Non-eutectic phase change materials for cold thermal energy storage

Research output: Contribution to journalArticlepeer-review

Authors

External organisations

  • Nanyang Technological University

Abstract

Phase change materials provide high-density thermal energy storage and a wide range of temperatures are required to meet different storage applications for cascaded thermal storage systems. Thus, non-eutectic phase change materials, namely aqueous ethylene glycol and ethanol solutions, are investigated in this paper for potential applications in high-grade cold thermal energy storage applications. The aqueous solutions of varying concentrations are characterized by differential scanning calorimetry and thermal response measurements for bulk PCMs. The phase change materials are able to meet a wide range of storage temperatures with no issue of phase separation. Graphene oxide powder of 1 wt.% is added as a stable nano-filler to enhance thermal conductivity and reduce supercooling degrees. Through thermal response measurements, improvements of charging times in the phase change of aqueous ethylene glycol and ethanol solutions are observed.

Details

Original languageEnglish
Pages (from-to)656-661
Number of pages6
JournalEnergy Procedia
Volume143
Early online date5 Jan 2018
Publication statusE-pub ahead of print - 5 Jan 2018

Keywords

  • cold thermal energy storage, differential scanning calorimetry, phase change materials

ASJC Scopus subject areas