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47 :
48 : #include <EnergyPlus/Autosizing/CoolingSHRSizing.hh>
49 : #include <EnergyPlus/DXCoils.hh>
50 : #include <EnergyPlus/Data/EnergyPlusData.hh>
51 : #include <EnergyPlus/DataHVACGlobals.hh>
52 : #include <EnergyPlus/General.hh>
53 :
54 : namespace EnergyPlus {
55 :
56 1084 : Real64 CoolingSHRSizer::size(EnergyPlusData &state, Real64 _originalValue, bool &errorsFound)
57 : {
58 1084 : Real64 constexpr RatedInletAirTemp(26.6667); // 26.6667C or 80F
59 1084 : Real64 constexpr RatedInletAirHumRat(0.0111847); // Humidity ratio corresponding to 80F dry bulb/67F wet bulb
60 :
61 1084 : if (!this->checkInitialized(state, errorsFound)) {
62 0 : return 0.0;
63 : }
64 1084 : this->preSize(state, _originalValue);
65 :
66 1084 : if (this->dataFractionUsedForSizing > 0.0) {
67 131 : this->autoSizedValue = this->dataConstantUsedForSizing * this->dataFractionUsedForSizing;
68 : } else {
69 953 : if (this->dataEMSOverrideON) {
70 0 : this->autoSizedValue = this->dataEMSOverride;
71 : } else {
72 953 : if (!this->wasAutoSized &&
73 172 : ((this->curZoneEqNum > 0 && !this->sizingDesRunThisZone) || (this->curSysNum > 0 && !this->sizingDesRunThisAirSys))) {
74 110 : this->autoSizedValue = _originalValue;
75 : } else {
76 843 : if (this->dataFlowUsedForSizing >= HVAC::SmallAirVolFlow && this->dataCapacityUsedForSizing > 0.0) {
77 : // For autosizing the rated SHR, we set a minimum SHR of 0.676 and a maximum of 0.798. The min SHR occurs occurs at the
78 : // minimum flow / capacity ratio = MinRatedVolFlowPerRatedTotCap = 0.00004027 [m3/s / W] = 300 [cfm/ton].
79 : // The max SHR occurs at maximum flow / capacity ratio = MaxRatedVolFlowPerRatedTotCap = 0.00006041 [m3/s / W] = 450
80 : // [cfm/ton]. For flow / capacity ratios between the min and max we linearly interpolate between min and max SHR. Thus
81 : // rated SHR is a linear function of the rated flow / capacity ratio. This linear function (see below) is the result of a
82 : // regression of flow/capacity ratio vs SHR for several actual coils.
83 843 : Real64 RatedVolFlowPerRatedTotCap = this->dataFlowUsedForSizing / this->dataCapacityUsedForSizing;
84 843 : if (state.dataHVACGlobal->DXCT == HVAC::DXCoilType::Regular) {
85 830 : if (RatedVolFlowPerRatedTotCap > HVAC::MaxRatedVolFlowPerRatedTotCap[(int)state.dataHVACGlobal->DXCT]) {
86 16 : this->autoSizedValue = 0.431 + 6086.0 * HVAC::MaxRatedVolFlowPerRatedTotCap[(int)state.dataHVACGlobal->DXCT];
87 814 : } else if (RatedVolFlowPerRatedTotCap < HVAC::MinRatedVolFlowPerRatedTotCap[(int)state.dataHVACGlobal->DXCT]) {
88 13 : this->autoSizedValue = 0.431 + 6086.0 * HVAC::MinRatedVolFlowPerRatedTotCap[(int)state.dataHVACGlobal->DXCT];
89 : } else {
90 801 : this->autoSizedValue = 0.431 + 6086.0 * RatedVolFlowPerRatedTotCap;
91 : }
92 : } else { // DOASDXCoil, or DXCT = 2
93 13 : if (RatedVolFlowPerRatedTotCap > HVAC::MaxRatedVolFlowPerRatedTotCap[(int)state.dataHVACGlobal->DXCT]) {
94 0 : this->autoSizedValue = 0.389 + 7684.0 * HVAC::MaxRatedVolFlowPerRatedTotCap[(int)state.dataHVACGlobal->DXCT];
95 13 : } else if (RatedVolFlowPerRatedTotCap < HVAC::MinRatedVolFlowPerRatedTotCap[(int)state.dataHVACGlobal->DXCT]) {
