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By hellowalkman · Posted
Scientists explain how bigger does not mean better for electric vehicles during colds by Sayan Sen Image by Blomst via Pixabay A new study by Cornell University researchers, working with Tompkins Consolidated Area Transit (TCAT), has found that electric buses use a lot more energy in cold weather, especially in places like Ithaca, where the roads are hilly and winters can be harsh. TCAT started testing seven battery-electric buses (BEBs) in 2021 as part of a pilot program funded by a federal grant. Over two years, the buses ran on 41 different routes in Tompkins County.However,t the buses had issues during colder months, with lower driving range and performance. To understand why, researchers looked at real-world data and developed what they called “Optimal Temperature Zone” (OTZ) models—these models show how much energy the buses would have used in ideal temperatures between 16°C and 30°C. When temperatures dropped to between −4°C and 0°C, the buses used about 48.0% more energy, including both power used to drive and energy regenerated through braking, compared to OTZ predictions. Even in the wider range of −12°C to 10°C, energy use still jumped by 28.6%. Half of this extra energy went into heating the batteries themselves. These bus batteries work best at about 24°C, so when it’s cold, they need extra power to warm up before the bus can even get moving. The other major factor was the cabin’s heating system, especially on urban routes where doors open and close often, letting in cold air. “With an all-electric vehicle, the battery is the only onboard energy source,” said Max Zhang, senior author of the study and a professor at Cornell. “Everything has to come from it.” The study also found that regenerative braking—the process that lets the battery recharge a bit while the bus slows down—didn’t work as well in cold conditions. One reason is that these bus batteries are huge, about eight times bigger than typical electric car batteries, and it’s harder to keep the temperature even across all the battery cells. To improve the buses' performance in winter, the researchers suggested a few short-term fixes: parking them indoors to keep them warmer, charging batteries while they’re still warm, and reducing the length of time the doors stay open during stops. On a bigger scale, cities might need to rethink their transit infrastructure. That includes checking how many charging stations they have, whether buses can be kept in heated garages, and how to adjust routes and schedules. “You have to try to optimize the schedule of all of the buses and to consider the capability of your infrastructure – how many charging stations you have, and if you have your own garage,” said lead author and PhD student Jintao Gu. The team found that rural routes, which have fewer stops, use less extra energy in cold weather than urban ones. That could help transit agencies decide which routes are better for electric buses during colder months. “One of the lessons we’ve learned is that these buses should be designed for the whole country, including states with colder climates,” said Zhang. “But any lessons are good lessons. This helps us learn as a society and do better.” Source: Cornell University, ScienceDirect This article was generated with some help from AI and reviewed by an editor. Under Section 107 of the Copyright Act of 1976, this material is used for the purpose of news reporting. Fair use is a use permitted by copyright statute that might otherwise be infringing -
By Steven P. · Posted
Appears to be 150W PSU (Core Ultra 9) so most power delivery ports wouldn't even support it. -
By wrack · Posted
Why not use USB-C to power it? -
By +sphbecker · Posted
I wasn't implying people should be forced to use a single launcher. I prefer user choice. If Windows includes a decent game launcher, great, people might choose to use it if they want to. If it sucks, no one will use it. I would be completely against anyone being forced in that direction, just like I am against being forced to use 3rd party launchers if I choose to use Steam. -
By sagum · Posted
Sounds good, but that'd require Microsoft to develop and API of some sort and then get all the developers to support it... but everyone knows that while others will support Microsoft, Microsoft won't support itself and will kill off the feature... again. Microsoft has tried this trick in Windows 9x era, they tried it with the games library in Vista, they tried a big push for Games for Windows Live, and then again in Windows 8 with the WPA apps via their mobile/windows phone eco system. Now they're trying it again, and it's lets not forget that this isn't a push to make PC gaming better. It's not. To do that they need to provide at least the same level of quality and feature set of Steam, otherwise why else are gamers going to not use Steam. Right now Xbox app and everything Microsoft centric around the PC gaming front is exclusively for their new Xbox brand push to make everything an Xbox. Your Toaster, your cat, your PC, your VR headset, everything is a Xbox and that'll last for this generation of Xbox now probably. Then, like Microsoft always has done and will do, they'll drop it like a hot potato and everyone will be left crying. Point in case, bringing Xbox games to the ROG handheld, their entire point of this... They're marketing it as if it's an Xbox console in a handheld, yet, it's not. There are going to be Xbox gamers who think, they'll be able to pickup their Xbox one games and play them on a handheld like Nintendo and Steam Deck users... except they're going to quickly find out that their Xbox game library is almost entirely missing or games they've already purchased on the Xbox need to be purchased again on the 'this is an Xbox' handheld.
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