Air purity and treatment

What does air treatment cost to run?

Compare two setups at the same delivered flow. Include electricity, regeneration, pressure loss and maintenance.

Your inputs

Example data – these are not your operating figures. Adjust them before calculating.

Net delivered flow after treatment [m³/min]Dry air at 1.01325 bar abs and 20 °C, not the volume in the pressurised pipe.Required gauge pressure after treatment [bar(g)]Absolute pressure = gauge pressure + 1.01325 bar.Annual operating time [h/year]Range 0 to 8760 h/year.Electricity price excluding VAT [CZK/kWh]Range 0 to 100 CZK/kWh.Specific energy consumption [kWh/m³]Compression energy only, at the required pressure AFTER treatment. Exclude regeneration, pressure drop and dryer electricity; otherwise the losses would be counted twice.Option 1: average dryer power consumption [kW]Range 0 to 1000000 kW.Option 1: regeneration as a share of inlet flow [%]Range 0 to 100 %.Option 1: pressure drop [bar]Range 0 to 3 bar.Option 1: maintenance [CZK/year]Range 0 to 1000000 CZK/year.Option 2: average dryer power consumption [kW]Range 0 to 1000000 kW.Option 2: regeneration as a share of inlet flow [%]Range 0 to 100 %.Option 2: pressure drop [bar]Range 0 to 3 bar.Option 2: maintenance [CZK/year]Range 0 to 1000000 CZK/year.

Result

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How we calculate

Method: With regeneration fraction r, inlet flow is Qnet/(1−r). Regeneration energy = (Qinlet−Qnet) × time × e. The pressure increment is calculated once from the entire inlet flow using the ratio of logarithms of absolute pressures; e must apply to the required pressure WITHOUT treatment loss. Add dryer electricity and maintenance.

Assumptions and limitations: Indicative energy model with constant efficiency. Do not enter specific energy consumption that already includes the same regeneration or pressure loss. This is the incremental cost of treatment, not the total cost of producing air.

Method references

CAGI Compressed Air & Gas Handbook, chapter 4, 2021 – system design, storage and pressure losses.
ISO 7183:2007, edition 2: dryer performance tests. These are not universal correction factors.

Method version 1.0. Standard references verified in the ISO catalogue; the physical balances are not calculations prescribed by ISO. Before final design, we will verify actual operating and catalogue data.