Line data Source code
1 : // EnergyPlus, Copyright (c) 1996-2023, The Board of Trustees of the University of Illinois,
2 : // The Regents of the University of California, through Lawrence Berkeley National Laboratory
3 : // (subject to receipt of any required approvals from the U.S. Dept. of Energy), Oak Ridge
4 : // National Laboratory, managed by UT-Battelle, Alliance for Sustainable Energy, LLC, and other
5 : // contributors. All rights reserved.
6 : //
7 : // NOTICE: This Software was developed under funding from the U.S. Department of Energy and the
8 : // U.S. Government consequently retains certain rights. As such, the U.S. Government has been
9 : // granted for itself and others acting on its behalf a paid-up, nonexclusive, irrevocable,
10 : // worldwide license in the Software to reproduce, distribute copies to the public, prepare
11 : // derivative works, and perform publicly and display publicly, and to permit others to do so.
12 : //
13 : // Redistribution and use in source and binary forms, with or without modification, are permitted
14 : // provided that the following conditions are met:
15 : //
16 : // (1) Redistributions of source code must retain the above copyright notice, this list of
17 : // conditions and the following disclaimer.
18 : //
19 : // (2) Redistributions in binary form must reproduce the above copyright notice, this list of
20 : // conditions and the following disclaimer in the documentation and/or other materials
21 : // provided with the distribution.
22 : //
23 : // (3) Neither the name of the University of California, Lawrence Berkeley National Laboratory,
24 : // the University of Illinois, U.S. Dept. of Energy nor the names of its contributors may be
25 : // used to endorse or promote products derived from this software without specific prior
26 : // written permission.
27 : //
28 : // (4) Use of EnergyPlus(TM) Name. If Licensee (i) distributes the software in stand-alone form
29 : // without changes from the version obtained under this License, or (ii) Licensee makes a
30 : // reference solely to the software portion of its product, Licensee must refer to the
31 : // software as "EnergyPlus version X" software, where "X" is the version number Licensee
32 : // obtained under this License and may not use a different name for the software. Except as
33 : // specifically required in this Section (4), Licensee shall not use in a company name, a
34 : // product name, in advertising, publicity, or other promotional activities any name, trade
35 : // name, trademark, logo, or other designation of "EnergyPlus", "E+", "e+" or confusingly
36 : // similar designation, without the U.S. Department of Energy's prior written consent.
37 : //
38 : // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
39 : // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
40 : // AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
41 : // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
42 : // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
43 : // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
44 : // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
45 : // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
46 : // POSSIBILITY OF SUCH DAMAGE.
47 :
48 : #ifndef CondenserLoopTowers_hh_INCLUDED
49 : #define CondenserLoopTowers_hh_INCLUDED
50 :
51 : // C++ Headers
52 : #include <unordered_map>
53 :
54 : // ObjexxFCL Headers
55 : #include <ObjexxFCL/Array1D.hh>
56 :
57 : // EnergyPlus Headers
58 : #include <EnergyPlus/Data/BaseData.hh>
59 : #include <EnergyPlus/DataGlobals.hh>
60 : #include <EnergyPlus/EnergyPlus.hh>
61 : #include <EnergyPlus/Plant/Enums.hh>
62 : #include <EnergyPlus/Plant/PlantLocation.hh>
63 : #include <EnergyPlus/PlantComponent.hh>
64 :
65 : namespace EnergyPlus {
