ccp.State#

class ccp.State(*args, **kwargs)#

A thermodynamic state.

This class is inherited from CP.AbstractState. Some extra functionality has been added.

Creates a state from fluid composition and two properties. Properties can be floats (SI units are considered) or pint quantities.

Parameters

pfloat, pint.Quantity: Pressure
Tfloat, pint.Quantity: Temperature
hfloat, pint.Quantity: Enthalpy
sfloat, pint.Quantity: Entropy
rhofloat, pint.Quantity: Specific mass
fluiddict: Dictionary with constituent and composition (mole fraction). (e.g.: fluid={‘Oxygen’: 0.2096, ‘Nitrogen’: 0.7812, ‘Argon’: 0.0092})
EOSstr, optional: String with REFPROP, HEOS, PR or SRK. Default is set in ccp.config.EOS

Returns

stateccp.State

Examples

>>> import ccp
>>> Q_ = ccp.Q_
>>> fluid = {'Oxygen': 0.2096, 'Nitrogen': 0.7812, 'Argon': 0.0092}
>>> s = ccp.State(p=101008, T=273, fluid=fluid)
>>> s.rho()
<Quantity(1.28939426, 'kilogram / meter ** 3')>
>>> # Using pint quantities
>>> s = ccp.State(fluid=fluid, p=Q_(1, 'atm'), T=Q_(0, 'degC'))
>>> s.h()
<Quantity(273291.7, 'joule / kilogram')>

Methods

Bvirial(self) → double#: Get the B virial coefficient - wrapper of c++ function :cpapi:`CoolProp::AbstractState::Bvirial(void)`

Cvirial(self) → double#: Get the C virial coefficient - wrapper of c++ function :cpapi:`CoolProp::AbstractState::Cvirial(void)`

PIP(self) → double#: Get the phase identification parameter - wrapper of c++ function :cpapi:`CoolProp::AbstractState::PIP`

Prandtl(self) → double#: Get the Prandtl number - wrapper of c++ function :cpapi:`CoolProp::AbstractState::Prandtl(void)`

Q(self) → double#: Get the vapor quality in mol/mol - wrapper of c++ function :cpapi:`CoolProp::AbstractState::Q(void)`

T(units=None)#

Temperature in Kelvin.

Returns

Tpint.Quantity: Temperature (Kelvin).

T_critical(units=None)#

Critical Temperature in K.

Returns

T_criticalpint.Quantity: Critical temperature (degK).

T_reducing(self) → double#: Gets the reducing temperature in K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::T_reducing`

Tmax(self) → double#: Set the maximum temperature in K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::Tmax`

Tmin(self) → double#: Set the minimum temperature in K- wrapper of c++ function :cpapi:`CoolProp::AbstractState::Tmin`

Ttriple(self) → double#: Set the triple point temperature in K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::Ttriple`

__init__(p=None, T=None, h=None, s=None, rho=None, fluid=None, EOS=None)#

acentric_factor(self) → double#: Get the acentric factor - wrapper of c++ function :cpapi:`CoolProp::AbstractState::acentric_factor(void)`

all_critical_points(self) → list#: Calculate all the critical points - wrapper of c++ function :cpapi:`CoolProp::AbstractState::all_critical_points`

alpha0(self) → CoolPropDbl#: Get the ideal-gas reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::alpha0`

alphar(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::alphar`

apply_simple_mixing_rule(self, size_t i, size_t j, string model)#: Apply a simple mixing rule - wrapper of c++ function :cpapi:`CoolProp::AbstractState::apply_simple_mixing_rule`

backend_name(self)#: Get the backend name - wrapper of c++ function :cpapi:`CoolProp::AbstractState::backend_name`

build_phase_envelope(self, string type)#: Build the phase envelope - wrapper of c++ function :cpapi:`CoolProp::AbstractState::build_phase_envelope`

build_spinodal(self)#: Calculate the spinodal - wrapper of c++ function :cpapi:`CoolProp::AbstractState::build_spinodal`

change_EOS(self, size_t i, string EOS_name)#: Change the EOS for one component - wrapper of c++ function :cpapi:`CoolProp::AbstractState::change_EOS`

chemical_potential(self, size_t i) → double#: Get the chemical potential of the i-th component - wrapper of c++ function :cpapi:`CoolProp::AbstractState::chemical_potential(std::size_t)`

compressibility_factor(self) → double#: Get the compressibility factor Z=p/(rho*R*T) - wrapper of c++ function :cpapi:`CoolProp::AbstractState::compressibility_factor(void)`

conductivity(units=None)#

Thermal conductivity (W/m/K).

