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47 :
48 : // C++ Headers
49 : #include <cmath>
50 :
51 : // ObjexxFCL Headers
52 : #include <ObjexxFCL/string.functions.hh>
53 :
54 : // EnergyPlus Headers
55 : #include <EnergyPlus/BranchNodeConnections.hh>
56 : #include <EnergyPlus/Data/EnergyPlusData.hh>
57 : #include <EnergyPlus/DataBranchAirLoopPlant.hh>
58 : #include <EnergyPlus/DataHVACGlobals.hh>
59 : #include <EnergyPlus/DataLoopNode.hh>
60 : #include <EnergyPlus/FluidProperties.hh>
61 : #include <EnergyPlus/General.hh>
62 : #include <EnergyPlus/HeatPumpWaterToWaterCOOLING.hh>
63 : #include <EnergyPlus/InputProcessing/InputProcessor.hh>
64 : #include <EnergyPlus/NodeInputManager.hh>
65 : #include <EnergyPlus/OutputProcessor.hh>
66 : #include <EnergyPlus/Plant/DataPlant.hh>
67 : #include <EnergyPlus/Plant/PlantLocation.hh>
68 : #include <EnergyPlus/PlantUtilities.hh>
69 : #include <EnergyPlus/UtilityRoutines.hh>
70 :
71 : namespace EnergyPlus::HeatPumpWaterToWaterCOOLING {
72 : // Module containing the routines dealing with the Water to Water Heat Pump (Cooling)
73 :
74 : // MODULE INFORMATION:
75 : // AUTHOR ARUN
76 : // DATE WRITTEN 7/18/2000
77 : // MODIFIED ARUN: 6/27/2002: Cycle Time
78 : // L Lawrie: V1.1.1 (5/20/2003) add meters and energy to several reporting variables
79 : // L Lawrie: V1.1.1 (5/20/2003) restructure modules to comply with standard templates
80 : // B Griffith, Sept 2010, plant upgrades, general fluid properties
81 :
82 : // PURPOSE OF THIS MODULE:
83 : // This module simulates a water to Water Heat Pump (Cooling)
84 :
85 : // METHODOLOGY EMPLOYED:
86 : // This simulation is based on a set of selected parameters,
87 : // Which are obtained using Parameter Estimation technique.
88 :
89 : // MODULE PARAMETER DEFINITIONS
90 : std::string const ModuleCompName("HeatPump:WaterToWater:ParameterEstimation:Cooling");
91 : std::string const ModuleCompNameUC("HEATPUMP:WATERTOWATER:PARAMETERESTIMATION:COOLING");
92 : std::string const GSHPRefrigerant("R22"); // refrigerant name and index
93 :
94 0 : GshpPeCoolingSpecs *GshpPeCoolingSpecs::factory(EnergyPlusData &state, const std::string &objectName)
95 : {
96 0 : if (state.dataHPWaterToWaterClg->GetWWHPCoolingInput) {
97 0 : GetGshpInput(state);
98 0 : state.dataHPWaterToWaterClg->GetWWHPCoolingInput = false;
99 : }
100 0 : auto thisObj = std::find_if(state.dataHPWaterToWaterClg->GSHP.begin(),
101 0 : state.dataHPWaterToWaterClg->GSHP.end(),
102 0 : [&objectName](const GshpPeCoolingSpecs &myObj) { return myObj.Name == objectName; });
103 0 : if (thisObj != state.dataHPWaterToWaterClg->GSHP.end()) {
104 0 : return thisObj;
105 : }
106 : // If we didn't find it, fatal
107 : ShowFatalError(state, format("WWHPCoolingFactory: Error getting inputs for heat pump named: {}", objectName)); // LCOV_EXCL_LINE
108 : // Shut up the compiler
109 : return nullptr; // LCOV_EXCL_LINE
110 : }
111 :
112 0 : void GshpPeCoolingSpecs::simulate(
113 : EnergyPlusData &state, const PlantLocation &calledFromLocation, bool FirstHVACIteration, Real64 &CurLoad, [[maybe_unused]] bool RunFlag)
114 : {
115 : // Simulate the model for the Demand "MyLoad"
116 0 : if (calledFromLocation.loopNum == this->LoadPlantLoc.loopNum) { // chilled water loop
117 0 : this->initialize(state);
118 0 : this->calculate(state, CurLoad);
119 0 : this->update(state);
120 0 : } else if (calledFromLocation.loopNum == this->SourcePlantLoc.loopNum) { // condenser loop
121 0 : PlantUtilities::UpdateChillerComponentCondenserSide(state,
122 : this->SourcePlantLoc.loopNum,
123 : this->SourcePlantLoc.loopSideNum,
124 : DataPlant::PlantEquipmentType::HPWaterEFCooling,
125 : this->SourceSideInletNodeNum,
126 : this->SourceSideOutletNodeNum,
127 : this->QSource,
128 : this->SourceSideWaterInletTemp,
129 : this->SourceSideWaterOutletTemp,
130 : this->SourceSideWaterMassFlowRate,
131 : FirstHVACIteration);
132 : } else {
133 0 : ShowFatalError(state, format("SimHPWatertoWaterCOOLING:: Invalid loop connection {}, Requested Unit={}", ModuleCompName, this->Name));
134 : }
135 0 : }
136 :
137 0 : void GshpPeCoolingSpecs::getDesignCapacities([[maybe_unused]] EnergyPlusData &state,
138 : [[maybe_unused]] const PlantLocation &calledFromLocation,
139 : Real64 &MaxLoad,
140 : Real64 &MinLoad,
141 : Real64 &OptLoad)
142 : {
143 0 : MinLoad = this->NomCap * this->MinPartLoadRat;
144 0 : MaxLoad = this->NomCap * this->MaxPartLoadRat;
145 0 : OptLoad = this->NomCap * this->OptPartLoadRat;
146 0 : }
147 :
148 0 : void GshpPeCoolingSpecs::onInitLoopEquip(EnergyPlusData &state, [[maybe_unused]] const PlantLocation &calledFromLocation)
149 : {
150 0 : if (this->plantScanFlag) {
151 : // Locate the heating on the plant loops for later usage
152 0 : bool errFlag = false;
153 0 : PlantUtilities::ScanPlantLoopsForObject(state,
154 : this->Name,
155 : DataPlant::PlantEquipmentType::HPWaterPECooling,
156 0 : this->SourcePlantLoc,
157 : errFlag,
158 : _,
159 : _,
160 : _,
161 0 : this->SourceSideInletNodeNum,
162 : _);
163 0 : PlantUtilities::ScanPlantLoopsForObject(
164 0 : state, this->Name, DataPlant::PlantEquipmentType::HPWaterPECooling, this->LoadPlantLoc, errFlag, _, _, _, this->LoadSideInletNodeNum, _);
165 0 : if (errFlag) {
166 0 : ShowFatalError(state, "InitGshp: Program terminated due to previous condition(s).");
167 : }
168 :
169 0 : PlantUtilities::InterConnectTwoPlantLoopSides(state, this->LoadPlantLoc, this->SourcePlantLoc, this->WWHPPlantTypeOfNum, true);
170 0 : this->plantScanFlag = false;
171 : }
172 0 : }
173 :
174 0 : void GetGshpInput(EnergyPlusData &state)
175 : {
176 : // SUBROUTINE INFORMATION:
177 : // DATE WRITTEN: April 1998
178 :
179 : // PURPOSE OF THIS SUBROUTINE:
180 : // This routine will get the input
181 : // required by the GSHP models. As such
182 : // it will interact with the Input Scanner to retrieve
183 : // information from the input file, count the number of
184 : // GSHPs and begin to fill the
185 : // arrays associated with the typeGSHP.
