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Applicability of thermal energy storage recycled ceramics to high temperature and compressed air operating conditions
- Kere, A., Sadiki, N., Py, X., Goetz, V.
- Energy conversion and management 2014 v.88 pp. 113-119
- air, asbestos, calcium silicate, ceramics, temperature, thermal conductivity, thermal energy, wastes
- Recycled ceramics made of inertized asbestos containing wastes have been submitted to high pressure/temperature cycling tests in the operating range of ACAES and CSP applications. Ten successive cycles between room conditions and 610°C/30bars for a cumulated duration of 2500h lead to a validation of the ability of the material to resist to those constrains. The Wollastonite/Augite initial structure is gradually transformed in a unique Augite containing material. While mechanical parameters and density are unchanged, thermal capacity is reduced by 5% and thermal conductivity increased by 30%. This last result offers an advantageous way to enhance the thermal conductivity of those recycled ceramics, a key parameter to control the charge/discharge power in TES systems.