MolecularSieve#
- class MolecularSieve(ID='', ins=None, outs=(), thermo=None, **kwargs)[source]#
Create an ethanol/water molecular sieve for bioethanol plants. The molecular sieve is modeled as a component wise separator. Costing is based on scaling by the 6/10ths rule from an NREL TEA report [1].
- Parameters:
ins (
Stream], optional) –[0] Feed (gas)
outs (
Stream], optional) –[0] Split stream (gas)
[1] Remainder stream (gas)
split (array_like) – Componentwise split to the 0th output stream
Examples
>>> from biosteam import Stream, settings >>> from biosteam.units import MolecularSieve >>> settings.set_thermo(['Water', 'Ethanol'], cache=True) >>> feed = Stream('feed', flow=(75.7, 286), T=351.39, phase='g') >>> bp = feed.bubble_point_at_T() >>> feed.T = bp.T >>> MS1 = MolecularSieve('MS1', ins=feed, ... outs=('ethanol_rich', 'water_rich'), ... split=dict(Water=0.160, ... Ethanol=0.925)) >>> MS1.simulate() >>> MS1.show(T='degC', P='atm', composition= True) MolecularSieve: MS1 ins... [0] feed phase: 'g', T: 78.24 degC, P: 1 atm composition (%): Water 20.9 Ethanol 79.1 ------- 362 kmol/hr outs... [0] ethanol_rich phase: 'g', T: 78.24 degC, P: 1 atm composition (%): Water 4.38 Ethanol 95.6 ------- 277 kmol/hr [1] water_rich phase: 'g', T: 78.24 degC, P: 1 atm composition (%): Water 74.8 Ethanol 25.2 ------- 85 kmol/hr
>>> MS1.results() Molecular sieve Units MS1 Electricity Power kW 14.2 Cost USD/hr 1.11 Low pressure steam Duty kJ/hr 3.21e+06 Flow kmol/hr 83 Cost USD/hr 19.7 Cooling water Duty kJ/hr -1.18e+05 Flow kmol/hr 80.9 Cost USD/hr 0.0395 Design Flow rate kg/hr 2.13e+03 Purchase cost Column USD 6.85e+05 Total purchase cost USD 6.85e+05 Utility cost USD/hr 20.9
References