66 :
67 : // Forward declarations
68 : struct EnergyPlusData;
69 :
70 : namespace CondenserLoopTowers {
71 :
72 : enum class ModelType
73 : {
74 : // Empirical Model Type
75 : Invalid = -1,
76 : CoolToolsXFModel,
77 : CoolToolsUserDefined,
78 : YorkCalcModel,
79 : YorkCalcUserDefined,
80 : Num
81 : };
82 :
83 : enum class EvapLoss
84 : {
85 : Invalid = -1,
86 : UserFactor,
87 : MoistTheory,
88 : Num
89 : };
90 :
91 : enum class Blowdown
92 : {
93 : Invalid = -1,
94 : Concentration,
95 : Schedule,
96 : Num
97 : };
98 :
99 : enum class PIM
100 : {
101 : Invalid = -1,
102 : NominalCapacity,
103 : UFactor,
104 : Num
105 : };
106 :
107 : enum class CapacityCtrl
108 : {
109 : Invalid = -1,
110 : FanCycling,
111 : FluidBypass,
112 : Num
113 : };
114 :
115 : constexpr std::array<std::string_view, static_cast<int>(CapacityCtrl::Num)> CapacityCtrlNamesUC{"FANCYCLING", "FLUIDBYPASS"};
116 :
117 : enum class CellCtrl
118 : {
119 : Invalid = -1,
120 : MinCell,
121 : MaxCell,
122 : Num
123 : };
124 :
125 1014 : struct CoolingTower : PlantComponent
126 : {
127 : // Members
128 : std::string Name; // User identifier
129 : DataPlant::PlantEquipmentType TowerType = DataPlant::PlantEquipmentType::Invalid;
130 : PIM PerformanceInputMethod_Num = PIM::Invalid; // Method of entering tower performance: UA and Design Water
131 : // Flow Rate, or Nominal Capacity
132 : std::string ModelCoeffObjectName; // Cooling Tower:Variable Speed Model Coefficient Object name
133 : bool Available = true; // need an array of logicals--load identifiers of available equipment
134 : bool ON = true; // Simulate the machine at it's operating part load ratio
135 : Real64 DesignWaterFlowRate = 0.0; // Design water flow rate through the tower [m3/s]
136 : bool DesignWaterFlowRateWasAutoSized = false; // true if previous was autosize on input
137 : Real64 DesignWaterFlowPerUnitNomCap = 0.0; // scalable sizing factor for water flow per capacity [m3/s/W]
138 : Real64 DesWaterMassFlowRate = 0.0; // Design water flow rate through the entire tower [kg/s]
139 : Real64 DesWaterMassFlowRatePerCell = 0.0; // Design water flow rate per cell [Kg/s]
140 : Real64 HighSpeedAirFlowRate = 0.0; // Air flow rate through tower at high speed [m3/s]
141 : bool HighSpeedAirFlowRateWasAutoSized = false; // true if previous was autosize on input
142 : Real64 DesignAirFlowPerUnitNomCap = 0.0; // scalable sizing factor for air flow per capacity [m3/s/W]
143 : bool DefaultedDesignAirFlowScalingFactor = false; // true if user left input field blank for DesignAirFlowPerUnitNomCap
144 : Real64 HighSpeedFanPower = 0.0; // Fan power at high fan speed [W]
145 : bool HighSpeedFanPowerWasAutoSized = false; // true if fan power was autosize on input
146 : Real64 DesignFanPowerPerUnitNomCap = 0.0; // scalable sizing factor for fan power per capacity [W/W]
147 :
148 : Real64 HighSpeedTowerUA = 0.0; // UA of tower at high fan speed [W/C]
149 : bool HighSpeedTowerUAWasAutoSized = false; // true if previous was autosize on input
150 : Real64 LowSpeedAirFlowRate = 0.0; // Air flow rate through tower at low speed [m3/s]
151 : bool LowSpeedAirFlowRateWasAutoSized = false; // true if previous was autosize on input
152 : Real64 LowSpeedAirFlowRateSizingFactor = 0.0; // sizing factor for low speed flow rate [ ]
153 : Real64 LowSpeedFanPower = 0.0; // Fan power at low fan speed [W]
154 : bool LowSpeedFanPowerWasAutoSized = false; // true if low speed fan power was autosized on input
155 : Real64 LowSpeedFanPowerSizingFactor = 0.0; // sizing factor for low speed fan power []
156 : Real64 LowSpeedTowerUA = 0.0; // UA of tower at low fan speed [W/C]
157 : bool LowSpeedTowerUAWasAutoSized = false; // ture if low speed UA was autosize on input
158 : Real64 LowSpeedTowerUASizingFactor = 0.0; // sizing factor for UA at low fan speed []
