FYI, according to my actual teardown of the heatpump system, it doesn't fully match the patent. I'm going to do an in-depth video soon. Here's my initial exploration video from May: https://youtu.be/PnUnBiNfa-A
One of the more obvious changes is there is an 8-way glycol valve rather than 9; The "Octovalve": [ Octovalve logo: http://ingineerix.com/pic/?octovalve-logo ] On Tue, Dec 21, 2021 at 6:55 AM Mark Hanson via EV <[email protected]> wrote: > > Hi Folks > I asked the great god google since I was curious why I hear things > whirring when parked. There’s some info on Teslamotorsckub.com but a good > analysis of the patent from March 7, 2019/0070924A1 on > www.insideEVs.com/news/452464/Tesla-model-y-heat-pump-system-details/. > It shows that 2019/earlier was resistance heat using 2170W vs 735W for the > mini split heat pump. It also scavenges heat like a geothermal heat pump > below 14F from the motor/inverter/battery liquid cooling circuit. Below > that it goes onto COP=1 mode (like leaving your fridge door open) where it > runs the condenser discharge air back to the evaporator inlet (runs > condenser/evaporator same time) resulting in 5.5KW of effective resistance > heat. When the cabin gets above 50F during the day in the sun sitting in a > parking lot, it sucks the heat out and stores in the battery mass heat > sink. Then reuses that heat when driving home in the cold weather after > the sun goes down. So they play a lot of efficiency games to get the best > range (unlike my Chevy Bolt or Nissan Leaf that’s only resistance heat). > The Hyundai Kona and Kia Nero EVs use a similar mini split heat pump and > scavenge heat from the motor/inverter/battery. > Stay Charged, > Mark > > _______________________________________________ > Address messages to [email protected] > No other addresses in TO and CC fields > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/ > LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20211221/4dec9ad6/attachment.html> _______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
