Most of the following cost discussion is taken from the EPA OAQPS Cost Control Manual (1990). Costs for rigid-electrode, wire and plate, and flat-plate ESPs can be estimated using Figure .
Figure represents two cost curves (the two in the middle) along with their respective equations (outer lines with arrows). Each curve requires two equations for calculating cost: one for total plate areas between 10,000 and 50,000 ft2 and another for total plate areas between 50,000 and 1,000,000 ft2. The lower curve shows the cost for the basic unit without the standard options. It represents the flange-to-flange, field-erected price for a rigid-electrode design. The upper curve includes all of the standard options (listed in Table ) that are normally used in a modern system. All units (both curves) include the ESP casing, pyramidal hoppers, rigid electrodes and internal collection plates, transformer-rectifier (T-R) sets and microprocessor controls, rappers, and stub supports (legs) for 4-foot clearance below the hopper discharges. The costs are based on a number of actual quotes
that have been fitted to lines using the “least squares” method. Don’t be surprised if you obtain quotes that differ from these curves by as much as ±25%. (Significant savings can be obtained by solicitating multiple quotes.) The equations should not be used to extrapolate costs for total plates areas below 10,000 or above 1,000,000 ft2. The standard options included in the upper curve add approximately 45% to the basic cost of the flange-toflange hardware. Insulation costs are for 3 inches of field-installed glass fiber encased in a metal skin and applied on the outside of all areas in contact with the exhaust gas stream. Calculate insulation for ductwork, fan casings, and stacks separately. To obtain more accurate results, solve the equations for the lines instead of reading the values from the graph.
that have been fitted to lines using the “least squares” method. Don’t be surprised if you obtain quotes that differ from these curves by as much as ±25%. (Significant savings can be obtained by solicitating multiple quotes.) The equations should not be used to extrapolate costs for total plates areas below 10,000 or above 1,000,000 ft2. The standard options included in the upper curve add approximately 45% to the basic cost of the flange-toflange hardware. Insulation costs are for 3 inches of field-installed glass fiber encased in a metal skin and applied on the outside of all areas in contact with the exhaust gas stream. Calculate insulation for ductwork, fan casings, and stacks separately. To obtain more accurate results, solve the equations for the lines instead of reading the values from the graph.
Standard options for basic equipment
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