186 : static constexpr std::string_view routineName = "GetGshpInput";
187 :
188 : // SUBROUTINE LOCAL VARIABLE DECLARATIONS:
189 : int GSHPNum; // Gshp counter
190 : int NumAlphas; // Number of elements in the alpha array
191 : int NumNums; // Number of elements in the numeric array
192 : int IOStat; // IO Status when calling get input subroutine
193 0 : Array1D_string AlphArray(5); // character string data
194 0 : Array1D<Real64> NumArray(23); // numeric data
195 :
196 0 : bool ErrorsFound(false);
197 :
198 0 : state.dataHPWaterToWaterClg->NumGSHPs = state.dataInputProcessing->inputProcessor->getNumObjectsFound(state, ModuleCompNameUC);
199 :
200 0 : if (state.dataHPWaterToWaterClg->NumGSHPs <= 0) {
201 0 : ShowSevereError(state, "No Equipment found in SimGshp");
202 0 : ErrorsFound = true;
203 : }
204 :
205 : // Allocate Arrays
206 0 : state.dataHPWaterToWaterClg->GSHP.allocate(state.dataHPWaterToWaterClg->NumGSHPs);
207 :
208 0 : for (GSHPNum = 1; GSHPNum <= state.dataHPWaterToWaterClg->NumGSHPs; ++GSHPNum) {
209 0 : auto &thisGSHP = state.dataHPWaterToWaterClg->GSHP(GSHPNum);
210 0 : state.dataInputProcessing->inputProcessor->getObjectItem(state, ModuleCompNameUC, GSHPNum, AlphArray, NumAlphas, NumArray, NumNums, IOStat);
211 :
212 0 : ErrorObjectHeader eoh{routineName, ModuleCompNameUC, AlphArray(1)};
213 :
214 0 : thisGSHP.Name = AlphArray(1);
215 :
216 0 : thisGSHP.WWHPPlantTypeOfNum = DataPlant::PlantEquipmentType::HPWaterPECooling;
217 :
218 0 : thisGSHP.COP = NumArray(1);
219 0 : if (NumArray(1) == 0.0) {
220 0 : ShowSevereError(state, format("{}:COP = 0.0, Heatpump={}", ModuleCompName, thisGSHP.Name));
221 0 : ErrorsFound = true;
222 : }
223 :
224 : // zero values for NumArray 0 - 6 checked in input - idd
225 :
226 0 : thisGSHP.NomCap = NumArray(2);
227 :
228 0 : thisGSHP.MinPartLoadRat = NumArray(3);
229 :
230 0 : thisGSHP.MaxPartLoadRat = NumArray(4);
231 :
232 0 : thisGSHP.OptPartLoadRat = NumArray(5);
233 :
234 0 : thisGSHP.LoadSideVolFlowRate = NumArray(6);
235 0 : if (NumArray(6) == 0.0) {
236 0 : ShowSevereError(state, format("{}:Load Side Vol Flow Rate = 0.0, Heatpump={}", ModuleCompName, thisGSHP.Name));
237 0 : ErrorsFound = true;
238 : }
239 :
240 0 : thisGSHP.SourceSideVolFlowRate = NumArray(7);
241 0 : if (NumArray(7) == 0.0) {
242 0 : ShowSevereError(state, format("{}:Source Side Vol Flow Rate = 0.0, Heatpump={}", ModuleCompName, thisGSHP.Name));
243 0 : ErrorsFound = true;
244 : }
245 :
246 0 : thisGSHP.LoadSideUACoeff = NumArray(8);
247 0 : if (NumArray(9) == 0.0) {
248 0 : ShowSevereError(state, format("{}:Load Side Heat Transfer Coefficient = 0.0, Heatpump={}", ModuleCompName, thisGSHP.Name));
249 0 : ErrorsFound = true;
250 : }
251 :
252 0 : thisGSHP.SourceSideUACoeff = NumArray(9);
253 0 : if (NumArray(8) == 0.0) {
254 0 : ShowSevereError(state, format("{}:Source Side Heat Transfer Coefficient = 0.0, Heatpump={}", ModuleCompName, thisGSHP.Name));
255 0 : ErrorsFound = true;
256 : }
257 :
258 0 : thisGSHP.CompPistonDisp = NumArray(10);
259 0 : if (NumArray(10) == 0.0) {
260 0 : ShowSevereError(state, format("{}:Compressor Piston displacement/Stroke = 0.0, Heatpump={}", ModuleCompName, thisGSHP.Name));
261 0 : ErrorsFound = true;
262 : }
263 :
264 0 : thisGSHP.CompClearanceFactor = NumArray(11);
265 0 : if (NumArray(11) == 0.0) {
266 0 : ShowSevereError(state, format("{}:Compressor Clearance Factor = 0.0, Heatpump={}", ModuleCompName, thisGSHP.Name));
267 0 : ErrorsFound = true;
268 : }
269 :
270 0 : thisGSHP.CompSucPressDrop = NumArray(12);
271 0 : if (NumArray(12) == 0.0) {
272 0 : ShowSevereError(state, format("{}: Pressure Drop = 0.0, Heatpump={}", ModuleCompName, thisGSHP.Name));
273 0 : ErrorsFound = true;
274 : }
275 :
276 0 : thisGSHP.SuperheatTemp = NumArray(13);
277 0 : if (NumArray(13) == 0.0) {
278 0 : ShowSevereError(state, format("{}:Source Side SuperHeat = 0.0, Heatpump={}", ModuleCompName, thisGSHP.Name));
279 0 : ErrorsFound = true;
280 : }
281 :
282 0 : thisGSHP.PowerLosses = NumArray(14);
283 0 : if (NumArray(14) == 0.0) {
284 0 : ShowSevereError(state, format("{}:Compressor Power Loss = 0.0, Heatpump={}", ModuleCompName, thisGSHP.Name));
285 0 : ErrorsFound = true;
286 : }
287 0 : thisGSHP.LossFactor = NumArray(15);
288 0 : if (NumArray(15) == 0.0) {
289 0 : ShowSevereError(state, format("{}:Efficiency = 0.0, Heatpump={}", ModuleCompName, thisGSHP.Name));
290 0 : ErrorsFound = true;
291 : }
292 :
293 0 : thisGSHP.HighPressCutoff = NumArray(16);
294 0 : if (NumArray(16) == 0.0) {
