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    TUHOKlimaticka zmena / Thank you so much for ruining my day
    SHEFIK
    SHEFIK --- ---
    trocha budoucnosti

    https://www.powermag.com/global-offshore-wind-capacity-slated-to-multiply-eight-fold-by-2030/

    Offshore wind capacity is slated to surge to more than 234 GW by 2030—a remarkable boost when compared to the current 29.1 GW that was installed worldwide at the end of 2019, the Global Wind Energy Council (GWEC) said in an August-released analysis of the sector.

    ...

    Offshore wind LCOE, notably, has tumbled in recent years, owing to installations of larger turbines. “When the bigger offshore turbine is released with a higher nameplate capacity, rotor diameter and tower height, the technical capacity factors are higher, which in turn increases the annual energy production (AEP),” the organization explained. “Although larger turbines per unit are more costly than smaller ones, it saves the CAPEX [capital expenditures] for foundations, cables and installation as well as the OPEX [operational expenditures] due to lower [numbers of] turbine units.”

    ...

    The group said that stored electricity can be electrolyzed into hydrogen to be used as feedstock to produce bulk chemicals like methanol or ammonia for industrial processes or combined with captured CO2 to make carbon-neutral liquid fuels such as crude, gasoline, diesel, and aviation fuels. It can also generate heat through heat pumps or electric boilers for houses and factories. Or it can be stored in underground formations like salt domes and fed back to the grid as needed. But while power-to-x has been shown to be technically feasible, the technology is “limited by the scale of projects, making it too expensive to be widely deployed at this stage.” However, the industry is primed to take the next step, “so it’s just a matter of ‘when,’ ” it said.
    XCHAOS
    XCHAOS --- ---
    SHEFIK: určitě ne první, vygoogli si Sea Bubbles. Hydrofoil efekt je úžasná věc, hlavně na stojatých vnittozemských vodách, pokud se podaří při rychlostech kolem 40 km/h je to úžasně efektivní mód dopravy... (lodím chybí obvykle právě rychlost...)
    SHEFIK
    SHEFIK --- ---
    nedavno jsem nad tim premejslel, kdyz neprosly panely na silnici, proc ne nad ni. snizi se tepelna zatez vozovky, hluk, svede se voda a snih bezpecne mimo, nemusi se na solar zabirat puda atd.

    Photovoltaics for highways – pv magazine International
    https://www.pv-magazine.com/2020/09/01/photovoltaics-for-highways/
    TADEAS
    TADEAS --- ---
    TADEAS:

    Up to half of world's water supply stolen annually, study finds | Murray-Darling Basin | The Guardian
    https://amp.theguardian.com/.../aug/27/up-to-half-of-worlds-water-supply-stolen-annually-study-finds
    SHEFIK
    SHEFIK --- ---
    jeste lepsi nez sme doufali

    Electric Cars Indirectly Emit Much Less Carbon Than Previously Reported
    https://insideevs.com/news/441944/electric-cars-emit-much-less-carbon/amp/

    In other words, electric cars would indirectly emit much less carbon and other gases than previous studies based on six main mistakes they made.

    ...

    1) The first one is an exaggeration in estimating the amount of carbon released in battery production. According to the Dutch researchers, the most accepted references to it (Buchal, Karl and Sinn, ADAC, ÖAMTC, and Joanneum Research) assume the process emits 175 kg of CO2 per kWh of battery. 

    All of them are based on a Romare and Dahllöf study from 2017. In 2019, that study was updated and lowered its estimate of carbon dioxide emitted in battery manufacturing from 175 kg/kWh to 87 kg/kWh. That alone reduced GHG emissions in half.

    ...

    2) The second mistake in establishing EVs’ carbon footprint is an underestimation of battery packs’ lives. The same studies we mentioned before believe EVs have an average lifespan of 150,000 km (93,200 mi).

    We have already spoken about million-mile batteries from SVolt and CATL that will soon be in production EVs. Even before that, the Dutch report estimates the current electric car life in 250,000 km. And it will improve quickly.

    ...

    3) The third mistake is assuming that the power grid will always be as dirty as when each EV hit the road for the first time. The truth is that it is getting cleaner. By coincidence, BloombergNEF published on September 1 that solar and wind represented 67 percent of all new power capacity added in the world in 2019. Fossil fuel sources of energy for electricity shrunk 25 percent. Remember that we are talking about a single year.

    ...

    4) What they say is that NEDC was a standard that allowed Dieselgate to happen and which is still the standard adopted by studies that criticize electric cars. WLTP would bring the hope of less biased tests.