Returns

conductivitypint.Quantity: Thermal conductivity (W/m/K).

conductivity_contributions(self) → dict#: Retrieve each of the contributions to the conductivity, each in W/m/K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::conductivity_contributions`

conformal_state(self, string reference_fluid, CoolPropDbl T, CoolPropDbl rho) → dict#: Solve for conformal state used in extended corresponding states - wrapper of c++ function :cpapi:`CoolProp::AbstractState::conformal_state`

cp(units=None)#

Specific heat at constant pressure joule/(kilogram kelvin).

Returns

cppint.Quantity: Specific heat at constant pressure joule/(kilogram kelvin).

cp0mass(self) → double#: Get the ideal gas constant pressure specific heat in J/kg/K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::cp0mass(void)`

cp0molar(self) → double#: Get the ideal gas constant pressure specific heat in J/mol/K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::cp0molar(void)`

cpmass(self) → double#: Get the constant pressure specific heat in J/kg/K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::cpmass(void)`

cpmolar(self) → double#: Get the constant pressure specific heat in J/mol/K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::cpmolar(void)`

criticality_contour_values(self) → tuple#: Gets the criticality matrix values L1* and M1* - wrapper of c++ function :cpapi:`CoolProp::AbstractState::criticality_contour_values` Returns a tuple of (L1*, M1*)

cv(units=None)#

Specific heat at constant volume joule/(kilogram kelvin).

Returns

cvpint.Quantity: Specific heat at constant volume joule/(kilogram kelvin).

cvmass(self) → double#: Get the constant volume specific heat in J/kg/K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::cvmass(void)`

cvmolar(self) → double#: Get the constant volume specific heat in J/mol/K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::cvmolar(void)`

d2alpha0_dDelta2(self) → CoolPropDbl#: Get the ideal-gas reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d2alpha0_dDelta2`

d2alpha0_dDelta_dTau(self) → CoolPropDbl#: Get the ideal-gas reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d2alpha0_dDelta_dTau`

d2alpha0_dTau2(self) → CoolPropDbl#: Get the ideal-gas reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d2alpha0_dTau2`

d2alphar_dDelta2(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d2alphar_dDelta2`

d2alphar_dDelta_dTau(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d2alphar_dDelta_dTau`

d2alphar_dTau2(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d2alphar_dTau2`

d3alpha0_dDelta2_dTau(self) → CoolPropDbl#: Get the ideal-gas reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d3alpha0_dDelta2_dTau`

d3alpha0_dDelta3(self) → CoolPropDbl#: Get the ideal-gas reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d3alpha0_dDelta3`

d3alpha0_dDelta_dTau2(self) → CoolPropDbl#: Get the ideal-gas reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d3alpha0_dDelta_dTau2`

d3alpha0_dTau3(self) → CoolPropDbl#: Get the ideal-gas reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d3alpha0_dTau3`

d3alphar_dDelta2_dTau(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d3alphar_dDelta2_dTau`

d3alphar_dDelta3(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d3alphar_dDelta3`

d3alphar_dDelta_dTau2(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d3alphar_dDelta_dTau2`

d3alphar_dTau3(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d3alphar_dTau3`

d4alphar_dDelta2_dTau2(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d4alphar_dDelta2_dTau2`

d4alphar_dDelta3_dTau(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d4alphar_dDelta3_dTau`

d4alphar_dDelta4(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d4alphar_dDelta4`

d4alphar_dDelta_dTau3(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d4alphar_dDelta_dTau3`

d4alphar_dTau4(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::d4alphar_dTau4`

dTdp_s(units=None)#

(dT / dp)s

First partial derivative of temperature related to pressure with constant entropy.