295 0 : thisGSHP.HighPressCutoff = 500000000.0;
296 : }
297 :
298 0 : thisGSHP.LowPressCutoff = NumArray(17);
299 0 : if (NumArray(17) == 0.0) {
300 0 : thisGSHP.LowPressCutoff = 0.0;
301 : }
302 :
303 0 : thisGSHP.SourceSideInletNodeNum = GetOnlySingleNode(state,
304 0 : AlphArray(2),
305 : ErrorsFound,
306 : DataLoopNode::ConnectionObjectType::HeatPumpWaterToWaterParameterEstimationCooling,
307 0 : thisGSHP.Name,
308 : DataLoopNode::NodeFluidType::Water,
309 : DataLoopNode::ConnectionType::Inlet,
310 : NodeInputManager::CompFluidStream::Primary,
311 : DataLoopNode::ObjectIsNotParent);
312 :
313 0 : thisGSHP.SourceSideOutletNodeNum = GetOnlySingleNode(state,
314 0 : AlphArray(3),
315 : ErrorsFound,
316 : DataLoopNode::ConnectionObjectType::HeatPumpWaterToWaterParameterEstimationCooling,
317 0 : thisGSHP.Name,
318 : DataLoopNode::NodeFluidType::Water,
319 : DataLoopNode::ConnectionType::Outlet,
320 : NodeInputManager::CompFluidStream::Primary,
321 : DataLoopNode::ObjectIsNotParent);
322 :
323 0 : thisGSHP.LoadSideInletNodeNum = GetOnlySingleNode(state,
324 0 : AlphArray(4),
325 : ErrorsFound,
326 : DataLoopNode::ConnectionObjectType::HeatPumpWaterToWaterParameterEstimationCooling,
327 0 : thisGSHP.Name,
328 : DataLoopNode::NodeFluidType::Water,
329 : DataLoopNode::ConnectionType::Inlet,
330 : NodeInputManager::CompFluidStream::Secondary,
331 : DataLoopNode::ObjectIsNotParent);
332 :
333 0 : thisGSHP.LoadSideOutletNodeNum = GetOnlySingleNode(state,
334 0 : AlphArray(5),
335 : ErrorsFound,
336 : DataLoopNode::ConnectionObjectType::HeatPumpWaterToWaterParameterEstimationCooling,
337 0 : thisGSHP.Name,
338 : DataLoopNode::NodeFluidType::Water,
339 : DataLoopNode::ConnectionType::Outlet,
340 : NodeInputManager::CompFluidStream::Secondary,
341 : DataLoopNode::ObjectIsNotParent);
342 :
343 : // Test node sets
344 0 : BranchNodeConnections::TestCompSet(state, ModuleCompNameUC, thisGSHP.Name, AlphArray(2), AlphArray(3), "Condenser Water Nodes");
345 0 : BranchNodeConnections::TestCompSet(state, ModuleCompNameUC, thisGSHP.Name, AlphArray(4), AlphArray(5), "Chilled Water Nodes");
346 :
347 : // save the design source side flow rate for use by plant loop sizing algorithms
348 0 : PlantUtilities::RegisterPlantCompDesignFlow(state, thisGSHP.SourceSideInletNodeNum, 0.5 * thisGSHP.SourceSideVolFlowRate);
349 :
350 0 : thisGSHP.QLoad = 0.0;
351 0 : thisGSHP.QSource = 0.0;
352 0 : thisGSHP.Power = 0.0;
353 0 : thisGSHP.LoadSideWaterInletTemp = 0.0;
354 0 : thisGSHP.SourceSideWaterInletTemp = 0.0;
355 0 : thisGSHP.LoadSideWaterOutletTemp = 0.0;
356 0 : thisGSHP.SourceSideWaterOutletTemp = 0.0;
357 0 : thisGSHP.SourceSideWaterMassFlowRate = 0.0;
358 0 : thisGSHP.LoadSideWaterMassFlowRate = 0.0;
359 0 : thisGSHP.IsOn = false;
360 0 : thisGSHP.MustRun = true;
361 :
362 0 : if ((thisGSHP.refrig = Fluid::GetRefrig(state, GSHPRefrigerant)) == nullptr) {
363 0 : ShowSevereItemNotFound(state, eoh, "Refrigerant", GSHPRefrigerant);
364 0 : ErrorsFound = true;
365 : }
366 : }
367 :
368 0 : if (ErrorsFound) {
369 0 : ShowFatalError(state, "Errors Found in getting Gshp input");
370 : }
371 :
372 : // CurrentModuleObject='HeatPump:WaterToWater:ParameterEstimation:Cooling'
373 0 : for (GSHPNum = 1; GSHPNum <= state.dataHPWaterToWaterClg->NumGSHPs; ++GSHPNum) {
374 0 : auto &thisGSHP = state.dataHPWaterToWaterClg->GSHP(GSHPNum);
375 0 : SetupOutputVariable(state,
376 : "Heat Pump Electricity Rate",
377 : Constant::Units::W,
378 0 : thisGSHP.Power,
379 : OutputProcessor::TimeStepType::System,
380 : OutputProcessor::StoreType::Average,
381 0 : thisGSHP.Name);
382 0 : SetupOutputVariable(state,
383 : "Heat Pump Electricity Energy",
384 : Constant::Units::J,
385 0 : thisGSHP.Energy,
386 : OutputProcessor::TimeStepType::System,
387 : OutputProcessor::StoreType::Sum,
388 0 : thisGSHP.Name,
389 : Constant::eResource::Electricity,
390 : OutputProcessor::Group::Plant,
391 : OutputProcessor::EndUseCat::Cooling);
392 :
393 0 : SetupOutputVariable(state,
394 : "Heat Pump Load Side Heat Transfer Rate",
395 : Constant::Units::W,
396 0 : thisGSHP.QLoad,
397 : OutputProcessor::TimeStepType::System,
398 : OutputProcessor::StoreType::Average,
399 0 : thisGSHP.Name);
400 0 : SetupOutputVariable(state,
401 : "Heat Pump Load Side Heat Transfer Energy",
402 : Constant::Units::J,
403 0 : thisGSHP.QLoadEnergy,
404 : OutputProcessor::TimeStepType::System,
405 : OutputProcessor::StoreType::Sum,
406 0 : thisGSHP.Name);
407 :
408 0 : SetupOutputVariable(state,
