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A device to record ultra-rapid cooling profiles.

L Juan de Paz¹, D A Graf, A L Scandizzi

¹Universidad Nacional de Rosario, Rosario, Argentina.

|September 3, 2013

Summary

This study presents a fast-response temperature measurement system for ultra-rapid cooling processes. The system, using standard materials and an immersion device, accurately records cooling profiles of liquids and materials, including in liquid nitrogen (LN2).

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Area of Science:

Materials Science
Physical Chemistry
Engineering

Background:

Accurate and rapid temperature measurement is crucial for understanding ultra-fast physical and chemical processes.
Existing methods may lack the speed or simplicity required for dynamic cooling profile analysis.
Developing specialized equipment is necessary to capture transient thermal behaviors.

Purpose of the Study:

To design and validate a high-speed temperature measurement system for recording cooling profiles.
To enable the analysis of ultra-rapid cooling procedures using standard materials.
To facilitate comparative studies of different cooling rates and re-warming processes.

Main Methods:

Construction of a temperature measurement system with a sampling rate of up to 1000 samples per second.
Development of a specialized immersion device for controlled sample introduction into liquid nitrogen (LN2).
Testing the system by recording cooling profiles of distilled water and glycerol solutions.

Main Results:

The system successfully measured cooling rates, achieving 8732 °C/min for distilled water and 4441 °C/min for a 6 M glycerol solution.
A cooling rate of 204.012 °C/min was determined during the immersion of the thermocouple assembly in LN2.
The system demonstrated potential for evaluating re-warming processes with minor modifications.

Conclusions:

The developed system provides a simple, cost-effective solution for high-speed temperature monitoring.
It is suitable for characterizing the cooling dynamics of various substances in ultra-rapid procedures.
The system's versatility extends to analyzing re-warming kinetics, offering a comprehensive thermal analysis tool.