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speed and algorithm improvements
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cortespea committed Dec 22, 2023
1 parent 093b900 commit 5da9678
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28 changes: 14 additions & 14 deletions biosteam/units/distillation.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1935,14 +1935,14 @@ class AdiabaticMultiStageVLEColumn(MultiStageEquilibrium):
outs...
[0] vapor
phase: 'g', T: 366.33 K, P: 101325 Pa
flow (kmol/hr): AceticAcid 3.71
flow (kmol/hr): AceticAcid 3.72
Water 73.8
MTBE 20
[1] liquid
phase: 'l', T: 372.87 K, P: 101325 Pa
flow (kmol/hr): AceticAcid 1.29
flow (kmol/hr): AceticAcid 1.28
Water 101
MTBE 0.000372
MTBE 0.000309
>>> absorber.results()
Absorber Units
Expand Down Expand Up @@ -2236,14 +2236,14 @@ class MESHDistillation(MultiStageEquilibrium, new_graphics=False):
>>> D1.results()
Distillation Units
Electricity Power kW 0.576
Cost USD/hr 0.045
Electricity Power kW 0.573
Cost USD/hr 0.0448
Cooling water Duty kJ/hr -2.98e+06
Flow kmol/hr 2.03e+03
Cost USD/hr 0.992
Low pressure steam Duty kJ/hr 7.8e+06
Flow kmol/hr 202
Cost USD/hr 47.9
Cost USD/hr 48
Design Theoretical stages 5
Actual stages 7
Height ft 24.3
Expand Down Expand Up @@ -2283,14 +2283,14 @@ class MESHDistillation(MultiStageEquilibrium, new_graphics=False):
>>> D1.results()
Distillation Units
Electricity Power kW 0.918
Cost USD/hr 0.0718
Electricity Power kW 0.917
Cost USD/hr 0.0717
Cooling water Duty kJ/hr -9.13e+06
Flow kmol/hr 6.24e+03
Cost USD/hr 3.04
Low pressure steam Duty kJ/hr 9.63e+06
Low pressure steam Duty kJ/hr 9.64e+06
Flow kmol/hr 249
Cost USD/hr 59.2
Cost USD/hr 59.3
Design Theoretical stages 5
Actual stages 6
Height ft 22.9
Expand All @@ -2301,11 +2301,11 @@ class MESHDistillation(MultiStageEquilibrium, new_graphics=False):
Tower USD 3.62e+04
Platform and ladders USD 9.8e+03
Condenser - Floating head USD 3.5e+04
Pump - Pump USD 4.33e+03
Pump - Motor USD 390
Pump - Pump USD 4.34e+03
Pump - Motor USD 389
Reboiler - Floating head USD 2.41e+04
Total purchase cost USD 1.17e+05
Utility cost USD/hr 62.3
Utility cost USD/hr 62.4
Notes
-----
Expand Down Expand Up @@ -2531,7 +2531,7 @@ def _actual_stages(self):
)
N_stages += 1
except:
N_stages += i.partition.phi in (0, 1)
N_stages += i.partition.B in (0, inf)
eff = eff ** (1 / N_stages)
return N_stages, np.ceil(N_stages / eff)
else:
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