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47 :
48 : #ifndef HVACCooledBeam_hh_INCLUDED
49 : #define HVACCooledBeam_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/PlantLocation.hh>
59 : #include <EnergyPlus/ScheduleManager.hh>
60 :
61 : namespace EnergyPlus {
62 :
63 : namespace HVACCooledBeam {
64 :
65 : enum class CooledBeamType
66 : {
67 : Invalid = -1,
68 : Passive,
69 : Active,
70 : Num
71 : };
72 :
73 : Real64 constexpr NomMassFlowPerBeam(0.07); // nominal water mass flow rate per beam [kg/s]
74 : Real64 constexpr MinWaterVel(0.2); // minimum water velocity [m/s]
75 : Real64 constexpr Coeff2(10000.0);
76 :
77 : struct CoolBeamData
78 : {
79 : // Members
80 : // input data
81 : std::string Name; // name of unit
82 : std::string UnitType; // type of unit = AirTerminal:SingleDuct:ConstantVolume:CooledBeam
83 : int UnitType_Num; // index to type of unit = 1 (there's only 1 type so far)
84 : std::string CBTypeString; // type of cooled beam: active | passive
85 : CooledBeamType CBType; // index to type of cooled beam
86 : Sched::Schedule *availSched = nullptr; // availability schedule
87 : Real64 MaxAirVolFlow; // m3/s (autosizable)
88 : Real64 MaxAirMassFlow; // kg/s
89 : Real64 MaxCoolWaterVolFlow; // m3/s
90 : Real64 MaxCoolWaterMassFlow; // kg/s
91 : int AirInNode; // unit air inlet node number
92 : int AirOutNode; // unit air outlet node number
93 : int CWInNode; // chilled water inlet node
94 : int CWOutNode; // chilled water outlet node
95 : int ADUNum; // index of corresponding air distribution unit
96 : Real64 NumBeams; // number of beams in the zone
97 : Real64 BeamLength; // length of individual beam [m]
98 : Real64 DesInletWaterTemp; // design inlet water temperature [C]
99 : Real64 DesOutletWaterTemp; // design outlet water Temperature [c]
100 : Real64 CoilArea; // coil surface area per coil length [m2/m]
101 : Real64 a; // model parameter a
102 : Real64 n1; // model parameter n0
103 : Real64 n2; // model parameter n1
104 : Real64 n3; // model parameter n2
105 : Real64 a0; // model parameter a0
106 : Real64 K1; // model parameter K1
107 : Real64 n; // model parameter n
108 : Real64 Kin; // Coefficient of Induction Kin
109 : Real64 InDiam; // Leaving Pipe Inside Diameter
110 : // time step variables
111 : Real64 TWIn; // current inlet water temperature [C]
112 : Real64 TWOut; // current outlet water temperature [C]
113 : Real64 EnthWaterOut; // current outlet water enthalpy [J/kg]
114 : Real64 BeamFlow; // supply air flow per beam [m3/s]
115 : Real64 CoolWaterMassFlow; // chilled water mass flow rate [kg/s]
116 : Real64 BeamCoolingEnergy; // Cooled beam cooling energy of all beams in the zone [J]
117 : Real64 BeamCoolingRate; // Cooled beam cooling rate of all beams in the zone [W]
118 : Real64 SupAirCoolingEnergy; // Total cooling energy from supply air [J]
119 : Real64 SupAirCoolingRate; // Total cooling rate from supply air [W]
120 : Real64 SupAirHeatingEnergy; // Total cooling energy from supply air [J]
121 : Real64 SupAirHeatingRate; // Total cooling rate from supply air [W]
122 : PlantLocation CWPlantLoc; // cooling water plant loop component index
123 : int CBLoadReSimIndex;
124 : int CBMassFlowReSimIndex;
125 : int CBWaterOutletTempReSimIndex;
126 : int CtrlZoneNum; // control zone index
127 : int ctrlZoneInNodeIndex; // which controlled zone inlet node number corresponds with this unit
128 : int AirLoopNum; // air loop index that terminal is attached to
129 : Real64 OutdoorAirFlowRate; // zone outdoor air volume flow rate
130 : bool MyEnvrnFlag;
131 : bool MySizeFlag;
132 : bool PlantLoopScanFlag;
133 :
134 : // Default Constructor
135 2 : CoolBeamData()
