Junction#

class Junction(ID='', upstream=None, downstream=None, thermo=None)[source]#

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: 20 kmol/hr Water
outs...
[0] s2
    phase: 'l', T: 298.15 K, P: 101325 Pa
    flow: 20 kmol/hr Water

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.

prioritize: bool = False#: Whether to prioritize unit operation specification within recycle loop (if any).

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

run()#: 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