Cryogenic Storage & LNG Equipment worked example

Cryogenic Cooldown Time at 7.2% cooldown hold and stabilization allowance: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop cooldown hold and stabilization allowance to 7.2%, then walk the calculation through step by step. Estimate the time needed to cool a tank, transfer line, vaporizer, or piping circuit from warm condition to cryogenic service.

The inputs for this scenario

  • Cooldown volume or thermal workload: 120 gal equivalent (held at the documented default)
  • Achievable cooldown rate: 12 gal equivalent / hr (held at the documented default)
  • Cooldown hold and stabilization allowance: 7.2 % (the input this scenario stresses; the baseline uses 10)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base cooldown time = cooldown volume or thermal workload รท achievable cooldown rate.
  • Required cooldown time works out to 10.72 hr at these inputs, and this is the headline figure for the scenario.
  • Base cooldown time works out to 10 hr at these inputs.
  • Cooldown stabilization allowance works out to 7.2 % at these inputs.
  • Achievable cooldown rate works out to 12 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where cooldown hold and stabilization allowance sits at 10% and the headline result is 11 hr, this scenario comes in 2.55% below the baseline at 10.72 hr.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to cooldown hold and stabilization allowance, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It models a single average cooldown rate, but real cooldowns slow near the bottom of the curve, so for large temperature spans split the cooldown into staged runs.

Results at a glance

  • Required cooldown time: 10.72 hr (headline result)
  • Base cooldown time: 10 hr
  • Cooldown stabilization allowance: 7.2 %
  • Achievable cooldown rate: 12 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Cryogenic Cooldown Time calculator, set cooldown hold and stabilization allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.