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IIR document

Tool for the estimation of the melting enthalpy of PCM based on binary mixtures of salt + water.

Number: pap. 25

Author(s) : SCHMIT H., HENNEMANN P., RATHGEBER C., et al.

Summary

Salt hydrates as phase change materials (PCM) are known for their high volumetric melting enthalpies and generally lower prices compared to organic PCM. However, obtaining a value for the melting enthalpy can prove to be difficult: while literature might not provide a(n) (accurate) value, determining the values experimentally can be time-consuming.
In the past, a theoretical model was developed to predict the melting entropies of salt hydrates. It is based on a linear relationship between the melting entropy of a salt hydrate and the number of moles of water of this salt hydrate. Here, this model is shown to be also valid in case of eutectic mixtures. Based on the model, a tool is defined which allows the estimation of the melting entropy and, hence, the melting enthalpy of a multitude of binary mixtures of salt + water.

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Pages: 9

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Details

  • Original title: Tool for the estimation of the melting enthalpy of PCM based on binary mixtures of salt + water.
  • Record ID : 30017904
  • Languages: English
  • Source: 11th IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Karlsruhe, Germany, May 18-20, 2016.
  • Publication date: 2016/05/18
  • DOI: http://dx.doi.org/10.18462/iir.pcm.2016.0025

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