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    TUHOKlimaticka zmena / Thank you so much for ruining my day
    YMLADRIS
    YMLADRIS --- ---
    38 ℃ (100.4 ℉)
    The temperature last Saturday in Verkhoyansk, Siberia. If verified, it breaks the record for the highest temperature ever recorded in the Arctic. (The Washington Post | 5 min read)


    https://www.washingtonpost.com/weather/2020/06/21/arctic-temperature-record-siberia/
    TADEAS
    TADEAS --- ---
    PAD: co je nerealny? nevim ted, na co presne reagujes. ze si nemuzes dovolit to sezonni ukladani do vodiku? to chapu, je to drahy. kdykoliv se nevyuziva uz vybudovana dostupna infrastruktura, ale ta infrastruktura se internalizuje (az do offgrid reseni), tak na sebe investor prenasi naklady na tuhle infrastrukturu.

    ty navrhujes zalozit udrzitelnost vytapeni na dreve/biomase. ok, v nejakym kontextu to dava smysl a jelikoz nam tu zkolabovaly plantaze stromu aka lesy, je to aktualne taky velmi levnej zdroj. drevo uz tolik nefunguje v kontextu koncentrovanejch sidel, rekneme ze na provoz takovyhohle domu co rikas potrebujes energeticky vyuzivat treba hektar lesa.

    co se tyce elektriny, vzdycky musis vymyslet jak vyrobu tak skladovani, a to sezonne, pokud se bavime o tom, ze se to generuje lokalne. samozrrjme se to da vzdycky odnekud importovat.

    je tam otazka ty automatizace - peletky si musi nechat privyzt, takze je kupujes, nekdo je udela, je to importovany palivo. nebo si je delas sam a pak musis intenralizocat tuhle infrastrukturu, starat se o ni a udrzovat ji v provozu. nebo se musis kazdodenne starat o zplynovaci kotel na drevo. drevem taky nemuzes dochladit, narozdil od TC na elektrinu. chlazeni tu bude za chvili stejny tema jako vytapeni.

    samozrejme, nejlip se to vyresi snizenim naroku na rozlohu budov atd. a snizenim prubezny energeticky narocnosti. ale v principu tu furt podle me zustava otazka, jak tyhle infrastruktury zivit energii aniz bychom spalovali produkci biosystemu, musime to brat z toho slunecniho kanalu rovnou.
    PAD
    PAD --- ---
    PAD: m3 jsem mel na mysli
    PAD
    PAD --- ---
    TADEAS: Je to super, snad se toho doziju. Zatim je to v ceskych podminkach nerealny. IMHO mnohem vetsi leverage daji uspory - zateplovani, mozna i zmenseni staveb (fakt nechapu, k cemu maji lidi dnes mnohdy i >200m2 plochy), fotovoltaika a tam, kde to lze, tak drevo.
    JIMIQ: To je cena celyho baraku, pokud ses ochotny leccos udelat sam. Nikdy se to nema sanci zaplatit. Cena dreva je dnes 400korun/m2 vcetne dopravy, cili topeni a TUV (okolo 70-80% veskere energie, co domacnost spotrebuje), muzes poresit za 5000 korun/rok (pri tepelnych ztratach ~8kw). Pokud leto pokryjes fotovoltaikou, tak jeste vic. Ani to nemusi byt pasiv. Nevyhodou je skladovani a pracnost (ta muze byt pro nekoho vyhoda).

