Had anyone tried a leaf heat pump? On June 10, 2015 5:29:35 PM CDT, Joe via EV <ev@lists.evdl.org> wrote: >I'm on my 4th iteration of air-conditioning scheme. The latest is >building >a controller to run a 2nd gen prius a/c compressor. I have a thread >going >on DIYecar here: >http://www.diyelectriccar.com/forums/showthread.php/diy-controller-04-09-prius-c-140346.html > >It's worked well so far at up to 105F outside despite speed limitations >(due to only a 144v pack) and power draw was only about 1.5kW. I just >got >it working a few months ago so we'll see if it lasts the summer. > >Just some initial thoughts, I spent a lot of time/money flushing the >hoses >and heat exchangers to get all the PAG oil out (eats at the motor >windings >apparently). Also spent extra money on having new hoses made. Since >you'll be starting from scratch, you won't have to do either if you go >the >prius compressor route. Also, if you'd rather avoid hacking a >controller >together, you could hack the communication protocol to the 3rd gen >prius >compressor which has its controller built in. > >Previous attempts were: >- ice water and a fan. was easy to try, but laughable for phoenix. >- use a single phase compressor out of a 5000 BTU window a/c unit with >a >homemade inverter - not enough cooling capacity, need more like 10k-12k >BTU/hr. >- use a 3.5 HP treadmill motor to run the original a/c compressor. >Failed >miserably, not enough power to even get it turning past a few RPM. >- use a 5 HP single phase 240VAC air compressor motor to turn the >original >a/c compressor powered by a homemade 240VAC single phase inverter. The >motor is readily available, so reasonably cheap. This setup worked >well >from a cooling perspective, but terribly inefficient and drew 3-4 kw on >the >hottest days and not much less on the warm days. My electronics failed >on >its second summer, so I spent the winter working on the prius a/c >project. > >A friend of mine has a porsche and belt drives his compressor off the >tail >shaft of the drive motor. It was easy to do, but is about as >inefficient >as my attempt to use a second motor to drive the original a/c >compressor. >And, gotta rev the motor while at a stop light to keep the compressor >going. >http://electricporsche924.blogspot.com/2014/09/ac-update.html > >Joe > >On Wed, Jun 10, 2015 at 2:44 PM, Ben Goren via EV <ev@lists.evdl.org> >wrote: > >> So, I can imagine all sorts of ways that one might run air >conditioning in >> an electric vehicle, but I'm sure others have actually tried and done >> different ways and likely figured out the best general approach. >> >> Any of those others reading these words and care to point me in a >good >> direction? >> >> This'll be starting from scratch in a vehicle that never had air >> conditioning in the first place but for which both factory and >aftermarket >> air conditioning systems are available that run off of a pulley on >the ICE >> engine. >> >> Thanks, >> >> b& >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> For EV drag racing discussion, please use NEDRA ( >> http://groups.yahoo.com/group/NEDRA) >> >> >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150610/b19a29da/attachment.htm> >_______________________________________________ >UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >http://lists.evdl.org/listinfo.cgi/ev-evdl.org >For EV drag racing discussion, please use NEDRA >(http://groups.yahoo.com/group/NEDRA)
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