All public logs

Combined display of all available logs of the change wiki. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).

02:25, 22 January 2023 Elie talk contribs created page Template:Disclaimer (Created page with "{{{1}}}")
02:08, 22 January 2023 Elie talk contribs created page Electric vehicles/energy (Created page with "Suppose all vehicles were a certain type, how much energy would be needed worldwide? {|class="wikitable" style="margin-bottom:0; padding-bottom:0" !Vehicle type !Powering the vehicles !Manufacturing the vehicles |- |Battery electric vehicles |1.08 terawatts |Status quo + 0.15 terawatts |- |Fuel cell vehicles |2.30 terawatts |unknown |- |Status quo (fossil fuel vehicles, mostly) |3.38 terawatts equivalent |unkn...")
22:44, 21 January 2023 Elie talk contribs created page Electric vehicles (Created page with "Most road vehicles currently run on gasoline or diesel fuel, which cause climate change. One ''possible solution'' is to make vehicles electric. This comes with new challenges that aren't solved yet. ==Generating enough electricity== The vehicles would add an extra load on the power grid. ''How much'' electricity depends on whether the vehicles run on batteries or fuel cells. See this chart. The world ''already'' struggles to generate enough electricit...")
15:17, 19 January 2023 Elie talk contribs created page Template:Banner (Created page with "<div style="border:3px solid #FF0; box-shadow:0 0 1em black"><div style="border:3px solid #00F; font-size:111%">{{{1}}}</div></div>")
13:14, 16 January 2023 Elie talk contribs created page Research:Reduce mineral content of fuel cells (Created page with "Fuel cell vehicles need too many platinum-group metals (PGMs). Some scientists are working on ways to reduce the amount of PGMs, or even eliminate them completely. Hopefully they wouldn't have to be replaced with ''other'' rare minerals. ==Links== * [https://fuelcellsworks.com/news/bosch-fuel-cells-need-1-10-platinum-used-in-current-fuel-cells/ Bosch Fuel Cells need 1/10 platinum used in current fuel cells] * [https://eandt.theiet.org/content/articles/2020/08/hydrog...")
18:19, 15 January 2023 Elie talk contribs created page Fuel cell vehicles (Created page with "Fuel cell electric vehicles, or FCEVs for short, are vehicles powered by hydrogen gas. The fuel cell component takes in hydrogen (H2) and oxygen (O2 from the air), and produces electricity to power the motor. The only exhaust is water vapor (H2O). ==Viability== It's '''uncertain''' whether this can be scaled up enough to replace even half of gasoline-powered vehicles. Potential issues to be dealt with: {|class="wikitable" |#In...")
10:17, 14 January 2023 Elie talk contribs created page File:RooftopSolar1.jpg (Solar panels being installed on a house roof Source: https://www.euractiv.com/section/energy/opinion/how-rooftop-solar-pv-can-help-turn-the-gas-valves-off/ Photographer: Bell Ka Pang)
10:17, 14 January 2023 Elie talk contribs uploaded File:RooftopSolar1.jpg (Solar panels being installed on a house roof Source: https://www.euractiv.com/section/energy/opinion/how-rooftop-solar-pv-can-help-turn-the-gas-valves-off/ Photographer: Bell Ka Pang)
08:49, 14 January 2023 Elie talk contribs created page Solar cars (Created page with "How much would it help to have solar panels built into an electric car? {{dp |<nowiki>car_top.area</nowiki> |<nowiki>2.5 m^2</nowiki> |<nowiki>Surface area of a typical car's roof + hood + trunk</nowiki> |<nowiki></nowiki> }} {{dp |<nowiki>solar_panel.efficiency</nowiki> |<nowiki>17%</nowiki> |<nowiki>Efficiency of an average solar panel</nowiki> |<nowiki>Some solar panels are more efficient than this, but they tend to be expensive and contain more rare metals.</now...")