dalpha0_dDelta(self) → CoolPropDbl#: Get the ideal-gas reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::dalpha0_dDelta`

dalpha0_dTau(self) → CoolPropDbl#: Get the ideal-gas reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::dalpha0_dTau`

dalphar_dDelta(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::dalphar_dDelta`

dalphar_dTau(self) → CoolPropDbl#: Get the residual reduced Helmholtz energy - wrapper of c++ function :cpapi:`CoolProp::AbstractState::dalphar_dTau`

classmethod define(p=None, T=None, h=None, s=None, rho=None, fluid=None, EOS=None, **kwargs)#

Constructor for state.

Creates a state from fluid composition and two properties. Properties can be floats (SI units are considered) or pint quantities.

Parameters

pfloat, pint.Quantity: Pressure
Tfloat, pint.Quantity: Temperature
hfloat, pint.Quantity: Enthalpy
sfloat, pint.Quantity: Entropy
rhofloat, pint.Quantity: Specific mass
fluiddict: Dictionary with constituent and composition. (e.g.: fluid={‘Oxygen’: 0.2096, ‘Nitrogen’: 0.7812, ‘Argon’: 0.0092}) String with REFPROP, HEOS, PR or SRK. Default is set in ccp.config.EOS

Returns

stateccp.State

Examples

>>> import ccp
>>> Q_ = ccp.Q_
>>> fluid = {'Oxygen': 0.2096, 'Nitrogen': 0.7812, 'Argon': 0.0092}
>>> s = ccp.State.define(p=101008, T=273, fluid=fluid)
>>> s.rho()
<Quantity(1.28939426, 'kilogram / meter ** 3')>
>>> # Using pint quantities
>>> s = ccp.State.define(fluid=fluid, p=Q_(1, 'atm'), T=Q_(0, 'degC'))
>>> s.h()
<Quantity(273291.7, 'joule / kilogram')>

delta(self) → double#: Get the reduced density - wrapper of c++ function :cpapi:`CoolProp::AbstractState::delta(void)`

dpdv_s(units=None)#: Partial derivative of pressure to spec. volume with const. entropy.

first_partial_deriv(self, parameters OF, parameters WRT, parameters CONSTANT) → CoolPropDbl#: Get the first partial derivative - wrapper of c++ function :cpapi:`CoolProp::AbstractState::first_partial_deriv`

first_saturation_deriv(self, parameters OF, parameters WRT) → CoolPropDbl#: Get the first derivative along the saturation curve - wrapper of c++ function :cpapi:`CoolProp::AbstractState::first_saturation_deriv`

first_two_phase_deriv(self, parameters Of, parameters Wrt, parameters Constant) → double#: Get the first two-phase derivative - wrapper of C++ function :cpapi:`CoolProp::AbstractState::first_two_phase_deriv`

first_two_phase_deriv_splined(self, parameters Of, parameters Wrt, parameters Constant, double x_end) → double#: Get the first two-phase derivative using splines - wrapper of C++ function :cpapi:`CoolProp::AbstractState::first_two_phase_deriv_splined`

fluid_names(self)#: Get the list of fluid names - wrapper of c++ function :cpapi:`CoolProp::AbstractState::fluid_names`

fluid_param_string(self, string key)#: Get a fluid parameter string - wrapper of c++ function :cpapi:`CoolProp::AbstractState::fluid_param_string`

fugacity(self, size_t i) → double#: Get the fugacity of the i-th component - wrapper of c++ function :cpapi:`CoolProp::AbstractState::fugacity(std::size_t)`

fugacity_coefficient(self, size_t i) → double#: Get the fugacity coefficient of the i-th component - wrapper of c++ function :cpapi:`CoolProp::AbstractState::fugacity_coefficient(std::size_t)`

fundamental_derivative_of_gas_dynamics(self) → double#: Get the fundamental derivative of gas dynamics - wrapper of c++ function :cpapi:`CoolProp::AbstractState::fundamental_derivative_of_gas_dynamics(void)`

gas_constant(units=None)#

Gas constant in joule / (mol kelvin).

