Coffee, Tea, Roasting & Dry Goods Processing worked example

Nitrogen Flush Usage at 63% gas transfer efficiency: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop gas transfer efficiency to 63%, then walk the calculation through step by step. Estimate nitrogen required for flushing packages from package count, nitrogen use per package, and flush efficiency.

The inputs for this scenario

  • Packages nitrogen flushed: 8,500 units (held at the documented default)
  • Nitrogen volume per package: 0.18 units (held at the documented default)
  • Gas transfer efficiency: 63 % (the input this scenario stresses; the baseline uses 88)

Working through the calculation

  • The calculation starts from the formula this tool documents: Theoretical nitrogen flush usage = packages nitrogen flushed × nitrogen use per package.
  • required nitrogen flush usage works out to 2,429 ft³ at these inputs, and this is the headline figure for the scenario.
  • theoretical nitrogen flush usage works out to 1,530 ft³ at these inputs.
  • nitrogen flush usage loss allowance works out to 899 ft³ at these inputs.
  • nitrogen flush efficiency works out to 63 % at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where gas transfer efficiency sits at 88% and the headline result is 1,739 ft³, this scenario comes in 39.68% above the baseline at 2,429 ft³.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to gas transfer efficiency, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes a fixed nitrogen volume per package and a single efficiency figure; in practice headspace varies with bag fill level and residual oxygen targets, so verify your per-package figure against a gas analyzer reading.

Results at a glance

  • required nitrogen flush usage: 2,429 ft³ (headline result)
  • theoretical nitrogen flush usage: 1,530 ft³
  • nitrogen flush usage loss allowance: 899 ft³
  • nitrogen flush efficiency: 63 %

Run it with your numbers

  • To rerun this with your own numbers, open the live Nitrogen Flush Usage calculator, set gas transfer efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.