HNHacker News
TopNewBestAskShowJobs

ralphhughes

87 karma · joined August 17, 2015

meet.hn/city/gb-Llandudno

Socials: - github.com/ralphhughes

---

submissionscomments
ralphhughes··on The Return of Sail Power: Cargo Ships Are Turning Back to the Wind
I've also thought this. There are loads of offshore wind farms in the North Sea and I bet the cost per kWh at the offshore substation is a fraction of the cost compared to the same electricity once stepped up for transmission through the undersea cables to the shore, possibly curtailed due to grid congestion and then transmitted still further to the urban load centers.

If only there was a reliable, mature process to turn air\seawater plus energy at the windfarm into a synthetic fuel (ammonia or methanol maybe?) that could be then stored and used to refuel green shipping that burned no bunker fuel or diesel?

ralphhughes··on Show HN: Stuxnet – A reconstructed source code of the infamous cyber-weapon
Can confirm. I was working in Azerbaijan with people from Iran at the time and had it infect my pendrive and work PC. No anti-virus picked it up at the time.
ralphhughes··on Google boss says AI investment boom has 'elements of irrationality'
It's fascinating and depressing how despite me being in a different country on the other side of the world to you, if I swap the $ for £, your comment is still accurate based on the current situation in the UK.
ralphhughes··on UK's largest battery storage facility at Tilbury substation
I've been inside Dinorwig Pumped Hydro plant back when they were doing tours. They keep the turbines spinning with compressed air to avoid the delay of having to spin up that large metal mass of turbine when they open the water valves.
ralphhughes··on Impacts of adding PV solar system to internal combustion engine vehicles
Good idea! The AC in my Nissan Leaf uses about 3kw so I assume it'd be about the same in my Corsa. However the Corsa disables auto-start stop and keeps the engine idling whenever the AC is on, negating any fuel savings!
ralphhughes··on 'We Currently Have No Container Ships,' Seattle Port Says
more likely a reference to "lights-out" manufacturing where you have automated a factory to the extent you don't have to provide lighting or HVAC as there are no humans needed in the production area. The robots don't need to see.
ralphhughes··on Zelensky leaves White House after angry meeting
I have assumed the same about the gatwick airport shutdown caused by drones in the UK in 2018. Newspapers saying "No culprit ever found" says "results of military exercise are classified" to me...
ralphhughes··on Putin's secret weapon: The threat to the cables on our sea beds
I didn't know Russia had tested being isolated from the wider internet! I wonder what problems they had during testing? I would have thought there would be many issues given our current globally connected world. I don't think I even know which country some of the 3rd party dependencies of my apps are hosted in!
ralphhughes··on Humans have caused 1.5 °C of long-term global warming according to new estimates
I assume all that diesel went straight into a generator for electricity? So in your opinion, could the drill rig have added a trailer full of fold out solar panels and battery storage and still functioned? (I know nothing about drilling for gold, just curious)
ralphhughes··on All the electricity you'll need for 40 years
If you're talking about seasonal storage I would have thought the natural fit would be power-to-gas or power-to-liquid syn-fuels? Absorb all those extra kWh from the sun in summer, store it for 4-8 months and then burn it during the cold, dark winter? Energy storage density higher than gravitational potential energy and less energy leakage than thermal-mass storage due to non-perfect thermal insulators etc?
ralphhughes··on Synthetic diamonds are now purer, more beautiful, and cheaper than mined
I think you may be onto something here. Taking apart old machinery I have often observed that the hardened part of a shaft is worn and has a noticable groove detectable with a fingernail. However the part that rubbed on it is often much, much softer eg a rubber oil seal. My theory is that the much softer material is so soft that microscopic inclusions of something much harder (grit?) are caught in the material and then abrade the harder shaft. Something similar may be occurring in the keys on glass case?
ralphhughes··on Monitoring energy usage with smart plugs, Prometheus and Grafana
The device the OP puts Tasmoto on from athom.tech can also be ordered for the same price pre-flashed with ESPHome to work with Home Assistant. I have used them with 2500W single-socket loads and been happy with them for a year or so. For whole house load I'd recommend integrating with whatever smart meter tech your country uses. For the in-between size loads eg. 32A breakers in a consumer unit I have not found a reliable and cost effective solution yet.
ralphhughes··on Xkcd: Greenhouse Effect
Your comment makes a lot more sense if I swap magazines => reservoirs, is that the word you meant?
ralphhughes··on Antarctic sea-ice at 'mind-blowing' low alarms experts
The other user provided a source that has been used on wikipedia, whereas neither of your comments state any sources. Could you provide some?
ralphhughes··on Titanic tourist submersible goes missing with search under way
Thanks, fixed.
ralphhughes··on Titanic tourist submersible goes missing with search under way
Skimming the website, I assume this submersible is using electromagnetically attached drop-weights so that if anything goes wrong and power is lost, the weights drop off and the submersible floats up to the surface again? And 96 hours of life support sounds good, but unless there is another submersible nearby that can dive down, find them AND attach a line, the number of hours of life support will be irrelevant. Of course if the pressure hull has failed catastrophically it will have been over mercifully quickly. Anyone know if deep-diving submersibles are required to carry black-boxes like aircraft?
ralphhughes··on Regent – Electric coastal travel
I've often thought a smaller, faster form of transport like this would be lovely for summer day trips across to the Isle of Man. There's a currently a car ferry and scheduled flights from Liverpool airport but the faff involved in driving to Liverpool only to queue up for hours just for a 70 mile flight puts me off!
ralphhughes··on OpenEnergyMonitor – open-source monitoring for energy
I've avoided smart-meter data so far as it shows zero watts no matter how much I export (I don't have an export contract, it's a DIY PV install and no point with current pricing) hence why I'm looking at ones with a seperate sensor. It frustrates me no end that my IHD doesn't show export, only import!
ralphhughes··on Electric scooter ban increased congestion by 10% in Atlanta
Native English speaker here that doesn't know any French and that's a great word! The word reminds me of a horse trot which is a bit faster than walking, so feels like a good description. Scooter isn't the only word to have multiple meanings, "bike" can mean motorbike or bicycle which is another one in the endless source of confusion that is English!
ralphhughes··on Potential Issues of Using a USB Powerbank as a UPS (2021)
I do this with the Home Assistant app on my phone. When the battery level gets to 80% it triggers the smart plug the charger is connected to, to switch off. My phone is 3 years old now and according to AccuBattery still has a battery health of 2499mAh out of a design capacity of 2700mAh (Based on 977 charge sessions for 1,215,025 mAh total)
ralphhughes··on President Putin has announced a partial mobilization in Russia
Thanks, someone is doing a useful service translating Russian TV for the rest of us!
ralphhughes··on President Putin has announced a partial mobilization in Russia
>Their main propaganda news channel has already said (incorrectly) that they are already fighting NATO and US troops in the breakaway areas.

