Junction

class Junction(ID='', upstream=None, downstream=None, thermo=None)

Create a Junction object that copies data from upstream to downstream. This serves to connect streams with different property packages.

Parameters:

• upstream=None (Stream or str, defaults to missing stream) – Stream that will be copied to downstream.

• downstream="" (Stream or str, defaults to missing stream) – Flow rate, T, P, and phase information will be copied from upstream to this stream. If None, stream will be missing.

Examples

Create a Junction object and connect streams with different chemicals:

>>> from biosteam import *
>>> settings.set_thermo(['Water'])
>>> s1 = Stream('s1', Water=20)
>>> settings.set_thermo(['Ethanol', 'Water'], cache=True)
>>> s2 = Stream('s2') # Note that s2 and s1 have different chemicals defined
>>> J1 = units.Junction('J1', s1, s2)
>>> J1.simulate()
>>> J1.show()
Junction: J1
ins...
[0] s1
    phase: 'l', T: 298.15 K, P: 101325 Pa
    flow (kmol/hr): Water  20
outs...
[0] s2
    phase: 'l', T: 298.15 K, P: 101325 Pa
    flow (kmol/hr): Water  20

power_utility(power): PowerUtility = PowerUtility(consumption=0.0, production=0.0)

Electric utility associated to unit (including auxiliary requirements).

design_results: dict[str, object] = {}

All design requirements excluding utility requirements and detailed auxiliary unit requirements.

baseline_purchase_costs: dict[str, float] = {}

All baseline purchase costs without accounting for design, pressure, and material factors.

purchase_costs: dict[str, float] = {}

Itemized purchase costs (including auxiliary units) accounting for design, pressure, and material factors (i.e., F_D, F_P, F_M). Items here are automatically updated at the end of unit simulation.

installed_costs: dict[str, float] = {}

All installed costs accounting for bare module, design, pressure, and material factors. Items here are automatically updated at the end of unit simulation.

simulate()

Run mass and energy balance. This method also runs specifications user defined specifications unless it is being run within a specification (to avoid infinite loops).

See also

_run, specifications, add_specification, add_bounded_numerical_specification

line: str = 'Junction'

class-attribute Name denoting the type of Unit class. Defaults to the class name of the first child class