Viewing profile — energ8

"significant increase in the range of 10.7-42.2% for lightweight and aerodynamic efficient vehicles" shout out to aptera motors https://aptera.us/vehicle/ that's currently vapor wa…

It's a thing in from thousands of years ago https://en.m.wikipedia.org/wiki/Yakhch%C4%81l and today https://en.m.wikipedia.org/wiki/Passive_daytime_radiative_co... for PDRC there a…

I have seen repeated claims of heat pump CoPs improving over decades. Can anyone summarize or provide links to what improvements are being made? Compressor technology? refrigerants…

There might be an additional benefit for fossil fuel trains. Point source capture is usually more efficient than direct air capture. This isn't necessarily directly point source, b…

It'd be somewhat custom, but there is a commercial heat exchanger ( https://www.hotspotenergy.com/pool-heater/ ) that an HVAC tech should be able to install

You might be interested in this paywalled paper (or similar ones): https://pubs.acs.org/doi/10.1021/acs.iecr.0c02255

> by applying heat More heat than is common for home appliances I know! A commonly referenced stat is 825 C. There's really a gradient: https://en.m.wikipedia.org/wiki/Calcium_carb…

From my armchair-research, there are scale challenges with plants. Algae is commonly the go-to for CO2 scrubbing for it's relative efficiencies. Algae might scrub 1-3 grams of CO2 …

I think there are large room diy heat pumps. "diy mini split heat" found me this [0] for example. Also, depending on your hackerness, you could adapt window air conditioners. From …

Residential Flywheel Energy Storage by Velkess: http://velkess.com/letter.html Maybe sad more than surprised

Scarves are also a mainstream style choice for keeping necks warm, inside and out. Dropping the style, Neck Gaiters, Buffs, and Balaclavas are my go-tos for real cold.

The kickstarter project has transformed into Sefton Motors, which says it has engines backordered (but in production): https://seftonmotors.com/collections/all

The fans like this I've seen are powered by TEGs, just like the article is talking about. So, yes, but there is a trade-off. For those familiar with ICE engines, I'd compare it to …

From my reading of heat pumps, mismatches in energy sources and sinks can make linking things together more complicated (aka more expensive) than is commonly available. For the poo…

Yeah, FT looked insane, which is one of the reasons the linked paper was so attractive. Ethanol from CO2, electricity, and water at ambient temperature and pressure. I mostly think…

A previous comment on HN went something along the lines of "what is going to happen in the summer when we've built solar/wind/etc to fulfill this winter months needs?" I started re…