409 : "Heat Pump Source Side Heat Transfer Rate",
410 : Constant::Units::W,
411 0 : thisGSHP.QSource,
412 : OutputProcessor::TimeStepType::System,
413 : OutputProcessor::StoreType::Average,
414 0 : thisGSHP.Name);
415 0 : SetupOutputVariable(state,
416 : "Heat Pump Source Side Heat Transfer Energy",
417 : Constant::Units::J,
418 0 : thisGSHP.QSourceEnergy,
419 : OutputProcessor::TimeStepType::System,
420 : OutputProcessor::StoreType::Sum,
421 0 : thisGSHP.Name);
422 :
423 0 : SetupOutputVariable(state,
424 : "Heat Pump Load Side Outlet Temperature",
425 : Constant::Units::C,
426 0 : thisGSHP.LoadSideWaterOutletTemp,
427 : OutputProcessor::TimeStepType::System,
428 : OutputProcessor::StoreType::Average,
429 0 : thisGSHP.Name);
430 0 : SetupOutputVariable(state,
431 : "Heat Pump Load Side Inlet Temperature",
432 : Constant::Units::C,
433 0 : thisGSHP.LoadSideWaterInletTemp,
434 : OutputProcessor::TimeStepType::System,
435 : OutputProcessor::StoreType::Average,
436 0 : thisGSHP.Name);
437 0 : SetupOutputVariable(state,
438 : "Heat Pump Source Side Outlet Temperature",
439 : Constant::Units::C,
440 0 : thisGSHP.SourceSideWaterOutletTemp,
441 : OutputProcessor::TimeStepType::System,
442 : OutputProcessor::StoreType::Average,
443 0 : thisGSHP.Name);
444 0 : SetupOutputVariable(state,
445 : "Heat Pump Source Side Inlet Temperature",
446 : Constant::Units::C,
447 0 : thisGSHP.SourceSideWaterInletTemp,
448 : OutputProcessor::TimeStepType::System,
449 : OutputProcessor::StoreType::Average,
450 0 : thisGSHP.Name);
451 0 : SetupOutputVariable(state,
452 : "Heat Pump Load Side Mass Flow Rate",
453 : Constant::Units::kg_s,
454 0 : thisGSHP.LoadSideWaterMassFlowRate,
455 : OutputProcessor::TimeStepType::System,
456 : OutputProcessor::StoreType::Average,
457 0 : thisGSHP.Name);
458 0 : SetupOutputVariable(state,
459 : "Heat Pump Source Side Mass Flow Rate",
460 : Constant::Units::kg_s,
461 0 : thisGSHP.SourceSideWaterMassFlowRate,
462 : OutputProcessor::TimeStepType::System,
463 : OutputProcessor::StoreType::Average,
464 0 : thisGSHP.Name);
465 : }
466 0 : }
467 :
468 0 : void GshpPeCoolingSpecs::initialize(EnergyPlusData &state)
469 : {
470 :
471 : // SUBROUTINE INFORMATION:
472 : // AUTHOR: Dan Fisher
473 : // DATE WRITTEN: July 2007
474 :
475 : // SUBROUTINE PARAMETER DEFINITIONS:
476 : static constexpr std::string_view RoutineName("InitGshp");
477 :
478 : // For each new environment
479 0 : if (state.dataGlobal->BeginEnvrnFlag && this->beginEnvironFlag) {
480 0 : this->QLoad = 0.0;
481 0 : this->QSource = 0.0;
482 0 : this->Power = 0.0;
483 0 : this->QLoadEnergy = 0.0;
484 0 : this->QSourceEnergy = 0.0;
485 0 : this->Energy = 0.0;
486 0 : this->LoadSideWaterInletTemp = 0.0;
487 0 : this->SourceSideWaterInletTemp = 0.0;
488 0 : this->LoadSideWaterOutletTemp = 0.0;
489 0 : this->SourceSideWaterOutletTemp = 0.0;
490 0 : this->SourceSideWaterMassFlowRate = 0.0;
491 0 : this->LoadSideWaterMassFlowRate = 0.0;
492 0 : this->IsOn = false;
493 0 : this->MustRun = true;
494 :
495 0 : this->beginEnvironFlag = false;
496 0 : Real64 rho = state.dataPlnt->PlantLoop(this->LoadPlantLoc.loopNum).glycol->getDensity(state, Constant::CWInitConvTemp, RoutineName);
497 0 : this->LoadSideDesignMassFlow = this->LoadSideVolFlowRate * rho;
498 :
499 0 : PlantUtilities::InitComponentNodes(state, 0.0, this->LoadSideDesignMassFlow, this->LoadSideInletNodeNum, this->LoadSideOutletNodeNum);
500 :
501 0 : rho = state.dataPlnt->PlantLoop(this->SourcePlantLoc.loopNum).glycol->getDensity(state, Constant::CWInitConvTemp, RoutineName);
502 0 : this->SourceSideDesignMassFlow = this->SourceSideVolFlowRate * rho;
503 :
504 0 : PlantUtilities::InitComponentNodes(state, 0.0, this->SourceSideDesignMassFlow, this->SourceSideInletNodeNum, this->SourceSideOutletNodeNum);
505 :
506 0 : state.dataLoopNodes->Node(this->SourceSideInletNodeNum).Temp = 35.0;
507 : }
508 :
509 0 : if (!state.dataGlobal->BeginEnvrnFlag) {
510 0 : this->beginEnvironFlag = true;
511 : }
512 :
513 : // Init more variables
514 :
515 : // On every call
516 0 : this->Running = 0;
517 :
518 0 : this->MustRun = true; // Reset MustRun Flag to TRUE
519 :
520 0 : this->LoadSideWaterMassFlowRate = 0.0; // Load Side mass flow rate, water side
521 0 : this->SourceSideWaterMassFlowRate = 0.0; // Source Side mass flow rate, water side
522 0 : this->Power = 0.0; // power consumption
523 0 : this->QLoad = 0.0; // heat rejection from Load Side coil
524 0 : this->QSource = 0.0;
525 0 : }
526 :
527 0 : void GshpPeCoolingSpecs::calculate(EnergyPlusData &state, Real64 &MyLoad)
