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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 :
59 : namespace EnergyPlus {
60 :
61 : namespace HVACCooledBeam {
62 :
63 : enum class CooledBeamType
64 : {
65 : Invalid = -1,
66 : Passive,
67 : Active,
68 : Num
69 : };
70 :
71 : Real64 constexpr NomMassFlowPerBeam(0.07); // nominal water mass flow rate per beam [kg/s]
72 : Real64 constexpr MinWaterVel(0.2); // minimum water velocity [m/s]
73 : Real64 constexpr Coeff2(10000.0);
74 :
75 11 : struct CoolBeamData
76 : {
77 : // Members
78 : // input data
79 : std::string Name; // name of unit
80 : std::string UnitType; // type of unit = AirTerminal:SingleDuct:ConstantVolume:CooledBeam
81 : int UnitType_Num; // index to type of unit = 1 (there's only 1 type so far)
82 : std::string CBTypeString; // type of cooled beam: active | passive
83 : CooledBeamType CBType; // index to type of cooled beam
84 : std::string Sched; // availability schedule
85 : int SchedPtr; // index to schedule
86 : Real64 MaxAirVolFlow; // m3/s (autosizable)
87 : Real64 MaxAirMassFlow; // kg/s
88 : Real64 MaxCoolWaterVolFlow; // m3/s
89 : Real64 MaxCoolWaterMassFlow; // kg/s
90 : int AirInNode; // unit air inlet node number
91 : int AirOutNode; // unit air outlet node number
92 : int CWInNode; // chilled water inlet node
93 : int CWOutNode; // chilled water outlet node
94 : int ADUNum; // index of corresponding air distribution unit
95 : Real64 NumBeams; // number of beams in the zone
96 : Real64 BeamLength; // length of individual beam [m]
97 : Real64 DesInletWaterTemp; // design inlet water temperature [C]
98 : Real64 DesOutletWaterTemp; // design outlet water Temperature [c]
99 : Real64 CoilArea; // coil surface area per coil length [m2/m]
100 : Real64 a; // model parameter a
101 : Real64 n1; // model parameter n0
102 : Real64 n2; // model parameter n1
103 : Real64 n3; // model parameter n2
104 : Real64 a0; // model parameter a0
105 : Real64 K1; // model parameter K1
106 : Real64 n; // model parameter n
107 : Real64 Kin; // Coefficient of Induction Kin
108 : Real64 InDiam; // Leaving Pipe Inside Diameter
109 : // time step variables
110 : Real64 TWIn; // current inlet water temperature [C]
111 : Real64 TWOut; // current outlet water temperature [C]
112 : Real64 EnthWaterOut; // current outlet water enthalpy [J/kg]
113 : Real64 BeamFlow; // supply air flow per beam [m3/s]
114 : Real64 CoolWaterMassFlow; // chilled water mass flow rate [kg/s]
115 : Real64 BeamCoolingEnergy; // Cooled beam cooling energy of all beams in the zone [J]
116 : Real64 BeamCoolingRate; // Cooled beam cooling rate of all beams in the zone [W]
117 : Real64 SupAirCoolingEnergy; // Total cooling energy from supply air [J]
118 : Real64 SupAirCoolingRate; // Total cooling rate from supply air [W]
119 : Real64 SupAirHeatingEnergy; // Total cooling energy from supply air [J]
120 : Real64 SupAirHeatingRate; // Total cooling rate from supply air [W]
121 : PlantLocation CWPlantLoc; // cooling water plant loop component index
122 : int CBLoadReSimIndex;
123 : int CBMassFlowReSimIndex;
124 : int CBWaterOutletTempReSimIndex;
125 : int CtrlZoneNum; // control zone index
126 : int ctrlZoneInNodeIndex; // which controlled zone inlet node number corresponds with this unit
127 : int AirLoopNum; // air loop index that terminal is attached to
128 : Real64 OutdoorAirFlowRate; // zone outdoor air volume flow rate
