The benefits of an intercontinental energy grid  

Posted by Big Gav in , , , , ,

ScienceAlert has an article on a DESERTEC Australia proposal to link the Australian gas an electricity grids with east Asia - The benefits of an intercontinental energy grid.

Imagine an Asian electricity grid anchored by China at one end and Australia on the other. The grid would carry and distribute hemispheric solar, geothermal, wind and wave energy. The vision is big. But so's the problem of climate change.

Start by looking at Asia's energy status quo. Fossil fuels dominate. Renewable energy development is sporadic. National grids aren't interconnected. Carbon costs aren't applied. Vision is lacking.

Now, apply sensible economic and technological rationalisation. What pops out is a networked Asian electricity backbone in which efficiency, price and environmental-friendliness count. A regional grid would offer a frictionless exchange of kilowatthours akin to the frictionless exchange of electrons the Internet has brought.

The plan would entail building a 10,000-kilometer long electricity transmission system stretching from Beijing to the Great Australian Bight. Australian concentrating solar power, geothermal, wind and wave energy would flow northward. It would be joined by the harnessed geothermal power of Indonesia's volcanoes. This torrent of Austro-Indonesian low emission energy would then wend its way across a wind farm-lined South China Sea to China. Or the transmission system could go by land through a Southeast Asia regional High Voltage Direct Current (HVDC) power line paralleling existing power lines in Malaysia, Thailand and Laos.

Southeast Asian natural gas and Laotian and Vietnamese hydro power plants could provide 'load balancing' in a regional grid dominated by renewables. Even China's Three Gorges Dam might find a role as hemispheric provider of peaking power. That's because using hydro (and natural gas) for baseload power in an electricity system dominated by renewables makes about as much sense as employing trapeze artists to shovel gravel.

Tibetan and southern Mongolian deserts could be developed for concentrating solar power, wind and geothermal energy. Windfarms stretching from Shenzen to Shanghai off China's east coast could similarly provide huge amounts of power.

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