cmutel

7 ms·

1.
by cmutel 3y ago
I'm an American living in Switzerland for over 10 years, and this was definitely my impression as well. But that isn't really the case anymore here - you can no longer have anonymous (i.e. only numbered) accounts, and Switzerland
2.
by cmutel 4y ago
The Nordic countries are famous for pioneering low temperature district heating. This can be as low as 50 C. Sorry, no citation, this is what I heard at a project meeting on district heating networks in Switzerland. District heating with su
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by cmutel 4y ago
https://github.com/USEPA/
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by cmutel 4y ago
Aargau, normally considered higher tax, but we have four kids at home.
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by cmutel 4y ago
Since we're having the semi-annual "how do taxes work in other countries" thread, here is my experience as an American living in Switzerland. Though I have been here a while, I still find it interesting and a little weird. At
6.
by cmutel 5y ago
The official ISO shortname changed on Sept 28, 2016: https://www.iso.org/obp/ui/#iso:code:3166:CZ . Wikipedia has a good discussion: https://en.wikipedia.org/wiki/Name_of_the_Czech_Republic
7.
by cmutel 6y ago
Sorry for being late to the game, but we have an as-open-as-it-can-be tool to compare petrol, gas, battery, and fuel cell cars, both today and in the future, available here: http://carculator.psi.ch/ The Python library whic
8.
by cmutel 6y ago
Here is a series of three open access reviews covering the current literature (1000s of papers): 1: https://iopscience.iop.org/article/10.1088/1748-9326/aabf9b 2: https://iopscience.iop.org/ar
9.
by cmutel 7y ago
Yes, but the linked product/subscription also include deep injection, not just the capture.
10.
by cmutel 7y ago
You are right that this is very expensive. Other firms in this space estimate that there should be a lower bound for direct air capture of $100-200 per ton of CO2 [0]. However, this is a very different product than BECCS - it direct air cap
11.
by cmutel 7y ago
Climeworks is a Swiss startup in business since 2003; they have built multiple pilot plants in Switzerland, and are well known here. See e.g. https://www.climeworks.com/about/
12.
by cmutel 7y ago
This is a reasonable place to start reading, they provide both summaries and detailed explanations of the science: https://www.ipcc.ch/report/ar5/syr/
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by cmutel 7y ago
Lithium prices have gone down almost 60% in the last year. Short-term storage isn't that bad, we have other battery chemistries or even completely different types (e.g. flow batteries). A bigger problem is seasonal storage, for which m
14.
by cmutel 7y ago
The process of making clinker uses heat to separate CaCO3 into CaO and CO2 [0]. This release of CO2 is normally about half the CO2 footprint of making concrete (the rest is mostly combustion of coal to generate heat). CO2 can penetrate into
15.
by cmutel 7y ago
We looked into this with a completely open toolchain [0]. You could email either of the two first authors to get the code (not sure why it wasn't in the paper supporting information). Building open carbon models isn't difficult, i
16.
by cmutel 7y ago
As far as I understand, current state-of-the-art is between $100-200 per ton CO2 (see https://www.cell.com/joule/fulltext/S2542-4351(18)30225-3 ). This is from the CO2 capture company Bill Gates has invested in, FW
17.
by cmutel 7y ago
Here is a whole (open access) journal issue on negative emission technologies: https://iopscience.iop.org/journal/1748-9326/page/Negative%2... Short summary: There is no free lunch. Almost everything is expen
18.
by cmutel 7y ago
In our research, we see that the easy alternatives are being used almost to capacity already, making future improvement difficult. For example, there is basically no unused fly ash in Europe, and it is sometimes imported from as far away as
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by cmutel 7y ago
There is a way :) Don't forget that each atom of carbon combines with two oxygens from the air.
20.
by cmutel 7y ago
It is not unclear how their method, they explain it quite clearly and in detail [0]. In general, you are correct that road and (especially) rail require substantially more infrastructure than air travel. For combustion vehicles, however, su
21.
by cmutel 7y ago
The cited study is not peer reviewed, nor does it provide any supplementary data. Simply put, as it is not reproducible, it is not science. The best studies will be completely open about their assumptions, data sources, approximations, and
22.
by cmutel 8y ago
I am part of a team building an RDF database to be used for environmental footprinting and industrial ecology ( https://github.com/BONSAMURAIS ), and am also slowly becoming part of the Swiss open data scene - I would appreci
23.
by cmutel 8y ago
The following open access publications give a broad overview of NETs: Part 1: Research landscape and synthesis: https://iopscience.iop.org/article/10.1088/1748-9326/aabf9b Part 2: Costs, potentials and side e
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by cmutel 8y ago
I think you are right that Drawdown is doing good work, and trying to compare things that are quite difficult to compare. At the same point, the HN community should be aware that the data and models are neither open nor clearly identified,
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by cmutel 8y ago
The method to calculate there fact sheets (or environmental footprints) is called life cycle assessment, and has been trying to come up with labels for a long time. There have been large projects by Walmart and Tesco, for example, to label
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by cmutel 8y ago
Indeed. Here is a reasonable introduction by people who have a deep background in environmental footprinting: https://lca-net.com/blog/what-will-distributed-ledger-techno...
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by cmutel 9y ago
We just published a study on the environmental performance of current and future battery and fuel cell motorcycles ( https://www.sciencedirect.com/science/article/pii/S030626191... ; also available via scihub)
28.
by cmutel 13y ago
Perhaps, though the first Apple store in the Zurich area was in a mall which few would call glamorous: https://www.apple.com/chde/retail/glattzentrum/