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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/DataGlobals.hh>
57 : #include <EnergyPlus/EnergyPlus.hh>
58 : #include <EnergyPlus/Plant/Enums.hh>
59 : #include <EnergyPlus/Plant/PlantLocation.hh>
60 : #include <EnergyPlus/PlantComponent.hh>
61 :
62 : namespace EnergyPlus {
63 :
64 : // Forward declarations
65 : struct EnergyPlusData;
66 :
67 : namespace ChillerGasAbsorption {
68 :
69 4 : struct GasAbsorberSpecs : PlantComponent
70 : {
71 : // Members
72 : // Parts of Type that do not correspond with IDD definition
73 : bool Available = false; // need an array of logicals--load identifiers of available equipment
74 : bool ON = false; // simulate the machine at it's operating part load ratio
75 : bool InCoolingMode = false;
76 : bool InHeatingMode = false;
77 : // Part of Type that directly corresponds with IDD definition
78 : std::string Name; // user identifier
79 : std::string FuelType; // Type of Fuel - DIESEL, GASOLINE, GAS
80 : Real64 NomCoolingCap = 0.0; // W - design nominal capacity of Absorber
81 : bool NomCoolingCapWasAutoSized = false; // true if nominal capacity was autosize on input
82 : Real64 NomHeatCoolRatio = 0.0; // ratio of heating to cooling capacity
83 : Real64 FuelCoolRatio = 0.0; // ratio of fuel input to cooling output
84 : Real64 FuelHeatRatio = 0.0; // ratio of fuel input to heating output
85 : Real64 ElecCoolRatio = 0.0; // ratio of electricity input to cooling output
86 : Real64 ElecHeatRatio = 0.0; // ratio of electricity input to heating output
87 : int ChillReturnNodeNum = 0; // Node number on the inlet side of the plant
88 : int ChillSupplyNodeNum = 0; // Node number on the outlet side of the plant
89 : bool ChillSetPointErrDone = false; // flag to report missing setpoint on CW outlet
90 : bool ChillSetPointSetToLoop = false; // flag to use overall loop setpoint
91 : int CondReturnNodeNum = 0; // Node number on the inlet side of the condenser
92 : int CondSupplyNodeNum = 0; // Node number on the outlet side of the condenser
93 : int HeatReturnNodeNum = 0; // absorber steam inlet node number, water side
94 : int HeatSupplyNodeNum = 0; // absorber steam outlet node number, water side
95 : bool HeatSetPointErrDone = false; // flag to report missing setpoint on HW outlet
96 : bool HeatSetPointSetToLoop = false; // flag to use overall loop setpoint
97 : Real64 MinPartLoadRat = 0.0; // min allowed operating frac full load
98 : Real64 MaxPartLoadRat = 0.0; // max allowed operating frac full load
99 : Real64 OptPartLoadRat = 0.0; // optimal operating frac full load
100 : Real64 TempDesCondReturn = 0.0; // design secondary loop fluid temperature at the Absorber condenser side inlet
101 : Real64 TempDesCHWSupply = 0.0; // design chilled water supply temperature
102 : Real64 EvapVolFlowRate = 0.0; // m**3/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; // m**3/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 HeatVolFlowRate = 0.0; // m**3/s - design nominal water volumetric flow rate through the heater side
107 : bool HeatVolFlowRateWasAutoSized = false; // true if hot water flow rate was autosize on input
108 : Real64 SizFac = 0.0; // sizing factor
109 : int CoolCapFTCurve = 0; // cooling capacity as a function of temperature curve (chilled water temp,
110 : // condenser water temp)
111 : int FuelCoolFTCurve = 0; // Fuel-Input-to cooling output Ratio Function of Temperature Curve (chilled
112 : // water temp, condenser water temp)