07:06, 14 January 2023 Elie talk contribs created page File:GasStationRooftopSolar1.jpg (Solar panels on a gas station roof. ''No brand-specific endorsement intended.'' Image source: https://lumossolar.com/solar-gas-station-canopy/)
07:06, 14 January 2023 Elie talk contribs uploaded File:GasStationRooftopSolar1.jpg (Solar panels on a gas station roof. ''No brand-specific endorsement intended.'' Image source: https://lumossolar.com/solar-gas-station-canopy/)
06:59, 14 January 2023 Elie talk contribs created page Rooftop solar/gas stations (Created page with "A gas station roof is potentially a good place to put solar panels. frame ==Viability== In peak sunlight, how long would it take to provide a full charge: {{calc |ev.battery / (sunlight_peak solar_panel.efficiency gas_station_roof.area) |minutes }} Caveats: {{p|- Might take longer due to some minor energy losses. Should <code>li_ion.charge_discharge_efficiency</code> be factored in? - The more solar/challang...")
03:58, 12 January 2023 Elie talk contribs created page File:GHG-Emissions-By-Sector-1200px.webp (Greenhouse gas emissions by sector Source: [//ourworldindata.org])
03:58, 12 January 2023 Elie talk contribs uploaded File:GHG-Emissions-By-Sector-1200px.webp (Greenhouse gas emissions by sector Source: [//ourworldindata.org])
12:33, 6 January 2023 Elie talk contribs created page Solein (Created page with "Solein is food made from air and energy. Yes, this [http://www.solein.com actually exists]. ==Viability== Solein is '''not''' scaleable: * the machinery requires too many rare minerals, especially platinum. Read more * the energy requirements are too high for what can be produced without fossil fuels. Read more ==Nutrition== Solein is a complete protein. ==Yields== If the energy comes from solar panels, the ''protein per acre'' would...") Tags: Mobile edit Mobile web edit
16:06, 3 January 2023 Elie talk contribs created page Hydroelectricity (Redirected page to Hydro) Tags: New redirect Mobile edit Mobile web edit
15:19, 3 January 2023 Elie talk contribs created page Fossil fuels/oil energy (Created page with "Most road vehicles are currently powered by gasoline and diesel, both of which come from refining crude oil. Other industrial processes are also powered by diesel. How does all this look in terms of energy units? {{dp |<nowiki>crude_oil.production</nowiki> |<nowiki>4439 million tonnes/year</nowiki> |<nowiki>Global production of crude oil</nowiki> |<nowiki>Using data from 2019</nowiki> <nowiki> Source: Key World Energy Statistics 2020 (IEA report)</nowiki> }} {{d...")
03:07, 3 January 2023 Elie talk contribs created page Energy demand (Redirected page to Energy demand scenarios) Tag: New redirect
02:52, 3 January 2023 Elie talk contribs moved page Solar challenge 1 to Solar/challenge 1 without leaving a redirect (Subpage makes more sense)
02:49, 3 January 2023 Elie talk contribs created page Tradeoffs of scale (Created page with "There are both '''economies of scale''' and '''diseconomies of scale'''. It can be tempting to fall into an ''ideological trap'' of unconditionally favoring either centralization or decentralization. But it helps to know how the benefits of small-scale vs large-scale do depend on the problem to be solved. ==Examples of tradeoffs== ''This page is incomplete.''")
02:36, 3 January 2023 Elie talk contribs created page Microfactories (Created page with "The tradeoffs of scale have traditionally favored large factories. But it's possible that smaller-scale more-decentralized production might be better in some ways. ''This page is currently incomplete.''")