    Chci tim celym jen rict, ze k udrzitelnejsimu bydleni neni treba high tech ani hodne penez. Staci jen chytre poskladat to, co uz je dostupne a obetovat trochu prace.
    KEB
    KEB --- ---
    Americká aktivistka Erin Brockovichová slaví šedesátiny - Ekolist.cz
    https://ekolist.cz/cz/zpravodajstvi/zpravy/americka-aktivistka-erin-brockovichova-slavi-sedesatiny

    Patří to sem jen velmi okrajově, ale i tak gratulujeme k životnímu jubileu :-)
    SUMAC
    SUMAC --- ---
    https://www.nature.com/articles/s41467-020-16941-y

    For over half a century, worldwide growth in affluence has continuously increased resource use and pollutant emissions far more rapidly than these have been reduced through better technology. The affluent citizens of the world are responsible for most environmental impacts and are central to any future prospect of retreating to safer environmental conditions. We summarise the evidence and present possible solution approaches. Any transition towards sustainability can only be effective if far-reaching lifestyle changes complement technological advancements. However, existing societies, economies and cultures incite consumption expansion and the structural imperative for growth in competitive market economies inhibits necessary societal change.

    vedecky prokazany a v Nature opublikovany zaver, ze bohati znicili planetu.

    TADEAS
    TADEAS --- ---
    JIMIQ: 80% casu, ale z hlediska spotrebovany energie to bude vic, protoze to je cast roku kdy ji nejvic potrebujes. takze v tom smyslu ten energetickej mix kterej ti zajistuje grid je to, co pouzivas. takze pokud chces ted dekarbonizovany high-tech teplo/chlad, je to mozny, a drahy. :)
    JIMIQ
    JIMIQ --- ---
    no však píšu 80% - to nechává 2,5 měsíce z gridu. A kvůli 20% investovat dalších 50% navíc je nesmysl, že jo. To si radši počkám, až to bude sériová výroba a bude to stát třetinu
    TADEAS
    TADEAS --- ---
    JIMIQ: i s tou kombinaci pasiv + TC ve vrtu to porad vychazi tak, ze potrebujes nejaky jednotky MWh elektriny/rok na pohon systemu, hlavne v chladny casti roku - kde je vezmes? bud to bude vychazet virtualne, tj. pocitas napr. pouze vyrobu FVE, ktera ti ze strechy takovy mnozstvi energie bez problemu vyrobi a tvoje uloziste je grid. nebo chces aby to fungovalo nebo vychazelo offgrid, pak musis resit sezonni ulozeni a podle me v soucasnosti neni jina (technologicka) cesta nez ten vodik. nebo to muzes zalozit napr. na peletkach, coz je taky obhajitelny, ale pak to nebude TC. plus vetsi narok na prostor (peletky), ktery se musej odnekud privyzt nebo zpracovat z lokalniho dreva. to je co se tyce vytapeni, elektrinu taky musis nejak vykrejt sezonne, pokud chces soucasnes standard spotreby. nicmene v cechach partnera zatim nemaj, prej nejdriv rakousko a svycarsko.
    JIMIQ
    JIMIQ --- ---
    ale jako jo, v Německu dotace 12500, tak když stačí ta levnější varianta jseš na 47500, to je tak půl až celoroční plat podle druhu zaměstnání. To je pěkný. Takže u nás by museli zlevnit 3x... takže 2025? :D
    JIMIQ
    JIMIQ --- ---
    TADEAS: “neustale”, chci mit pasiv, TC a FVE, 80% snad pokreju i kdyz mozna ne hned
    TADEAS
    TADEAS --- ---
    TADEAS:

    WEBINAR - Fuel cells and hydrogen: the missing link to decarbonise Europe’s building stock?
    https://www.youtube.com/watch?v=JJrXtu3JzG4


    WEBINAR: Fuel cells and hydrogen - the missing link to decarbonise Europe’s building stock? (Tuesday 26 May | 11:00 to 12:00 CET) - PACE
    http://www.pace-energy.eu/...-to-decarbonise-europes-building-stock-tuesday-26-may-1100-to-1200-cet/
    TADEAS
    TADEAS --- ---
    JIMIQ: jj, energeticky nesobestacnyho baraku do kteryho neustale importujes energie/materialy. je to na zacatku.
    JIMIQ
    JIMIQ --- ---
    TADEAS: to by se mi líbilo, 60-90 tisíc eur teda... to je skoro polovina ceny baráku :D
    YMLADRIS
    YMLADRIS --- ---
    Who Is Responsible For Climate Change? – Who Needs To Fix It?
    https://www.youtube.com/watch?v=ipVxxxqwBQw


