Pump#

class Pump(ID='', ins=None, outs=(), thermo=None, **kwargs)[source]#

Create a pump that sets the pressure of the outlet.

Parameters:

ins (Sequence[Stream | str], optional) – Inlet.
outs (Sequence[Stream | str], optional) – Outlet.
P=101325 (float, optional) – Pressure of output stream (Pa). If the pressure of the outlet is the same as the inlet, pump is designed to increase of pressure to dP_design.
pump_type='Default' (str) – If ‘Default’, a pump type is selected based on heuristics.
material (str, optional) – Contruction material of pump. Defaults to ‘Cast iron’.
dP_design=101325 (float) – Design pressure change for pump.
ignore_NPSH=True (bool) – Whether to take into consideration NPSH in the selection of a pump type.

Notes

Default pump selection and design and cost algorithms are based on [1].

Examples

Simulate Pump for pressure increase:

>>> from biosteam import Stream, settings
>>> from biosteam.units import Pump
>>> settings.set_thermo(['Water', 'Ethanol'], cache=True)
>>> feed = Stream('feed', Water=200, T=350)
>>> P1 = Pump('P1', ins=feed, outs='out', P=2e5)
>>> P1.simulate()
>>> P1.show()
Pump: P1
ins...
[0] feed
    phase: 'l', T: 350 K, P: 101325 Pa
    flow: 200 kmol/hr Water
outs...
[0] out
    phase: 'l', T: 350 K, P: 200000 Pa
    flow: 200 kmol/hr Water
>>> P1.results()
Pump                                   Units           P1
Electricity              Power            kW        0.288
                         Cost         USD/hr       0.0225
Design                   Type                 Centrifugal
                         Ideal power      hp        0.136
                         Flow rate       gpm         16.3
                         Efficiency                 0.352
                         Power            hp        0.386
                         Head             ft         96.3
                         Motor size       hp          0.5
Purchase cost            Pump            USD     4.37e+03
                         Motor           USD          273
Total purchase cost                      USD     4.64e+03
Installed equipment cost                 USD     1.53e+04
Utility cost                          USD/hr       0.0225

References

property pump_type#: Pump type

property material#: Pump material

line: str = 'Pump'#: 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