02:18, 3 January 2023 Elie talk contribs created page Template:En (Created page with "<nowiki>[</nowiki>ELABORATION needed<nowiki>]</nowiki>")
02:15, 3 January 2023 Elie talk contribs moved page Hydropower to Hydro (Want to make short pagenames the standard i.e. solar, hydro, wind, nuclear)
02:00, 3 January 2023 Elie talk contribs created page Solar challenge 1 (Created page with "This is the first challenge presented on the main solar page: How to manufacture enough solar panels without destroying the planet. ==Requirements== Requirements are currently listed on the main solar page. {{x|I might move them to here instead - but for now, I don't want to have to keep the same content updated in 2 places.}} ==Candidates== It might be possible to manufacture a solar panel made of mostly: * Monocrystalline or polycrystalline silicon * Aluminiu...")
01:45, 3 January 2023 Elie talk contribs created page Solar (Created page with "Solar power uses the sun as an energy source. ==Types== * Photovoltaics (PV) (solar panels) - generate electricity * Solar thermal panels - use sunlight to directly heat air or water, without involving electricity * Concentrated solar - produce high heat by focusing enough sunlight into one area. The heat can be then used for generating electricity or for industrial processes. <!-- TALK: maybe also mention here: * combined photovoltaic+thermal panels...")
23:37, 2 January 2023 Elie talk contribs created page New hydro (Created page with "How much new hydropower can be built? Where is it viable? This is a page for some answers. New hydro opportunities might be split into 2 general categories: # Places where hydropower hasn't been ''economically'' viable, even though it's ''geographically'' viable. This might be the case in some developing nations.{{rn}} # Places where hydropower is ''already'' built and powering the local grid, but ''more'' power would be needed if people switch to electric vehicle...")
23:09, 2 January 2023 Elie talk contribs created page Hydropower (Created page with "Hydropower uses the motion of water (typically rivers) to generate electricity. This is overall a green source of energy but is only available in ''some'' parts of the world.{{qn}} Most hydro power plants that can be built, already have been - with some exceptions.")
22:51, 2 January 2023 Elie talk contribs created page Baseload (Created page with "The term "baseload" refers to electricity that has to be available 24/7. This is a challenge for intermittent energy sources like solar and wind. ==How much baseload power do we need?== Most optimistically, only about 10% of global energy has to be baseload. The other 90% consists of ''industry'', ''road vehicles'', ''heating'', etc. In principle, these could run entirely on energy from peak-supply times of day. For example in a mostly-solar scenario...")
20:12, 30 December 2022 Elie talk contribs created page Electric vehicles/fossil fuel powered (Created page with "If electric vehicles are powered with electricity that was generated by fossil fuels, is it worse for the environment than just driving a gas car? {{dp |<nowiki>electric_car.efficiency</nowiki> |<nowiki>100 miles per 34.6 kWh</nowiki> |<nowiki>The "gas mileage" equivalent for an average electric car.</nowiki> |<nowiki>Average Electric Car kWh Per Mile [Results From 231 EVs]</nowiki> <nowiki> ecocostsavings.com › average-electric-car-kwh-per-mile </nowiki>...")
02:32, 28 December 2022 Elie talk contribs created page Heat pumps (Created page with "An electric heat pump is one way to heat a building. It works a lot like air conditioning but in reverse: The hot air goes indoors; the cold air goes outdoors. Heat pumps are '''more energy-efficient''' than electric heaters.{{qn}} ==Research needed for this page== * ''How much'' more energy-efficient can a heat pump be? ** How does this depend on outdoor temperature? * How much energy does it typically take to ''manufacture and install'' a heat pump? *...")
01:43, 28 December 2022 Elie talk contribs created page Rooftop solar (Created page with "Rooftops are a good place to put solar panels, because: * They are close to where the energy is typically used. * They need no extra land (unlike solar farms). That's an environmental footprint avoided. '''Summary:''' * In most cases, rooftop solar ''could'' provide enough energy for '''homes''', other '''buildings''', and '''charging''' electric vehicles. ** Exception: heating in cold parts of the world ** Exception: high-density cities * '''Ha...")