159 : Real64 FreeConvAirFlowRate = 0.0; // Air flow rate through tower with fan off [m3/s]
160 : bool FreeConvAirFlowRateWasAutoSized = false; // true if previous was autosize on input
161 : Real64 FreeConvAirFlowRateSizingFactor = 0.0; // sizing factor for air flow at free conv []
162 : Real64 FreeConvTowerUA = 0.0; // UA of tower with fan off [W/C]
163 : bool FreeConvTowerUAWasAutoSized = false; // true if previous was autosize on input
164 : Real64 FreeConvTowerUASizingFactor = 0.0; // sizing factor for UA at fre convection []
165 : Real64 DesignInletWB = 0.0; // Design inlet air wet-bulb temperature (C)
166 : Real64 DesignApproach = 0.0; // Design approach (outlet water temp minus inlet air wet-bulb temp (C)
167 : Real64 DesignRange = 0.0; // Design range temperature (inlet water temp minus outlet water temp (C)
168 : Real64 MinimumVSAirFlowFrac = 0.0; // Min air flow ratio (used for VS tower only, point where free conv occurs)
169 : Real64 CalibratedWaterFlowRate = 0.0; // Water flow ratio required for model calibration
170 : Real64 BasinHeaterPowerFTempDiff = 0.0; // Basin heater capacity per degree C below setpoint (W/C)
171 : Real64 BasinHeaterSetPointTemp = 0.0; // setpoint temperature for basin heater operation (C)
172 : Real64 MakeupWaterDrift = 0.0; // Makeup water flow rate fraction due to drift
173 : Real64 FreeConvectionCapacityFraction = 0.0; // Percentage of tower capacity in free convection regime
174 : Real64 TowerMassFlowRateMultiplier = 0.0; // Maximum tower flow rate is this multiplier times design flow rate
175 : Real64 HeatRejectCapNomCapSizingRatio = 1.25; // ratio of actual cap to nominal capacity []
176 : Real64 TowerNominalCapacity = 0.0; // Nominal capacity of the tower [W] with entering water at 35C (95F),
177 : // leaving water at 29.44C (85F), entering air at 25.56C (78F) wet-bulb
178 : // temp and 35C (95F) dry-bulb temp, and water flow
179 : // rate of 5.382E-8 m3/s per watt (3 gpm/ton)
180 : bool TowerNominalCapacityWasAutoSized = false; // true if tower nominal capacity was autosized on input
181 : Real64 TowerLowSpeedNomCap = 0.0; // Nominal capacity of the tower [W] with entering water at 35C (95F),
182 : // leaving water at 29.44C (85F), entering air at 25.56C (78F) wet-bulb
183 : // temp and 35C (95F) dry-bulb temp, and water flow
184 : // rate of 5.382E-8 m3/s per nominal capacity watt (3 gpm/ton)
185 : bool TowerLowSpeedNomCapWasAutoSized = false; // true if previous was autosize on input
186 : Real64 TowerLowSpeedNomCapSizingFactor = 0.0; // sizing factor for low speed capacity []
187 : Real64 TowerFreeConvNomCap = 0.0; // Nominal capacity of the tower [W] with entering water at 35C (95F),
188 : // leaving water at 29.44C (85F), entering air at 25.56C (78F) wet-bulb
189 : // temp and 35C (95F) dry-bulb temp, and water flow
190 : // rate of 5.382E-8 m3/s per nominal capacity watt (3 gpm/ton)
191 : bool TowerFreeConvNomCapWasAutoSized = false; // true if previous was autosize on Input
192 : Real64 TowerFreeConvNomCapSizingFactor = 0.0; // sizing factor for free conv capacity []
193 : Real64 SizFac = 0.0; // sizing factor
194 : int WaterInletNodeNum = 0; // Node number on the water inlet side of the tower
195 : int WaterOutletNodeNum = 0; // Node number on the water outlet side of the tower
196 : int OutdoorAirInletNodeNum = 0; // Node number of outdoor air inlet for the tower
197 : ModelType TowerModelType = ModelType::Invalid; // Type of empirical model (1=CoolTools)
198 : int VSTower = 0; // Index to a variable speed tower (otherwise = 0)
199 : int FanPowerfAirFlowCurve = 0; // Index to fan power correlation curve for VS Towers
200 : int BlowDownSchedulePtr = 0; // Pointer to blow down schedule
201 : int BasinHeaterSchedulePtr = 0; // Pointer to basin heater schedule
