Light during daytime and when skies are clear.
But space-based solar power must grapple(努力克服)with the high cost per kilogram of launching things into space,says Richard Schwartz of Purdue University in West Lafayette,Indiana, If youre talking about it being economically viable or power of the Earth,its a tough go.he says.
Cal Boerman,Solarens director of energy services,says the company designed its satellites with a view to keeping launch costs down.We knew we had to come up with a different,revolu-tionary design,he says.A patent the company has won describes ways to reduce the systemSweight,including using inflatable minors to focus sunlight on solar cells,so a smaller number cancollect the same amount of energy.
But using minors introduces other chaHenges,including keeping the solar cells from overhea-ting,says Schwartz.You have to take care of heat dissipation(散发)because youre now concen-trating a lot of energy in one place,he says.According to the companys patent,Solarens solarcells will be connected to radiators to help keep them cool.
Though Boerman says the company believes it can make space-based solar power work,it is notexpecting to crowd out other forms of renewable energy.Laws in California and other states requireincreasing use of renewable energy in coming years,he points out.To meet those needs,were go-ing to need all types of renewable energy sources,he says.
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