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47 :
48 : #ifndef AIRFLOWNETWORK_PROPERTIES_HPP
49 : #define AIRFLOWNETWORK_PROPERTIES_HPP
50 :
51 : // EnergyPlus Headers
52 : #include <EnergyPlus/Data/BaseData.hh>
53 : #include <EnergyPlus/EnergyPlus.hh>
54 : #include <EnergyPlus/Psychrometrics.hh>
55 :
56 : #define AIRDENSITY_CONSTEXPR(P, T, W) Psychrometrics::PsyRhoAirFnPbTdbW(P, T, W)
57 : #define AIRCP(W) Psychrometrics::PsyCpAirFnW(W)
58 : #define AIRDYNAMICVISCOSITY_CONSTEXPR(T) air_dynamic_viscosity(T)
59 : #ifndef TOKELVIN
60 : #include "../../../DataGlobals.hh"
61 : #define TOKELVIN(T) (T + Constant::Kelvin)
62 : #endif
63 :
64 : namespace EnergyPlus {
65 :
66 : // Forward declarations
67 : struct EnergyPlusData;
68 :
69 : namespace AirflowNetwork {
70 :
71 947 : constexpr Real64 air_dynamic_viscosity(Real64 T // Temperature in Celsius
72 : )
73 : {
74 947 : return 1.71432e-5 + 4.828e-8 * T;
75 : }
76 :
77 : struct AirProperties
78 : {
79 796 : AirProperties(EnergyPlusData &state) : lowerLimitErrIdx(0), upperLimitErrIdx(0), m_state(state)
80 : {
81 796 : }
82 :
83 : Real64 density(Real64 P, // Barometric pressure
84 : Real64 T, // Temperature in Celsius
85 : Real64 W // Humidity ratio
86 : );
87 :
88 : Real64 thermal_conductivity(Real64 T // Temperature in Celsius
89 : );
90 :
91 : Real64 dynamic_viscosity(Real64 T // Temperature in Celsius
92 : );
93 :
94 : Real64 kinematic_viscosity(Real64 P, // Barometric pressure
95 : Real64 T, // Temperature in Celsius
96 : Real64 W // Humidity ratio
97 : );
98 :
99 : Real64 thermal_diffusivity(Real64 P, // Barometric pressure
100 : Real64 T, // Temperature in Celsius
101 : Real64 W // Humidity ratio
102 : );
103 :
104 : Real64 prandtl_number(Real64 P, // Barometric pressure
105 : Real64 T, // Temperature in Celsius
106 : Real64 W // Humidity ratio
107 : );
108 :
109 : int lowerLimitErrIdx = 0;
110 : int upperLimitErrIdx = 0;
111 0 : void clear()
112 : {
113 0 : lowerLimitErrIdx = 0;
114 0 : upperLimitErrIdx = 0;
115 0 : }
116 :
117 : private:
118 : EnergyPlusData &m_state;
119 : };
120 :
121 : struct AirState
122 : {
123 : Real64 temperature;
124 : // Real64 pressure; //{0.0}; // gage pressure
125 : Real64 humidity_ratio;
126 : Real64 density;
127 : Real64 sqrt_density;
128 : Real64 viscosity;
129 :
130 : AirState();
131 : explicit AirState(double const airDensity);
132 : };
133 :
134 : } // namespace AirflowNetwork
135 :
136 : } // namespace EnergyPlus
137 :
138 : #endif
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