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Holy poo poo, this book description just keeps giving. I wanted to crop only the best bit, but every bit is best.
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Nov 24, 2023 02:14
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Here's an interesting electricity price tool for Finns. You can download your consumption data from Fingrid's Datahub and this website can calculate cost differences to fixed price contracts. https://liukuri.fi/laskuri
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Nov 24, 2023 03:01
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TheMuffinMan posted:have u guys heard of eric dollard https://ericdollardmoonman.ytmnd.com/
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Nov 24, 2023 14:39
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Saukkis posted:Well, the prices sure are volatile. On Friday between 15 and 24 electricity will cost -50c/kWh. Because a Norwegian Kinect Energy send an erronous bid for the Finnish market. Supposedly Nordpool won't redo the bidding so the price will stay. Looks like there was an effect.  
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Nov 25, 2023 07:44
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lol
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Nov 25, 2023 08:02
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TheMuffinMan posted:have u guys heard of eric dollard Eric ------D
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Nov 25, 2023 22:08
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Heard they had some initial startup problems, but seems like they finally got things working. https://twitter.com/pretentiouswhat/status/1732240058600800548?s=20
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Dec 6, 2023 16:55
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anyone know what the net energy of this 4th generation nuclear reactor is
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Dec 7, 2023 05:52
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ok so is net energy gain not the correct phrase here? this reactor ran for days? it's self sustainable and requires little to no added energy to keep going?
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Dec 7, 2023 06:13
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TheMuffinMan posted:anyone know what the net energy of this 4th generation nuclear reactor is I'm reading that  TheMuffinMan posted:ok so is net energy gain not the correct phrase here? This is not a fusion reactor so net energy gain is not a thing. A fission reactor doesn't need to expend a big percentage of its own electric energy output to keep running. Dante80 fucked around with this message at 06:17 on Dec 7, 2023 |
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Dec 7, 2023 06:13
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ah thank you
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Dec 7, 2023 06:17
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Nuclear power. It just works. To quote smarter idiots than I: Hot Rock makes Steam makes Spinny Spin makes Zappy Sparks. 
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Dec 7, 2023 06:43
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There's feed water pumps with some really big motors running them and all the other systems supporting a steam turbine but that consumes only a fraction of the electrical output.
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Dec 7, 2023 16:12
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What makes this a 4th generation reactor? The underlying technology? The fact that it's modular?
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Dec 7, 2023 17:15
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Shooting Blanks posted:What makes this a 4th generation reactor? The underlying technology? The fact that it's modular? Gen 1: the earliest power reactors, basically prototypes of whatever design. Magnox, fast reactors, breeders, whatever. Gen 2: commercialized tech. PWRs, BWRs, RMBK, etc. Gen 3: Evolved/mature variants of the above. Gen 4: The stuff that it's hoped will eventually replace those. These are like fighter jet generations, there aren't any hard carved-in-stone definitions, it's just basically how advanced they are. Specifically this one is a pebble-bed high-temperature gas-cooled reactor. High-temperature means it operates at much higher temperatures than a PWR or BWR, gas-cooled means it's cooling the core with gas (specifically helium), and pebble-bed means the fuel isn't in a fixed configuration, it's a pile of baseball-sized graphite balls each containing a bunch of tiny fuel particles. The latter is really what makes this new; there have been HTGRs before but they used more conventional fuel in a fixed configuration.
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Dec 7, 2023 17:40
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This is also not the first 4th Gen or Pebble Bed reactor, but it is the first one to see commercial operation. I think these might also be the right size and spec to function as a drop-in replacement for some of China's new supercritical coal plants. IIRC they were designed so some future nuclear tech could be used for thermal generation.
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Dec 7, 2023 19:28
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tractor fanatic posted:This is also not the first 4th Gen or Pebble Bed reactor, but it is the first one to see commercial operation. I think these might also be the right size and spec to function as a drop-in replacement for some of China's new supercritical coal plants. IIRC they were designed so some future nuclear tech could be used for thermal generation. I think this is an underestimated benefit. There are plenty of steam turbines around (in coal plants) and replacing the coal boiler with a nuclear boiler would reduce a lot of installation cost.
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Dec 7, 2023 20:36
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4th generation was originally just an initiative to keep Soviet engineers and physicists from ending up in the wrong place, but without developing actual nuclear power plant designs.
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Dec 7, 2023 21:13
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Electric Wrigglies posted:I think this is an underestimated benefit. There are plenty of steam turbines around (in coal plants) and replacing the coal boiler with a nuclear boiler would reduce a lot of installation cost. There's at least a few proposals out there to dig geothermal wells directly on top of old coal-plants to serve as a sort of drop-in replacement.
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Dec 15, 2023 03:00
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M_Gargantua posted:Nuclear power. It just works. I feel like they could use something more efficient than an old tea kettle, but then I'm not a nuclear engineer...
