............And our bus engines turn on average at 2400 rpm. this means the small compressors would only be able to put out 1/3 of the cooling that they can produce. Unless someone has an idea on how to spin themfaster on a bus engine??? Let me know! .......
Thanks for bringing up the rpm/ capacity point.
You could belt from the crank shaft pulley to a smaller dia pulley on a jack shaft. Then have a large pulley on the jack shaft belt driving the compressor. (The the belts & pulleys would need to be sized properly for it to last). I like the idea of an over the road A/C that uses an engine driven compressor for additional cooling of the front of the bus while driving.
Most people don't realize that an auto A/C is 3+ tons capacity. My 3 ton home unit pulls 26 amps at 220 volts, so wouldn't that be 475amps at 12 volts or 238 at 24volts. Then you have to add in the efficency losses. The electric power has to come from some where. The advantage of all electric A/C is that you can run it off the genset & leave the main motor alone to push the coach up the mountain.
BTW, I like trying to reinvent the wheel, sometimes you get lucky, but mostly you learn why it is the way that it is.