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On the use of TGA for the study of degradation of thermal energy storage materials: analysis of the influence of evaporation.

Number: 0008

Author(s) : GARCIA-OCINA E., DIARCE G.

Summary

Selecting a thermal storage material requires consistent and predictable thermophysical properties. Thermogravimetric analysis (TGA) is a fundamental tool in study of the thermal behaviour of materials for energy storage. One of its main applications is the estimation of the thermal degradation of the materials by accelerated methods. However, evaporation has been observed as one of the main mechanisms of mass loss of some materials in TGA measurements, typically conducted in open crucibles. A commonly accepted solution to reduce the contribution of evaporation is the use of perforated lids. Nonetheless, placing a lid on the crucibles leads to severe difficulties in the quantification of evaporation. Therefore, a Computational Fluid Dynamics (CFD) model has been developed, based on the conditions of the specific TGA equipment. The use of this model enables the evaluation and quantification of the contribution of evaporation in real experiments, for both configurations, with and without a lid.

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Pages: 6 p.

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Details

  • Original title: On the use of TGA for the study of degradation of thermal energy storage materials: analysis of the influence of evaporation.
  • Record ID : 30032360
  • 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.2024.0008

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