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Dec 17, 2023 15:28
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Nenonen posted:I feel like they could use something more efficient than an old tea kettle, but then I'm not a nuclear engineer... Can you think of another easy to understand symbol for boiling water/making steam?
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Dec 17, 2023 15:43
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Dante80 posted:Can you think of another easy to understand symbol for boiling water/making steam? NotJustANumber99 posted:Heres the plan:
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Dec 17, 2023 16:11
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SpeedFreek posted:Something more like this? I think the kettle is a lot cleaner as a symbol to represent boiling water than this huge diagram, I mean we could also point out that a lightning bolt isn't a good representation for alternating current but that's kind of missing the forest for the trees
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Dec 17, 2023 22:42
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The electron orbit representation of an atom isn't a great representation for fission, they should use these scans of formulae from a nuclear physics textbook:
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Dec 17, 2023 22:47
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QuarkJets posted:The electron orbit representation of an atom isn't a great representation for fission, they should use these scans of formulae from a nuclear physics textbook: 
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Dec 17, 2023 23:43
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QuarkJets posted:I think the kettle is a lot cleaner as a symbol to represent boiling water than this huge diagram, I mean we could also point out that a lightning bolt isn't a good representation for alternating current but that's kind of missing the forest for the trees Trees and forests are weird macro pattern illusions from an atomic perspective. Like fractals emerging from broccoli.
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Dec 18, 2023 00:29
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It's kind of like missing the gluon-hadronic envelope for the nucleons
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Dec 18, 2023 00:43
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Remember a couple of Volts podcasts on this one, nice tech coming online. These hot rocks can glow brighter than the sun. They could also help spell the end of fossil fuels https://edition.cnn.com/2023/12/16/climate/solution-hot-rocks-renewable-energy-battery/index.html quote:Fresno, California CNN —
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Dec 18, 2023 06:49
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crude thermal inertia has been approached before, napkin math usually says no -- like it's not even close great for your house for passive thermal inertia but just cools too drat fast for grid application, and the round trip is pretty bad
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Dec 18, 2023 07:51
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Don't they normally use molten salt for that kinda of thermal storage?
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Dec 18, 2023 08:00
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dr_rat posted:Don't they normally use molten salt for that kinda of thermal storage? yes, with the crucial additional detail that the molten salt vat is heated directly by sunlight that's why round trip efficiency matters even more in this case
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Dec 18, 2023 08:09
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Potato Salad posted:crude thermal inertia has been approached before, napkin math usually says no -- like it's not even close There's that thermal storage company that also has special photovoltaics that also make use on the light emitted by the hot rocks (graphite if I recall?).
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Dec 18, 2023 08:44
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Energy storage is a fascinating topic with a lot of potential but the "it's so simple, why did noone ever try this before?" Projects are hilarious and strangely endearing to me. Our Prof during uni once calculated how you could simply store energy by converting energy and easily available ressources to aspirin, and back. It theoretically worked but was completely inefficient. Other fun ideas that were discussed were high pressure underwater air storage next to offshore wind turbines, a heavy weight in a underground shaft coupled to a generator that would pull it up or let it go down according to need, giant flywheels, and more viable ideas like pump storage or methanol. Viability always ended up being severely limited by complexity, transmission and efficiency, and I see no reason for this to be better in that regard. Son of Rodney fucked around with this message at 11:49 on Dec 18, 2023 |
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Dec 18, 2023 08:52
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The one thing startups like this can engineer well are load-bearing wordsquote:If successful,
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Dec 18, 2023 09:03
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There is some cool stuff you can do with Methanol though. That one at least isn't vaporware.
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Dec 18, 2023 16:19
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M_Gargantua posted:There is some cool stuff you can do with Methanol though. That one at least isn't vaporware. Methanol evaporates real easy actually 
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Dec 18, 2023 16:27
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M_Gargantua posted:There is some cool stuff you can do with Methanol though. That one at least isn't vaporware. You can do even cooler stuff with ethanol.
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Dec 18, 2023 16:50
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I'm assuming anything with moving parts is non viable for energy storage.
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Dec 18, 2023 17:09
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Dante80 posted:Remember a couple of Volts podcasts on this one, nice tech coming online. SpeedFreek posted:I'm assuming anything with moving parts is non viable for energy storage. wolrah fucked around with this message at 21:31 on Dec 18, 2023 |
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Dec 18, 2023 21:18
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| # ? May 9, 2024 17:37 |
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Potato Salad posted:crude thermal inertia has been approached before, napkin math usually says no -- like it's not even close These are mainly intended for in situ industrial heat and power storage/generation, industrial heat alone makes up two-thirds of industrial energy demand and almost one-fifth of global energy consumption. What does the grid or "round trips" have to do with this? Dante80 fucked around with this message at 21:49 on Dec 18, 2023 |
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Dec 18, 2023 21:34
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