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Post by Ratty on Jul 15, 2019 12:22:13 GMT
I wonder what the EROI is on all that undersea cable? How much energy would be required to mine, smelt, make and install the cable? Then of course what does Singapore do on the diurnal occasions that the Sun is no longer visible to Northern Australia? Lots of these?
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Post by nautonnier on Jul 15, 2019 12:41:51 GMT
I wonder what the EROI is on all that undersea cable? How much energy would be required to mine, smelt, make and install the cable? Then of course what does Singapore do on the diurnal occasions that the Sun is no longer visible to Northern Australia? Lots of these? That's around 2 minutes consumption - and lots of child labor in the Congo getting the requisite Cobalt and lakes of drying lithium salts in South America.
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Post by fatjohn1408 on Jul 15, 2019 14:18:30 GMT
Lots of these? That's around 2 minutes consumption - and lots of child labor in the Congo getting the requisite Cobalt and lakes of drying lithium salts in South America. www.teraloop.org
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Post by nautonnier on Jul 15, 2019 14:47:58 GMT
That's around 2 minutes consumption - and lots of child labor in the Congo getting the requisite Cobalt and lakes of drying lithium salts in South America. www.teraloop.orgI will be a little 'Nullius in Verba' about it until there are more details. But what it means is during the daylight hours enough has to be generated to recharge the storage _and_ provide enough to meet the demand during the day. So ~double the generation capacity is needed. If there also needs to be allowance for occasional cloudy days of little sun then I start to get somewhat doubtful about the enterprise. There is another reason that this is not a really secure form of energy, the Chinese and Russians are mapping and interfering with undersea cables as an extremely easy way of collapsing the 'West'. One submarine action from China and Singapore goes dark. Some of many links cimsec.org/undersea-cables-challenges-protecting-seabed-lines-communication/35889futurism.com/russian-sub-fire-internet-cables
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Post by blustnmtn on Aug 13, 2019 13:25:38 GMT
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Post by nautonnier on Aug 13, 2019 14:24:55 GMT
Interesting factoid from that paper: "PV panels are thin and have little heat capacity per unit area but PV modules emit thermal radiation both up and down, and this is particularly significant during the day when PV modules are often 20 °C warmer than ambient temperatures"Something to think about when PV are put on the roof and you are in an area where summer in sun temperatures are regularly 35-38C your shingles will have PV modules of 55-58C a few inches above them, that could be risky dependent on the roof materials. Might call for some kind of reflective coating below the PV panels.
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Post by nautonnier on Aug 16, 2019 10:15:10 GMT
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Post by acidohm on May 2, 2020 7:59:04 GMT
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Post by Ratty on May 2, 2020 11:34:07 GMT
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Post by nautonnier on May 2, 2020 12:02:57 GMT
They will have to substantially increase the energy density of batteries to make even electric powered trucks viable.
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