528 : {
529 : // SUBROUTINE INFORMATION:
530 : // DATE WRITTEN Sept. 1998
531 : // MODIFIED April 1999
532 : // September 2002, SJR
533 : // RE-ENGINEERED Mar2000
534 :
535 : // SUBROUTINE PARAMETER DEFINITIONS:
536 0 : Real64 constexpr gamma(1.114); // Expnasion Coefficient
537 0 : Real64 constexpr HeatBalTol(0.0005);
538 0 : Real64 constexpr RelaxParam(0.6);
539 0 : Real64 constexpr SmallNum(1.0e-20);
540 0 : int constexpr IterationLimit(500);
541 : static constexpr std::string_view RoutineName("CalcGshpModel");
542 : static constexpr std::string_view RoutineNameLoadSideRefridgTemp("CalcGSHPModel:LoadSideRefridgTemp");
543 : static constexpr std::string_view RoutineNameSourceSideRefridgTemp("CalcGSHPModel:SourceSideRefridgTemp");
544 : static constexpr std::string_view RoutineNameCompressInletTemp("CalcGSHPModel:CompressInletTemp");
545 : static constexpr std::string_view RoutineNameSuctionPr("CalcGSHPModel:SuctionPr");
546 : static constexpr std::string_view RoutineNameCompSuctionTemp("CalcGSHPModel:CompSuctionTemp");
547 :
548 : // SUBROUTINE LOCAL VARIABLE DECLARATIONS:
549 : Real64 SourceSideEffect; // Source Side effectiveness
550 : Real64 LoadSideEffect; // Load Side effectiveness
551 : Real64 SourceSideRefridgTemp; // Source Side temperature
552 : Real64 LoadSideRefridgTemp; // Load Side temperature
553 : Real64 SourceSidePressure; // Source Side pressure
554 : Real64 LoadSidePressure; // Load Side pressure
555 : Real64 SuctionPr; // Suction Pressure
556 : Real64 DischargePr; // Discharge Pressure
557 : Real64 CompressInletTemp; // Compressor inlet temperature
558 : Real64 MassRef; // mass flow rate of refrigerant
559 : Real64 SourceSideOutletEnth; // Enthalpy at Source Side pressure
560 : Real64 LoadSideOutletEnth; // Enthalpy at Condenser Pressure
561 : Real64 initialQSource; // Guess Source Side Heat rate
562 : Real64 initialQLoad; // Guess Load Side Heat rate
563 : Real64 qual; // quality
564 : Real64 SuperHeatEnth;
565 : Real64 T110;
566 : Real64 T111;
567 : Real64 CompSuctionTemp;
568 : Real64 CompSuctionEnth;
569 : Real64 CompSuctionDensity;
570 : Real64 CompSuctionSatTemp;
571 : Real64 DutyFactor;
572 : int IterationCount;
573 :
574 : Real64 CpSourceSide; // local temporary for fluid specific heat
575 : Real64 CpLoadSide; // local temporary for fluid specific heat
576 :
577 0 : if (MyLoad < 0.0) {
578 0 : this->MustRun = true;
579 0 : this->IsOn = true;
580 : } else {
581 0 : this->MustRun = false;
582 0 : this->IsOn = false;
583 : }
584 :
585 : //*******Set flow based on "flowlock" and "run" flags**********
586 : // Set flows if the heat pump is not running
587 0 : if (!this->MustRun) {
588 0 : this->LoadSideWaterMassFlowRate = 0.0;
589 0 : PlantUtilities::SetComponentFlowRate(
590 0 : state, this->LoadSideWaterMassFlowRate, this->LoadSideInletNodeNum, this->LoadSideOutletNodeNum, this->LoadPlantLoc);
591 0 : this->SourceSideWaterMassFlowRate = 0.0;
592 0 : PlantUtilities::SetComponentFlowRate(
593 0 : state, this->SourceSideWaterMassFlowRate, this->SourceSideInletNodeNum, this->SourceSideOutletNodeNum, this->SourcePlantLoc);
594 0 : PlantUtilities::PullCompInterconnectTrigger(state,
595 0 : this->LoadPlantLoc,
596 0 : this->CondMassFlowIndex,
597 0 : this->SourcePlantLoc,
598 : DataPlant::CriteriaType::MassFlowRate,
599 : this->SourceSideWaterMassFlowRate);
600 : // now initialize simulation variables for "heat pump off"
601 0 : this->QLoad = 0.0;
602 0 : this->QSource = 0.0;
603 0 : this->Power = 0.0;
604 0 : this->LoadSideWaterInletTemp = state.dataLoopNodes->Node(this->LoadSideInletNodeNum).Temp;
605 0 : this->LoadSideWaterOutletTemp = LoadSideWaterInletTemp;
606 0 : this->SourceSideWaterInletTemp = state.dataLoopNodes->Node(this->SourceSideInletNodeNum).Temp;
607 0 : this->SourceSideWaterOutletTemp = SourceSideWaterInletTemp;
608 0 : return; // if heat pump is not running return without simulation
609 :
610 : // Set flows if the heat pump is running
611 : } else { // the heat pump must run
612 0 : this->LoadSideWaterMassFlowRate = this->LoadSideDesignMassFlow;
613 0 : PlantUtilities::SetComponentFlowRate(
614 0 : state, this->LoadSideWaterMassFlowRate, this->LoadSideInletNodeNum, this->LoadSideOutletNodeNum, this->LoadPlantLoc);
615 :
616 0 : this->SourceSideWaterMassFlowRate = this->SourceSideDesignMassFlow;
617 0 : PlantUtilities::SetComponentFlowRate(
618 0 : state, this->SourceSideWaterMassFlowRate, this->SourceSideInletNodeNum, this->SourceSideOutletNodeNum, this->SourcePlantLoc);
