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August 2011 Update: In the most recent version of the IECM, the steam use at the reboiler is calculated using a new set of formulas. Please see the following section for details. 1. In case of steam extraction from the base plant steam cycle (derating) Eregen = Q*FHE 2. In case of steam supplied from an auxiliary NG boiler, Eregen = - EST2 = - (mNG*NGHV*NGB*ST) It maybe noted that in the case of auxiliary NG boiler, the energy penalty term is negative, implying that there is an increase in the net power generation of the plant. Total energy penalty of CO2 capture system is: where, E CO2, tot = Eregen + Epumping + Ecompr Eregen = as explained in (9) Epumping = Eblower + Epump Eblower (hp) = 144QfgPfg 33000 blower where Qfg and Pfg are expressed in ft3/min and psi, respectively, Ecompr = ecomp*mCO2/comp 3.6. Characterization of Uncertainties One of the distinguishing features of this modeling effort is a probabilistic capability that allows model inputs to be represented by probability distributions rather than single deterministic values. Uncertainties in these parameters reflect the ranges of values reported in the literature, the evolving nature of the technology, and practical considerations in running such plants. Table 4 lists the uncertainty distributions developed for performance model parameters based on the current literature on amine-based (MEA) systems. These distributions reflect both uncertainty and variability in system designs. solvent solvent E (hp)=2Q P pump 1714 pump where Qsolvent and Psolvent are expressed in gal/min and psi, respectively and, Table 4. Amine System Performance Model Parameters and Uncertainties Performance Parameter CO2 removal efficiency SO2 removal efficiency NO2 removal efficiency HCl removal efficiency Particulate removal eff. MEA concentration Units Data (Range) % Mostly 90 % Almost 100 % 20-30 % 90-95 % 50 wt% 15-50 Nominal Value 90 99.5 Unc. Representation (Distribution Function) - Uniform(99,100) 25 Uniform(20,30) 95 Uniform(90,95) 50 Uniform(40,60) 30- Integrated Environmental Control Model - Technical Documentation • 27PDF Image | Amine Based CO2 Capture
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