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47 :
48 : #include <EnergyPlus/Autosizing/CoolingWaterflowSizing.hh>
49 : #include <EnergyPlus/Data/EnergyPlusData.hh>
50 : #include <EnergyPlus/DataEnvironment.hh>
51 : #include <EnergyPlus/DataHVACGlobals.hh>
52 : #include <EnergyPlus/FluidProperties.hh>
53 : #include <EnergyPlus/Psychrometrics.hh>
54 :
55 : namespace EnergyPlus {
56 :
57 62 : Real64 CoolingWaterflowSizer::size(EnergyPlusData &state, Real64 _originalValue, bool &errorsFound)
58 : {
59 62 : if (!this->checkInitialized(state, errorsFound)) {
60 1 : return 0.0;
61 : }
62 61 : this->preSize(state, _originalValue);
63 61 : Real64 CoilDesWaterDeltaT = this->dataWaterCoilSizCoolDeltaT;
64 : // component used AutoCalculate method to size value
65 : // AutoCalculate is not used for cooling coil water flow sizing
66 61 : if (this->dataFractionUsedForSizing > 0.0) {
67 0 : this->autoSizedValue = this->dataConstantUsedForSizing * this->dataFractionUsedForSizing;
68 : } else {
69 61 : if (this->curZoneEqNum > 0) {
70 32 : if (!this->wasAutoSized && !this->sizingDesRunThisZone) {
71 3 : this->autoSizedValue = _originalValue;
72 : } else {
73 29 : if (this->termUnitIU && (this->curTermUnitSizingNum > 0)) {
74 1 : this->autoSizedValue = this->termUnitSizing(this->curTermUnitSizingNum).MaxCWVolFlow;
75 28 : } else if (this->zoneEqFanCoil || this->zoneEqUnitVent || this->zoneEqVentedSlab) {
76 18 : this->autoSizedValue = this->zoneEqSizing(this->curZoneEqNum).MaxCWVolFlow;
77 : } else {
78 10 : Real64 CoilInTemp = this->finalZoneSizing(this->curZoneEqNum).DesCoolCoilInTemp;
79 10 : Real64 CoilOutTemp = this->finalZoneSizing(this->curZoneEqNum).CoolDesTemp;
80 10 : Real64 CoilOutHumRat = this->finalZoneSizing(this->curZoneEqNum).CoolDesHumRat;
81 10 : Real64 CoilInHumRat = this->finalZoneSizing(this->curZoneEqNum).DesCoolCoilInHumRat;
82 : Real64 DesCoilLoad =
83 10 : this->finalZoneSizing(this->curZoneEqNum).DesCoolMassFlow *
84 10 : (Psychrometrics::PsyHFnTdbW(CoilInTemp, CoilInHumRat) - Psychrometrics::PsyHFnTdbW(CoilOutTemp, CoilOutHumRat));
85 10 : Real64 DesVolFlow = this->finalZoneSizing(this->curZoneEqNum).DesCoolMassFlow / state.dataEnvrn->StdRhoAir;
86 : // add fan heat to coil load
87 10 : DesCoilLoad += BaseSizerWithFanHeatInputs::calcFanDesHeatGain(DesVolFlow);
88 10 : if (DesCoilLoad >= HVAC::SmallLoad) {
89 12 : if (this->dataWaterLoopNum > 0 && this->dataWaterLoopNum <= (int)state.dataPlnt->PlantLoop.size() &&
90 6 : this->dataWaterCoilSizCoolDeltaT > 0.0) {
91 6 : Real64 Cp = state.dataPlnt->PlantLoop(this->dataWaterLoopNum)
92 6 : .glycol->getSpecificHeat(state, Constant::CWInitConvTemp, this->callingRoutine);
93 6 : Real64 rho = state.dataPlnt->PlantLoop(this->dataWaterLoopNum)
94 6 : .glycol->getDensity(state, Constant::CWInitConvTemp, this->callingRoutine);
95 6 : this->autoSizedValue = DesCoilLoad / (CoilDesWaterDeltaT * Cp * rho);
96 : } else {
97 0 : this->autoSizedValue = 0.0;
98 : std::string msg =
99 0 : "Developer Error: For autosizing of " + this->compType + ' ' + this->compName +
100 0 : ", certain inputs are required. Add PlantLoop, Plant loop number, coil capacity and/or Water Coil water delta T.";
101 0 : this->errorType = AutoSizingResultType::ErrorType1;
102 0 : this->addErrorMessage(msg);
103 0 : ShowSevereError(state, msg);
104 0 : }
105 : } else {
106 4 : this->autoSizedValue = 0.0;
