- Title
- High temperature thermal storage materials with high energy density and conductivity
- Creator
- Reed, Samuel; Sugo, Heber; Kisi, Erich
- Relation
- ARC.DP150101257 http://purl.org/au-research/grants/arc/DP150101257
- Relation
- Solar Energy Vol. 163, p. 307-314
- Publisher Link
- http://dx.doi.org/10.1016/j.solener.2018.02.005
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2018
- Description
- A metastable miscibility gap in the C-Al binary phase diagram has been exploited to produce macroscopically solid phase-change enhanced thermal energy storage materials. With 50% by volume of Al or Al-12.7%Si dispersed in a graphite matrix, the materials have thermal conductivity of ∼150 W/m K, energy densities of 0.9 and 1.1 MJ/L for ΔT = 100 °C and energy storage/delivery temperatures centred around 660 °C and 577 °C respectively. These characteristics are matched to both direct-steam and fluid-mediated concentrated solar thermal power systems using conventional Rankine cycle steam turbine-generator technology. Powder metallurgy processing combined with a low-temperature binder ensures a non-percolating inverse microstructure in which the phase change Al or Al-Si particles are securely encapsulated, thereby overcoming the usual containment problems associated with metallic phase change materials. The graphite and binder system used have been shown to be stable upon short-term thermal cycling or holding at the maximum expected operating temperature.
- Subject
- miscibility gap alloy; thermal energy storage; phase change material; high conductivity; SDG 7; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1442594
- Identifier
- uon:41733
- Identifier
- ISSN:0038-092X
- Language
- eng
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Goal 7: Ensure access to affordable, reliable, sustainable and modern energy
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