chimere

5 ms·

1.
by chimere 3y ago
Yard Stick PBC | Mechanical Engineer | On-site (Oakland, CA) | Full-time | https://useyardstick.com We are a climate tech startup developing a dramatically cheaper sensor for measuring soil carbon. Soils have gigaton-scale seque
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by chimere 5y ago
Yard Stick PBC | Climate Tech Hardware | https://www.useyardstick.com/ At Yard Stick, we’re inventing a new method of soil carbon measurement. Affordable soil carbon measurement will unlock soils as the most scalable and af
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by chimere 5y ago
Primarily it's ranchers and farmers globally who want to get paid to add carbon to their soils by adopting more soil-friendly practices. This is a rapidly growing market as more companies are looking to offset their emissions. There&#x
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by chimere 5y ago
Yard Stick PBC | Lead Hardware Engineer, Senior Electrical Engineer | ONSITE / HYBRID (Oakland) At Yard Stick, we value climate impact above all else. We help farmers get paid to fight climate change. Removing CO2 from the atmosphere w
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by chimere 5y ago
If you're interested in healthy soils, and particularly their enormous potential for carbon sequestration, consider joining my team at Yard Stick! We're building hardware that measures soil carbon in-situ, 90% cheaper than convent
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SF coder makes a retro RPG in quest to find cofounder(twitter.com)
3 points by chimere 5y ago|0 comments
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by chimere 8y ago
Interesting question - I'm not sure I know the answer but happy to speculate. Electrolysis certainly is a much tidier process than gasification, but everyone seems to assume it's powered by 100% renewable energy. What incentives
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by chimere 8y ago
(Charm Co-founder here) Ultimately our goal is large-scale CO2 removal and sequestration with biomass. This process produces an excess of energy which we can sell in various forms to fund the process. We chose to start with Hydrogen simply
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by chimere 8y ago
10-20 tons per day is commercial scale. The prototype in this article was much smaller - running around 0.3 t/day.
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by chimere 8y ago
(Co-founder at Charm) Fair points. I'm not going to defend corn ethanol - our process yields 10x more saleable energy per acre than corn ethanol. The energy crop we're currently field trialing is similar to sugarcane, with extreme
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by chimere 8y ago
Certainly we considered it. The problem is that on this prototype system we were operating with a sealed hopper. Thus any gas injected into the hopper would travel through the system and dilute our output gas stream. Also any oxygen in the
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by chimere 8y ago
Also the USGS has this super cool map of potential CO2 storage in (under) the US: https://co2public.er.usgs.gov/viewer/
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by chimere 8y ago
(Charm Co-founder here) Certainly - you're effectively describing biochar ( https://en.wikipedia.org/wiki/Biochar ) which historically has been used as both an energy source and a soil amendment. Using it as a seque
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by chimere 8y ago
(Charm co-founder here) I love that video! That fluidization phenomenon is commonly used in large-scale gasification or combustion processes, see: https://en.wikipedia.org/wiki/Fluidized_bed_reactor
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by chimere 8y ago
Charm Industrial [1] was recently mentioned on HN, with a novel approach to BECCS using grass to produce carbon-negative hydrogen. Grasses are the highest-yielding biomass per acre and thus the cheapest CO2 removal option. It also helps if
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by chimere 8y ago
Perhaps you're thinking of Snake, built by Mark Setrakian? One of the most iconic battlebots ever. I could only find one video of him using the skeuomorphic controller [1], and a picture of him holding it [2] [1] https://www
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by chimere 9y ago
This is called film cooling, and SpaceX actually does use it on their second stage engine, the Merlin vacuum variant (MVac). You can see the beautiful exhaust plenum wrapping around the nozzle [1]. This isn't used for the regenerativel
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by chimere 9y ago
That's right. The most common polar orbits, sun synchronous orbits (SSO), are actually inclined at ~97 deg from the equator. This means that they're moving slightly opposite of the earth's rotation, requiring it to be more th
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by chimere 9y ago
How does one get involved in a climate R&D group? Any more info you can share?
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by chimere 10y ago
You're correct. In addition, it's important to note that conjunction (collision) risk is proportional to spacecraft cross-sectional area. Thus, even with 100 of these small 10cm x 30cm spacecraft, they still pose less debris risk
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by chimere 10y ago
This launch was to 500km, and the Doves are around 150kg/m^2 (4.5kg / 0.03m^2). This puts their lifetime at around 5 years according to that linked plot. For reference, Planet's earlier launches were to the ISS (400km) and la
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Space startup Planet acquires incumbent Blackbridge and Rapideye satellites(planet.com)
3 points by chimere 11y ago|0 comments
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by chimere 14y ago
This actually uses control moment gyroscopes [1] in a scissored-pair configuration, the subject of my undergrad thesis. These differ from standard gyroscopes in that they are gimballed to produce a reaction torque. They are actually most co
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by chimere 14y ago
When I've heard Elon talk about this before, his idea is that people interested in moving to Mars would actually sell their house and Earthly possessions in order to pay for the ride. They won't be needing all that junk anymore anyway. Once