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Just a couple of egos fighting for control. One thing you might notice is how imbalanced the whole setup is. 20 GW of panels (on 12000 hectares), 40 GWh of batteries, 3 GW cable to SIN. They'll charge the batteries in less than 3 hours on a good day. Of course on a bad week during the Wet they'll need every panel's miserable output (and they'll still fail)
It appears that there was the necessary concensus going into the JV but when cost estimation and other factors increased re the 4200km high voltage direct current cable two views formed : push on for Cannon-Brookes or use the electricity to make hydrogen or its brother, ammonia, which would be exported and then used to make electricity at the destination for Forrest.
"Sun Cable wanted to supply 15 per cent of Singapore’s electricity from a 12000-hectare solar farm with a capacity of as much as 20 gigawatts located 5000 kilometres away, near Tennant Creek in the Northern Territory.
The solar would be backed up by up to 42 gigawatt-hours of energy storage, at the Powell Creek cattle station south-west of Elliott and in Darwin, which would also get electricity for the local market.
The world’s longest under-sea electricity cable is currently 720 km, carrying 1400 megawatts of electricity to the UK generated from a hydroelectric plant in Norway. About 3.4 per cent of electricity is lost on that journey.
The idea of longer underwater power cables than exist at present is not new: several are under construction or proposed, including the 1200 km EuroAsia Interconnector that will connect Israel, Cyprus and Greece by the end of 2025, and the 1200 km IceLink cable envisaged between the UK and Iceland.
After converting electricity to hydrogen, shipping it and storing it, then converting it back to electricity in a fuel cell, the delivered energy can be below 30 per cent of what was in the initial electricity input,” said the IEA in that 2019 report.
Doing so won’t be simple; hydrogen is combustible and difficult to transport and must be chilled to negative 253 degrees if it is to be transported in liquid form. This is similar to natural gas, which is liquified for easier storage and transportation at negative 162 degrees."
Along with hydrogen embrittlement of the apparatus.
Then there is sovereign risk to the cable.
The price setting method will possibly be decisive: contract or markets.
Danger from transporting hydrogen or ammonia.
Last edited by johnny comelately on Mon Jan 23, 2023 6:50 am, edited 1 time in total.
Just compressing the H2 takes about 1/6 of its calorific value. Now, if your power is (a) free and (b) wouldn't be used anyway then that makes some sense. You also have a freezing problem with your equipment at the other end, but I imagine Singapore would be a ready market for piped cold water.
