Quote:
Originally Posted by Chonk_Master
With a series system branching from and returning to the same pump, I think you might get some advantage in mass flowrate. It might be higher if the overall volume is greater than a comparable series system. If it's the same total volume as an series system, don't think you'd see any flowrate advantage. But you could probably use the same size radiators.
Series might be tricky since one radiator is going to see hotter coolant. Different sized radiators? Can't think of any real advantage to this, other than simpler piping. Mass flowrate can be bumped up with larger hoses.
Pick needed heat transfer rate > figure out overall required mass flowrate for radiators that fit (Area) > compare to flowrates of series and parallel system constructed from available materials (?)
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Depending on your cooling load using coolant to heat large flat horizontal surfaces like the car underbody and hood while keeping the grill completely closed might yield the same effect, possibly a little better since you could reduce turbulence
The radiator would become thermal mass after said surfaces and only open when needed for additional cooling.