202 : int HighMassFlowErrorCount = 0; // Counter when mass flow rate is > Design*TowerMassFlowRateMultiplier
203 : int HighMassFlowErrorIndex = 0; // Index for high mass flow recurring error message
204 : int OutletWaterTempErrorCount = 0; // Counter when outlet water temperature is < minimum allowed temperature
205 : int OutletWaterTempErrorIndex = 0; // Index for outlet water temperature recurring error message
206 : int SmallWaterMassFlowErrorCount = 0; // Counter when water mass flow rate is very small
207 : int SmallWaterMassFlowErrorIndex = 0; // Index for very small water mass flow rate recurring error message
208 : int WMFRLessThanMinAvailErrCount = 0; // Counter when water mass flow rate is less than minimum available
209 : int WMFRLessThanMinAvailErrIndex = 0; // Index for water mass flow rate less than minavail recurring message
210 : int WMFRGreaterThanMaxAvailErrCount = 0; // Counter when water mass flow rate is greater than minimum available
211 : int WMFRGreaterThanMaxAvailErrIndex = 0; // Index for water mass flow rate > minavail recurring message
212 : int CoolingTowerAFRRFailedCount = 0; // Counter for air flow rate ratio out of bounds error
213 : int CoolingTowerAFRRFailedIndex = 0; // Index for air flow rate ratio out of bounds error
214 : int SpeedSelected = 0; // speed of the two-speed fan selected (0:ON;1:LOW;2:HIGH)
215 : // fluid bypass
216 : CapacityCtrl CapacityControl = CapacityCtrl::Invalid; // Type of capacity control for single speed cooling tower:
217 : // 0 - FanCycling, 1 - FluidBypass
218 : Real64 BypassFraction = 0.0; // Fraction of fluid bypass as a ratio of total fluid flow
219 : // through the tower sump
220 : // multi cell tower
221 : int NumCell = 0; // Number of cells in the cooling tower
222 : CellCtrl cellCtrl = CellCtrl::MaxCell;
223 : int NumCellOn = 0; // number of cells working
224 : Real64 MinFracFlowRate = 0.0; // Minimal fraction of design flow/cell allowable
225 : Real64 MaxFracFlowRate = 0.0; // Maximal ratio of design flow/cell allowable
226 : // begin water system interactions
227 : EvapLoss EvapLossMode = EvapLoss::MoistTheory; // sets how tower water evaporation is modeled
228 : Real64 UserEvapLossFactor = 0.0; // simple model [%/Delt C]
229 : Real64 DriftLossFraction = 0.008; // default value is 0.008%
230 : Blowdown BlowdownMode = Blowdown::Concentration; // sets how tower water blowdown is modeled
231 : Real64 ConcentrationRatio = 3.0; // ratio of solids in blowdown vs make up water
232 : int SchedIDBlowdown = 0; // index "pointer" to schedule of blowdown in [m3/s]
233 : bool SuppliedByWaterSystem = false;
234 : int WaterTankID = 0; // index "pointer" to WaterStorage structure
235 : int WaterTankDemandARRID = 0; // index "pointer" to demand array inside WaterStorage structure
236 : // end water system variables
237 : // loop topology variables
238 : PlantLocation plantLoc;
239 : // Merkel VS model curves
240 : int UAModFuncAirFlowRatioCurvePtr = 0; // curve index for UA modifier as a function of air flow ratio
241 : int UAModFuncWetBulbDiffCurvePtr = 0; // curve index for UA modifier as a function of local wetbulb
242 : int UAModFuncWaterFlowRatioCurvePtr = 0; // curve index for UA modifier as a function of water flow ratio
243 : bool SetpointIsOnOutlet = false; // if true look to outlet node of tower, if flase look to overall loop setpoint
244 : int VSMerkelAFRErrorIter = 0; // error counter for regula falsi failed with max iterations, vs merkel model
245 : int VSMerkelAFRErrorIterIndex = 0; // recurring error index for regula falsi failed with max iterations, vs merkel model
246 : int VSMerkelAFRErrorFail = 0; // error counter for regula falsi failed with limits exceeded, vs merkel model