96 0 : this->autoSizedValue = 0.389 + 7684.0 * HVAC::MinRatedVolFlowPerRatedTotCap[(int)state.dataHVACGlobal->DXCT];
97 : } else {
98 13 : this->autoSizedValue = 0.389 + 7684.0 * RatedVolFlowPerRatedTotCap;
99 : }
100 : }
101 :
102 : // check that the autosized SHR corresponds to a valid apperatus dew point (ADP) temperature
103 1686 : this->autoSizedValue = DXCoils::ValidateADP(state,
104 843 : this->compType,
105 843 : this->compName,
106 : RatedInletAirTemp,
107 : RatedInletAirHumRat,
108 : this->dataCapacityUsedForSizing,
109 : this->dataFlowUsedForSizing,
110 : this->autoSizedValue,
111 843 : this->callingRoutine);
112 843 : if (this->dataSizingFraction < 1.0) {
113 0 : this->autoSizedValue *= this->dataSizingFraction;
114 : }
115 843 : } else {
116 0 : if (this->wasAutoSized) {
117 0 : this->autoSizedValue = 1.0;
118 0 : std::string msg = "Developer Error: For autosizing of " + this->compType + ' ' + this->compName +
119 0 : ", DataFlowUsedForSizing and DataCapacityUsedForSizing " + this->sizingString +
120 0 : " must both be greater than 0.";
121 0 : this->errorType = AutoSizingResultType::ErrorType1;
122 0 : this->addErrorMessage(msg);
123 0 : }
124 : }
125 : }
126 : }
127 : }
128 1084 : this->updateSizingString(state);
129 1084 : this->selectSizerOutput(state, errorsFound);
130 1084 : return this->autoSizedValue;
131 : }
132 :
133 1084 : void CoolingSHRSizer::updateSizingString(EnergyPlusData &state)
134 : {
135 1084 : if (!overrideSizeString) return;
136 : // override sizingString to match existing text
137 1084 : if (this->coilType_Num == HVAC::CoilDX_CoolingTwoSpeed) {
138 134 : if (this->dataDXSpeedNum == 1) { // mode 1 is high speed in DXCoils loop
139 67 : if (this->isEpJSON) {
140 3 : this->sizingString = "high_speed_rated_sensible_heat_ratio";
141 : } else {
142 64 : this->sizingString = "High Speed Rated Sensible Heat Ratio";
143 : }
144 67 : } else if (this->dataDXSpeedNum == 2) {
145 67 : if (this->isEpJSON) {
146 3 : this->sizingString = "low_speed_gross_rated_sensible_heat_ratio";
147 : } else {
148 64 : this->sizingString = "Low Speed Gross Rated Sensible Heat Ratio";
149 : }
150 : }
151 950 : } else if (this->coilType_Num == HVAC::CoilDX_MultiSpeedCooling) {
152 113 : if (this->isEpJSON) {
153 0 : this->sizingString = fmt::format("speed_{}_rated_sensible_heat_ratio", state.dataSize->DataDXSpeedNum);
154 : } else {
155 226 : this->sizingString = fmt::format("Speed {} Rated Sensible Heat Ratio", state.dataSize->DataDXSpeedNum);
156 : }
157 837 : } else if (this->coilType_Num == HVAC::CoilVRF_FluidTCtrl_Cooling) {
158 16 : if (this->isEpJSON) {
159 0 : this->sizingString = "rated_sensible_heat_ratio";
160 : } else {
161 16 : this->sizingString = "Rated Sensible Heat Ratio";
162 : }
163 821 : } else if (this->coilType_Num == HVAC::CoilDX_CurveFit_Speed) {
164 128 : if (this->isEpJSON) {
165 0 : this->sizingString = "gross_sensible_heat_ratio";
166 : } else {
167 128 : this->sizingString = "Gross Sensible Heat Ratio";
168 : }
169 : } else {
170 693 : if (this->isEpJSON) this->sizingString = "gross_rated_sensible_heat_ratio";
171 : }
172 : }
173 :
174 : } // namespace EnergyPlus
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