23:31, 27 December 2022 Elie talk contribs created page Solar panel minerals (Created page with "It takes minerals to make solar panels. Some minerals are scarce. This might be an issue if we want to scale up green energy enough to replace fossil fuels. What we need is a full chart of all minerals (and their quantities) involved in all solar panel technologies. Apparently this doesn't exist on the internet already, so we have to make it ourselves. The tables below are currently a work-in-progress. The 3rd column of the tables below is based on a sc...")
22:51, 27 December 2022 Elie talk contribs created page Template:Rn (Created page with "<nowiki>[</nowiki>research needed<nowiki>]</nowiki>")
06:40, 24 December 2022 Elie talk contribs created page Calc:If all vehicles were electric (Created page with "Suppose we keep the status quo of transportation, but make all vehicles electric. This raises some basic questions: * How much electricity would we need to power all the vehicles? * How much energy would it take to manufacture vehicles - both in the short term and long term? * Which critical minerals would we need, and how much of each? * Could the minerals be recycled from vehicles at their end-of-life? ==Powering the vehicles== Electric cars are...")
09:51, 30 November 2022 Elie talk contribs created page Code:fullscreen main.h (Created page with "C header for easy OpenGL programming. Gets rid of most boilerplate code. ==Code== <syntaxhighlight lang="c"> ** Elie's OpenGL wrapper Creates a fullscreen vsync'd context with game-style access to keyboard & mouse. Version 1.1 **: #pragma once // This header file implements main(). // Here are the functions you must define in your own code: void init(); void draw(); void done(); /** Notes: * * The init() function is called once at startup. This is the place...")
09:45, 30 November 2022 Elie talk contribs created page File:font.data-uint8-1004x19 (Bitmapped font file used by Code:text-quads.h)
09:45, 30 November 2022 Elie talk contribs uploaded File:font.data-uint8-1004x19 (Bitmapped font file used by Code:text-quads.h)
09:36, 30 November 2022 Elie talk contribs created page Code:text-quads.h (Created page with "<syntaxhighlight lang="c"> // text-quads.h // Functions for drawing text in OpenGL, using textured quads. #define TQ_TEXTURE_WIDTH 1004 #define TQ_TEXTURE_HEIGHT 19 #define TQ_TEXTURE_FILENAME "font.data-uint8-1004x19" // DEPENDENCY: This texture file. /* Copyright 2022, Elie Goldman Smith This program is FREE SOFTWARE: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either ver...")
09:34, 30 November 2022 Elie talk contribs created page Code:nodes.c (Created page with "<syntaxhighlight lang="c"> /*** This is my new graph nodes program. I don't know what to call it yet. To compile: gcc nodes.c -o nodes -ffast-math -O -lm -lGL -lglut -lpthread This program has runtime dependencies: File in working directory: "font.data-uint8-1004x19" Installed packages: 'zenity' and 'leafpad' Copyright 2022, Elie Goldman Smith This program is FREE SOFTWARE: you can redistribute it and/or modify it under the terms of the GNU General...")
21:45, 12 November 2022 206.253.78.9 talk created page Talk:Nodes (Created page with "==Start of something== <syntaxhighlight lang="html"> <html><head><script> function $(id) { return document.getElementById(id); } focus = 0; next = 1; nodes = 0,1,0.5; connections = []; function focusOn(i) { focus = i; } function newNodeFrom(i){ connections.push([i, next]); nodes[next++]=[nodes[i][0]+Math.random()*0.01, nodes[i][1]+Math.random()*0.01]; } function newNodeTo(i) { connections.push([next, i]); nodes[next++]=[nodes[i][0]+Math.random()*0.0...")
04:39, 11 November 2022 Elie talk contribs created page File talk:food-funnel.png (Created page with "==This diagram doesn't currently include fish.== Here's one way that fish could maybe be included in future versions of this diagram: * The top part would be renamed from 'crops harvested' to 'production primary', and would include ''wild-caught'' fish. * The 'animal feed' would include any human-edible calories fed to ''farmed'' fish. * The 'animal products' produced would include the ''farmed'' fish. To put things in perspective, seafood contributes about 12g protein/d...")
