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254 Lawrence K. Wang et al.

Table l8
Example Case Capital Costs for Venturi Scrubbers
Cost item Factor Cost($)
Direct Costs, DC
Purchased Equipment Costs
Venturi scrubber and auxiliary equipment As estimated, EC $223,000
Instrumentation Included with EC —
Sales tax 0.03 EC 6,690
Freight 0.05 EC 11.200
Purchased Equipment Cost, PEC 1.08 ECs $241,000
Direct Installation Costs
Foundation and supports 0.06 PEC $14,500
Erection and handling 0.40 PEC 96,400
Electrical 0.01 PEC 2,400
Piping 0.05 PEC 12,000
Insulation 0.03 PEC 7,200
Painting 0.01 PEC 2,400
0.56 PEC $134,000
Site Preparation As required, SP
Building As required, Bldg.
Total Direct Cost, DC 1.56 PEC + SP + Bldg. $375,000
Indirect Costs, IC
Engineering 0.10 PEC $24,000
Construction 0.10 PEC 24,000
Contractor fee 0.10 PEC 24,000
Start-up 0.01 PEC 2,400
Performance test 0.01 PEC 2,400
Contingency 0.03 PEC 7,200
Total Indirect Cost, IC 0.35 PEC $84,000
Total Capital Cost TCC = DC + IC 1.91 PEC + SP + Bldg. $460,310 +
SP + Bldg.

Table 9 is used to determine the direct installation costs (1.56PEC), indirect costs
(0.35PEC), and total capital costs (TCC) of the Venturi scrubber system. The fac-
tors given in Table 9 are now used to estimate the TCC:
TCC = (1.56PEC + 0.35PEC) + SP + Building (Tables 9 and 18)
TCC = 1.91PEC + SP + Building
TCC = 1.91($241,000) + SP + Building
TCC = $460,310 + SP + Building

Because the site preparation (SP) cost and building cost are specific to each instal-
lation, these costs are not included in this example.

B. The direct annual costs include electric power cost, water, operating labor, and main-
tenance costs (Table 17).
1. Power (electricity) Cost: Use Eq. (23) to estimate the fan power requirements, F .
p
a. It assumed that 2 wk out of the year the factory utilizing the Venturi scrubber is
shut down for inventory and retooling, which provides annual operating period