129 : bool MyEnvrnFlag;
130 : bool MySizeFlag;
131 : bool PlantLoopScanFlag;
132 :
133 : // Default Constructor
134 1 : CoolBeamData()
135 1 : : UnitType_Num(0), CBType(CooledBeamType::Invalid), SchedPtr(0), MaxAirVolFlow(0.0), MaxAirMassFlow(0.0), MaxCoolWaterVolFlow(0.0),
136 : MaxCoolWaterMassFlow(0.0), AirInNode(0), AirOutNode(0), CWInNode(0), CWOutNode(0), ADUNum(0), NumBeams(0.0), BeamLength(0.0),
137 : 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),
138 : InDiam(0.0), TWIn(0.0), TWOut(0.0), EnthWaterOut(0.0), BeamFlow(0.0), CoolWaterMassFlow(0.0), BeamCoolingEnergy(0.0),
139 : BeamCoolingRate(0.0), SupAirCoolingEnergy(0.0), SupAirCoolingRate(0.0), SupAirHeatingEnergy(0.0), SupAirHeatingRate(0.0), CWPlantLoc{},
140 : CBLoadReSimIndex(0), CBMassFlowReSimIndex(0), CBWaterOutletTempReSimIndex(0), CtrlZoneNum(0), ctrlZoneInNodeIndex(0), AirLoopNum(0),
141 1 : OutdoorAirFlowRate(0.0), MyEnvrnFlag(true), MySizeFlag(true), PlantLoopScanFlag(true)
142 : {
143 1 : }
144 :
145 : void CalcOutdoorAirVolumeFlowRate(EnergyPlusData &state);
146 : };
147 :
148 : void SimCoolBeam(EnergyPlusData &state,
149 : std::string_view CompName, // name of the cooled beam unit
150 : bool FirstHVACIteration, // TRUE if first HVAC iteration in time step
151 : int ZoneNum, // index of zone served by the unit
152 : int ZoneNodeNum, // zone node number of zone served by the unit
153 : int &CompIndex, // which cooled beam unit in data structure
154 : Real64 &NonAirSysOutput // convective cooling by the beam system [W]
155 : );
156 :
157 : void GetCoolBeams(EnergyPlusData &state);
158 :
159 : void InitCoolBeam(EnergyPlusData &state,
160 : int CBNum, // number of the current cooled beam unit being simulated
161 : bool FirstHVACIteration // TRUE if first air loop solution this HVAC step
162 : );
163 :
164 : void SizeCoolBeam(EnergyPlusData &state, int CBNum);
165 :
166 : void ControlCoolBeam(EnergyPlusData &state,
167 : int CBNum, // number of the current unit being simulated
168 : int ZoneNum, // number of zone being served
169 : int ZoneNodeNum, // zone node number
170 : bool FirstHVACIteration, // TRUE if 1st HVAC simulation of system timestep
171 : Real64 &NonAirSysOutput // convective cooling by the beam system [W]
172 : );
173 :
174 : void CalcCoolBeam(EnergyPlusData &state,
175 : int CBNum, // Unit index
176 : int ZoneNode, // zone node number
177 : Real64 CWFlow, // cold water flow [kg/s]
178 : Real64 &LoadMet, // load met by unit [W]
179 : Real64 &TWOut // chilled water outlet temperature [C]
180 : );
181 :
182 : void UpdateCoolBeam(EnergyPlusData &state, int CBNum);
183 :
184 : void ReportCoolBeam(EnergyPlusData &state, int CBNum);
185 :
186 : } // namespace HVACCooledBeam
187 :
188 1542 : struct HVACCooledBeamData : BaseGlobalStruct
189 : {
190 : Array1D_bool CheckEquipName;
191 : int NumCB;
192 : Array1D<HVACCooledBeam::CoolBeamData> CoolBeam;
193 : bool GetInputFlag = true; // First time, input is "gotten"
194 : bool ZoneEquipmentListChecked = false; // True after the Zone Equipment List has been checked for items
195 :
196 0 : void clear_state() override
197 : {
198 0 : this->CheckEquipName.clear();
199 0 : this->NumCB = 0;
200 0 : this->CoolBeam.clear();
201 0 : this->GetInputFlag = true;
202 0 : this->ZoneEquipmentListChecked = false;
203 0 : }
204 : };
205 :
206 : } // namespace EnergyPlus
207 :
208 : #endif
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