RADIQAL: jo, taky mi prijde, ze ukolem XR je eskalace konfliktu a paniky:) do jisty miry je to asi kvuli klimatu opravneny, ale cilem by melo bejt stale docilit konstruktivni diskuzi, protoze panika a zakopy nas k reseni neposunou

nicmene klid je vsude, kde si ho udelas. pokud se nedari, doporucuju treba Eduarda Tomase

https://www.nature.com/articles/d41586-020-03621-6

This shows the Biden team is really going to follow through on the bold climate commitments they put forward,” says Leah Stokes, a climate-policy researcher at the University of California, Santa Barbara. It’s a massive political shift, she says, “and it puts the country on track to make climate change the center of our economic policy.”

Regan spent more than nine years working in the EPA’s air quality programme under former presidents Bill Clinton and George W. Bush, and another eight years working at the Environmental Defense Fund, an environmental advocacy group based in New York. For the past four, he has led North Carolina’s Department of Environmental Quality, where he earned the support of many environmentalists by standing up to chemical and energy companies.

aby to nebylo tak jednoduchy

Land ecosystems are becoming less efficient at absorbing CO2 -- ScienceDaily
https://www.sciencedaily.com/releases/2020/12/201218131902.htm

TADEAS: V Hostětíně budu mít asi dobrou představu…

TADEAS: nevim jestli na desetinu, ale na petinu uz projekce na celkovy naklady jsou :)

A combination of cost reductions in electricity and electrolyzers, combined with increased efficiency and operating lifetime, can deliver 80% reduction in green hydrogen cost. 

IRENA sees renewable hydrogen at least cost-possible within decade - Green Car Congress
https://www.greencarcongress.com/2020/12/20201218-irena.html

SHEFIK:
The proposed system could only work by employing a battery with a minimum storage capacity of 20 kWh and a fuel cell and electrolyzer with an installed capacity of at least 4 to 7 kW. “Hydrogen storage capacity of about 170 kg to 190 kg is needed to maintain system operation during the winter months, thus, unless additional compressors are used, a relatively large area in a residential home would be required for physical storage of hydrogen,” the scientists affirmed.

idealne do sklepa kazdyho baraku, hasici approves :)

SHEFIK: uh oh
z PDF: "When compressed to 50 bar (...) the storage capacity for the 183 kg of hydrogen would need to be 45.8 m3"

TADEAS: neco takovyho?

Whirlpool Turbines Can Provide 24/7 Renewable Energy For Dozens Of Homes
http://www.youtube.com/watch?v=buF8ASmwXt4

SHEFIK: vtipny je ze i na urovni domu/domacnosti ta energeticka problematika kopiruje tu sirsi. v zasade z tohohle pohledu je problem akorat ta zima, v malym meritku je k dispozici plyn, bioplyn, vodik, drevo... a uspory, tepelny cerpadla a vhodna kombinace technologii. vitr je v podstate relevantni akorat grid-scale. jeste by davalo smysl nejaky micro-hydro, ale to jsou hodne specificky podminky.

pro PADa a TADEASe

Batteries and hydrogen to make residential off-grid PV technically feasible – pv magazine International
https://www.pv-magazine.com/...es-and-hydrogen-to-make-residential-off-grid-pv-technically-feasible/

Researchers in Finland have demonstrated the technical feasibility of an off-grid residential PV system combined with short-term battery storage and seasonal hydrogen storage. The proposed model is applicable only to northern climates, as higher levels of solar radiation in southern locations would mean a reduced need for seasonal storage. It was tested in an existing single-family house in Finland with a 21 kW rooftop array and a ground source 6 kW heat pump.

...

In their simulation, the academics used a battery bank for short-term energy storage and for controlling peak demand, and a hydrogen tank linked to a water electrolyzer and fuel cell for seasonal storage. Surplus PV electricity is used primarily for charging the battery and only when the latter is charged is it used to power the electrolyzer. Overdemand, on the other hand, is always met first by the battery itself. “Unnecessary sudden powering on and off of the fuel cell is minimized by limiting its output power based on the battery state of charge,” they also specified.