619 : // get inlet temps
620 0 : this->LoadSideWaterInletTemp = state.dataLoopNodes->Node(this->LoadSideInletNodeNum).Temp;
621 0 : this->SourceSideWaterInletTemp = state.dataLoopNodes->Node(this->SourceSideInletNodeNum).Temp;
622 : // if there's no flow, turn the "heat pump off"
623 0 : if (this->LoadSideWaterMassFlowRate < DataBranchAirLoopPlant::MassFlowTolerance ||
624 0 : this->SourceSideWaterMassFlowRate < DataBranchAirLoopPlant::MassFlowTolerance) {
625 0 : this->LoadSideWaterMassFlowRate = 0.0;
626 0 : PlantUtilities::SetComponentFlowRate(
627 0 : state, this->LoadSideWaterMassFlowRate, this->LoadSideInletNodeNum, this->LoadSideOutletNodeNum, this->LoadPlantLoc);
628 0 : this->SourceSideWaterMassFlowRate = 0.0;
629 0 : PlantUtilities::SetComponentFlowRate(
630 0 : state, this->SourceSideWaterMassFlowRate, this->SourceSideInletNodeNum, this->SourceSideOutletNodeNum, this->SourcePlantLoc);
631 0 : PlantUtilities::PullCompInterconnectTrigger(state,
632 0 : this->LoadPlantLoc,
633 0 : this->CondMassFlowIndex,
634 0 : this->SourcePlantLoc,
635 : DataPlant::CriteriaType::MassFlowRate,
636 : this->SourceSideWaterMassFlowRate);
637 0 : this->QLoad = 0.0;
638 0 : this->QSource = 0.0;
639 0 : this->Power = 0.0;
640 0 : this->LoadSideWaterInletTemp = state.dataLoopNodes->Node(this->LoadSideInletNodeNum).Temp;
641 0 : this->LoadSideWaterOutletTemp = LoadSideWaterInletTemp;
642 0 : this->SourceSideWaterInletTemp = state.dataLoopNodes->Node(this->SourceSideInletNodeNum).Temp;
643 0 : this->SourceSideWaterOutletTemp = SourceSideWaterInletTemp;
644 0 : return;
645 : }
646 0 : PlantUtilities::PullCompInterconnectTrigger(state,
647 0 : this->LoadPlantLoc,
648 0 : this->CondMassFlowIndex,
649 0 : this->SourcePlantLoc,
650 : DataPlant::CriteriaType::MassFlowRate,
651 : this->SourceSideWaterMassFlowRate);
652 : }
653 :
654 : //**********BEGIN THE CALCULATION**************
655 :
656 : // initialize the source and load side heat transfer rates for the simulation
657 0 : initialQSource = 0.0;
658 0 : initialQLoad = 0.0;
659 0 : IterationCount = 0;
660 :
661 : CpSourceSide =
662 0 : state.dataPlnt->PlantLoop(this->SourcePlantLoc.loopNum).glycol->getSpecificHeat(state, this->SourceSideWaterInletTemp, RoutineName);
663 :
664 0 : CpLoadSide = state.dataPlnt->PlantLoop(this->LoadPlantLoc.loopNum).glycol->getSpecificHeat(state, this->LoadSideWaterInletTemp, RoutineName);
665 :
666 : // Determine effectiveness of Load Side
667 0 : LoadSideEffect = 1.0 - std::exp(-this->LoadSideUACoeff / (CpLoadSide * this->LoadSideWaterMassFlowRate));
668 : // Determine effectiveness of Source Side
669 0 : SourceSideEffect = 1.0 - std::exp(-this->SourceSideUACoeff / (CpSourceSide * this->SourceSideWaterMassFlowRate));
670 :
671 : // main iteration loop to solve model equations
672 : while (true) {
673 0 : ++IterationCount;
674 :
675 : // To determine Load Side temperature
676 0 : LoadSideRefridgTemp = this->LoadSideWaterInletTemp - initialQLoad / (LoadSideEffect * CpLoadSide * this->LoadSideWaterMassFlowRate);
677 :
678 : // Determine Source Side tempertaure
679 0 : SourceSideRefridgTemp =
680 0 : this->SourceSideWaterInletTemp + initialQSource / (SourceSideEffect * CpSourceSide * this->SourceSideWaterMassFlowRate);
681 :
682 : // Determine the evaporating and condensing pressures
683 0 : SourceSidePressure = this->refrig->getSatPressure(state, SourceSideRefridgTemp, RoutineName);
684 0 : LoadSidePressure = this->refrig->getSatPressure(state, LoadSideRefridgTemp, RoutineName);
685 :
686 0 : if (SourceSidePressure < this->LowPressCutoff) {
687 0 : ShowSevereError(state, format("{}=\"{}\" Cooling Source Side Pressure Less than the Design Minimum", ModuleCompName, this->Name));
688 0 : ShowContinueError(state,
689 0 : format("Cooling Source Side Pressure={:.2T} and user specified Design Minimum Pressure={:.2T}",
690 : SourceSidePressure,
691 0 : this->LowPressCutoff));
692 0 : ShowContinueErrorTimeStamp(state, "");
693 0 : ShowFatalError(state, "Preceding Conditions cause termination.");
694 : }
695 :
696 0 : if (LoadSidePressure > this->HighPressCutoff) {
697 0 : ShowSevereError(state, format("{}=\"{}\" Cooling Load Side Pressure greater than the Design Maximum", ModuleCompName, this->Name));
698 0 : ShowContinueError(state,
699 0 : format("Cooling Load Side Pressure={:.2T} and user specified Design Maximum Pressure={:.2T}",
700 : LoadSidePressure,
701 0 : this->HighPressCutoff));
702 0 : ShowContinueErrorTimeStamp(state, "");
