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Review and characterisation of high-temperature phase change material candidates between 500 C and 700 degrees C

Journal

RENEWABLE & SUSTAINABLE ENERGY REVIEWS
Volume 150, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.rser.2021.111528

Keywords

Phase change material; Phase diagram; Differential scanning calorimetry; Phase change temperature; Phase change enthalpy; Specific heat capacity

Funding

  1. Australian Govern-ment, through the Australian Renewable Energy Agency (ARENA)
  2. University of South Australia
  3. University of South Australian through the Australia-Germany Joint Research Co-operation Scheme
  4. Federal Minis-try for Economic Affairs and Energy [FKZ 03ET1441]
  5. German Academic Exchange Service [DAAD-PPP-57446023]

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Latent heat thermal energy storage using phase change materials is a promising technology for integrating into concentrated solar power applications. While connecting multiple PCMs in series has potential to improve thermal performance, this technology has not been deployed commercially due to lack of reliable thermophysical property data for high temperature PCMs.
Latent heat thermal energy storage, by using phase change materials (PCMs), is considered as a promising technology that can be integrated into concentrated solar power (CSP) applications to mitigate the load and electricity supply. Multiple PCMs connected in series has attracted considerable research attention as this configuration has the potential to improve the thermal performance compared to single PCM storage. However, this technology has not yet been deployed in commercial CSP plants. One of the major restrictions is the lack of reliable thermophysical property data for high temperature PCMs. This study gives a broad review of the experimentally verified PCMs with melting temperatures from approximately 500 degrees C-700 degrees C, applicable to CSP systems. A further twelve PCM candidates, containing low-cost sodium and/or potassium salts, were identified in this study and their thermophysical properties were experimentally evaluated. It was found that nine of the new candidates can be used as PCMs.

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