247 : int VSMerkelAFRErrorFailIndex = 0; // recurring error index for regula falsi failed with limits exceeded, vs merkel model
248 : Real64 DesInletWaterTemp = 0.0; // design tower inlet water temperature (C)
249 : Real64 DesOutletWaterTemp = 0.0; // design tower outlet water temperature (C)
250 : Real64 DesInletAirDBTemp = 0.0; // design tower inlet air dry-bulb temperature (C)
251 : Real64 DesInletAirWBTemp = 0.0; // design tower outlet air wet-bulb temperature (C)
252 : Real64 DesApproach = 0.0; // design tower approach temperature (deltaC)
253 : Real64 DesRange = 0.0; // design tower range temperature (deltaC)
254 : bool TowerInletCondsAutoSize = false; // true if tower inlet condition is autosized or defaulted to autosize
255 : // Operational fault parameters
256 : bool FaultyCondenserSWTFlag = false; // True if the condenser has SWT sensor fault
257 : int FaultyCondenserSWTIndex = 0; // Index of the fault object corresponding to the condenser
258 : Real64 FaultyCondenserSWTOffset = 0.0; // Condenser SWT sensor offset
259 : bool FaultyTowerFoulingFlag = false; // True if the tower has fouling fault
260 : int FaultyTowerFoulingIndex = 0; // Index of the fouling fault object corresponding to the condenser
261 : Real64 FaultyTowerFoulingFactor = 1.0; // Tower fouling factor
262 : std::string EndUseSubcategory; // identifier use for the end use subcategory
263 : bool envrnFlag = true;
264 : bool oneTimeFlag = true;
265 : Real64 TimeStepSysLast = 0.0; // last system time step (used to check for downshifting)
266 : Real64 CurrentEndTimeLast = 0.0; // end time of time step for last simulation time step
267 :
268 : // From module level variables, apparently the module AirFlowRateRatio was used slightly different from the struct's AirFlowRatio variable
269 : // so removing this caused diffs that I did not spend time investigating...they might be fine diffs, check some time later
270 : Real64 airFlowRateRatio = 0.0;
271 :
272 : // From TowerInletConds struct
273 : Real64 WaterTemp = 0.0; // Tower water inlet temperature (C)
274 : Real64 AirTemp = 0.0; // Tower air inlet dry-bulb temperature (C)
275 : Real64 AirWetBulb = 0.0; // Tower air inlet wet-bulb temperature (C)
276 : Real64 AirPress = 0.0; // Tower air barometric pressure
277 : Real64 AirHumRat = 0.0; // Tower air inlet humidity ratio (kg/kg)
278 :
279 : // From ReportVars struct
280 : Real64 InletWaterTemp = 0.0; // Tower inlet water temperature (C)
281 : Real64 OutletWaterTemp = 0.0; // Tower outlet water temperature (C)
282 : Real64 WaterMassFlowRate = 0.0; // Tower water mass flow rate (m3/s)
283 : Real64 Qactual = 0.0; // Tower heat rejection rate (W)
284 : Real64 FanPower = 0.0; // Tower fan power (W)
285 : Real64 FanEnergy = 0.0; // Tower fan energy consumption (J)
286 : Real64 AirFlowRatio = 0.0; // Air flow ratio through variable speed cooling tower
287 : Real64 BasinHeaterPower = 0.0; // Basin heater power (W)
288 : Real64 BasinHeaterConsumption = 0.0; // Basin heater energy consumption (J)
289 : Real64 WaterUsage = 0.0; // Tower water usage (m3/s)
290 : Real64 WaterAmountUsed = 0.0; // Tower make up water usage (m3)
291 : Real64 FanCyclingRatio = 0.0; // cycling ratio of tower fan when min fan speed provide too much capacity (for VFD)
292 : Real64 EvaporationVdot = 0.0;
293 : Real64 EvaporationVol = 0.0;
294 : Real64 DriftVdot = 0.0;
295 : Real64 DriftVol = 0.0;
296 : Real64 BlowdownVdot = 0.0;
297 : Real64 BlowdownVol = 0.0;
298 : Real64 MakeUpVdot = 0.0;
299 : Real64 MakeUpVol = 0.0;
300 : Real64 TankSupplyVdot = 0.0;
301 : Real64 TankSupplyVol = 0.0;
302 : Real64 StarvedMakeUpVdot = 0.0;
303 : Real64 StarvedMakeUpVol = 0.0;
304 :
305 : // From VSTower struct - for Variable speed towers only
306 : std::array<Real64, 35> Coeff = {0.0}; // - model coefficients
307 : bool FoundModelCoeff = false; // - TRUE if model is calibratable
