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Since the power generation (EST2) was estimated as MWe, the following expression maybe obtained after accounting for the unit conversions CST2 = $300000*(EST2) MEA reclaimer: In order to avoid accumulation of the heat stable salts in the solvent stream and to recover some of the lost MEA solvent, a part of the solvent stream is periodically distilled in this vessel. Addition of caustic helps in freeing of some of the MEA. The amount of MEA makeup required, maybe taken as an indicative of the amount of heat stable salts formed and the quantity of solvent to be distilled in the reclaimer. So, the mass flow rate of makeup MEA requirement is used as a scaling parameter to estimate the cost of this unit, based on a reference study. M 0.6 CMEA_reclaimer = CMEA_reclaimer, ref MEA_makeup MMEA_makeup,ref Solvent processing area: The solvent processing area primarily consists of solvent cooler, MEA storage tank, and a mixer. It also consists of an activated carbon bed filter that adsorbs impurities (degradation products of MEA) from the solvent stream. So, the size (and cost) of this unit (together) will be a function of the total solvent flow rate, and maybe estimated as follows V 0.6 Csolvent _ proc = Csolvent_proc, ref solvent Vsolvent,ref CO2 drying and compression unit: The multi-stage compression unit with inter-stage cooling and drying yields a final CO2 product at the specified pressure (about 2000 psig) that contains moisture and other impurities (e.g. N2) at acceptable levels. Obviously, the size (and cost) of this unit will be a function of the CO2 product flow rate, and maybe estimated as follows M 0.6 CCO 2 _ compr = CCO2_compr, ref CO2 MCO2,ref The sum of all these individual process area equipment costs is termed as process facilities cost (PFC). The various indirect costs are then estimated as fractions of the total direct cost (PFC) following the EPRI cost estimating guidelines (TAG, 1993). Table 5 lists the elements of total capital cost. Because of data limitations some of the indirect cost factors are estimated based on other technologies. Table 5. MEA Capital Cost Model Parameters and Nominal Values Capital Cost Elements A Process Area Equipment Costs B Total Process Facilities Cost (PFC) C Engineering and Home Office D General Facilities E Project Contingency F Process Contingency G Total Plant Cost (TPC) = sum of above H Interest Costs During Constr. I Royalty Fees J Pre-production (Fixed O&M) Value A1, A2, A3,..., A10 Ai 10% PFC 10% PFC 15% PFC 2% PFC B+C+D+E+F Calculated 0.5% PFC 1 month Integrated Environmental Control Model - Technical Documentation • 32PDF Image | Amine Based CO2 Capture
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