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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 PlantPressureSystem_hh_INCLUDED
49 : #define PlantPressureSystem_hh_INCLUDED
50 :
51 : // ObjexxFCL Headers
52 : #include <ObjexxFCL/Optional.hh>
53 :
54 : // EnergyPlus Headers
55 : #include <EnergyPlus/Data/BaseData.hh>
56 : #include <EnergyPlus/EnergyPlus.hh>
57 :
58 : namespace EnergyPlus {
59 :
60 : // Forward declarations
61 : struct EnergyPlusData;
62 :
63 : namespace PlantPressureSystem {
64 :
65 : void SimPressureDropSystem(
66 : EnergyPlusData &state,
67 : int LoopNum, // Plant Loop to update pressure information
68 : bool FirstHVACIteration, // System flag
69 : DataPlant::PressureCall CallType, // Enumerated call type
70 : DataPlant::LoopSideLocation LoopSideNum = DataPlant::LoopSideLocation::Invalid, // Loop side num for specific branch simulation
71 : ObjexxFCL::Optional_int_const BranchNum = _ // Branch num for specific branch simulation
72 : );
73 :
74 : void InitPressureDrop(EnergyPlusData &state, int LoopNum, bool FirstHVACIteration);
75 :
76 : void BranchPressureDrop(EnergyPlusData &state,
77 : int LoopNum, // Plant Loop Index
78 : DataPlant::LoopSideLocation LoopSideNum, // LoopSide on Plant Loop LoopNum
79 : int BranchNum // Branch Index on LoopSide LoopSideNum
80 : );
81 :
82 : void UpdatePressureDrop(EnergyPlusData &state, int LoopNum);
83 :
84 : void DistributePressureOnBranch(EnergyPlusData &state,
85 : const int LoopNum,
86 : const DataPlant::LoopSideLocation LoopSideNum,
87 : const int BranchNum,
88 : Real64 &BranchPressureDrop,
89 : bool &PumpFound);
90 :
91 : void PassPressureAcrossMixer(EnergyPlusData &state,
92 : const int LoopNum,
93 : const DataPlant::LoopSideLocation LoopSideNum,
94 : const Real64 MixerPressure,
95 : const int NumBranchesOnLoopSide);
96 :
97 : void PassPressureAcrossSplitter(EnergyPlusData &state,
98 : const int LoopNum,
99 : const DataPlant::LoopSideLocation LoopSideNum,
100 : const Real64 SplitterInletPressure);
101 :
102 : void PassPressureAcrossInterface(EnergyPlusData &state, int LoopNum);
103 :
104 : Real64 ResolveLoopFlowVsPressure(EnergyPlusData &state,
105 : int LoopNum, // - Index of which plant/condenser loop is being simulated
106 : Real64 SystemMassFlow, // - Initial "guess" at system mass flow rate [kg/s]
107 : int PumpCurveNum, // - Pump curve to use when calling the curve manager for psi = f(phi)
108 : Real64 PumpSpeed, // - Pump rotational speed, [rps] (revs per second)
109 : Real64 PumpImpellerDia, // - Nominal pump impeller diameter [m]
110 : Real64 MinPhi, // - Minimum allowable value of phi, requested by the pump manager from curve mgr
111 : Real64 MaxPhi // - Maximum allowable value of phi, requested by the pump manager from curve mgr
112 : );
113 :
114 : } // namespace PlantPressureSystem
115 :
116 : struct PlantPressureSysData : BaseGlobalStruct
117 : {
118 :
119 : bool InitPressureDropOneTimeInit = true;
120 : Array1D_bool LoopInit;
121 : std::array<bool, static_cast<int>(DataPlant::LoopSideLocation::Num)> FullParallelBranchSetFound{false, false};
122 : bool CommonPipeErrorEncountered = false;
123 : int ErrorCounter = 0; // For proper error handling
124 : int ZeroKWarningCounter = 0;
125 : int MaxIterWarningCounter = 0;
126 :
127 2126 : void init_constant_state([[maybe_unused]] EnergyPlusData &state) override
128 : {
129 2126 : }
130 :
131 1152 : void init_state([[maybe_unused]] EnergyPlusData &state) override
132 : {
133 1152 : }
134 :
135 2100 : void clear_state() override
136 : {
137 2100 : this->InitPressureDropOneTimeInit = true;
138 2100 : this->LoopInit.clear();
139 2100 : this->FullParallelBranchSetFound = {false, false};
140 2100 : this->CommonPipeErrorEncountered = false;
141 2100 : this->ErrorCounter = 0;
142 2100 : this->ZeroKWarningCounter = 0;
143 2100 : this->MaxIterWarningCounter = 0;
144 2100 : }
145 : };
146 :
147 : } // namespace EnergyPlus
148 :
149 : #endif
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