136 6 : : UnitType_Num(0), CBType(CooledBeamType::Invalid), MaxAirVolFlow(0.0), MaxAirMassFlow(0.0), MaxCoolWaterVolFlow(0.0),
137 2 : MaxCoolWaterMassFlow(0.0), AirInNode(0), AirOutNode(0), CWInNode(0), CWOutNode(0), ADUNum(0), NumBeams(0.0), BeamLength(0.0),
138 2 : DesInletWaterTemp(0.0), DesOutletWaterTemp(0.0), CoilArea(0.0), a(0.0), n1(0.0), n2(0.0), n3(0.0), a0(0.0), K1(0.0), n(0.0), Kin(0.0),
139 2 : InDiam(0.0), TWIn(0.0), TWOut(0.0), EnthWaterOut(0.0), BeamFlow(0.0), CoolWaterMassFlow(0.0), BeamCoolingEnergy(0.0),
140 2 : BeamCoolingRate(0.0), SupAirCoolingEnergy(0.0), SupAirCoolingRate(0.0), SupAirHeatingEnergy(0.0), SupAirHeatingRate(0.0), CWPlantLoc{},
141 2 : CBLoadReSimIndex(0), CBMassFlowReSimIndex(0), CBWaterOutletTempReSimIndex(0), CtrlZoneNum(0), ctrlZoneInNodeIndex(0), AirLoopNum(0),
142 2 : OutdoorAirFlowRate(0.0), MyEnvrnFlag(true), MySizeFlag(true), PlantLoopScanFlag(true)
143 : {
144 2 : }
145 :
146 : void CalcOutdoorAirVolumeFlowRate(EnergyPlusData &state);
147 : void reportTerminalUnit(EnergyPlusData &state);
148 : };
149 :
150 : void SimCoolBeam(EnergyPlusData &state,
151 : std::string_view CompName, // name of the cooled beam unit
152 : bool FirstHVACIteration, // TRUE if first HVAC iteration in time step
153 : int ZoneNum, // index of zone served by the unit
154 : int ZoneNodeNum, // zone node number of zone served by the unit
155 : int &CompIndex, // which cooled beam unit in data structure
156 : Real64 &NonAirSysOutput // convective cooling by the beam system [W]
157 : );
158 :
159 : void GetCoolBeams(EnergyPlusData &state);
160 :
161 : void InitCoolBeam(EnergyPlusData &state,
162 : int CBNum, // number of the current cooled beam unit being simulated
163 : bool FirstHVACIteration // TRUE if first air loop solution this HVAC step
164 : );
165 :
166 : void SizeCoolBeam(EnergyPlusData &state, int CBNum);
167 :
168 : void ControlCoolBeam(EnergyPlusData &state,
169 : int CBNum, // number of the current unit being simulated
170 : int ZoneNum, // number of zone being served
171 : int ZoneNodeNum, // zone node number
172 : bool FirstHVACIteration, // TRUE if 1st HVAC simulation of system timestep
173 : Real64 &NonAirSysOutput // convective cooling by the beam system [W]
174 : );
175 :
176 : void CalcCoolBeam(EnergyPlusData &state,
177 : int CBNum, // Unit index
178 : int ZoneNode, // zone node number
179 : Real64 CWFlow, // cold water flow [kg/s]
180 : Real64 &LoadMet, // load met by unit [W]
181 : Real64 &TWOut // chilled water outlet temperature [C]
182 : );
183 :
184 : void UpdateCoolBeam(EnergyPlusData &state, int CBNum);
185 :
186 : void ReportCoolBeam(EnergyPlusData &state, int CBNum);
187 :
188 : } // namespace HVACCooledBeam
189 :
190 : struct HVACCooledBeamData : BaseGlobalStruct
191 : {
192 : Array1D_bool CheckEquipName;
193 : int NumCB;
194 : Array1D<HVACCooledBeam::CoolBeamData> CoolBeam;
195 : bool GetInputFlag = true; // First time, input is "gotten"
196 : bool ZoneEquipmentListChecked = false; // True after the Zone Equipment List has been checked for items
197 :
198 2126 : void init_constant_state([[maybe_unused]] EnergyPlusData &state) override
199 : {
200 2126 : }
201 :
202 1152 : void init_state([[maybe_unused]] EnergyPlusData &state) override
203 : {
204 1152 : }
205 :
206 2100 : void clear_state() override
207 : {
208 2100 : this->CheckEquipName.clear();
209 2100 : this->NumCB = 0;
210 2100 : this->CoolBeam.clear();
211 2100 : this->GetInputFlag = true;
212 2100 : this->ZoneEquipmentListChecked = false;
213 2100 : }
214 : };
215 :
216 : } // namespace EnergyPlus
217 :
218 : #endif
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