It’s basically because they don’t directly convert electricity into heat, they just pull it in from outside. It still takes energy to ‘push the heat uphill’ from a cold place to a hot place, but less than directly heating.
To take my previous comment to the next level, have you ever put your finger over the end of an old-school bicycle pump and tried to push it in? If you have, you’ll know that the pump gets hot. The reason is that you are not only compressing air, you are compressing the heat that the air has. This raises the temperature and we can use this phenomenon to move heat around.
Imagine you were outside where it was cool and you extended the bicycle pump and blocked the end permanently.
Then you went inside hour house and compressed the pump. The air (and heat) in the pump would be compressed into a smaller space, so it the air temperature of the air in the pump would increase. If you compressed it a bit, the air in the pump might go up to be the same temperature as the air inside your house. If you compressed it even more, it would get hotter than the air inside the house. If you then held it there, over time, the heat inside the pump would transfer through the wall of the pump to the air in your house. This would cause the air inside your house to warm up and the air inside the pump to cool down until they are the same temperature. In doing this you have taken the heat in the air outside, and released it inside.
If you then went back outside and allowed the pump to extend again, then the air would decompress and, because the heat previously left the air in the pump (when it was inside), it would get quite cold. Colder than the air outside. If you then waited again, the air in the pump would gradually warm up, drawing heat from the air from outside of your house. This happens because even though the air outside is cool, it’s still warmer than the air in the pump.
Rinse and repeat. An air conditioner on heating mode, or a heat pump basically work in the same way. However, rather than using a bicycle pump, they have fluid running in a loop from inside to outside and back inside. The evaporator (outside the house) collects heat by allowing the fluid to ‘expand’ and cool below the ambient temperature outside. The condensor (inside the house) releases the heat by allowing the fluid to ‘contract’ and heat above the ambient temperature inside.
In this way, no heat is directly created from electricity. It is just moved from outside to inside. Believe it or not, this takes less energy than converting electricity into heat directly.
I’ve deliberately not talked about phase change here to keep it simple, that doesn’t change the basic idea behind it.
Thanks for the suggestion! I checked that webisite but to sign up it requires a donation and i’d rather use something else. I’m not looking for anything specific really, I just like to scroll down the list and see what interests me. I like math/physics/electronics/computers etc. Pretty much everything related to computer engineering (I need it for college)
miracle drug melts peoples brains and destroys endocrinal and electrical balance of the brain because some people just couldn’t take the extra length that is proper communication with autistic people
All subdomains on apache proxies… its a bit of a mess though. Whenever it comes to update something I can never remember how I installed it. Theres a heady mix of script installs, deb installs, source installs. I’ve got Gitea ready to update but I have no idea what method I used to install it :')
I just read the post about backups. Since we don’t need 100% uptime. It is so easy to shut down the services, tar.gz the data folder, then store the in b2, restart everything and your server is looking schmick again!
321 strategy: 3 copies of everything important, 2 on-site, 1 in cloud. I have a TrueNAS Scale NAS running RAID5 on ZFS. All the laptops, desktops, etc. backup to the NAS. (Mostly Macs, so we use time machine over the network). So the original laptop/desktop is 1 copy. The NAS is a second copy on-site, and then TrueNAS has lots of cloud options. I use Amazon S3 myself, but there are lots of choices.
Prior to this I had a Synology NAS. It was "small" (6TB), so it has a RAID mirror of 6TB drives and a single 6TB external USB that had a backup of the mirrored pair (second copy on-site). Then I also used Synology's software to backup to S3.
For my Internet-facing VMs, they all run in xcp-ng and I use Xen Orchestra to manage them. I run regular snapshots nightly, and then use NFS to copy them to a cloud server. That's sloppy, and sometimes doesn't work. So the in-the-house stuff is backed up well. The VMs are mostly relying on Xen snapshots and RAID 5.
Depends on Load. Realistically, one of the used “Mini PC’s” from Lenovo or HP with an i5 and integrated graphics should be decent for a couple of concurrent streams. They are pretty cheap on ebay. You could even get 3 or 4 and cluster them in some form. But most SBCs won’t work too well since transcoding needs a decent GPU of some sort.
Realistically, one of the used “Mini PC’s” from Lenovo or HP with an i5 and integrated graphics
Second this. I downsized from a couple of heavyweight enterprise servers to a handful of USFF Dell Optiplexes for the bulk of my self-hosted applications. I also have a stack of upgraded thin clients that run my smaller apps wonderfully.
The power, heat, and noise reduction has been amazing.
It sucks, plain and simple. Single-player games should never require internet access, and if the game has a multiplayer component, it should be a separate mode that leaves the single-player mode working even when there is no internet connectivity.
It’s just basic fucking common sense… except that it conflicts with financial interests and greed.
I loved enterprise, I didn’t think I’d be able to stop thinking ‘that’s the bloke from quantum leap’ but he’s captain Archer to me now.
Trip was great, I loved phlox, t’pol, porthos and Malcolm.
My favourite episode was the one where archer got his brain mashed by some anomaly and t’pol spent 12 years explaining the same thing to him every morning.
I could understand people being disappointed that TNG was over and feeling that the replacement wasn’t as great, but in itself watching it 10 years later I enjoyed it for the most part.
I used to read a lot more, and I do remember this happening, but it happens a lot for me now with podcasts. I’m a big podcast junkie and I will often find myself going down a rabbit hole of thought and realizing I have no idea what they’re talking about anymore.
So glad it’s not only me zoning out on podcasts. I haven’t been able to read a book in years. I’m hoping i can get back into reading again now that I nuked my reddit account
I’ve been using navidrome since the start of the year. It was my first instance of self hosting my music and my main focus was to have a dedicated project for it and to not use something like Plex, Jellyfin, etc. I’ve been liking it so far, it’s simple and just hosts and streams music. Doesn’t have any client side apps or any tagging or smart algorithmic playlists, which is fine by me. Plenty of iOS and Android client side apps with varying features that can download. Worth checking out!
I use Navidrome as the backend and DSub to connect to it. When I’m on the go I use a site-to-site wireguard VPN connection back to my server to listen to music and it also caches the songs so even if I don’t have reception I can still listen to my music.
Right now I’m using Plexamp. Really nice app, offline features work really well. Sonic Analysis is awesome. Only issue I have is it crashed sometimes when I’m using Google maps.
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