20:01, 9 November 2022 Elie talk contribs created page Minerals (Created page with "In pursuit of green energy technology, we need a significant amount of scarce metals. [https://www.iea.org/reports/the-role-of-critical-minerals-in-clean-energy-transitions/mineral-requirements-for-clean-energy-transitions This article] is a good start, but we should try to quantify the situation more rigorously for "full replacement of fossil fuel energy" scenarios.")
06:39, 8 November 2022 Elie talk contribs created page Zero food-feed competition (Created page with "Cows, goats and sheep can digest fibre and use it as calories. These animals can thus eat a few things that don't compete with food production: # Crop residues (also known as biomass waste) which are the fibrous leftover parts of food crops we have to grow anyway. # Grass from pasture lands. This feed can't be eaten by humans, chickens, or pigs. {{x|Except in very small quantities for roughage only. Humans, chickens and pigs can't extract any s...")
21:35, 4 November 2022 Elie talk contribs created page Why Bitcoin's energy usage is directly proportional to its price (Created page with "By design, bitcoin mining pays out exactly 6.25 BTC, every 10 minutes - to someone, somewhere in the world. {{x|In practice, this usually gets split between many people in a mining pool.}} The more "work" a miner does, the greater their chances of getting these bitcoins. The network automatically adjusts the mining difficulty. If mining is too hard, it would be so unprofitable that everyone would stop mining - this would cause the mining difficulty to automatically...")
21:33, 4 November 2022 Elie talk contribs created page Talk:Wind (Created page with "==Sulfur hexafluoride== wind power uses sf6? * what's it for: electrical switching apparently * how much is it currently using * how much more would it currently use if wind or solar powered the world * total ghg per terajoule: is it at least better than coal? * any alternatives? ~~~~")
06:42, 4 November 2022 Elie talk contribs created page the change wiki:Redesigns (Created page with "This page is for ways the wiki could be completely redesigned. ==Wiki engine== make a new wiki engine * use case ** ultra short "pages" that heavily link to each other ** the whole wiki as one gigantic directed graph (flow chart style) * text node ** displayed as a rounded square *** zooming in increases width but left-right-clamped to screen *** if (width clamped) height = whatever needed for text. but also adjusted so the text doesnt suddenly shift vertically when you...")
02:41, 4 November 2022 Elie talk contribs created page Drug legalization (Created page with "==Dilution== One method to legalize harder drugs (such as cocaine, MDMA, heroin, methamphetamine, etc) it to have them sold ''only'' in diluted form, in regulated drinks: * The dosage should be low enough that it's impossible to overdose without consuming at least 5 litres (which is impossible for any stomach to hold at once). * The drink should not be flavored or labelled in a way that appeals to children.  This is very similar to how...")
02:29, 4 November 2022 Elie talk contribs created page Energy storage/specs (Created page with "{|class="wikitable" | !Type !Specific energy (watt hours per kg) !Specific power (watts per kg) !Charge time (minutes) !Self-discharge (% per month) !Roundtrip efficiency (%) !Lifespan (charge-discharge cycles) !Lifespan (years shelf life) |- |Lithium-ion batteries |- |Lead-acid batteries |- |Iron-redox flow batteries |- |Flywheels |- |Hydrogen gas + fuel cell |- |Hydrogen gas + combustion engine |- |Hydrog...")
23:11, 31 October 2022 Elie talk contribs created page Energy demand categories (Created page with "==Electricity that must be available 24/7== * Home electricity usage ** Except for heating and cooling - those have other options (see below). * Commercial electricity usage (includes retail stores, restaurants, offices, and the service sector in general), except for heating and cooling (those have other options - see below). ** Except for heating and cooling - those have other options (see below). * Trains for public transit ==Electricity that does not have to...")
20:50, 27 October 2022 Elie talk contribs created page File:mont-royal-vs-quebec-scale.ogv (Understanding the scale of city greenspace vs country greenspace.)