    ...

    5) The fifth error they point out makes perfect sense. If people calculate how much carbon dioxide battery manufacturing emits, why not calculate how much is of it is generated when breaking oil down into its derivatives? 

    ...

    6) Finally, they argue that insisting on combustion engines is a mistake because they cannot improve much further. Even if we discover a revolutionary synthetic renewable fuel, they will not get much more energy efficient. A fair amount of it will be lost, while electric cars are efficient by nature. Any serious study on EV indirect emissions would have to consider that. 
    KEB
    KEB --- ---
    PAD: já si čím dál víc myslím, že Dukovany dopadnou, jak kanál Odra Dunaj cosi. Prodrbe se na tom mrtě milionů na studiích atd a pak se to shodí že stolu, že je to blbost.
    SHEFIK
    SHEFIK --- ---
    TADEAS: ja se na tohle tesim. nevim, ktery reseni nakonec zvitezi, ale predstava levny desalinace podel pobrezi afriky, nebo i jinde na svete ma potencial terraformingu :)
    TADEAS
    TADEAS --- ---
    v200720 1 Was Limits right Randers to ISDC 2020
    http://www.youtube.com/watch?v=6_vSGUAZiC8


    Randers compares the 12 scenarios from The Limits to Growth (1972) with actual development from 1970 to 2020 - and onwards to 2052. The world is on a path similar to the "pollution crisis scenario" in Limits.



    v200721 MODCAP model - refmodes basic mechanisms Randers to ISDC 2020
    http://www.youtube.com/watch?v=UKfBVckG_Us


    Randers describes the four refence modes and the four basic mechanisms that form the core conceptualisation of the current versionof MODCAP - A system dynamics model of a modern capitalist economy.
    TADEAS
    TADEAS --- ---
    TADEAS:

    Emerging from Emergency 2.0, The Club of Rome & Planetary Emergency Partners
    http://www.youtube.com/watch?v=4YlHOxIWilA
    PAD
    PAD --- ---
    SHEFIK: ten system of Froniusu (urcite existuji i alternativy, ja se dival jen na nej a nechal toho, protoze zatim je to dost drahe) prave pracuje i s baterkou. Jde o to minimalizovat pocet nabijecich cyklu, aby jsi nenabijel baterku a pak ji vybijel napr. na bojler. Anebo aby jsi ji mel nabitou ve chvili, kdy budes mit vetsi odber, nez predpokladany proud z panelu (maji tam nejaky model, ktery se uci tvou spotrebu a to kombinuji s pocasim a statistikami). U te pracky nebo mycky si sam muzes nastavit ochotu cekat. Pro nekoho to bude 0, u jineho (treba me) to bude klidne +- 10 hodin. Totez plati pro dalsi spotrebice. Existuje i standard, kterym se prave vsechny ty spotrebice spolu dorozumi.
    --
    Realita obyc. ceskeho cloveka je takova, ze na tohle nemam (a zaroven mi to prijde takove moc komplikovane a mozna i tim nachylne na to, ze se to zkazi). Sam dobre uvidim, kdy sviti, tak si pracku zapnu podle toho. DTTO u ostatnich spotrebicu. Jedine, co je treba, je nejak presmerovavat prebytky, kdyz odber neni. Osobne to planuju vyresit radiovymi zasuvkami a nejakym vytezovacem. Jet v noci z gridu mi fakt nevadi, ten odber v noci mam minimalni (tak do 300W). To se ovsem asi zmeni, jakmile se mi zacne objevovat na vyuctovani cena za dobrodruzstvi v Dukovanech, uvidime.
    TADEAS
    TADEAS --- ---
    SHEFIK:

    A sunlight-responsive metal–organic framework system for sustainable water desalination
    https://www.nature.com/articles/s41893-020-0590-x
    PAD
    PAD --- ---
    OMNIHASH:
    DZODZO: ono se tomu rika sice nocni proud, ale spravne je nizky tarif a ten kopiruje prave tu poptavku (inverzne) - treba u me je to brzo rano, pozde v noci a po obede. je to takovy primitivni (oproti smart elektromerum), ale spatny system to neni.
    DZODZO
    DZODZO --- ---
    OMNIHASH: takze maju uz v tej cene NT zahrnute pripadne straty? lebo dnes som sa bavil s tym kolegom co som ho prehovoril, aby si nechal postavit FVE (uz ju ma, akurat caka na vymenu elektromeru) a ten riesi ako napajat bojler, aby sa mu zbytocne nenahrievala voda elektrinou z baterky ale z NT, ktory ma 20 hodin denne