    Gates konecne zasponsoroval climate change serii od kurzgesagtu, zde prvni dil, polopaticka videa pro kazdeho (dodelejte nekdo ceske titulky)
    TADEAS
    TADEAS --- ---
    Green Heating and Cooling | Hydrogen
    https://hydrogeneurope.eu/green-heating-and-cooling

    Heating and cooling consume half of the EU's energy. Although this sector aims at being a clean and low carbon energy, 75% of the fuel it uses still comes from fossil fuels (nearly half from gas). The sector is based on a vast, European interconnected gas infrastructure which delivers the needed energy to heat homes in the EU.

    If Europe wants to decarbonise heating and cooling it faces several options:
    Through the electrification of heating with heat pump or electric heaters or via the introduction of renewable gas such as hydrogen or biogas.

    The electrification options are feasible for a number of building (new builds only and that are well insulated and where low temperature heating through the floor is possible) but the majority of the building stock today is not compatible. Moreover, the demand of heat is concentrated in winter time when renewables are less available. Additionally, a complete electrification of heat would imply that the gas grid is no longer used and becomes a stranded asset.

    ...

    There are three ways to decarbonise the gas grid: Green and Decarbonised Hydrogen:

    * Green hydrogen through water electrolysis using renewable electricity.
    * Decarbonised hydrogen through natural gas reformation with carbon capture and storage.
    * By-product hydrogen taken from an unavoidable source of hydrogen which would have been otherwise flared or ineffectively burnt for electricity generation.

    The gas infrastructure decarbonisation through the introduction of high share of such hydrogen, firstly through a blending with natural gas and in the future possibly to a complete conversion to 100% hydrogen system is a reality that needs to be acknowledged and pushed for.

    Additionally, this enables a greater integration of renewable energy sources and a direct reduction of greenhouse gas emissions. Furthermore, due to the increased share of intermittent renewable energy sources (wind and solar) in the European energy system, the utilisation of the vast gas infrastructure as an energy storage asset is an opportunity (the green gas being used in homes but also in gas-fired power plants (link to sectoral integration).

    Hydrogen represents the optimal overall solution for long-term, carbon-free seasonal storage.
    TADEAS
    TADEAS --- ---
    ad homescale vodik, co lze v nemecku poridit (v cechach nemaj partnera, nechcete nekdo rozjet .)

    TADEAS

    TADEAS
    TADEAS --- ---
    TADEAS, TADEAS:

    Hy2green - Das Energiespeicher-System für natürliche Energiequellen : Hy2green
    https://www.hy2green.com/

    Hydrogen is generated from electrical energy by means of electrolysis and fed into storage tanks filled with metal powder. Here, the hydrogen enter into the metal structure and remains as a safe and stable compound – which is known as metal hydride. This compound can be released again by simply adjusting the pressure and temperature. The released hydrogen is fed into a fuel cell and converted back into electricity and heat. The only residues are oxygen and water – natural elements and no environmental pollution!

    The integrated heat management system captures the conversion energy that is lost as heat and makes it available to the application’s heat cycle. This significantly increases the energy efficiency of the entire system.

    The result: An efficient zero emission electrical and thermal power system.

    ...

    The Hy2Green system covers energy storage ranges from 80 kWh to 66MWh and can be tailored to the application need. Its modular system approach offers a perfect integration of short term (day-night) storage types (e.g. electric batteries, hot water accumulators) enabling highest system flexibility.
    SHINIGAMI
    SHINIGAMI --- ---
    YMLADRIS: antrax ti neudela apidemii
    YMLADRIS
    YMLADRIS --- ---
    SHINIGAMI: loni nejake ditko na sibiri umrelo na rozmrzly antrax. na to ockovanej nejses
    Kliknutím sem můžete změnit nastavení reklam