Nice! Thanks for filling the gaps for me.The radiators are Champion radiators designed for 125cc shifter karts. Paul used a single Kawasaki motorcycle radiator but was only cooling the inverter/motor/dc-dc/obc, not the batteries. I first purchased a dragster radiator with nice threaded AN bungs but it didn't fit in the core support opening so I went with the kart units. They have 5/8" nipples, which matches the nipples on the Tesla drive unit and the OBC/DC-DC.
I'm actually happy now to have separate loops for the batteries and other units, as the desired/critical temps are quite different. The batteries want to live at 80-100F while the motor/inverter/PCB runs at 130F so I don't have the motor heating up the batteries. I have two separate temp sensors controlling when the fan comes on, each set at different thresholds. Tesla does this with valves, which is also possible.
The pumps are Bosch 0 392 022 002 , designed for liquid/air intercoolers. 1200 liters per hour (5.2 gallons per minute). OEM quality. They draw about 4 amps.
The A/C condenser is a generic parallel flow unit. 16" (406 mm) X 20" (508 mm) X 0.709" (18 mm). That's about as large as you can fit in there and still get to the hose fittings.
I'm using the electric A/C compressor from Tesla model S (2013 / 2014), part number 6007380-00-D. It is actually made by Denso (ES34C) and used on some Mercedes as well, I believe. It is 300+ VDC, PWM controlled so you'll need something that can generate the PWM signal for speed control. I will most likely use an Arduino but I haven't finished all my HVAC yet.
While I do have a high voltage heater for the cabin, I'm not doing any battery heating. I live in Southern California and this is a "fun" car so I can ignore a lot of extreme weather concerns, especially cold. As you probably know, Tesla has some very complex temperature management, with both heating and cooling (via A/C). Paul drove his car for a year without any battery heating or cooling and was fine so, for me, a lot of this is just to have flow for consistent temps.
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