308 : Real64 MinInletAirWBTemp = 0.0; // - model limit for min inlet air WB temp
309 : Real64 MaxInletAirWBTemp = 0.0; // - model limit for max inlet air WB temp
310 : Real64 MinRangeTemp = 0.0; // - model limit for min range temp
311 : Real64 MaxRangeTemp = 0.0; // - model limit for max range temp
312 : Real64 MinApproachTemp = 0.0; // - model limit for min approach temp
313 : Real64 MaxApproachTemp = 0.0; // - model limit for max approach temp
314 : Real64 MinWaterFlowRatio = 0.0; // - model limit for min water flow rate ratio
315 : Real64 MaxWaterFlowRatio = 0.0; // - model limit for max water flow rate ratio
316 : Real64 MaxLiquidToGasRatio = 0.0; // - model limit for max liquid to gas ratio
317 : int VSErrorCountFlowFrac = 0; // - counter if water flow rate ratio limits are exceeded
318 : int VSErrorCountWFRR = 0; // - counter if water flow rate ratio limits are exceeded
319 : int VSErrorCountIAWB = 0; // - counter if inlet air wet-bulb temperature limits are exceeded
320 : int VSErrorCountTR = 0; // - counter if tower range temperature limits are exceeded
321 : int VSErrorCountTA = 0; // - counter if tower approach temperature limits are exceeded
322 : int ErrIndexFlowFrac = 0; // - index to recurring error structure for liquid to gas ratio
323 : int ErrIndexWFRR = 0; // - index to recurring error structure for water flow rate ratio
324 : int ErrIndexIAWB = 0; // - index to recurring error structure for inlet air WB
325 : int ErrIndexTR = 0; // - index to recurring error structure for tower range
326 : int ErrIndexTA = 0; // - index to recurring error structure for tower approach
327 : int ErrIndexLG = 0; // - index to recurring error structure for tower liquid/gas ratio
328 : //- Tr = Range temperature
329 : std::string TrBuffer1; // - buffer to print Tr warning messages on following time step
330 : std::string TrBuffer2; // - buffer to print Tr warning messages on following time step
331 : std::string TrBuffer3; // - buffer to print Tr warning messages on following time step
332 : //- Twb = Wet-bulb temperature
333 : std::string TwbBuffer1; // - buffer to print Twb warning messages on following time step
334 : std::string TwbBuffer2; // - buffer to print Twb warning messages on following time step
335 : std::string TwbBuffer3; // - buffer to print Twb warning messages on following time step
336 : //- Ta = Approach temperature
337 : std::string TaBuffer1; // - buffer to print Ta warning messages on following time step
338 : std::string TaBuffer2; // - buffer to print Ta warning messages on following time step
339 : std::string TaBuffer3; // - buffer to print Ta warning messages on following time step
340 : //- WFRR = Water flow rate ratio
341 : std::string WFRRBuffer1; // - buffer to print WFRR warning messages on following time step
342 : std::string WFRRBuffer2; // - buffer to print WFRR warning messages on following time step
343 : std::string WFRRBuffer3; // - buffer to print WFRR warning messages on following time step
344 : //- LG = Liquid to gas ratio
345 : std::string LGBuffer1; // - buffer to print LG warning messages on following time step
346 : std::string LGBuffer2; // - buffer to print LG warning messages on following time step
347 : bool PrintTrMessage = false; // - flag to print Tr error message
348 : bool PrintTwbMessage = false; // - flag to print Twb error message
349 : bool PrintTaMessage = false; // - flag to print Ta error message
350 : bool PrintWFRRMessage = false; // - flag to print WFRR error message
351 : bool PrintLGMessage = false; // - flag to print liquid-gas ratio error message
352 : Real64 TrLast = 0.0; // value of Tr when warning occurred (passed to Recurring Warning)
353 : Real64 TwbLast = 0.0; // value of Twb when warning occurred (passed to Recurring Warning)
