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Plant Engineering Calculator

Updated Sep 18, 2026

Compressor Sequencing Savings Calculator — Annual kWh, Cost & Payback

Compare baseline and optimized compressor package kW at the same demand to estimate annual kWh savings, cost savings, percent reduction and simple payback.

Live calculationWorking shownPrivate in browser

Inputs

Results

Power reduction 35 kW
Annual energy saved 210,000 kWh
Annual cost saved 1,680,000
Reduction 19.444444%
Simple payback 0.53571429 years
More actions

Shared links reopen these inputs. Recent and saved calculations stay in this browser unless you clear site data.

Formula

savings=(kWbase−kWopt)×hours; payback=project cost/annual cost savings.

Your calculation, step by step

These steps use the values currently entered above so the result can be checked independently.

  1. 1.Power reduction = max(0, 180 − 145) = 35 kW.
  2. 2.Annual energy saved = 35 × 6000 = 210,000 kWh.
  3. 3.Annual cost saved = 210,000 × 8 = 1,680,000; simple payback = 900000 ÷ 1,680,000 = 0.53571429 years.

How to use this calculator

  1. Enter measured or design values using the units shown beside each field.
  2. Review the live results and the substituted calculation steps before using the estimate.
  3. Check the assumptions below, then continue to a related calculator when the next engineering decision needs another model.

Worked example

Cutting 180 kW to 145 kW for 6,000 h saves 210,000 kWh/year.

Assumptions and limits

  • Compare power at equivalent delivered flow and pressure.
  • Tariff excludes demand charges unless folded into the entered effective rate.

How to interpret the result

Treat the primary result as an engineering screening value, then use the secondary outputs to understand scale, energy or operating impact. Confirm site measurements, equipment limits and applicable standards before making a design or control change.

Questions engineers ask

What must stay equivalent when comparing baseline and optimized compressor kW?

Delivered flow, header pressure and production duty should be comparable. Lower kW caused by lower production or lower required air delivery is not sequencing efficiency.

Does annual cost savings include demand charges?

Only if the entered effective tariff intentionally includes them. The basic calculation multiplies saved kWh by the entered energy rate; utility demand and time-of-use structures need separate treatment.

Why can measured savings differ from the simple estimate?

Real packages cycle, unload, blow off, vary pressure and move across efficiency curves. Logged package kW and flow over representative production periods provide a stronger investment basis.

Continue the calculation

Use the next calculator in the same engineering workflow instead of restarting from search.

air compressor sequencingcompressor unload savingscompressor specific power
Methodology. MAXScanner shows the governing formula, entered values and calculation outputs so the estimate is auditable. The calculator is a screening aid; assumptions and equipment-specific limits remain part of the engineering review.