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1 : // EnergyPlus, Copyright (c) 1996-2023, The Board of Trustees of the University of Illinois,
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47 :
48 : #ifndef DataConvergParams_hh_INCLUDED
49 : #define DataConvergParams_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 :
59 : namespace EnergyPlus {
60 :
61 : namespace DataConvergParams {
62 :
63 : // Note: Unless otherwise noted, the tolerance parameters listed below were chosen
64 : // to represent educated guesses at what the tolerances for individual physical
65 : // parameters should be.
66 : constexpr Real64 HVACEnthalpyToler(260.0); // Tolerance for enthalpy comparisons (in kJ/kgK)
67 : constexpr Real64 HVACFlowRateToler(0.01); // Tolerance for mass flow rate convergence (in kg/s) [~20 CFM]
68 : constexpr Real64 HVACFlowRateSlopeToler(0.001); // Slope tolerance for mass flow, kg/s/iteration
69 : constexpr Real64 HVACFlowRateOscillationToler(0.0000001); // tolerance for detecting duplicate flow rate in stack
70 : constexpr Real64 HVACHumRatToler(0.0001); // Tolerance for humidity ratio comparisons (kg water/kg dryair)
71 : constexpr Real64 HVACHumRatSlopeToler(0.00001); // Slope tolerance for humidity ratio, kg water/kg-dryair/iteration
72 : constexpr Real64 HVACHumRatOscillationToler(0.00000001); // tolerance for detecting duplicate humidity ratio in stack
73 : constexpr Real64 HVACPressToler(10.0); // Tolerance for pressure comparisons (in Pascals)
74 : constexpr Real64 HVACTemperatureToler(0.01); // Tolerance for temperature comparisons (in degrees C or K)
75 : constexpr Real64 HVACTemperatureSlopeToler(0.001); // Slope tolerance for Temperature, Deg C/iteration
76 : constexpr Real64 HVACTemperatureOscillationToler(0.000001); // tolerance for detecting duplicate temps in stack
77 : constexpr Real64 HVACEnergyToler(10.0); // Tolerance for Energy comparisons (in Watts W)
78 : // to be consistent, should be 20.d0 (BG Aug 2012)
79 :
80 : constexpr Real64 HVACCpApprox(1004.844); // Air Cp (20C,0.0Kg/Kg) Only for energy Tolerance Calculation
81 : // Only used to scale the answer for a more intuitive answer for comparison
82 :
83 : constexpr Real64 PlantFlowRateToler(0.001); // Tolerance for mass flow rate convergence (in kg/s) [~2 CFM]
84 : constexpr Real64 PlantFlowRateOscillationToler(0.0000001);
85 : constexpr Real64 PlantFlowRateSlopeToler(0.0001); // Slope tolerance for mass flow, kg/s/iteration
86 :
87 : constexpr Real64 PlantPressToler(10.0); // Tolerance for pressure comparisons (in Pascals)
88 : constexpr Real64 PlantTemperatureToler(0.01); // Tolerance for temperature comparisons (in degrees C or K)
89 : constexpr Real64 PlantTemperatureSlopeToler(0.001); // Slope tolerance for Temperature, Deg C/iteration
90 : constexpr Real64 PlantTemperatureOscillationToler(0.000001); // tolerance for detecting duplicate temps in stack
91 :
92 : constexpr Real64 PlantEnergyToler(10.0); // Tolerance for Energy comparisons (in Watts W)
93 :
94 : // Energy Tolerance Calculation, used to scale the answer for a more intuitive answer for comparison
95 : constexpr Real64 PlantFlowFlowRateToler(0.01); // Tolerance for mass flow rate convergence (in kg/s)
96 : constexpr Real64 PlantLowFlowRateToler(0.000001); // Tolerance for low flow rate used for determining when plant pumps can be shut down
97 :
98 : constexpr int ConvergLogStackDepth(10);
99 :
100 : enum class CalledFrom
101 : {
102 : Invalid = -1,
103 : AirSystemDemandSide,
104 : AirSystemSupplySideDeck1,
105 : AirSystemSupplySideDeck2,
106 : Num
107 : };
108 :
109 4017 : struct HVACNodeConvergLogStruct
110 : {
111 : int NodeNum = 0;
112 : std::array<Real64, ConvergLogStackDepth> HumidityRatio;
113 : std::array<Real64, ConvergLogStackDepth> MassFlowRate;
114 : std::array<Real64, ConvergLogStackDepth> Temperature;
115 : };
116 :
117 11156 : struct HVACZoneInletConvergenceStruct
118 : {
119 : std::string ZoneName;
120 : int NumInletNodes = 0; // number of inlet nodes for zone
121 : Array1D<HVACNodeConvergLogStruct> InletNode;
122 : };
123 :
124 770 : struct HVACAirLoopIterationConvergenceStruct
125 : {
126 : std::array<bool, 3> HVACMassFlowNotConverged = {false}; // Flag to show mass flow convergence
127 : std::array<Real64, ConvergLogStackDepth> HVACFlowDemandToSupplyTolValue = {0.0}; // Queue of convergence "results"
