Error handling
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steam/water functions
-
Air and flue gas functions
-
Lee-Kesler functions
All functions return large negative numbers in case of error. No function
returns a negative number less than -1000 no matter what units are
used. The returned values and reasons are:
-
-1001: The pressure is outside the acceptable range specified in IFC formulation
for Industrial use!
0.01 bar < P < 1000 bar
-
-1002: The temperature is outside the acceptable range specified in IFC
formulation for Industrial use!
0 C < T < 800 C
-
-1003: Dryness fraction should be within the following limits:
0.0= < Q < = 1.0
-
-1004: Pressure of the wet steam may not be more than 221.0 bar (pressure
at critical point is 221.2 bar) i.e.
P <= 221.0 bar
-
-1005: Temperature of the wet steam may not be more than 374.0 C (temperature
at critical point is 374.15 C) i.e.
T <= 374.0 C
-
-1012: It is impossible to find a point with the specified pressure [P] and
specific entropy [s]!
-
-1013: It is impossible to find a point with the specified pressure [P] and
specific volume [v]!
-
-1014: It is impossible to find a point with the specified pressure [P] and
specific enthalpy [h]!
-
-1015: Inputs are not enough to determine the state of the steam or water.
Pressure and temperature are too close to wet steam data.
-
-1016: Pressure and temperature are too close to critical point.
-
-1017: Specific volume is too small.
All functions return large negative numbers in case of error. No function
returns a negative number less than -20E+9 no matter what units are
used. The returned values and reasons are:
-
-21E+9: Moisture content, mc, is not acceptable!
0 =< mc < 0.30
-
-22E+9: Volumetric compositions should be within the interval zero and one
and the sum must be one.
-
-23E+9: Temperature should be within the following limits:
-40 C < T < 1500 C
-
-24E+9: It is impossible to find a temperature with the specified specific
enthalpy.
-
-25E+9: It is impossible to find a temperature with the specified specific
entropy.
-
-26E+9: It is impossible to find a temperature with the specified specific
heat capacity.
-
-27E+9: The wet bulb temperature is limited to:
-40 C < T < 70 C
-
-28E+9: The following condition should be satisfied:
DryBulbT >= WetBulbT
-
-29E+9: This combination of dry and wet bulb temperatures are not possible!
-
-30E+9: Pressure is outside the acceptable range:
0.001 bar < P < 20 bar
-
-31E+9: Gas constant is too small.
All functions return large negative numbers in case of error. No function
returns a negative number less than -2000. No matter what units are
used. The returned values and reasons are:
-
-2001: The pressure is outside the acceptable range!
0.01 < Pr < 10
Pr = Reduced pressure = P/Pcr
Pcr = Critical pressure
P = Pressure
-
-2002: The temperature is outside the acceptable range!
0.3 < Tr < 4.0
Tr = Reduced temperature = T/Tcr
Tcr = Critical temperature
T = Temperature
-
-2003: Dryness fraction should be within the following limits:
0.0= < Q < = 1.0
-
-2004: Pressure of wet vapor may not be more than Pcr i.e.
Pr < = 1.0
-
-2005: Temperature of wet vapor may not be more than Tcr i.e.
Tr < = 1.0
-
-2012: It is impossible to find a point with the specified reduced pressure
[Pr] and reduced specified entropy [sr]!
-
-2013: It is impossible to find a point with the specified reduced pressure
[Pr] and compressibility factor [Z]!
Z = ( V * P ) / ( R * T )
V = Specific volume
R = Gas Constant = 8.3144 J/(mol.K) =
10.732 psia.ft2/(lb-mol.R)
-
-2014: It is impossible to find a point with the specified reduced pressure
[Pr] and reduced specific enthalpy [h]!
-
-2015: Inputs are not enough to determine the state of the fluid. Pressure
and temperature are too close to wet vapor data.
-
-2016: It is impossible to find a point with the specified reduced pressure
[Pr] and reduced fugacity-pressure ratio [f]!
-
-2020: Acentric factor is out of acceptable range.
-0.5 < Af < 2.0
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