"

50 Process Economics Review

Important Equations

Total Capital Investment TCI=FCI+WCTCI=FCI+WC
Effect of capacity on equipment prices CaCb=(AaAb)nCaCb=(AaAb)n

ln(Ca)=ln(K)+nln(Aa)ln(Ca)=ln(K)+nln(Aa)

Effect of time on equipment prices C2=C1(I2I1)C2=C1(I2I1)
Preliminary Estimation of Purchased Equipment Costs Ce=a+bSnCe=a+bSn
Lang Factor CTM=Flangni=1Cp,iCTM=Flangni=1Cp,i
Return on Investment ROI=revenueCOMTCI×100%ROI=revenueCOMTCI×100%
Revenue revenue=unitpriceofproduct×salesrevenue=unitpriceofproduct×sales
Cost of manufacturing costofmanufacturing=directcost+fixedcost+generalexpensescostofmanufacturing=directcost+fixedcost+generalexpenses
Number of operating labour NOL=(6.29+31.7P2+0.23Nnp)0.5NOL=(6.29+31.7P2+0.23Nnp)0.5
Cost of operating labour # of operators=NOL×# of shifts in a year# of shifts per operator# of operators=NOL×# of shifts in a year# of shifts per operatorCOL=# of operators×salaryCOL=# of operators×salary
Total direct cost of manufacturing total direct cost of manufacturing=CRM+CWT+CUT+1.33COL+0.03COM+0.069FCItotal direct cost of manufacturing=CRM+CWT+CUT+1.33COL+0.03COM+0.069FCI
Total fixed cost of manufacturing total fixed cost of manufacturing=0.708COL+0.068FCI+depreciation(0.1FCI)total fixed cost of manufacturing=0.708COL+0.068FCI+depreciation(0.1FCI)
Depreciation depreciation=purchased valuesalvage valuelife of equipment (n)depreciation=purchased valuesalvage valuelife of equipment (n)
General expenses general expenses=0.177COL+0.009FCI+0.16COMgeneral expenses=0.177COL+0.009FCI+0.16COM
Cost of manufacturing cost of manufacturing=0.180FCI+1.23(CRM+CWT+CUT)+2.73COL+depreciation(0.1FCI)

Terms to Know

License

Icon for the Creative Commons Attribution-ShareAlike 4.0 International License

Foundations of Chemical and Biological Engineering I Copyright © 2020 by Jonathan Verrett is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License, except where otherwise noted.

Share This Book

Feedback/Errata

Comments are closed.