128 : std::array<Real64, ConvergLogStackDepth> HVACFlowSupplyDeck1ToDemandTolValue = {0.0}; // Queue of convergence "results"
129 : std::array<Real64, ConvergLogStackDepth> HVACFlowSupplyDeck2ToDemandTolValue = {0.0}; // Queue of convergence "results"
130 : std::array<bool, 3> HVACHumRatNotConverged = {false}; // Flag to show humidity ratio convergence or failure
131 : std::array<Real64, ConvergLogStackDepth> HVACHumDemandToSupplyTolValue = {0.0}; // Queue of convergence "results"
132 : std::array<Real64, ConvergLogStackDepth> HVACHumSupplyDeck1ToDemandTolValue = {0.0}; // Queue of convergence "results"
133 : std::array<Real64, ConvergLogStackDepth> HVACHumSupplyDeck2ToDemandTolValue = {0.0}; // Queue of convergence "results"
134 : std::array<bool, 3> HVACTempNotConverged = {false}; // Flag to show temperature convergence or failure
135 : std::array<Real64, ConvergLogStackDepth> HVACTempDemandToSupplyTolValue = {0.0}; // Queue of convergence "results"
136 : std::array<Real64, ConvergLogStackDepth> HVACTempSupplyDeck1ToDemandTolValue = {0.0}; // Queue of convergence "results"
137 : std::array<Real64, ConvergLogStackDepth> HVACTempSupplyDeck2ToDemandTolValue = {0.0}; // Queue of convergence "results"
138 : std::array<bool, 3> HVACEnergyNotConverged = {false}; // Flag to show energy convergence or failure
139 : std::array<Real64, ConvergLogStackDepth> HVACEnergyDemandToSupplyTolValue = {0.0}; // Queue of convergence "results"
140 : std::array<Real64, ConvergLogStackDepth> HVACEnergySupplyDeck1ToDemandTolValue = {0.0}; // Queue of convergence "results"
141 : std::array<Real64, ConvergLogStackDepth> HVACEnergySupplyDeck2ToDemandTolValue = {0.0}; // Queue of convergence "results"
142 : std::array<Real64, ConvergLogStackDepth> HVACEnthalpyDemandToSupplyTolValue = {0.0}; // Queue of convergence "results"
143 : std::array<Real64, ConvergLogStackDepth> HVACEnthalpySupplyDeck1ToDemandTolValue = {0.0}; // Queue of convergence "results"
144 : std::array<Real64, ConvergLogStackDepth> HVACEnthalpySupplyDeck2ToDemandTolValue = {0.0}; // Queue of convergence "results"
145 : std::array<Real64, ConvergLogStackDepth> HVACPressureDemandToSupplyTolValue = {0.0}; // Queue of convergence "results"
146 : std::array<Real64, ConvergLogStackDepth> HVACPressureSupplyDeck1ToDemandTolValue = {0.0}; // Queue of convergence "results"
147 : std::array<Real64, ConvergLogStackDepth> HVACPressueSupplyDeck2ToDemandTolValue = {0.0}; // Queue of convergence "results"
148 : };
149 :
150 444 : struct PlantIterationConvergenceStruct
151 : {
152 : // Members
153 : bool PlantMassFlowNotConverged = false; // Flag to show mass flow convergence
154 : std::array<Real64, ConvergLogStackDepth> PlantFlowDemandToSupplyTolValue = {0.0}; // Queue of convergence "results"
155 : std::array<Real64, ConvergLogStackDepth> PlantFlowSupplyToDemandTolValue; // Queue of convergence "results"
156 : bool PlantTempNotConverged = false; // Flag to show temperature convergence (0) or failure (1)
157 : std::array<Real64, ConvergLogStackDepth> PlantTempDemandToSupplyTolValue; // Queue of convergence "results"
158 : std::array<Real64, ConvergLogStackDepth> PlantTempSupplyToDemandTolValue; // Queue of convergence "results"
159 : };
160 :
161 : } // namespace DataConvergParams
162 :
163 1542 : struct ConvergParamsData : BaseGlobalStruct
164 : {
165 :
166 : Real64 MinTimeStepSys = (1.0 / 60.0); // =1 minute
167 : Real64 MinTimeStepTol = 1.0e-4; // = min allowable for ABS(1.-TimeStepSys/(MinTimeStepSys))
168 : Real64 MaxZoneTempDiff = 0.3; // 0.3 C = (1% OF 300 C) = max allowable difference between
169 : int MaxIter = 20; // maximum number of iterations allowed
170 : int MaxPlantSubIterations = 8; // Iteration Max for Plant Simulation sub iterations
171 : int MinPlantSubIterations = 2; // Iteration Min for Plant Simulation sub iterations
172 :
173 : Array1D<DataConvergParams::HVACZoneInletConvergenceStruct> ZoneInletConvergence;
174 : Array1D<DataConvergParams::HVACAirLoopIterationConvergenceStruct> AirLoopConvergence;
175 : Array1D<DataConvergParams::PlantIterationConvergenceStruct> PlantConvergence;
176 :
177 0 : void clear_state() override
178 : {
179 0 : *this = ConvergParamsData();
180 0 : }
181 : };
182 :
183 : } // namespace EnergyPlus
184 :
185 : #endif
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