Paper Title:

Overview of PCMs for Concentrated Solar Power in the Temperature Range 200 to 350°C

Periodical Advances in Science and Technology (Volume 74)
Main Theme 5th FORUM ON NEW MATERIALS PART C
Edited by Pietro VINCENZINI, Kunihito KOUMOTO, Nicola ROMEO and Mark MEHOS
Pages 272-277
DOI 10.4028/www.scientific.net/AST.74.272
Citation Thomas Bauer et al., 2010, Advances in Science and Technology, 74, 272
Online since October 2010
Authors Thomas Bauer, Doerte Laing, Rainer Tamme
Keywords Phase Change Material (PCM), Potassium Nitrate, Sodium Nitrate, Solar-Thermal
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Thermal energy storage is an essential advantage of solar thermal power plants. The present paper focuses on latent heat storage using a phase change material (PCM). The paper lists literature and gives the current status of PCM work in the temperature range 200 to 350 °C. The system KNO3-NaNO3 is discussed in detail in terms of their thermo-physical properties in the liquid and solid phase. A comparison of literature data and own measurements for the density, heat capacity, thermal diffusivity and thermal conductivity is presented. Measurement results with the following methods are discussed: helium pycnometer, differential scanning calorimeter (DSC) and laser flash. Missing data of the thermal diffusivity and thermal conductivity are partly supplemented. Consistent thermo-physical properties in the liquid phase are presented.