Thats interesting, I'm not doubting you but I would like to see the original source if possible, got a link?

ralphhughes··on Day ahead electricity prices for EU
Yes it does, in fact the UK is in the process of building many more HVDC interconnectors (see table in 3rd section of page) https://www.ofgem.gov.uk/energy-policy-and-regulation/policy...
ralphhughes··on France is paying car drivers nearly $4k to switch to an electric bike
Your post adds no value to the discussion, this is NOT reddit.
ralphhughes··on Please make a dumb car
That is a genuinely nice user interface. I can see what virtually everything is from a distance in the picture.

I especially like the larger fuel gauge; I drove a car once that had a handful of little LCD rectangles like a coarse bar graph. I struggled to tell if I had 50% or 75% left!

ralphhughes··on Petra's remarkable thermal bore cuts through undrillable rock
I wish there was a bit more detail on how they're actually doing this. Is it basically a giant blowtorch? Must use a heck of a lot of energy to cut holes in the larger diameter sizes!
ralphhughes··on Ask HN: Why is everything changing too fast?
You say 'this could still be done right now', but in many cases it is being done already. For example the company I work for [0] spent many years databasing where oil reservoirs were globally. Now we sell the same information for sequestering CO2 in the empty reservoirs :-)

[0] https://www.cgg.com/industry-applications/energy-transition/...

ralphhughes··on Raspberry Pi Build HAT – Controls Lego Technic motors and sensors
The motors that connect to the Build HAT are servo motors with integral absolute encoders. Encoder resolution is one degree. Power is 7V DC ish.
ralphhughes··on Just Be Rich
This is actually being tried, starting this month, in my area (https://www.bbc.co.uk/news/uk-wales-56293250)

Monthly council tax will double for properties that do not have occupants. This is due to my area having over 10% of houses being bought as holiday homes or investments that stay empty for most of the year.

ralphhughes··on Working Off-Grid Efficiently
When you're docked in a marina or similar its unlikely there would be space. When you're sailing or motoring somewhere you want the minimum drag\resistance through the water, and more importantly, the waves would smash them to pieces in no time. To make them weatherproof would mean making them less like a floating solar panel and more like a small boat.
Page 1 of 2Next →