How do you calculate blower energy cost on a CO2 capture skid?

Multiply operating hours by the energy cost per hour and by the average load share to get variable cost, then add the fixed demand charge. With 100 hours at $45/hr, 80% load, and a $250 demand charge, that is 100 x 45 x 0.80 = $3,600 variable plus $250 fixed = $3,850 total.

Why include a fixed demand cost separately?

Industrial electricity bills charge for peak kW demand independent of how many hours you run. On the default case the $250 demand charge is about 6.5% of the $3,850 total, so ignoring it understates true cost and hides savings available from peak-shaving or soft-starting the blower.

What does average blower load share mean?

It is the fraction of full-rated draw the blower actually pulls over the period. A blower throttled to 80% of duty consumes roughly 80% of the energy in this simplified model; in reality affinity laws make part-load savings even steeper, so treat 80% as a conservative figure.

What is a good blower cost per operating hour?

There is no universal target because it scales with blower size and electricity price, but the calculator returns $38.50/hr for the default. Track this number over time per skid: a rising cost per hour at constant capture volume usually signals filter fouling, bearing drag, or a drifting operating point.

How can I cut blower energy cost?

Clean inlet filters to drop pressure drop, fit a VFD so the blower follows actual flue-gas flow instead of running flat out, and shift heavy duty off peak-demand windows. Even trimming average load share from 80% to 70% on the default case saves $450 per period.

Blower energy cost vs total parasitic load, what is the difference?

Blower energy cost is just the air-moving line item. Total parasitic load also includes solvent pumps, the reboiler, and CO2 compression. Blowers typically account for a meaningful but minority slice, which is why isolating their cost helps you decide where efficiency money is best spent.

Carbon Capture & CO₂ Compression Equipment calculator

Blower Energy Cost Calculator

Centrifugal and positive-displacement blowers that move flue gas through an amine or solvent contactor are often the single largest parasitic load on a carbon capture train. This calculator converts blower runtime, hourly energy rate, average load share, and a fixed demand charge into a total operating cost so process engineers and plant accountants can see exactly what air movement is costing per period. Capture plant operators use it to compare blower duty against capture volume and to spot when a fouled inlet filter or oversized motor is quietly inflating the energy bill. Because demand charges on industrial tariffs can rival usage charges, separating the fixed component matters for any honest cost picture.

What this calculator does

Estimate blower operating cost for moving flue gas, air, or process gas through capture equipment, ducts, filters, and contactors.
Use it when blower energy cost in carbon capture and co₂ compression equipment is being put through a carbon capture and co₂ compression equipment weighted-cost review.
It computes total blower energy cost by adding load-weighted variable energy to a fixed demand charge, and also returns cost per operating hour.

Formula used

Variable blower energy cost = blower operating hours × blower energy cost per hour × average blower load share
Total blower energy cost = variable blower energy cost + fixed blower demand cost

Inputs explained

Blower operating hours:
Blower energy cost per hour:
Average blower load share:
Fixed blower demand cost:

How to use the result

Use it when costing the blower line item of a capture skid, comparing tariff scenarios, or quantifying the energy penalty of running a blower below or above its best-efficiency point.
It assumes a single representative hourly rate and a constant average load share; if your blower cycles between high and low duty or your utility uses time-of-use pricing, split the run into segments and total them.

Current U.S. benchmarks

Industrial electricity averages 8.66 cents per kWh across the U.S. (EIA, Apr 2026), up 5.5% from a year earlier. Energy-intensive steps carry this directly into unit cost.
Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate blower energy cost on a CO2 capture skid? Multiply operating hours by the energy cost per hour and by the average load share to get variable cost, then add the fixed demand charge. With 100 hours at $45/hr, 80% load, and a $250 demand charge, that is 100 x 45 x 0.80 = $3,600 variable plus $250 fixed = $3,850 total.
Why include a fixed demand cost separately? Industrial electricity bills charge for peak kW demand independent of how many hours you run. On the default case the $250 demand charge is about 6.5% of the $3,850 total, so ignoring it understates true cost and hides savings available from peak-shaving or soft-starting the blower.
What does average blower load share mean? It is the fraction of full-rated draw the blower actually pulls over the period. A blower throttled to 80% of duty consumes roughly 80% of the energy in this simplified model; in reality affinity laws make part-load savings even steeper, so treat 80% as a conservative figure.
What is a good blower cost per operating hour? There is no universal target because it scales with blower size and electricity price, but the calculator returns $38.50/hr for the default. Track this number over time per skid: a rising cost per hour at constant capture volume usually signals filter fouling, bearing drag, or a drifting operating point.
How can I cut blower energy cost? Clean inlet filters to drop pressure drop, fit a VFD so the blower follows actual flue-gas flow instead of running flat out, and shift heavy duty off peak-demand windows. Even trimming average load share from 80% to 70% on the default case saves $450 per period.

Last reviewed 2026-05-12.