Ann: Quarterly Shareholder Update, page-38

From the Quarterly Report......

GAS-TESS: our engineers have been testing the functionality of the technology to achieve maximum efficiency within the operating environment at SA Water’s Wastewater Treatment Plant. The maximum operating temperature of the GAS-TESS heat store has now been measured at 1350°C, so the silicon phase change material (PCM) is being configured to melt at less than 1300°C and achieve similar latent energy storage to pure silicon. In addition, the combustion products from burning biogas must be isolated from the silicon PCM. The GAS-TESS is operating well utilising the sensible heat of silicon bricks and a trial quantity of lower melting point silicon PCM. On completion of the characterisation tests, our engineers will be able to assess storage and other design and operating parameters to achieve optimal performance.


So with a bit of trial lower melting point PCM in the GAS-TESS the experiments continue. I wonder if having to protect the silicon from combustion products was the hiccup? Don't know if that was a known or was learned.