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Laborb Carbona,b Utilities Electricity Steam Cooling Water CRF CRF x 1.08 — — — Table 1.8: Estimated Annual Costs for the Carbon Adsorber Cost Item Factors Unit Cost Calculation Estimated Cost Direct Annual Costs (DAC) Operator Labor Costs: Operator Supervisor Operating Materials Maintenance Costs: Labor 0.5 hours/shift 15% of operator cost — 0.5h/shift $27.48/hourd $27.48/hourd $30.23/hourd $4.20/lb $0.0676/kW h $5.00/1,000 lbs $3.55/1,000 gallonse 0.5h/shift x 3 shifts/day x 360 days/yr x $27.48/hr 0.15 x 14,839 0.5h/shift x 3 shifts/day x 360 days/yr x $27.48/hr x 1.1 0.2310 x $30.23/hour x 10,800 lb/379lbs/hour 0.2310 x $4.20/lb x 10,800 x 1.08 $0.0676 /kWh x 130,835 kWh/yr 3.5 lb/lb VOC x $5/1000 lb x 100 lb VOC/hr x 8,640 hr/yr 3.43 gal/lb steam x [(3.5 x 100 x 8,640) lb steam x $3.55/1000 gal] / yr 0.6 (14,839 + 2,226 + 16,323 + 16,323) 0.02 ($445,000) 0.01 ($445,000) 0.01 ($445,000) 0.0963 [445,000 – (1.08 x 45,360) + 861] $14,839 $2,226 $16,323 $16,323 $199 $11,311 $8,838 $15,120 $36,822 $122,004 $29,828 $10,560 $5,280 $5,280 $46,069 $97,017 ($279,418) ($60,400) Material Carbon Replacement (assuming a 5-year life): 100% of maintenance labor Total Direct Annual Cost (DAC) Indirect Annual Costs (IAC) Overhead Administrative charges Property tax Insurance Capital recoverya,b 60% of sum of operating labor, maintenance labor, & maintenance materials 2% of TCI 1% of TCI 1% of TCI CRF[TCI – (1.08Cc + Labor Cost for Carbon Replacement)] Total Indirect Annual Cost (IAC) Recovery Credit for toluene Total Annual Cost (TAC)c a The 1.08 factor applied to the carbon replacement cost is for freight and sales taxes. b The capital recovery cost factor, CRF, is a function of the carbon or equipment life and the opportunity cost of the capital (i.e., interest rate). The CRF is calculated using the following equation: i(1+i)n/((1+i)n-1), where n is equipment life and i is the interest rate. For a 5-year carbon life and 5% interest rate, the CFR is 0.2310. For a 15 year equipment life (absorber vessel and auxiliary equipment) and a 5% interest rate, the CRF = 0.0963. c Value shown has been rounded to three significant figures. d Bureau of Labor Statistics, May 2017 National Occupational Employment and Wage Estimates – United States, May 2017 (http://www.bls.gov/oes/current/oes_nat.htm). e Based on industrial water rates for users with greater than 15,000 gal monthly usage who purchase water from a municipality. Industrial users that have their own water source or supply with likely have lower water rates [27]. 1-43PDF Image | Carbon Adsorbers
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