NGK presses on with sodium–sulphur

2 August 2023

NGK Insulators has supplied a 1 MW (DC)/5.8 MWh (DC) NAS battery system to a Korea Electric Power Co (KEPCO) test programme at Naju City aimed at comparing the performance of various types of stationary storage batteries. NGK has previously delivered NAS batteries to South Korea, to G-Philos in 2020, for a power-to-gas (P2G) demonstration project carried out by Korea Midland Power Co (KOMIPO) at Sangmyung wind farm, Jeju Island. According to NGK, the sodium– sulphur NAS battery can be installed safely in close proximity to hydrogen manufacturing equipment and has thus been evaluated as suitable for such P2G applications.

Above: NGK NAS battery installation at Kepco’s Naju demo site

A future Korean P2G demonstration project, to be conducted by G-Philos and Korea Institute of Energy Research (KIER) in 2024, will employ 2 MW (DC)/11.6 MWh (DC) of NGK NAS battery storage to provide back-up power for stable hydrogen production using renewable energy.

NGK has recently installed its first NAS battery in Australia, for a 250 kW (DC)/1450 kWh (DC) demo project at the Nova nickel-copper-cobalt mine, alongside PV systems. The NAS battery was considered suitable for this project, with its high capacity and good tolerance of harsh operating environments, with temperatures approaching 50°C. NGK says the NAS battery operational track record in the Middle East has verified its ability to deliver stable performance in extremely hot environments.

The National Battery Testing Centre, operated by the Queensland University of Technology, will remotely monitor the performance of the Nova battery and the University of Western Australia will use performance data to model its behaviour to better understand the NAS technology and how it can be best utilised within Australia.

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