 : Real64 HeatFuelEnergy = 0.0; // variable to track total fuel used for a period for heating
159 : Real64 ElectricPower = 0.0; // parasitic electric power used (was PumpingPower)
160 : Real64 ElectricEnergy = 0.0; // track the total electricity used for a period (was PumpingEnergy)
161 : Real64 CoolElectricPower = 0.0; // parasitic electric power used for cooling
162 : Real64 CoolElectricEnergy = 0.0; // track the total electricity used for a period for cooling
163 : Real64 HeatElectricPower = 0.0; // parasitic electric power used for heating
164 : Real64 HeatElectricEnergy = 0.0; // track the total electricity used for a period for heating
165 : Real64 ChillReturnTemp = 0.0; // reporting: evaporator inlet temperature (was EvapInletTemp)
166 : Real64 ChillSupplyTemp = 0.0; // reporting: evaporator outlet temperature (was EvapOutletTemp)
167 : Real64 ChillWaterFlowRate = 0.0; // reporting: evaporator mass flow rate (was Evapmdot)
168 : Real64 CondReturnTemp = 0.0; // reporting: condenser inlet temperature (was CondInletTemp)
169 : Real64 CondSupplyTemp = 0.0; // reporting: condenser outlet temperature (was CondOutletTemp)
170 : Real64 CondWaterFlowRate = 0.0; // reporting: condenser mass flow rate (was Condmdot)
171 : Real64 HotWaterReturnTemp = 0.0; // reporting: hot water return (inlet) temperature
172 : Real64 HotWaterSupplyTemp = 0.0; // reporting: hot water supply (outlet) temperature
173 : Real64 HotWaterFlowRate = 0.0; // reporting: hot water mass flow rate
174 : Real64 CoolPartLoadRatio = 0.0; // operating part load ratio (load/capacity for cooling)
175 : Real64 HeatPartLoadRatio = 0.0; // operating part load ratio (load/capacity for heating)
176 : Real64 CoolingCapacity = 0.0; // current capacity after temperature adjustment
177 : Real64 HeatingCapacity = 0.0; // current heating capacity
178 : Real64 FractionOfPeriodRunning = 0.0; // fraction of the time period that the unit is operating
179 : Real64 FuelCOP = 0.0; // reporting: cooling output/fuel input = CoolingLoad/CoolFuelUseRate
180 :
181 : static GasAbsorberSpecs *factory(EnergyPlusData &state, std::string const &objectName);
182 :
183 : void
184 : simulate(EnergyPlusData &state, const PlantLocation &calledFromLocation, bool FirstHVACIteration, Real64 &CurLoad, bool RunFlag) override;
185 :
186 : void getDesignCapacities(
187 : EnergyPlusData &state, const PlantLocation &calledFromLocation, Real64 &MaxLoad, Real64 &MinLoad, Real64 &OptLoad) override;
188 :
189 : void getSizingFactor(Real64 &SizFac) override;
190 :
191 : void onInitLoopEquip(EnergyPlusData &state, const PlantLocation &calledFromLocation) override;
192 :
193 : void getDesignTemperatures(Real64 &TempDesCondIn, Real64 &TempDesEvapOut) override;
194 :
195 : void oneTimeInit(EnergyPlusData &state) override;
196 :
197 : void oneTimeInit_new(EnergyPlusData &state) override;
198 :
199 : void initialize(EnergyPlusData &state);
200 :
201 : void setupOutputVariables(EnergyPlusData &state);
202 :
203 : void size(EnergyPlusData &state);
204 :
205 : void calculateChiller(EnergyPlusData &state, Real64 &MyLoad);
206 :
207 : void calculateHeater(EnergyPlusData &state, Real64 &MyLoad, bool RunFlag);
208 :
209 : void updateCoolRecords(EnergyPlusData &state,
210 : Real64 MyLoad, // current load
211 : bool RunFlag // TRUE if Absorber operating
212 : );
213 :
214 : void updateHeatRecords(EnergyPlusData &state,
215 : Real64 MyLoad, // current load
216 : bool RunFlag // TRUE if Absorber operating
217 : );
218 : };
219 :
220 : void GetGasAbsorberInput(EnergyPlusData &state);
221 :
222 : } // namespace ChillerGasAbsorption
223 :
224 : struct ChillerGasAbsorptionData : BaseGlobalStruct
225 : {
226 : bool getGasAbsorberInputs = true;
227 : Array1D<ChillerGasAbsorption::GasAbsorberSpecs> GasAbsorber;
228 :
229 2126 : void init_constant_state([[maybe_unused]] EnergyPlusData &state) override
230 : {
231 2126 : }
232 :
233 1152 : void init_state([[maybe_unused]] EnergyPlusData &state) override
234 : {
235 1152 : }
236 :
237 2100 : void clear_state() override
238 : {
239 2100 : new (this) ChillerGasAbsorptionData();
240 2100 : }
241 : };
242 :
243 : } // namespace EnergyPlus
244 :
245 : #endif
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