DefinitionsCoP,iPurchased cost equipment i (base conditions)FoBM,i Bare module $ factor (base conditions).CoBM,i BM equipment cost (base conditions).FBM,IBM factor corrected for not CS 1atmCBM,IBare module equipment costFM Materials factor (1 for carbon steel)FP Pressure factor (1 for pressure ~1 atm)CTMTotal module cost (addition to existing plant)CGRGrass roots cost (new plant, new site) 9. In a factored estimate, one first estimates the cost ofindividual pieces of equipment, then estimates thetotal installed cost by multiplying by factors. Factored Estimates Total Plant Capital Cost CTM (Fixed CapitalInvestment, FCI) can be estimated by a factoredestimate.

Cost of Estimate See Also Table 7.2Accuracy 1234 5 Cost of Estimate (Time) 7. Detailed (Firm or Contractors) Estimate + 6%, - 4% Everything included ready to go to construction phase Estimate low so actual cost will be high (+) Estimate high so actual cost will be low (-) Why is + # > - #.? 6. Definitive (Project Control) Estimate + 15%, - 7% PFD, P&ID, all vessel sketches, equip. Preliminary Design (Scope) Estimate + 25%, - 15% PFD, vessel sketches, equip. Study Estimate / Major Equipment + 30%, - 20% PFD, Cost Chart 4. Order of Magnitude Estimate (Feasibility) + 40%, - 20% BFD, Process Modification 2. Lang Factors Module cost approach Effect of temperature and pressure Capcost program 3. Outline Types of estimates Adjusting costs for changes in capacity Adjusting costs for changes in time Total plant cost estimates Direct, indirect, etc. Capital Cost Estimation NMSU Chemical EngineeringCh E 452Ģ.

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