The news is full of the record low oil price due to the COVID-19-related drop in demand. The benchmark Brent crude dipped below $20 a barrel, while West Texas intermediate entered negative pricing. We’ve all become oil market watchers overnight, and for some of us that’s led down a rabbit hole of browsing to learn a bit about how oil is extracted.
Many of us will have seen offshore oil platforms or nodding pumpjacks, but how many of us outside the industry have much more than a very superficial knowledge of it? Of all the various technologies to provide enlightenment of the curious technologist there’s one curious survivor from the earliest days of the industry that is definitely worth investigation, the jerk line oil well pump. This is a means of powering a reciprocating pump in an oil well not through an individual engine or motor as in the pump jacks, but in a system of rods transmitting power over long distances from a central location by means of reciprocating motion. It’s gloriously simple, which has probably contributed to its survival in a few small-scale oil fields over a century and a half after its invention.
Continue reading “Oil Wells Done Rube-Goldberg Style: Flatrods And Jerk Lines”
Scientists found a surprising amount of lead in a glacier. They were studying atmospheric pollution by sampling ice cores taken from Alpine glaciers. The surprising part is that they found more lead in strata from the late 13th century than they had in those deposited at the height of the Industrial Revolution. Surely mediaeval times were supposed to be more about knights in shining armour than dark satanic mills, what on earth was going on? Why was the lead industry in overdrive in an age when a wooden water wheel represented high technology?
The answer lies in the lead smelting methods used a thousand miles away from that glacier, and in the martyrdom of a mediaeval saint.
Continue reading “How Can Heavy Metal Fly?”
If you’re like us, understanding the processes and methods of the early Industrial Revolution involved some hand waving. Take the blast furnace, which relies on a steady supply of compressed air to stoke the fire and supply the oxygen needed to smelt iron from ore. How exactly was air compressed before electricity? We assumed it would have been from a set of bellows powered by a water wheel, and of course that method was used, but it turns out there’s another way to get compressed air from water: the trompe.
As [Grady] from Practical Engineering explains in the short video below, the trompe was a clever device used to create a steady supply of high-pressure compressed air. To demonstrate the process, he breaks out his seemingly inexhaustible supply of clear acrylic piping to build a small trompe. The idea is to use water falling around a series of tubes to create a partial vacuum and entrain air bubbles. The bubbles are pulled down a vertical tube by the turbulence of the water, and then enter a horizontal section where the flow evens out. The bubbles rise to the top of the horizontal tube where they are tapped off by another vertical tube, as the degassed water continues into a second vertical section, the height of which determines the pressure of the stored air. It’s ingenious, requiring no power and no moving parts, and scales up well – [Grady] relates a story about one trompe that provided compressed air commercially for mines in Canada.
Need an electricity-free way to pump water instead of air? Check out this hydraulic ram pump that takes its power from the water it pumps.
Continue reading “Get Compressed Air From Falling Water With The Trompe”
Cryptocurrencies: love them, hate them, or be baffled by them, but don’t think you can escape them. That’s the way it seems these days at least, with news media filled with breathless stories about Bitcoin and the other cryptocurrencies, and everyone from Amazon to content creators on YouTube now accepting the digital currency for payments. And now, almost everyone on the planet is literally bathed in Bitcoin, or at least the distributed ledger that makes it work, thanks to a new network that streams the Bitcoin blockchain over a constellation of geosynchronous satellites.
Continue reading “Radio Free Blockchain: Bitcoin From Space”
Much to the chagrin of local historians, the city of Scranton, Pennsylvania is today best known as the setting for the American version of The Office. But while the exploits of Dunder Mifflin’s best and brightest might make for a good Netflix binge, there’s a lot more to the historic city than the fictional paper company. From its beginnings as a major supplier of anthracite coal to the introduction of America’s first electrically operated trolley system on its streets, Scranton earned its nickname “The Electric City” by being a major technological hub from the Industrial Revolution through to the Second World War.
Today, the mines and furnaces of Scranton lie silent but not forgotten. In the 1980’s, the city started turning what remained of their industrial sites into historic landmarks and museums with the help of State and Federal grants. I recently got a chance to tour some of these locations, and came away very impressed. They’re an exceptional look into the early technology and processes which helped turn America into an industrial juggernaut.
While no substitute for visiting these museums and parks for yourself, hopefully the following images and descriptions will give you an idea of what kind of attractions await visitors to the modern day Electric City.
Continue reading “Hackaday Visits The Electric City”
Exploiting the resources of the rock-strewn expanse of space between Mars and the outer planets has been the stuff of science fiction for ages. There’s gold in them ‘thar space rocks, or diamonds, or platinum, or something that makes them attractive targets for capitalists and scientists alike. But before actually extracting the riches of the asteroid belt, stuck here as we are at the bottom of a very deep gravity well that’s very expensive to climb out of, we have to answer a few questions. Like, how does one rendezvous with an asteroid? What’s involved with maneuvering near a comparatively tiny celestial body? And most importantly, how exactly does one land on an asteroid and do any useful work?
Back in June, a spacecraft launched by the Japanese Aerospace Exploration Agency (JAXA) finally caught up to an asteroid named Ryugu after having chased it for the better part of four years. The Hayabusa2 was equipped to answer all those questions and more, and as it settled in close to the asteroid with a small fleet of robotic rovers on board, it was about to make history. Here’s how they managed to not only land on an asteroid, but how the rovers move around on the surface, and how they’ll return samples of the asteroid to Earth for study.
Continue reading “The Science Of Landing On An Asteroid”
Distributed computing is an excellent idea. We have a huge network of computers, many of them always on, why not take advantage of that when the user isn’t? The application that probably comes to mind is Folding@home, which lets you donate your unused computer time to help crunch the numbers for disease research. Everyone wins!
But what if your CPU cycles are being used for profit without your knowledge? Over the weekend this turned out to be the case with Showtime on-demand sites which mined Monero coins while the users was pacified by video playback. The video is a sweet treat while the cost of your electric bill is nudged up ever so slightly.