Returns

gas_constantpint.Quantity: Gas constant (joule / (mol kelvin).

get_binary_interaction_string(self, string CAS1, string CAS2, string parameter) → string#: Get a string interaction parameter - wrapper of c++ function :cpapi:`CoolProp::AbstractState::get_binary_interaction_string`

get_coolprop_state()#: Return a CoolProp state object.

get_fluid_constant(self, size_t i, parameters param) → double#: Get a constant for a fluid in the mixture :cpapi:`CoolProp::AbstractState::get_fluid_constant`

get_fluid_parameter_double(self, size_t i, string parameter) → double#: Get a fluid parameter that is a double-precision number - wrapper of c++ function :cpapi:`CoolProp::AbstractState::get_fluid_parameter_double`

get_mass_fractions(self)#: Get the mass fractions - wrapper of c++ function :cpapi:`CoolProp::AbstractState::get_mass_fractions`

get_mole_fractions(self)#: Get the mole fractions - wrapper of c++ function :cpapi:`CoolProp::AbstractState::get_mole_fractions`

get_phase_envelope_data(self) → PyPhaseEnvelopeData#: Get the phase envelope data - wrapper of c++ function :cpapi:`CoolProp::AbstractState::get_phase_envelope_data`

get_spinodal_data(self) → PySpinodalData#: Get the data from the spinodal - wrapper of c++ function :cpapi:`CoolProp::AbstractState::get_spinodal_data`

gibbsmass(self) → double#: Get the mass-specific Gibbs energy in J/kg - wrapper of c++ function :cpapi:`CoolProp::AbstractState::gibbsmass(void)`

gibbsmass_excess(self) → double#: Get the mass-specific excess Gibbs energy in J/kg - wrapper of c++ function :cpapi:`CoolProp::AbstractState::gibbsmass_excess(void)`

gibbsmolar(self) → double#: Get the mole-specific Gibbs energy in J/mol - wrapper of c++ function :cpapi:`CoolProp::AbstractState::gibbsmolar(void)`

gibbsmolar_excess(self) → double#: Get the mole-specific excess Gibbs energy in J/mol - wrapper of c++ function :cpapi:`CoolProp::AbstractState::gibbsmolar_excess(void)`

gibbsmolar_residual(self) → double#: Get the mole-specific residual Gibbs energy in J/mol - wrapper of c++ function :cpapi:`CoolProp::AbstractState::gibbsmolar_residual(void)`

h(units=None)#

Specific Enthalpy (joule/kilogram).

Returns

hpint.Quantity: Enthalpy (joule/kilogram).

has_melting_line(self) → bool#: Check if the fluid has a melting line - True if is does, False otherwise - wrapper of c++ function :cpapi:`CoolProp::AbstractState::has_melting_line`

helmholtzmass(self) → double#: Get the mass-specific Helmholtz energy in J/kg - wrapper of c++ function :cpapi:`CoolProp::AbstractState::helmholtzmass(void)`

helmholtzmass_excess(self) → double#: Get the mass-specific excess Helmholtz energy in J/kg - wrapper of c++ function :cpapi:`CoolProp::AbstractState::helmholtzmass_excess(void)`

helmholtzmolar(self) → double#: Get the mole-specific Helmholtz energy in J/mol - wrapper of c++ function :cpapi:`CoolProp::AbstractState::helmholtzmolar(void)`

helmholtzmolar_excess(self) → double#: Get the mole-specific excess Helmholtz energy in J/mol - wrapper of c++ function :cpapi:`CoolProp::AbstractState::helmholtzmolar_excess(void)`

hmass(self) → double#: Get the enthalpy in J/kg - wrapper of c++ function :cpapi:`CoolProp::AbstractState::hmass(void)`

hmass_excess(self) → double#: Get the mass-specific excess enthalpy in J/kg - wrapper of c++ function :cpapi:`CoolProp::AbstractState::hmass_excess(void)`

hmolar(self) → double#: Get the enthalpy in J/mol - wrapper of c++ function :cpapi:`CoolProp::AbstractState::hmolar(void)`