703 0 : ShowFatalError(state, "Preceding Conditions cause termination.");
704 : }
705 : // Determine Suction Pressure at compressor inlet
706 0 : SuctionPr = LoadSidePressure - this->CompSucPressDrop;
707 : // Determine Discharge Pressure at compressor exit
708 0 : DischargePr = SourceSidePressure + this->CompSucPressDrop;
709 :
710 0 : if (SuctionPr < this->LowPressCutoff) {
711 0 : ShowSevereError(state, format("{}=\"{}\" Cooling Suction Pressure Less than the Design Minimum", ModuleCompName, this->Name));
712 0 : ShowContinueError(
713 0 : state, format("Cooling Suction Pressure={:.2T} and user specified Design Minimum Pressure={:.2T}", SuctionPr, this->LowPressCutoff));
714 0 : ShowContinueErrorTimeStamp(state, "");
715 0 : ShowFatalError(state, "Preceding Conditions cause termination.");
716 : }
717 :
718 0 : if (DischargePr > this->HighPressCutoff) {
719 0 : ShowSevereError(state, format("{}=\"{}\" Cooling Discharge Pressure greater than the Design Maximum", ModuleCompName, this->Name));
720 0 : ShowContinueError(
721 : state,
722 0 : format("Cooling Discharge Pressure={:.2T} and user specified Design Maximum Pressure={:.2T}", DischargePr, this->HighPressCutoff));
723 0 : ShowContinueErrorTimeStamp(state, "");
724 0 : ShowFatalError(state, "Preceding Conditions cause termination.");
725 : }
726 :
727 : // Determine the Source Side Outlet Enthalpy
728 :
729 0 : qual = 1.0;
730 0 : LoadSideOutletEnth = this->refrig->getSatEnthalpy(state, LoadSideRefridgTemp, qual, RoutineNameLoadSideRefridgTemp);
731 :
732 0 : qual = 0.0;
733 0 : SourceSideOutletEnth = this->refrig->getSatEnthalpy(state, SourceSideRefridgTemp, qual, RoutineNameSourceSideRefridgTemp);
734 :
735 : // Determine Load Side Outlet Enthalpy
736 : // Determine superheated temperature of the LoadSide outlet/compressor inlet
737 0 : CompressInletTemp = LoadSideRefridgTemp + this->SuperheatTemp;
738 :
739 : // Determine the enathalpy of the super heated fluid at Source Side outlet
740 0 : SuperHeatEnth = this->refrig->getSupHeatEnthalpy(state, CompressInletTemp, LoadSidePressure, RoutineNameCompressInletTemp);
741 :
742 : // Determining the suction state of the fluid from inlet state involves interation
743 : // Method employed...
744 : // Determine the saturated temp at suction pressure, shoot out into the superheated region find the enthalpy
745 : // check that with the inlet enthalpy ( as suction loss is isenthalpic). Iterate till desired accuracy is reached
746 :
747 : // this routine was reenginerred from HVACsim + takes pressure in Pascals, tolrance, refrgerant # R22 =6
748 0 : CompSuctionSatTemp = this->refrig->getSatTemperature(state, SuctionPr, RoutineNameSuctionPr);
749 :
750 0 : T110 = CompSuctionSatTemp;
751 : // Shoot into the super heated region
752 0 : T111 = CompSuctionSatTemp + 100.0;
753 : // Iterate to find the Suction State
754 : while (true) {
755 0 : CompSuctionTemp = 0.5 * (T110 + T111);
756 :
757 0 : CompSuctionEnth = this->refrig->getSupHeatEnthalpy(state, CompSuctionTemp, SuctionPr, RoutineNameCompSuctionTemp);
758 :
759 0 : if (std::abs(CompSuctionEnth - SuperHeatEnth) / SuperHeatEnth < 0.0001) {
760 0 : goto LOOP_exit;
761 : }
762 :
763 0 : if (CompSuctionEnth < SuperHeatEnth) {
764 0 : T110 = CompSuctionTemp;
765 : } else {
766 0 : T111 = CompSuctionTemp;
767 : }
768 : }
769 0 : LOOP_exit:;
770 :
771 : // Determine the Mass flow rate of refrigerant
772 0 : CompSuctionDensity = this->refrig->getSupHeatDensity(state, CompSuctionTemp, SuctionPr, RoutineNameCompSuctionTemp);
773 0 : MassRef = this->CompPistonDisp * CompSuctionDensity *
774 0 : (1 + this->CompClearanceFactor - this->CompClearanceFactor * std::pow(DischargePr / SuctionPr, 1 / gamma));
775 :
776 : // Find the Source Side Heat Transfer
777 :
778 0 : this->QLoad = MassRef * (LoadSideOutletEnth - SourceSideOutletEnth);
779 :
780 : // Determine the theoretical power
781 0 : this->Power = this->PowerLosses + (MassRef * gamma / (gamma - 1) * SuctionPr / CompSuctionDensity / this->LossFactor *
782 0 : (std::pow(DischargePr / SuctionPr, (gamma - 1) / gamma) - 1));
783 :
784 : // Determine the Loadside HeatRate (this->QLoad)
785 0 : this->QSource = this->Power + this->QLoad;
786 : // convergence and iteration limit check
787 0 : if (std::abs((this->QSource - initialQSource) / (initialQSource + SmallNum)) < HeatBalTol || IterationCount > IterationLimit) {
788 0 : if (IterationCount > IterationLimit) {
789 0 : ShowWarningError(state, "HeatPump:WaterToWater:ParameterEstimation, Cooling did not converge");
