![](https://iifiir-uploads.s3.fr-par.scw.cloud/conference/60/image/small-b66af960a91f3a2381bcea352f28ba46.png)
IIR document
Unravelling the relation between the crystallisation velocity and the hysteresis of phase change materials.
Number: 0035
Author(s) : HIEBLER S., SCHMIT H., TAFELMEIER S., HOOCK P.
Summary
In this work, the relation between the hysteresis of PCM and their crystallisation velocity is investigated with two types of polyethylene glycol: PEG 2000 and PEG 10 000. Calorimetric measurements via differential scanning calorimetry (DSC) show that a notable temperature difference between the enthalpy curves during crystallisation and melting, i.e. the hysteresis, persists even for unusually low heating/cooling rates. The temperature-dependent crystallisation velocities measured for different supercooling temperatures show that the crystallisation velocities for PEG 2000 are generally higher than those for PEG 10 000. A simple explicit finite differences model incorporating the crystallisation velocity was programmed. This simulation tool can be used to simulate DSC enthalpy curves that show good agreement with the measured curves. From the obtained results, it can be concluded, that the crystallisation velocities of the two PEGS, which are too low at supercooling below about 10 K, are the cause of the apparent hysteresis.
Available documents
Format PDF
Pages: 6 p.
Available
Free
Details
- Original title: Unravelling the relation between the crystallisation velocity and the hysteresis of phase change materials.
- Record ID : 30032386
- Languages: English
- Subject: Technology
- Source: 14th IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Paris France, May 29-31, 2024.
- Publication date: 2024/05/31
- DOI: http://dx.doi.org/10.18462/iir.pcm.2024.0035
Links
See other articles from the proceedings (40)
See the conference proceedings
Indexing
-
Standardization of PCM characterization via DSC.
- Author(s) : GSCHWANDER S., HAUSSMANN T., HAGELSTEIN G., et al.
- Date : 2016/05/18
- Languages : English
- Source: 11th IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Karlsruhe, Germany, May 18-20, 2016.
- Formats : PDF
View record
-
Numerical simulation on the phase change proces...
- Author(s) : DU Q., LIN W., CHEN M., YU T., CHEN Y., SONG W., LI Y., FENG Z.
- Date : 2024/05/31
- Languages : English
- Source: 14th IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Paris France, May 29-31, 2024.
- Formats : PDF
View record
-
Phase-change materials: numerical and DSC analy...
- Author(s) : KOUSKSOU T., JAMIL A., OMARI K. el, et al.
- Date : 2010/09/01
- Languages : English
- Source: 9th Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Sofia, Bulgaria, September 29-October 1, 2010.
- Formats : PDF
View record
-
Ice slurry crystallization based on kinetic pha...
- Author(s) : CHÉGNIMONHAN V., JOSSET C., PEERHOSSAINI H.
- Date : 2010/12
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 33 - n. 8
- Formats : PDF
View record
-
Thermal protection of ice cream during storage ...
- Author(s) : LEDUCQ D., NDOYE F. T., CHARRIAU C., et al.
- Date : 2015/08/16
- Languages : English
- Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
- Formats : PDF
View record