文档介绍：ENGINEERING ECONOMICS III
ESTIMATING THE PROFITABILITY
OF A CHEMICAL PLANT
t Estimating Investment
t Estimating Cost of Production
t Profitability Evaluation
ð Return on Investment (ROI)
ð Payout time (Tpay)
ð DCF Rate of Return (DCFROR)
ð Transfer Price
10/21/99 Engineering Economics 3 1
INVESTMENT ESTIMATION
t Total Investment =
Fixed Capital + Working Capital + Start-Up
Tinv = Fcap + Wcap + Stup
t Rules of Thumb
Wcap ~ Tinv
Stup ~ Fcap (Established [nth] Plant)
~ Fcap (First-of-a-King [Pioneer] Plant)
So: Tinv = Fcap + Fcap + Tinv
= Fcap (nth Plant)
= Fcap (Pioneer Plant)
10/21/99 Engineering Economics 3 2
FIXED CAPITAL ESTIMATION I
t Fixed Capital = Direct Cost + Indirect Cost
t Direct Cost = Onsite + Offsite
ð Onsite - Cost of plant facilities shown on flowsheet
aka ISBL (Inside Battery Limits)
ð Offsite - Cost of supporting facilities (boiler house, waste
treatment facilities, shop, lab, offices, etc.)
aka OSBL (Outside Battery Limits)
t Rule of Thumb
Offsite ~ Onsite (higher for grassroots plant, lower for
established plex with excess facilities)
10/21/99 Engineering Economics 3 3
FIXED CAPITAL ESTIMATION II
t Direct Cost = Onsite
t Indirect Cost = Owner’s Cost + Contingency
ð Owner’s Cost - engineering, supervision, construction expenses
Rule of Thumb: Owner’s Cost = 0.