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Total Maintenance Cost (%TPC) Maint. Cost Allocated to Labor (% total) Administrative & Support Cost (% total labor) CO2 Transportation Cost ($/ton) CO2 Storage Cost ($/ton) 2.5 2.5 40 40 30 30 2.4 2.38 IECM1 5.75 6.047 IECM1 1The IECM calculates updated values based on other values supplied as inputs. These values may change with different plant configurations. 2For a more thorough explanation and for the calculation of Nominal Sorbent Loss, see below. 3 For the calculation of the updated Heat-to-Electricity Efficiency, see below. 5.2.2 Model Adjustments for Advanced Amine-based CO2 Capture System Updated Heat Integration Equation In order to reflect the new regeneration heat requirement of the Advanced Amine CO2 capture process, the original regression equation was adjusted by a scaling factor. In the original model, regeneration heat is calculated based on the following regression equation: Regen Heat (Btu/ lb CO2) = Sorbent Circulation (tons/hr)* exp(2.5919 + 0.0259 * Reagent Concentration (%) - 6.3536 * Lean CO2 Loading (mol CO2/sorb) - 0.0015 * Actual CO2 Removal Efficiency (%) - 0.0059 * CO2 Flue Gas (lb moles/hr)*100/Total Gas (lb moles/hr) / Sorbent Molecular Weight (lb/lb*mole)/ CO2 Captured (tons/hr)* 429.9046 This regression equation was multiplied by a scaling factor of 0.7639 to approximately match the updated regeneration energy of 1516 Btu/ lb CO2 currently available by advanced amine-based CO2 capture systems, from 1984 Btu/ lb CO2 available for conventional MEA systems. Updated Heat-to-Electricity Conversion Efficiency Equation In previous versions of the IECM, the Heat-to-Electricity Conversion Efficiency (or equivalence factor) was selected from a range of values in the literature as 14%. In this new version of the IECM, the Heat-to-Electricity Conversion Efficiency was estimated from data obtained using the NETL 2007 Baseline report (NETL 2007). In the NETL Baseline report, the following data is available for a subcritical plant without CO2 Capture: Case 9 – Subcritical Plant without CO2 Capture, Gross Plant Size: 583 MW Coal Flow Rate: 437,699 lb coal/hr Therefore, approximately 750 lb coal/hr is burned for each gross MW produced for this plant. For a subcritical plant with CO2 Capture: Case 10 – Subcritical Plan with CO2 Capture, Gross Plant Size: 680 MW Coal Flow Rate: 646,589 lb coal/hr Integrated Environmental Control Model - Technical Documentation • 41PDF Image | Amine Based CO2 Capture
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