hmolar_excess(self) → double#: Get the mole-specific excess enthalpy in J/mol - wrapper of c++ function :cpapi:`CoolProp::AbstractState::hmolar_excess(void)`

hmolar_residual(self) → double#: Get the mole-specific residual enthalpy in J/mol - wrapper of c++ function :cpapi:`CoolProp::AbstractState::hmolar_residual(void)`

ideal_curve(self, string type) → tuple#: Get an ideal curve - wrapper of c++ function :cpapi:`CoolProp::AbstractState::ideal_curve`

isobaric_expansion_coefficient(self) → double#: Get the isobaric expansion coefficient - wrapper of c++ function :cpapi:`CoolProp::AbstractState::isobaric_expansion_coefficient(void)`

isothermal_compressibility(self) → double#: Get the isothermal_compressibility - wrapper of c++ function :cpapi:`CoolProp::AbstractState::isothermal_compressibility(void)`

kT()#

Isentropic temperature exponent (dimensionless).

Returns

kTpint.Quantity: Isentropic temperature exponent (dimensionless).

keyed_output(self, parameters iOutput) → double#: Get a keyed output :cpapi:`CoolProp::AbstractState::keyed_output(parameters key)`

kinematic_viscosity(units=None)#

Kinematic viscosity in m²/s.

Returns

kinematic_viscositypint.Quantity: Kinematic viscosity (m²/s)

kv()#

Isentropic volume exponent (dimensionless).

Returns

kvpint.Quantity: Isentropic volume exponent (dimensionless).

melting_line(self, int param, int given, double value) → double#: Get values from the melting line - wrapper of c++ function :cpapi:`CoolProp::AbstractState::melting_line`

molar_mass(units=None)#

Molar mass in kg/mol.

Returns

molar_masspint.Quantity: Molar mass (kg/mol).

mole_fractions_liquid(self)#: Get the mole fractions of the liquid phase - wrapper of c++ function :cpapi:`CoolProp::AbstractState::mole_fractions_liquid(void)`

mole_fractions_vapor(self)#: Get the mole fractions of the vapor phase - wrapper of c++ function :cpapi:`CoolProp::AbstractState::mole_fractions_vapor(void)`

name(self)#: Get the fluid name - wrapper of c++ function :cpapi:`CoolProp::AbstractState::name`

p(units=None)#

Pressure in Pascal.

Returns

ppint.Quantity: Pressure (pascal).

p_critical(units=None)#

Critical Pressure in Pa.

Returns

p_criticalpint.Quantity: Critical pressure (Pa).

phase(self) → phases#: Get the phase as key value- wrapper of c++ function :cpapi:`CoolProp::AbstractState::phase`

plot_envelope(T_units='degK', p_units='Pa', dew_point_margin=20, fig=None, **kwargs)#

Plot phase envelope.

Plots the phase envelope and dew point limit.

Parameters

T_unitsstr: Temperature units. Default is ‘degK’.
p_unitsstr: Pressure units. Default is ‘Pa’.
dew_point_marginfloat: Dew point margin. Default is 20 degK (from API). Unit is the same as T_units.
figplotly.graph_objects.Figure, optional: The figure object with the rotor representation.

Returns

figplotly.graph_objects.Figure: The figure object with the rotor representation.

plot_point(T_units='degK', p_units='Pa', fig=None, **kwargs)#

Plot point.

Plot point in the given figure. Function will check for axis units and plot the point accordingly.

Parameters

T_unitsstr: Temperature units. Default is ‘degK’.
p_unitsstr: Pressure units. Default is ‘Pa’.
figplotly.graph_objects.Figure, optional: The figure object with the rotor representation.
kwargsdict: Dictionary that will be passed to go.Scatter method.

Returns

figplotly.graph_objects.Figure: The figure object with the rotor representation.

pmax(self) → double#: Set the maximum pressure in Pa - wrapper of c++ function :cpapi:`CoolProp::AbstractState::pmax`

rho(units=None)#

Specific mass (kilogram/m**3).

