Pump
====

The Pump model is a
:ref:`PressureChanger <reference_guides/model_libraries/generic/unit_models/pressure_changer:Pressure Changer>`,
where the configuration is set so that the "compressor" option can only be True,
and the default "thermodynamic_assumption" is "pump."  See the
:ref:`PressureChanger documentation <reference_guides/model_libraries/generic/unit_models/pressure_changer:Pressure Changer>`
for details.


Example
-------

The example below demonstrates the basic Pump model usage:

.. testcode::

  import pyomo.environ as pyo
  from idaes.core import FlowsheetBlock
  from idaes.models.unit_models import Pump
  from idaes.models.properties import iapws95

  m = pyo.ConcreteModel()
  m.fs = FlowsheetBlock(dynamic=False)
  m.fs.properties = iapws95.Iapws95ParameterBlock()
  m.fs.unit = Pump(property_package=m.fs.properties)

  m.fs.unit.inlet.flow_mol[0].fix(100)
  m.fs.unit.inlet.enth_mol[0].fix(2000)
  m.fs.unit.inlet.pressure[0].fix(101325)

  m.fs.unit.deltaP.fix(100000)
  m.fs.unit.efficiency_pump.fix(0.8)