def htpx(T=None, P=None, x=None):
"""
Convenience function to calculate steam enthalpy from temperature and
either pressure or vapor fraction. This function can be used for inlet
streams and initialization where temperature is known instead of enthalpy.
User must provided values for two of T, P, or x.
Args:
T: Temperature with units (between 200 and 3000 K)
P: Pressure with units (between 1 and 1e9 Pa), None if saturated vapor
x: Vapor fraction [mol vapor/mol total] (between 0 and 1), None if
superheated or subcooled
Returns:
Total molar enthalpy [J/mol].
"""
prop = Iapws95StateBlock(default={"parameters": Iapws95ParameterBlock()})
return _htpx(T=T,
P=P,
x=x,
prop=prop,
Tmin=270 * pyunits.K,
Tmax=3e3 * pyunits.K,
Pmin=1e-4 * pyunits.kPa,
Pmax=1e6 * pyunits.kPa)
def htpx(T, P=None, x=None):
"""
Convenience function to calculate steam enthalpy from temperature and
either pressure or vapor fraction. This function can be used for inlet
streams and initialization where temperature is known instead of enthalpy.
User must provided values for one (and only one) of arguments P and x.
Args:
T: Temperature [K] (between 200 and 3000)
P: Pressure [Pa] (between 1 and 1e9), None if saturated steam
x: Vapor fraction [mol vapor/mol total] (between 0 and 1), None if
superheated or subcooled
Returns:
Total molar enthalpy [J/mol].
"""
prop = Iapws95StateBlock(default={"parameters": Iapws95ParameterBlock()})
return _htpx(T=T,
P=P,
x=x,
prop=prop,
Tmin=270,
Tmax=3e3,
Pmin=0.1,
Pmax=1e9)
