Applied research · Cold Facts column #8 · September 2026
The Physics of Cryogenic Treatment
Cooling a large load evenly is harder than heating it. This column explains why, and how chamber design and control keep a multi-ton payload on a safe cooling curve.
By Jack Cahn, Chief Technologist · First published in Cold Facts, Cryogenic Society of America, Vol. 42 No. 4, September 2026
Key points
- Thermal inertia: large steel parts keep a warm core after the surface cools. Cooling too fast creates thermal stress that can distort or crack a part.
- By Newton's law of cooling, the cooling rate falls as the part nears chamber temperature, so a steady, near-linear profile needs constant adjustment.
- PLC and PID control meter liquid nitrogen against a time-temperature profile, using several chamber and product sensors.
- Heat leaks in through supports, door seals, pipe penetrations and corners, and the chamber structure itself soaks up heat. Infrared readings show where.
- The article's figures track a 10,000 lb payload cooling toward −294 °F and the slow cooling of a 14,000 lb crusher-liner load.
This is DCI's summary. The full article, with its figures and references, is in the PDF above.
Related on this site
DCI treatment chambers · The treatment service
First published in Cold Facts, the magazine of the Cryogenic Society of America, September 2026. Shared here by the author.
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