Returns

rhopint.Quantity: Specific mass (kilogram/m**3).

rhomass(self) → double#: Get the density in kg/m^3 - wrapper of c++ function :cpapi:`CoolProp::AbstractState::rhomass(void)`

rhomass_critical(self) → double#: Gets the critical density in kg/m^3 - wrapper of c++ function :cpapi:`CoolProp::AbstractState::rhomass_critical`

rhomass_reducing(self) → double#: Gets the reducing density in kg/m^3 - wrapper of c++ function :cpapi:`CoolProp::AbstractState::rhomass_reducing`

rhomolar(self) → double#: Get the density in mol/m^3 - wrapper of c++ function :cpapi:`CoolProp::AbstractState::rhomolar(void)`

rhomolar_critical(self) → double#: Gets the critical density in mol/m^3 - wrapper of c++ function :cpapi:`CoolProp::AbstractState::rhomolar_critical`

rhomolar_reducing(self) → double#: Gets the reducing density in mol/m^3 - wrapper of c++ function :cpapi:`CoolProp::AbstractState::rhomolar_reducing`

s(units=None)#

Specific entropy (per unit of mass).

Returns

spint.Quantity: Entropy (joule/(kelvin kilogram)).

saturated_liquid_keyed_output(self, parameters iOutput) → double#: Get a trivial output for the saturated liquid :cpapi:`CoolProp::AbstractState::saturated_liquid_keyed_output(parameters key)`

saturated_vapor_keyed_output(self, parameters iOutput) → double#: Get a trivial output for the saturated vapor :cpapi:`CoolProp::AbstractState::saturated_vapor_keyed_output(parameters key)`

saturation_ancillary(self, parameters param, int Q, parameters given, double value) → double#: Get values from the saturation_ancillary - wrapper of c++ function :cpapi:`CoolProp::AbstractState::saturation_ancillary`

second_partial_deriv(self, parameters OF, parameters WRT1, parameters CONSTANT1, parameters WRT2, parameters CONSTANT2) → CoolPropDbl#: Get the second partial derivative - wrapper of c++ function :cpapi:`CoolProp::AbstractState::second_partial_deriv`

second_saturation_deriv(self, parameters OF1, parameters WRT1, parameters WRT2) → CoolPropDbl#: Get the second derivative along the saturation curve - wrapper of c++ function :cpapi:`CoolProp::AbstractState::second_saturation_deriv`

second_two_phase_deriv(self, parameters Of1, parameters Wrt1, parameters Constant1, parameters Wrt2, parameters Constant2) → double#: Get the second two-phase derivative - wrapper of C++ function :cpapi:`CoolProp::AbstractState::second_two_phase_deriv`

set_fluid_parameter_double(self, size_t i, string parameter, double val)#: Set a fluid parameter that is a double-precision number - wrapper of c++ function :cpapi:`CoolProp::AbstractState::set_fluid_parameter_double`

set_mass_fractions(self, vector[double] z)#: Set the mass fractions - wrapper of c++ function :cpapi:`CoolProp::AbstractState::set_mass_fractions`

set_mole_fractions(self, vector[double] z)#: Set the mole fractions - wrapper of c++ function :cpapi:`CoolProp::AbstractState::set_mole_fractions`

set_volu_fractions(self, vector[double] z)#: Set the volume fractions - wrapper of c++ function :cpapi:`CoolProp::AbstractState::set_volu_fractions`

smass(self) → double#: Get the entropy in J/kg/K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::smass(void)`

smass_excess(self) → double#: Get the mass-specific excess entropy in J/kg/K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::smass_excess(void)`

smolar(self) → double#: Get the entropy in J/mol/K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::smolar(void)`

smolar_excess(self) → double#: Get the mole-specific excess entropy in J/mol/K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::smolar_excess(void)`

smolar_residual(self) → double#: Get the mole-specific residual entropy in J/mol/K - wrapper of c++ function :cpapi:`CoolProp::AbstractState::smolar_residual(void)`

specify_phase(self, phases phase)#: Specify the phase - wrapper of c++ function :cpapi:`CoolProp::AbstractState::specify_phase`

speed_sound(units=None)#

Speed of sound - Eq. 8.1 from P. Nederstigt - Real Gas Thermodynamics.