    inak ma 5,76kWh baterku o rozmeroch 35x35x80 cm... takze aj tie uloziska sa uz posunuli trochu dalej, ja mam 2,4kWh vo formate 4U do racku
    OMNIHASH
    OMNIHASH --- ---
    KEB: tak on už reálně noční proud nejede, akorát naši distributoři se odmítaj vzdát tohodle léta zavedenýho odběru. Na energetický burze se mění cena nonstop podle převisu nabídky/poptávky.
    KEB
    KEB --- ---
    SHEFIK: jo takhle jo, pokud investujes do tvrdého zdroje tak ano. Přes den krmis všechno fve a jádro dělá na sklad. A v noci kdy nesvítí, zvedneš poptávku. Tomu rozumím. Důležité je aby ta elektrárna nestála jen tak.

    Nicméně do budoucna, kdy budou tvrdé zdroje ubývat, tak se to bude muset proměnit nemyslíš?
    SHEFIK
    SHEFIK --- ---
    KEB: kdyz zainvestujes do jaderky nebo uhelky, mas naky ongoing costs, jak provozni, tak vcetne odpisu majetku. kdyz je budes na noc vypinat, nevyuzijes cely potencial, protoze mas nejakou zivotnost a pozemek vlastne lezi v noci ladem.

    proto se na noc se zlevni, tim navysis poptavku a maximalizujes vynosy.

    fve to imho moc nevyresi, protoze domacnosti nejvic spotrebovavaji prave vecer a rano, kdy slunce neni. takze potrebujes vitr, thermal, nebo nakou formu storage
    KEB
    KEB --- ---
    SHEFIK: já trochu nechápu tu logiku nočního proudu. Ano v minulosti, kdy elektrárny hrnou durch, to smysl mělo. V noci lidí spí, nesvítí, nevaří atd.

    V budoucnu pokud dojde k rozvoji fve, tak bude nadvýroba El. Ve dne kdy svítí a to už se dá řešit výrazně jednodušeji. Nebo mi něco uniká?
    DZODZO
    DZODZO --- ---
    pracka zas tak moc nezere, iba na zaciatku na nahriatie vody a pak nieco malo na roztacanie bubna, taky najkonstantnejsi zrut energie je lednicka
    SHEFIK
    SHEFIK --- ---
    PAD: nejpozdejc do 4 let to pride, viz https://www.statista.com/statistics/883118/global-lithium-ion-battery-pack-costs/

    za poslednich 8 let (2011-2019) doslo k 588% zlevneni battery packu

    a elektrina pujde spis nahoru, nez dolu

    PAD: tohle je dobra myslenka, ale imho nerealna, resp. realna asi jen castecne - budou branit moznosti lidi - ze svy zkusenosti v tejdnu makam a sem rad, ze du spat pred 11tou, na noc pracku nezapinam, sousedi ani rodina by nebyly nadseny - neni to jen o pohodli, spat v klidu je proste hygienicka nutnost/norma. takze zbejva vikend, kdy nalozim po sobe 3+ v prubehu vikendu. s detma se taky moc planovat kdy se uspinej neda a obleceni do zasoby kupovat nechci, to problem nevyresi (dalsi nabytek, vetsi byt, vetsi uhlikova stopa atd.). nektery lidi si muzou planovat lip, kdy budou prat, ja spis planuju prani podle toho, kdy mi to zivot dovoli. asi by se organizace lidsky spolecnosti nemela tocit podle levnyho proudu

    stejny s myckou, mobilem apod. resenim sou jedine baterky, a pak jejich inteligentni dobijeni

    PAD
    PAD --- ---
    TADEAS: jadrem je LiFePO4 baterka, uz jsem to tady pocital par tydnu dozadu - pri dnesnich cenach se to nevyplati. Vyslo mi, ze by to muselo cca o 40% zlevnit (anebo elektrina by umerne tomu musela zdrazit), aby se to vyplatilo. IMHO ne nerealny, ale stejne si nejsem jisty, jestli tech 40% neni priliz optimistickych, protoze jsem pocital s tim, ze ti ty panely tu energii proste dodaji v prumeru behem dne. Pokud by jsi musel cely system trochu predimenzovat, aby jsi vykryl spatne pocasi v zime, kdy nekolik dni muze byt fakt mizerne, cele to muze zacit vychazet docela jinak (hur).
    Kliknutím sem můžete změnit nastavení reklam