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The Mining Town Where People Live Under the Earth (cnet.com)
Claire Reilly, writing for CNET: After spending a night in an underground rock cave in the middle of the Australian desert, I learned three things: The silence is deafening. Your eyes never adjust to the darkness. And if nobody brushes the ceiling before you arrive, that clump of dirt is going to scare the living hell out of you when it drops on your face at 2 a.m. I've flown 1,200 miles for the privilege of sleeping in a hole in Coober Pedy. There's no Wi-Fi down here. The glare of my MacBook feels obnoxious in the subterranean stillness. The TV plays ads for a "local" cleaning service from the next town over, but that just happens to be 400 miles away. Australia is a country defined by "the tyranny of distance," but traveling to the underground opal mining town of Coober Pedy feels like taking a holiday on Mars.
In the middle of the South Australian desert and an eight hour drive in either direction from the nearest capital city (Adelaide to the south or Alice Springs to the north), Coober Pedy is off the grid and mostly hidden underground. More than half the residents live buried in the bedrock in cavelike homes called "dugouts" in order to escape freezing winters, scorching summers and the occasional cyclone. Often, the only sign you're walking on someone's roof is the air vent that's sprouted up next to your boots. While first nation peoples have lived in the central Australian desert for thousands of years, the Coober Pedy we know today wouldn't exist without opals. Miners rushed here in the 1920s, enduring extreme conditions to hunt for the multicolored gems, digging, bulldozing and eventually blasting out earth in a bid to find the elusive seam that would make them rich. Living in Coober Pedy is not just about surviving. It's about carving out a way of life in one of the harshest environments on the planet.
[...] "It's not like we're living thousands of kilometers under the ground," he tells me. "It's pretty similar to living in a normal house." Sam's family, who live in a dugout close to Crocodile Harry's, have solar panels for power -- but those generate only enough electricity for a few hours a day. Diesel handles the rest, he says. "We have to rely on tourists to pay for our fuel," he says. "Gasoline is valuable out here. Fuel is really expensive." That means no fridge running all day and night -- they keep nonperishable food and get the rest from town every day. Otherwise, life is pretty similar to what other 18-year-olds in the city experience. Sam says he can still charge his phone and use the TV "for a bit." "We have internet when the generator's on. Dad's got an Xbox but we don't even try to use the solar for that."
In the middle of the South Australian desert and an eight hour drive in either direction from the nearest capital city (Adelaide to the south or Alice Springs to the north), Coober Pedy is off the grid and mostly hidden underground. More than half the residents live buried in the bedrock in cavelike homes called "dugouts" in order to escape freezing winters, scorching summers and the occasional cyclone. Often, the only sign you're walking on someone's roof is the air vent that's sprouted up next to your boots. While first nation peoples have lived in the central Australian desert for thousands of years, the Coober Pedy we know today wouldn't exist without opals. Miners rushed here in the 1920s, enduring extreme conditions to hunt for the multicolored gems, digging, bulldozing and eventually blasting out earth in a bid to find the elusive seam that would make them rich. Living in Coober Pedy is not just about surviving. It's about carving out a way of life in one of the harshest environments on the planet.
[...] "It's not like we're living thousands of kilometers under the ground," he tells me. "It's pretty similar to living in a normal house." Sam's family, who live in a dugout close to Crocodile Harry's, have solar panels for power -- but those generate only enough electricity for a few hours a day. Diesel handles the rest, he says. "We have to rely on tourists to pay for our fuel," he says. "Gasoline is valuable out here. Fuel is really expensive." That means no fridge running all day and night -- they keep nonperishable food and get the rest from town every day. Otherwise, life is pretty similar to what other 18-year-olds in the city experience. Sam says he can still charge his phone and use the TV "for a bit." "We have internet when the generator's on. Dad's got an Xbox but we don't even try to use the solar for that."
That means no fridge running all day and night.
The average energy drain of modern refrigerator is 25-40 watts. Actual power drain while the compressor is running is 100-150 watts. If they have any power at all on a 24 hour basis they should be able to run a refrigerator, though perhaps not open the door for part of the day to keep the compressor from kicking on. Since they do have power part of the day for sure, a 0.5 kWh battery should cover the refrigerator nicely.
Starships were meant to fly, Hands up and touch the sky - Nicky Minaj
12ga cable can carry 20amps or 480W at 24VDC.
Ah, but the ISSUE is voltage drop over the length of the cable. @ 20 amps, 100 ft of 12ga cable is going to drop more than 25% of the voltage, turning that 24 V into about 17. You lose 6.35 V over that 12ga run. The problem with low voltage systems is voltage drop over distances. To keep 100ft of cable to within 10% voltage loss, you are going to spend a pile on wire, running 8ga, which will get you right at 10% loss @ 24 volts in. Most equipment is OK with about 10% of rated input voltage.
So that 480W in will turn into about 380W at the load using 100 ft of 12ga wire (you will lose about 100W) 12 ga may be SAFE at 20A for fire reasons, but it doesn't mean it's usable in a low voltage system.
This is what killed Edison's DC power business and brought Westinghouse's AC power into common use. With AC you can step the voltage up and down at will using transformers, lowering the current for the same power and lose less power/voltage over the smaller cables. BTW, If you go to a 12 V (13.8 actually) system things get even worse for you, with the loss of over half of your input power and half your voltage trying to push 20 Amps over 12Ga.
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Much of it is very very un-inhabitable. Doesn't change our government(s) pushing for incredibly crazy high immigration rates AND not spending money on infrastructure.
They get paper based GDP growth and 'the numbers go higher' for many things but the actual standard of living quality, job quantity and wage growth is going bad bad bad for people.
They don't care, this is a huge country, shovel em all in! What could go wrong?
(Golly, why are more and more people homeless, unemployed or working 3 separate part time jobs?)