107 : }
108 : }
109 : }
110 29 : } else if (this->curSysNum > 0) {
111 29 : if (!this->wasAutoSized && !this->sizingDesRunThisAirSys) {
112 3 : this->autoSizedValue = _originalValue;
113 : } else {
114 26 : if (this->curOASysNum > 0) CoilDesWaterDeltaT *= 0.5;
115 26 : if (this->dataCapacityUsedForSizing >= HVAC::SmallLoad) {
116 26 : if (this->dataWaterLoopNum > 0 && this->dataWaterLoopNum <= (int)state.dataPlnt->PlantLoop.size() && CoilDesWaterDeltaT > 0.0) {
117 26 : Real64 Cp = state.dataPlnt->PlantLoop(this->dataWaterLoopNum)
118 26 : .glycol->getSpecificHeat(state, Constant::CWInitConvTemp, this->callingRoutine);
119 26 : Real64 rho = state.dataPlnt->PlantLoop(this->dataWaterLoopNum)
120 26 : .glycol->getDensity(state, Constant::CWInitConvTemp, this->callingRoutine);
121 26 : this->autoSizedValue = this->dataCapacityUsedForSizing / (CoilDesWaterDeltaT * Cp * rho);
122 : } else {
123 0 : this->autoSizedValue = 0.0;
124 : std::string msg =
125 0 : "Developer Error: For autosizing of " + this->compType + ' ' + this->compName +
126 0 : ", certain inputs are required. Add PlantLoop, Plant loop number, coil capacity and/or Water Coil water delta T.";
127 0 : this->errorType = AutoSizingResultType::ErrorType1;
128 0 : this->addErrorMessage(msg);
129 0 : ShowSevereError(state, msg);
130 0 : }
131 : } else {
132 0 : this->autoSizedValue = 0.0;
133 : // Warning about zero design coil load is issued elsewhere.
134 : }
135 : }
136 : }
137 : }
138 : // override sizing string for detailed coil model
139 61 : if (this->overrideSizeString) {
140 61 : if (this->coilType_Num == HVAC::Coil_CoolingWaterDetailed) {
141 6 : if (this->isEpJSON) {
142 0 : this->sizingString = "maximum_water_flow_rate [m3/s]";
143 : } else {
144 6 : this->sizingString = "Maximum Water Flow Rate [m3/s]";
145 : }
146 : } else {
147 55 : if (this->isEpJSON) this->sizingString = "design_water_flow_rate [m3/s]";
148 : }
149 : }
150 61 : this->selectSizerOutput(state, errorsFound);
151 61 : if (this->isCoilReportObject) {
152 61 : state.dataRptCoilSelection->coilSelectionReportObj->setCoilWaterFlowPltSizNum(
153 61 : state, this->compName, this->compType, this->autoSizedValue, this->wasAutoSized, this->dataPltSizCoolNum, this->dataWaterLoopNum);
154 61 : state.dataRptCoilSelection->coilSelectionReportObj->setCoilWaterDeltaT(state, this->compName, this->compType, CoilDesWaterDeltaT);
155 61 : if (this->dataDesInletWaterTemp > 0.0) {
156 22 : state.dataRptCoilSelection->coilSelectionReportObj->setCoilEntWaterTemp(
157 22 : state, this->compName, this->compType, this->dataDesInletWaterTemp);
158 22 : state.dataRptCoilSelection->coilSelectionReportObj->setCoilLvgWaterTemp(
159 22 : state, this->compName, this->compType, this->dataDesInletWaterTemp + CoilDesWaterDeltaT);
160 : } else {
161 39 : state.dataRptCoilSelection->coilSelectionReportObj->setCoilEntWaterTemp(state, this->compName, this->compType, Constant::CWInitConvTemp);
162 39 : state.dataRptCoilSelection->coilSelectionReportObj->setCoilLvgWaterTemp(
163 39 : state, this->compName, this->compType, Constant::CWInitConvTemp + CoilDesWaterDeltaT);
164 : }
165 : }
166 61 : return this->autoSizedValue;
167 : }
168 :
169 1 : void CoolingWaterflowSizer::clearState()
170 : {
171 1 : BaseSizerWithFanHeatInputs::clearState();
172 1 : }
173 :
174 : } // namespace EnergyPlus
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