790 0 : ShowContinueErrorTimeStamp(state, "");
791 0 : ShowContinueError(state, format("Heatpump Name = {}", this->Name));
792 0 : ShowContinueError(
793 : state,
794 0 : format("Heat Inbalance (%) = {}", std::abs(100.0 * (this->QSource - initialQSource) / (initialQSource + SmallNum))));
795 0 : ShowContinueError(state, format("Load-side heat transfer rate = {}", this->QLoad));
796 0 : ShowContinueError(state, format("Source-side heat transfer rate = {}", this->QSource));
797 0 : ShowContinueError(state, format("Source-side mass flow rate = {}", this->SourceSideWaterMassFlowRate));
798 0 : ShowContinueError(state, format("Load-side mass flow rate = {}", this->LoadSideWaterMassFlowRate));
799 0 : ShowContinueError(state, format("Source-side inlet temperature = {}", this->SourceSideWaterInletTemp));
800 0 : ShowContinueError(state, format("Load-side inlet temperature = {}", this->LoadSideWaterInletTemp));
801 : }
802 0 : goto LOOPSourceEnth_exit;
803 :
804 : } else { // update load
805 0 : initialQSource += RelaxParam * (this->QSource - initialQSource);
806 0 : initialQLoad += RelaxParam * (this->QLoad - initialQLoad);
807 : }
808 : }
809 0 : LOOPSourceEnth_exit:;
810 :
811 : // Control Strategy
812 0 : if (std::abs(MyLoad) < this->QLoad) {
813 0 : DutyFactor = std::abs(MyLoad) / this->QLoad;
814 0 : this->QLoad = std::abs(MyLoad);
815 0 : this->Power *= DutyFactor;
816 0 : this->QSource *= DutyFactor;
817 : // Determine the Exterior fluid temperature at the Load Side oulet and evaporator outlet...
818 0 : this->LoadSideWaterOutletTemp = this->LoadSideWaterInletTemp - this->QLoad / (this->LoadSideWaterMassFlowRate * CpLoadSide); // Chilled water
819 0 : this->SourceSideWaterOutletTemp =
820 0 : this->SourceSideWaterInletTemp + this->QSource / (this->SourceSideWaterMassFlowRate * CpSourceSide); // cooling water
821 0 : return;
822 : }
823 :
824 0 : this->LoadSideWaterOutletTemp = this->LoadSideWaterInletTemp - this->QLoad / (this->LoadSideWaterMassFlowRate * CpLoadSide); // Chilled water
825 0 : this->SourceSideWaterOutletTemp = this->SourceSideWaterInletTemp + this->QSource / (this->SourceSideWaterMassFlowRate * CpSourceSide);
826 0 : this->Running = 1;
827 : }
828 :
829 0 : void GshpPeCoolingSpecs::update(EnergyPlusData &state)
830 : {
831 : // SUBROUTINE INFORMATION:
832 : // AUTHOR: Dan Fisher
833 : // DATE WRITTEN: October 1998
834 :
835 0 : if (!this->MustRun) {
836 : // set node temperatures
837 0 : state.dataLoopNodes->Node(this->SourceSideOutletNodeNum).Temp = state.dataLoopNodes->Node(this->SourceSideInletNodeNum).Temp;
838 0 : state.dataLoopNodes->Node(this->LoadSideOutletNodeNum).Temp = state.dataLoopNodes->Node(this->LoadSideInletNodeNum).Temp;
839 0 : this->Power = 0.0;
840 0 : this->Energy = 0.0;
841 0 : this->QSource = 0.0;
842 0 : this->QLoad = 0.0;
843 0 : this->QSourceEnergy = 0.0;
844 0 : this->QLoadEnergy = 0.0;
845 0 : this->SourceSideWaterInletTemp = state.dataLoopNodes->Node(this->SourceSideInletNodeNum).Temp;
846 0 : this->SourceSideWaterOutletTemp = state.dataLoopNodes->Node(this->SourceSideOutletNodeNum).Temp;
847 0 : this->LoadSideWaterInletTemp = state.dataLoopNodes->Node(this->LoadSideInletNodeNum).Temp;
848 0 : this->LoadSideWaterOutletTemp = state.dataLoopNodes->Node(this->LoadSideOutletNodeNum).Temp;
849 :
850 : } else {
851 : // set node temperatures
852 0 : state.dataLoopNodes->Node(this->LoadSideOutletNodeNum).Temp = this->LoadSideWaterOutletTemp;
853 0 : state.dataLoopNodes->Node(this->SourceSideOutletNodeNum).Temp = this->SourceSideWaterOutletTemp;
854 :
855 : // set node flow rates; for these load based models
856 : // assume that the sufficient Source Side flow rate available
857 :
858 0 : Real64 const ReportingConstant = state.dataHVACGlobal->TimeStepSysSec;
859 :
860 0 : this->Energy = this->Power * ReportingConstant;
861 0 : this->QSourceEnergy = QSource * ReportingConstant;
862 0 : this->QLoadEnergy = QLoad * ReportingConstant;
863 0 : this->SourceSideWaterInletTemp = state.dataLoopNodes->Node(this->SourceSideInletNodeNum).Temp;
864 0 : this->LoadSideWaterInletTemp = state.dataLoopNodes->Node(this->LoadSideInletNodeNum).Temp;
865 : }
866 0 : }
867 0 : void GshpPeCoolingSpecs::oneTimeInit([[maybe_unused]] EnergyPlusData &state)
868 : {
869 0 : }
870 0 : void GshpPeCoolingSpecs::oneTimeInit_new([[maybe_unused]] EnergyPlusData &state)
871 : {
872 0 : }
873 :
874 : } // namespace EnergyPlus::HeatPumpWaterToWaterCOOLING
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