Process Manufacturing worked example

Process Cooling Time at 23% approach-temperature and hold allowance: a worked example

This scenario runs the process cooling time calculation on the strong side: 23% approach-temperature and hold allowance, with every other input held at its documented default. estimating cool-down time before sampling, transfer, packaging, or safe handling

The inputs for this scenario

  • Total heat to remove from the batch: 720,000 Btu (unchanged)
  • Effective cooling rate delivered: 15,000 Btu / min (unchanged)
  • Approach-temperature and hold allowance: 23 % (raised for this scenario; the documented default is 20)

Working through the calculation

  • Applying the documented formula (Base cooling time = heat to remove รท actual cooling rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 59.04 min for required cooling time, the number this scenario is built around.
  • At this operating point the engine returns 48 min for base cooling time.
  • At this operating point the engine returns 23 % for cooling allowance applied.
  • At this operating point the engine returns 15,000 pieces / min for actual cooling rate.

How this compares with the baseline

  • Against the tool's baseline example, where approach-temperature and hold allowance sits at 20% and the headline result is 57.6 min, this scenario comes in 2.5% above the baseline at 59.04 min.
  • Use it when scheduling batch cool-down, sizing a chiller or cooling jacket, or diagnosing why a cooling step is throttling throughput. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • required cooling time: 59.04 min (headline result)
  • base cooling time: 48 min
  • cooling allowance applied: 23 %
  • actual cooling rate: 15,000 pieces / min

Run it with your numbers

  • Every input above is editable in the live Process Cooling Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.