354 : Real64 TaLast = 0.0; // value of Ta when warning occurred (passed to Recurring Warning)
355 : Real64 WaterFlowRateRatioLast = 0.0; // value of WFRR when warning occurred (passed to Recurring Warn)
356 : Real64 LGLast = 0.0; // value of LG when warning occurred (passed to Recurring Warn)
357 :
358 : void simulate([[maybe_unused]] EnergyPlusData &state,
359 : const PlantLocation &calledFromLocation,
360 : bool FirstHVACIteration,
361 : Real64 &CurLoad,
362 : bool RunFlag) override;
363 :
364 : void getDesignCapacities(EnergyPlusData &state,
365 : [[maybe_unused]] const PlantLocation &calledFromLocation,
366 : Real64 &MaxLoad,
367 : Real64 &MinLoad,
368 : Real64 &OptLoad) override;
369 :
370 : void getSizingFactor(Real64 &SizFac) override;
371 :
372 : void onInitLoopEquip([[maybe_unused]] EnergyPlusData &state, [[maybe_unused]] const PlantLocation &calledFromLocation) override;
373 :
374 : void oneTimeInit(EnergyPlusData &state) override;
375 :
376 : void initEachEnvironment(EnergyPlusData &state);
377 :
378 : void initialize(EnergyPlusData &state);
379 :
380 : void setupOutputVariables(EnergyPlusData &state);
381 :
382 : void SizeTower(EnergyPlusData &state);
383 :
384 : void SizeVSMerkelTower(EnergyPlusData &state);
385 :
386 : void calculateSingleSpeedTower(EnergyPlusData &state);
387 :
388 : void calculateTwoSpeedTower(EnergyPlusData &state);
389 :
390 : void calculateMerkelVariableSpeedTower(EnergyPlusData &state, Real64 &MyLoad);
391 :
392 : void calculateVariableSpeedTower(EnergyPlusData &state);
393 :
394 : Real64 calculateSimpleTowerOutletTemp(EnergyPlusData &state, Real64 waterMassFlowRate, Real64 AirFlowRate, Real64 UAdesign);
395 :
396 : Real64 calculateVariableTowerOutletTemp(EnergyPlusData &state,
397 : Real64 WaterFlowRateRatio, // current water flow rate ratio (capped if applicable)
398 : Real64 airFlowRateRatioLocal, // current air flow rate ratio
399 : Real64 Twb // current inlet air wet-bulb temperature (C, capped if applicable)
400 : );
401 :
402 : void calculateWaterUsage(EnergyPlusData &state);
403 :
404 : Real64 calculateVariableSpeedApproach(EnergyPlusData &state,
405 : Real64 PctWaterFlow, // Water flow ratio of cooling tower
406 : Real64 airFlowRatioLocal, // Air flow ratio of cooling tower
407 : Real64 Twb, // Inlet air wet-bulb temperature [C]
408 : Real64 Tr // Cooling tower range (outlet water temp minus inlet air wet-bulb temp) [C]
409 : );
410 :
411 : void checkModelBounds(EnergyPlusData &state,
412 : Real64 Twb, // current inlet air wet-bulb temperature (C)
413 : Real64 Tr, // requested range temperature for current time step (C)
414 : Real64 Ta, // requested approach temperature for current time step (C)
415 : Real64 WaterFlowRateRatio, // current water flow rate ratio at water inlet node
416 : Real64 &TwbCapped, // bounded value of inlet air wet-bulb temperature (C)
417 : Real64 &TrCapped, // bounded value of range temperature (C)
418 : Real64 &TaCapped, // bounded value of approach temperature (C)
419 : Real64 &WaterFlowRateRatioCapped // bounded value of water flow rate ratio
420 : );
421 :
422 : void update(EnergyPlusData &state);
423 :
424 : void report(EnergyPlusData &state, bool RunFlag);
425 :
426 : static PlantComponent *factory(EnergyPlusData &state, std::string_view objectName);
427 : };
428 :
429 : void GetTowerInput(EnergyPlusData &state);
430 :
431 : } // namespace CondenserLoopTowers
432 :
433 1542 : struct CondenserLoopTowersData : BaseGlobalStruct
434 : {
435 : bool GetInput = true;
436 : Array1D<CondenserLoopTowers::CoolingTower> towers; // dimension to number of machines
437 :
438 0 : void clear_state() override
439 : {
440 0 : *this = CondenserLoopTowersData();
441 0 : }
442 : };
443 :
444 : } // namespace EnergyPlus
445 :
446 : #endif
|
