Engineers' Workbench


PEW - the Process Engineers' Workbench

PEW saves design time and costs by bringing together a collection of important and frequently used chemical engineering calculations. There are calculations for fluid flow, heat transfer, mixing, and vessel calibration.

All the calculations have been verified and documented with extensive online help. The interface is presented in a standardised, easy-to-use format and the results can be displayed in tables and graphs. Features include unit conversion & calculators for physical properties, MW, friction factors, pipe diameter, and pipe roughness.


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  • Heat transfer
    • Heat loss from pipes
    • Heat loss from vessels
    • Simple heat exchanger
    • Tank solar heating
    • Batch heating / cooling
    • Heat transfer coefficients
    • Finned tube coefficients
  • Mixing
    • Vortex profile
    • Power Numbers
    • Speed / Power curves
  • Fluid Flow
    • Incompressible flow
    • Compressible flow
    • Gravity flow
    • Manifold T-junctions
    • Symmetrical T-junctions
    • Expansions/contractions
    • Orifice plates
    • Restrictors
    • Two phase flow
  • Equipment
    • Vessel Calibration


PEW can be downloaded as part of the PEL suite available here.

60 Second Guide to PEW

User Guide to PEW

Go to the PEL Suite


Fenske uses approximate shortcut methods to calculate the number of theoretical trays required for a particular separation of two key components at various reflux ratios. Click here for details.


CValve calculates the CV of a valve to control any specified gas/vapour, steam or liquid flow. Click here for details.


Packing will calculate the tower diameter, packing pressure drop, load point and flood point given one as a specification. Click here for details.


The Process Engineers' Library

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