Returns

speed_soundpint.Quantity: Speed of sound (m/s).

surface_tension(self) → double#: Get the surface tension N/m - wrapper of c++ function :cpapi:`CoolProp::AbstractState::surface_tension(void)`

tangent_plane_distance(self, double T, double p, vector[double] w, double rhomolar_guess=-1) → double#: Gets the tangent_plane_distance - wrapper of c++ function :cpapi:`CoolProp::AbstractState::tangent_plane_distance`

tau(self) → double#: Get the reciprocal reduced temperature - wrapper of c++ function :cpapi:`CoolProp::AbstractState::tau(void)`

trivial_keyed_output(self, parameters iOutput) → double#: Get a trivial keyed output not requiring any iteration :cpapi:`CoolProp::AbstractState::trivial_keyed_output(parameters key)`

true_critical_point(self) → tuple#: Get the “true” critical point where dp/drho|T = 0 & d2p/drho^2|T = 0 - wrapper of c++ function :cpapi:`CoolProp::AbstractState::true_critical_point`

umass(self) → double#: Get the internal energy in J/kg - wrapper of c++ function :cpapi:`CoolProp::AbstractState::umass(void)`

umass_excess(self) → double#: Get the mass-specific excess internal energy in J/kg - wrapper of c++ function :cpapi:`CoolProp::AbstractState::umass_excess(void)`

umolar(self) → double#: Get the internal energy in J/mol - wrapper of c++ function :cpapi:`CoolProp::AbstractState::umolar(void)`

umolar_excess(self) → double#: Get the mole-specific excess internal energy in J/mol - wrapper of c++ function :cpapi:`CoolProp::AbstractState::umolar_excess(void)`

unspecify_phase(self)#: Unspecify the phase - wrapper of c++ function :cpapi:`CoolProp::AbstractState::unspecify_phase`

update(p=None, T=None, rho=None, h=None, s=None, **kwargs)#

Update the state.

This method simplifies the state update. Only keyword arguments are required to update.

Parameters

pfloat, pint.Quantity: Pressure (Pa).
Tfloat, pint.Quantity: Temperature (degK).
rhofloat, pint.Quantity: Specific mass (kg/m**3).
hfloat, pint.Quantity: Enthalpy (J/kg).
sfloat, pint.Quantity: Entropy (J/(kg*degK)).

update_with_guesses(self, input_pairs ipair, double Value1, double Value2, PyGuessesStructure guesses)#: Update function - wrapper of c++ function :cpapi:`CoolProp::AbstractState::update`

v(units=None)#

Specific volume (m**3/kilogram).

Returns

vpint.Quantity: Specific volume (m**3/kilogram).

viscosity(units=None)#

Viscosity in pascal second.

Returns

viscositypint.Quantity: Viscosity (pascal second)

viscosity_contributions(self) → dict#: Retrieve each of the contributions to the viscosity, each in Pa-s - wrapper of c++ function :cpapi:`CoolProp::AbstractState::viscosity_contributions`

volumemass_excess(self) → double#: Get the mass-specific excess volume in m^3/kg - wrapper of c++ function :cpapi:`CoolProp::AbstractState::volumemass_excess(void)`

volumemolar_excess(self) → double#: Get the mole-specific excess volume in m^3/mol - wrapper of c++ function :cpapi:`CoolProp::AbstractState::volumemolar_excess(void)`

z(units=None)#

Compressibility (dimensionless).

Returns

zpint.Quantity: Compressibility (dimensionless).

Attributes

`get_binary_interaction_double`	Get a double precision interaction parameter - wrapper of c++ function :cpapi:`CoolProp::AbstractState::get_binary_interaction_double`
`set_binary_interaction_double`	Set a double precision interaction parameter - wrapper of c++ function :cpapi:`CoolProp::AbstractState::set_binary_interaction_double`
`set_binary_interaction_string`	Set a string interaction parameter - wrapper of c++ function :cpapi:`CoolProp::AbstractState::set_binary_interaction_string`