[-] humanspiral@lemmy.ca 3 points 1 week ago

is this $6.8B operating costs? Can you link to post about costs?

[-] humanspiral@lemmy.ca 4 points 1 week ago

Including Obama who surrounded himself (top cabinet posts) with the most zionist neocon republicans in the democratic party, Biden and HRC, unprimaried Harris continues the tradition of Republican sympathizer nominee, as some desperate attempt to avoid a stronger fascism that DNC/media keeps humanizing. Media and Zionist first political donations is an insurmountable problem, though.

[-] humanspiral@lemmy.ca 4 points 1 week ago

I see you weaving... 1600% tariffs on 6 minute abs videos is sure to make us all rich.

[-] humanspiral@lemmy.ca 6 points 1 week ago

I hear slavery improves productivity a whole bunch! It's never clear the period "again" makes reference to in MAGA

[-] humanspiral@lemmy.ca 3 points 1 week ago

Plastic/FRC pipes solve the leakage problem. They are also salt water resistant. Soft steel NG distribution pipes have low leak rates as well. Converting hard steel NG transmission pipes is possible by lining them in plastic. In any near future, H2 only new pipes would be built. H2 is more valuable when it is pure because it has higher efficiency electric conversion than NG, as well as being an ingredient to several important chemicals.

[-] humanspiral@lemmy.ca 4 points 1 week ago

Green H2 does not benefit oil industry at all. It is only basis for a H2 economy because such an economy has to be 100% clean (FF derived H2 has less net energy content than original FF), and the essential rationale for an H2 economy is one where enough renewables to provide 100% of electricity every day needs to overproduce on most days, and H2 electrolysis is an automated way of providing transportable/exportable fuel that converts to electricity at high enough efficiency. The transportation cost advantage of H2 over electric transmission is enough to overcome the efficiency loss of creating it when the electric energy is cheap enough. 2-4c/kwh is enough for cheaper energy delivery by H2.

While Toyota has made great research/development in fuel cells, I agree that they have had a “don't buy an EV until you see our next model of the Mirai”, and oil companies bs about “blue H2” potential as path to fish for more subsidies, the anti-H2 fan boys are actually EV/battery investors. H2 economy requires batteries, and does have vehicle applications, but the main reason for it is that it is only path to 100% renewable energy.

The good match for wind, and offshore wind especially, is that many places achieve full electric demand coverage from solar alone on some days. On those days, adding batteries with more solar could achieve solar coverage over 24 hours. If it is windy at the same time, no wind energy would get sold those days, and then no additional renewables would be economic in that region, and higher demand days would not get covered by renewables. H2 is path for, wind especially, to sell/monetize all of their energy produced, but also bypass, for all renewables, grid transmission bottlenecks that monopolies don't mind being bottlenecks if it increases their discretionary power in providing energy permission.

[-] humanspiral@lemmy.ca 2 points 1 week ago

AFAIU, these are ROI/profit oriented investments. This is a better path than US subsidy approach, or its encouragement of stock buybacks.

[-] humanspiral@lemmy.ca 3 points 1 week ago

one of the largest offset projects in Kariba, Zimbabwe, suggested that the amount reaching communities was 6%, at most.

and by "communities", they mean the "forest owner". Perhaps that is more capital to buy harvesting machinery. But in general this is an extra monetization/financialization scheme that doesn't affect actual carbon reduction. This is not money that goes towards transitioning energy systems and reducing emissions.

A carbon tax and dividend scheme can properly compensate maintained forests that don't burn. Instead of financializing corporate PR schemes.

[-] humanspiral@lemmy.ca 2 points 1 week ago

the cheapest battery chemistry, used in most affordable EVs, uses no nickel or cobalt. "Race"/premium EVs still want to use that type of battery, though

[-] humanspiral@lemmy.ca 3 points 1 week ago* (last edited 1 week ago)

China's ultra cheap EVs are subcompacts that are extremely well suited to small batteries to keep them cheap, while having good range/mileage. Small batteries can work for EVs if there is good charging infrastructure. Europe, being densely populated, is suited to having good charging infrastructure on heavily used highways, and "drive through small towns" which have cafes and restaurants suited to recharging at EU life pace.

EU/French car history is ultra well suited to small cars, where cities have narrow streets, and affordability has always been popular.

EVs with small batteries, even in EU/US, can be built cheaper than ICE vehicles by domestic brands. Battery costs are falling everywhere, but licensing/importing Chinese tech to bringing battery costs down, is path to domestic EV industry success/growth. EU is especially vulnerable to geopolitical oil extortion, from both friends and foes.

[-] humanspiral@lemmy.ca 3 points 1 week ago

this would call for the use of phase changing material to absorb the heat from the back of the solar panels

There are quite a few "better" technologies for cooling solar panels, which happens to also improve their efficiency/production.

Thermoelectric devices would boost production a little, and keep production a bit past end of day. This might not yet be cost effective, but massive production scale could change that. Circulating water behind the panels, transfers the most heat, and hot water is useful to everyone. A simpler, leak proof, technology is to suck in air behind/under the panels that creates a flow that will cool them, and use that hotter air to feed a heat pump.

[-] humanspiral@lemmy.ca 4 points 1 week ago

I'm not sure of the validity of model, though I appreciate the effect of cooling at night.

Without solar, ground, usually fairly dark, absorbs solar heat at 100%. Solar panels cover 75%-80% of this heat to electricity, and while they get hotter than lighter shaded ground, the heat capacity of dirt is much higher, and the heat is lost quicker from air/wind contact. Similarly a building that has a solar cover with a slight airgap, will be cooler during the day than without solar, and using less AC, produce less warming surrounding the building.

For cold areas, snow cover actually retains warmth in soil. With bifacial panels, increases winter production significantly. No airgap over buildings, is path to keeping more heat for building, but using an airgap to help preheat air or water pipes for heat pump is just another path of using environmental heat to focus on useful heat. Heat pumps for heating (vs cooling) in general reduce outside temperatures.

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humanspiral

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