Section 3 VOC Controls - US Environmental Protection Agency

Substitution of the above values yields:
C A ' $130,800
Cost of Auxiliary Equipment: Assume that costs for the following auxiliary equipment have
been estimated from data in other parts of the Manual:
Ductwork $16,500
Dampers 7,200
Stack 8,500
Total $32,000
Total Capital Investment: The total capital investment is factored from the sum of the adsorber
unit and auxiliary equipment cost, as displayed in Table 1.5. Note that no line item cost has been
shown for instrumentation, for this cost is typically included in the adsorber price.
Therefore:
Purchased Equipment Cost = “B” = 1.08 x “A”= 1.08 x ($130,800 + $32,200) = $176,040
And:
Total Capital Investment (rounded) = 1.61 x “B” = $283,400
Annual Costs: Table 1.5 gives the direct and indirect annual costs for the carbon adsorber
system, as calculated from the factors in Section 1.1.4. Except for electricity, the calculations in
the table show how these costs were derived. The following discussion will deal with the electricity
cost.
First, recall that the electricity includes the power for the system fan, bed drying/cooling
fan, and the cooling water pump. (The solvent pump motor is normally so small that its power
consumption may be neglected.) These consumptions are calculated as follows:
System fan is calculated from Equation 1.32:
−
kWh = 0 746kW hp × 250 × 10 Q P
4
. ∆ θ
sf s s
1-33