113 : int FuelCoolFPLRCurve = 0; // Fuel-Input-to cooling output Ratio Function of Part Load Ratio Curve
114 : int ElecCoolFTCurve = 0; // Electric-Input-to cooling output Ratio Function of Temperature Curve
115 : // (chilled water temp, condenser water temp)
116 : int ElecCoolFPLRCurve = 0; // Electric-Input-to cooling output Ratio Function of Part Load Ratio Curve
117 : int HeatCapFCoolCurve = 0; // Heating Capacity Function of Cooling Capacity Curve
118 : int FuelHeatFHPLRCurve = 0; // Fuel Input to heat output ratio during heating only function
119 : bool isEnterCondensTemp = false; // if using entering conderser water temperature is TRUE, exiting is FALSE
120 : bool isWaterCooled = false; // if water cooled it is TRUE
121 : Real64 CHWLowLimitTemp = 0.0; // Chilled Water Lower Limit Temperature
122 : Real64 FuelHeatingValue = 0.0;
123 : // Calculated design values
124 : Real64 DesCondMassFlowRate = 0.0; // design nominal mass flow rate of water through the condenser [kg/s]
125 : Real64 DesHeatMassFlowRate = 0.0; // design nominal mass flow rate of water through the hot water side [kg/s]
126 : Real64 DesEvapMassFlowRate = 0.0; // design nominal mass flow rate of water through chilled water side [kg/s]
127 : // other values used during simulation
128 : int DeltaTempCoolErrCount = 0; // error count for Delta Temp = 0 while cooling
129 : int DeltaTempHeatErrCount = 0; // error count for Delta Temp = 0 while heating
130 : int CondErrCount = 0; // error count for poor Condenser Supply Estimate
131 : int lCondWaterMassFlowRate_Index = 0; // index for condenser water mass flow rate too low recurring severe warning
132 : bool PossibleSubcooling = false; // Flag to determine whether plant is overcooled
133 : // loop topology variables
134 : PlantLocation CWplantLoc; // chilled water plant loop component index
135 : PlantLocation CDplantLoc; // condenser water plant loop component index
136 : PlantLocation HWplantLoc; // hot water plant loop component index
137 : bool envrnFlag = true;
138 : Real64 oldCondSupplyTemp = 0.0; // save the last iteration value of leaving condenser water temperature
139 :
140 : // Originally on report variable structure
141 : Real64 CoolingLoad = 0.0; // cooling load on the chiller (previously called QEvap)
142 : Real64 CoolingEnergy = 0.0; // variable to track total cooling load for period (was EvapEnergy)
143 : Real64 HeatingLoad = 0.0; // heating load on the chiller
144 : Real64 HeatingEnergy = 0.0; // heating energy
145 : Real64 TowerLoad = 0.0; // load on the cooling tower/condenser (previously called QCond)
146 : Real64 TowerEnergy = 0.0; // variable to track total tower load for a period (was CondEnergy)
147 : Real64 FuelUseRate = 0.0; // instantaneous use of gas for period
148 : Real64 FuelEnergy = 0.0; // variable to track total fuel used for a period
149 : Real64 CoolFuelUseRate = 0.0; // instantaneous use of gas for period for cooling
150 : Real64 CoolFuelEnergy = 0.0; // variable to track total fuel used for a period for cooling
151 : Real64 HeatFuelUseRate = 0.0; // instantaneous use of gas for period for heating
152 : Real64 HeatFuelEnergy = 0.0; // variable to track total fuel used for a period for heating
153 : Real64 ElectricPower = 0.0; // parasitic electric power used (was PumpingPower)
154 : Real64 ElectricEnergy = 0.0; // track the total electricity used for a period (was PumpingEnergy)
155 : Real64 CoolElectricPower = 0.0; // parasitic electric power used for cooling
156 : Real64 CoolElectricEnergy = 0.0; // track the total electricity used for a period for cooling
