So effectively light enough that it could run on a raspberry PI 4. Well that would put you under 10W
heating is not done year around (365.25 days/year) for the majority of the world's population.
Hence why places which need heating year around are generally considered an edge case.
There are a great many "promising" technologies in the pipeline, the real question is which of them actually suit our needs and only via real world trials will we discover the flaws and see if the benefits outweigh the flaws.
well no storage can be 100% efficient but you are correct that thermal storage is very efficient if you want a thermal gradient to leverage for heating (cooling as well)
I am assuming you mean Pumped-storage hydroelectricity when you say PHES and no it also falls under F=ma, but when using the terrain is able to increase the amount of mass to a more industrial useful scale. The larger the scale the smaller the losses. Hence most economical when one has mountains for the storage of the water. (metal/plastic tanks on elevated platforms tend to be much less efficient and more expensive).
I guess it depends on what you mean by rare long duration events but yes one can imagine a situation where the burning of hydrogen is justified on an energy needs basis.
harmonization of grid standards is more than just frequency (it is mostly policy paperwork and the replacement of non-compliant equipment or the installation of conversion equipment) but you are correct high voltage DC is used for long distance power transmission. There are also details such as who is responsible for paying for what, where things are to be connected and various other bureaucratic details.
well as you can buy solar panels at $0.50/W so a 10W panel can be obtained for $5 and a raspberry pi4 only uses 2.7W while idle and 6.4W when under full load.
Sounds like they didn't consider appealing to UK government to get subsidized liquid CO2 and use the produced hydrogen to synthetically create hydrocarbons (which are much easier/cheaper to store) and win political points doing so.
The breeder part is the production of U-233 (which is then fissioned and used to provide the neutrons for converting Th-232 into U-233 (with a chemical separation and decay storage step in between)) which although has a tight neutron economy is viable.
Working reactors for such designs were funded by the US airforce and they did operate as expected.
If you wish to argue that one will need U-235 as a startup fuel or that there are technical problems in large scale energy production it is not yet able to address, I would definitely agree on that; the technology needs more research before we depend upon it and that Uranium light water reactors are likely to be the running standard until such time and needed investment occurs. But we have enough U-235 in nuclear waste stockpiles to fuel our civilization for a thousand years to work out the details.
completely fair perspective, if you are required to travel large distances outside of cities then liquid fuels would be the superior option.
But if cities are linked by high speed rail and effective bus coverage; there would be no need for a car to visit someone. #fuckcars
I do agree that batteries are not a good solution for planes but I believe plane use should be only for special cases that are extremely time sensitive (like organ transplant transportation) and are of high social benefit (which could justify carbon fuel usage)
One doesn't need batteries or combustion in heavy transport as fixed lines can just use electric wires which saves on moving weight and would make such transport more efficient that any carried fuel source.
I guess a discussion on shared meaning of what it means to die would be needed to understand if not dying as possible future/current/previous state in the universe and directly address your request to change your mind.
They may wish to look into Gnu Guix (and possibly nonguix channels depending on their needs)
the correct answer is Gemini or gopher.