feedtwin.props.backends.tabulated.TabulatedProperties Class Reference

Public Member Functions
None	__init__ (self, Sequence[float] p, Sequence[float] T, Mapping[str, Any] values, *, str source, str name="measured")
str	name (self)
bool	supports (self, str prop)
None	update (self, StatePair pair, float v1, float v2)
float	value (self, str prop)
Phase	phase (self)
float|None	quality (self)

Public Attributes
	source = source

Protected Attributes
	_p = np.asarray(p, dtype=float)
	_T = np.asarray(T, dtype=float)
str	_name = name
dict	_interp = {}
	_cursor = threading.local()

Detailed Description

Properties read from a measured grid over pressure and temperature.

Args:
    p: Strictly increasing pressures [Pa].
    T: Strictly increasing temperatures [K].
    values: Property name to a ``(len(p), len(T))`` array of values, in the
        SI units :data:`feedtwin.props.state.PROPERTIES` declares.
    source: Where the numbers came from -- a test campaign, a datasheet
        revision. Carried into every :class:`ThermoState` this produces, so
        a result can always be traced to the measurement behind it.
    name: Backend identifier; defaults to ``"measured"``.

Only ``StatePair.PT`` is addressable. Any other pair raises
:class:`OutOfRange`, which the chain answers by trying the next backend --
the same path as a state point outside the grid.

Definition at line 41 of file tabulated.py.

Constructor & Destructor Documentation

__init__()

None feedtwin.props.backends.tabulated.TabulatedProperties.__init__	(		self,
		Sequence[float]	p,
		Sequence[float]	T,
		Mapping[str, Any]	values,
		*	,
		str	source,
		str	name = "measured" )

Definition at line 59 of file tabulated.py.

Member Function Documentation

name()

str feedtwin.props.backends.tabulated.TabulatedProperties.name

(

self

)

Definition at line 108 of file tabulated.py.

References feedtwin.props.backends.coolprop.CoolPropBackend._name, and _name.

phase()

Phase feedtwin.props.backends.tabulated.TabulatedProperties.phase

(

self

)

Unknown: a measured grid does not carry phase information.

Reported honestly rather than guessed. A caller that needs the phase
gets it from an equation-of-state backend, which is what the chain is
for.

Definition at line 144 of file tabulated.py.

quality()

float | None feedtwin.props.backends.tabulated.TabulatedProperties.quality

(

self

)

Definition at line 153 of file tabulated.py.

supports()

bool feedtwin.props.backends.tabulated.TabulatedProperties.supports	(		self,
		str	prop )

Definition at line 111 of file tabulated.py.

References _interp.

update()

None feedtwin.props.backends.tabulated.TabulatedProperties.update	(		self,
		StatePair	pair,
		float	v1,
		float	v2 )

Definition at line 114 of file tabulated.py.

References _cursor, feedtwin.props.backends.coolprop.CoolPropBackend._name, _name, _p, and _T.

Referenced by combined_gui.PressureBarWidget.set_global_line_ys(), combined_gui.PressureBarWidget.set_limits(), and combined_gui.PressureBarWidget.set_value().

value()

float feedtwin.props.backends.tabulated.TabulatedProperties.value	(		self,
		str	prop )

Definition at line 131 of file tabulated.py.

References _cursor, _interp, feedtwin.props.backends.coolprop.CoolPropBackend._name, and _name.

Referenced by feedtwin.model.param.Uncertainty.__post_init__(), and feedtwin.model.param.Uncertainty.bounds().

Member Data Documentation

_cursor

feedtwin.props.backends.tabulated.TabulatedProperties._cursor = threading.local()

protected

Definition at line 105 of file tabulated.py.

Referenced by update(), and value().

_interp

dict feedtwin.props.backends.tabulated.TabulatedProperties._interp = {}

protected

Definition at line 85 of file tabulated.py.

Referenced by feedtwin.vessels.geometry.TabulatedGeometry.cross_section(), supports(), value(), feedtwin.vessels.geometry.TabulatedGeometry.volume_below(), and feedtwin.vessels.geometry.TabulatedGeometry.wetted_area().

_name

feedtwin.props.backends.tabulated.TabulatedProperties._name = name

protected

Definition at line 70 of file tabulated.py.

Referenced by name(), update(), and value().

_p

feedtwin.props.backends.tabulated.TabulatedProperties._p = np.asarray(p, dtype=float)

protected

Definition at line 68 of file tabulated.py.

Referenced by update().

_T

feedtwin.props.backends.tabulated.TabulatedProperties._T = np.asarray(T, dtype=float)

protected

Definition at line 69 of file tabulated.py.

Referenced by update().

source

feedtwin.props.backends.tabulated.TabulatedProperties.source = source

Definition at line 71 of file tabulated.py.

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The documentation for this class was generated from the following file:

• lib/feedtwin/feedtwin/props/backends/tabulated.py