157 : Real64 HeatElectricPower = 0.0; // parasitic electric power used for heating
158 : Real64 HeatElectricEnergy = 0.0; // track the total electricity used for a period for heating
159 : Real64 ChillReturnTemp = 0.0; // reporting: evaporator inlet temperature (was EvapInletTemp)
160 : Real64 ChillSupplyTemp = 0.0; // reporting: evaporator outlet temperature (was EvapOutletTemp)
161 : Real64 ChillWaterFlowRate = 0.0; // reporting: evaporator mass flow rate (was Evapmdot)
162 : Real64 CondReturnTemp = 0.0; // reporting: condenser inlet temperature (was CondInletTemp)
163 : Real64 CondSupplyTemp = 0.0; // reporting: condenser outlet temperature (was CondOutletTemp)
164 : Real64 CondWaterFlowRate = 0.0; // reporting: condenser mass flow rate (was Condmdot)
165 : Real64 HotWaterReturnTemp = 0.0; // reporting: hot water return (inlet) temperature
166 : Real64 HotWaterSupplyTemp = 0.0; // reporting: hot water supply (outlet) temperature
167 : Real64 HotWaterFlowRate = 0.0; // reporting: hot water mass flow rate
168 : Real64 CoolPartLoadRatio = 0.0; // operating part load ratio (load/capacity for cooling)
169 : Real64 HeatPartLoadRatio = 0.0; // operating part load ratio (load/capacity for heating)
170 : Real64 CoolingCapacity = 0.0; // current capacity after temperature adjustment
171 : Real64 HeatingCapacity = 0.0; // current heating capacity
172 : Real64 FractionOfPeriodRunning = 0.0; // fraction of the time period that the unit is operating
173 : Real64 FuelCOP = 0.0; // reporting: cooling output/fuel input = CoolingLoad/CoolFuelUseRate
174 :
175 : static PlantComponent *factory(EnergyPlusData &state, std::string const &objectName);
176 :
177 : void
178 : simulate(EnergyPlusData &state, const PlantLocation &calledFromLocation, bool FirstHVACIteration, Real64 &CurLoad, bool RunFlag) override;
179 :
180 : void getDesignCapacities(
181 : EnergyPlusData &state, const PlantLocation &calledFromLocation, Real64 &MaxLoad, Real64 &MinLoad, Real64 &OptLoad) override;
182 :
183 : void getSizingFactor(Real64 &SizFac) override;
184 :
185 : void onInitLoopEquip(EnergyPlusData &state, const PlantLocation &calledFromLocation) override;
186 :
187 : void getDesignTemperatures(Real64 &TempDesCondIn, Real64 &TempDesEvapOut) override;
188 :
189 : void oneTimeInit(EnergyPlusData &state) override;
190 :
191 : void oneTimeInit_new(EnergyPlusData &state) override;
192 :
193 : void initialize(EnergyPlusData &state);
194 :
195 : void setupOutputVariables(EnergyPlusData &state);
196 :
197 : void size(EnergyPlusData &state);
198 :
199 : void calculateChiller(EnergyPlusData &state, Real64 &MyLoad);
200 :
201 : void calculateHeater(EnergyPlusData &state, Real64 &MyLoad, bool RunFlag);
202 :
203 : void updateCoolRecords(EnergyPlusData &state,
204 : Real64 MyLoad, // current load
205 : bool RunFlag // TRUE if Absorber operating
206 : );
207 :
208 : void updateHeatRecords(EnergyPlusData &state,
209 : Real64 MyLoad, // current load
210 : bool RunFlag // TRUE if Absorber operating
211 : );
212 : };
213 :
214 : void GetGasAbsorberInput(EnergyPlusData &state);
215 :
216 : } // namespace ChillerGasAbsorption
217 :
218 1542 : struct ChillerGasAbsorptionData : BaseGlobalStruct
219 : {
220 : bool getGasAbsorberInputs = true;
221 : Array1D<ChillerGasAbsorption::GasAbsorberSpecs> GasAbsorber;
222 :
223 0 : void clear_state() override
224 : {
225 0 : *this = ChillerGasAbsorptionData();
226 0 : }
227 : };
228 :
229 : } // namespace EnergyPlus
230 :
231 : #endif
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