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1 : // EnergyPlus, Copyright (c) 1996-2023, The Board of Trustees of the University of Illinois,
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47 :
48 : #ifndef EarthTube_hh_INCLUDED
49 : #define EarthTube_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 : // Forward declarations
62 : struct EnergyPlusData;
63 :
64 : namespace EarthTube {
65 :
66 : // Parameters for Ventilation
67 : enum class Ventilation
68 : {
69 : Invalid = -1,
70 : Natural,
71 : Intake,
72 : Exhaust,
73 : Num
74 : };
75 :
76 3 : struct EarthTubeData
77 : {
78 : int ZonePtr = 0;
79 : int SchedPtr = 0;
80 : Real64 DesignLevel = 0.0;
81 : Real64 MinTemperature = 0.0;
82 : Real64 MaxTemperature = 0.0;
83 : Real64 DelTemperature = 0.0;
84 : Ventilation FanType = Ventilation::Invalid;
85 : Real64 FanPressure = 0.0;
86 : Real64 FanEfficiency = 0.0;
87 : Real64 FanPower = 0.0;
88 : Real64 GroundTempz1z2t = 0.0; // ground temp between z1 and z2 at time t
89 : Real64 InsideAirTemp = 0.0;
90 : Real64 AirTemp = 0.0;
91 : Real64 HumRat = 0.0; // Humidity ratio of air leaving EarthTube and entering zone
92 : Real64 WetBulbTemp = 0.0; // Humidity ratio of air leaving EarthTube and entering zone
93 : Real64 r1 = 0.0; // Inner Pipe Radius (m)
94 : Real64 r2 = 0.0; // Pipe Thickness (m)
95 : Real64 r3 = 0.0; // Distance between Pipe Outer Surface and Undistubed Soil (m)
96 : Real64 PipeLength = 0.0; // Entire Pipe Length
97 : Real64 PipeThermCond = 0.0; // Pipe Thermal Conductivity
98 : Real64 z = 0.0; // Depth under the Ground Surface (m)
99 : Real64 SoilThermDiff = 0.0; // Soil Thermal Diffusivity
100 : Real64 SoilThermCond = 0.0; // Soil Thermal Conductivity
101 : Real64 AverSoilSurTemp = 0.0; // Average Soil Surface Temperature
102 : Real64 ApmlSoilSurTemp = 0.0; // Amplitude of Soil Surface Temperature
103 : int SoilSurPhaseConst = 0; // Phase constant of Soil Surface
104 : Real64 ConstantTermCoef = 0.0;
105 : Real64 TemperatureTermCoef = 0.0;
106 : Real64 VelocityTermCoef = 0.0;
107 : Real64 VelocitySQTermCoef = 0.0;
108 : void CalcEarthTubeHumRat(EnergyPlusData &state, int NZ); // Zone number (index)
109 : };
110 :
111 4709 : struct EarthTubeZoneReportVars
112 : {
113 : // Members
114 : Real64 EarthTubeHeatLoss = 0.0; // [J] Heat loss or cooling to zone from air delivered by earth tube
115 : Real64 EarthTubeHeatLossRate = 0.0; // [W] Heat loss or cooling rate to zone from air delivered by earth tube
116 : Real64 EarthTubeHeatGain = 0.0; // [J] Heat Gain to zone from air delivered by earth tube
117 : Real64 EarthTubeHeatGainRate = 0.0; // [W] Heat Gain rate to zone from air delivered by earth tube
118 : Real64 EarthTubeOATreatmentPower = 0.0; // [W] rate of heat transfer to/from air. positive is heating OA to higher temp
119 : Real64 EarthTubeVolume = 0.0; // Volume of Air {m3} due to EarthTube
120 : Real64 EarthTubeVolFlowRate = 0.0; // Volume flow rate of air (m3/s) due to EarthTube
121 : Real64 EarthTubeVolFlowRateStd = 0.0; // Volume flow rate of air (m3/s) due to EarthTube at standard air conditions
122 : Real64 EarthTubeMass = 0.0; // Mass of Air {kg} due to EarthTube
123 : Real64 EarthTubeMassFlowRate = 0.0; // Mass flow rate of air (kg/s) due to EarthTube
124 : Real64 EarthTubeWaterMassFlowRate = 0.0; // Mass flow rate of water vapor (kg/s) due to EarthTube
125 : Real64 EarthTubeFanElec = 0.0; // [J] Fan Electricity consumed by EarthTube
126 : Real64 EarthTubeFanElecPower = 0.0; // [W] Fan Electric power for EarthTube
127 : Real64 EarthTubeAirTemp = 0.0; // Air Temp {C} of EarthTube, air leaving tube and entering zone
128 : Real64 EarthTubeWetBulbTemp = 0.0; // Wet Bulb Temperature {C} of EarthTube, air leaving tube and entering zone
129 : Real64 EarthTubeHumRat = 0.0; // Humidity Ratio {kg/kg} of EarthTube, air leaving tube and entering zone
130 : };
131 :
132 : void ManageEarthTube(EnergyPlusData &state);
133 :
134 : void GetEarthTube(EnergyPlusData &state, bool &ErrorsFound); // If errors found in input
135 :
136 : void CheckEarthTubesInZones(EnergyPlusData &state,
137 : std::string const &ZoneName, // name of zone for error reporting
138 : std::string_view FieldName, // name of earth tube in input
139 : bool &ErrorsFound // Found a problem
140 : );
141 :
142 : void CalcEarthTube(EnergyPlusData &state);
143 :
144 : void ReportEarthTube(EnergyPlusData &state);
145 :
146 : } // namespace EarthTube
147 :
148 1542 : struct EarthTubeData : BaseGlobalStruct
149 : {
150 : bool GetInputFlag = true;
151 : EPVector<EarthTube::EarthTubeData> EarthTubeSys;
152 : EPVector<EarthTube::EarthTubeZoneReportVars> ZnRptET;
153 :
154 0 : void clear_state() override
155 : {
156 0 : *this = EarthTubeData();
157 0 : }
158 : };
159 :
160 : } // namespace EnergyPlus
161 :
162 : #endif
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