h a l f b a k e r yExpensive, difficult, slightly dangerous, not particularly effective... I'm on a roll.
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Heat is an unavoidable product of frictional braking. The high
temperature is the biggest bottleneck of performance braking
on a budget. There's also a lot of energy lost. Proposed is a
thin heat exchanger plate placed on the back of the brake
pads (between the pad backing and the wheel cylinder
piston). It would likely be made of a copper alloy. Pipes
running on either side of the heat exchanger plate would
plumb water to a turbine regenerator to recover some of the
energy that's lost. The boiling would cool the plate and help
improve the performance of the pad under certain conditions.
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The water cooling jacket might have some merit; I doubt there's enough heat that would make the turbine regenerator of any real benefit though, unless youre talking about race cars specifically. |
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Using electric motors to recapture waste energy is baked in most hybrids and is more efficient than the turbine would be. |
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I like the thin jacket idea. The steam generation...I don't agree
that
it is of any use.
But back to the water cooling behind the pads: The jacket would
need to withstand some quite large compressive forces, and also
be wafer thin. The water-filled jacket might make the brakes
"spongy"? |
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// The jacket would need to withstand some quite large compressive forces // |
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Not if the hear exchanger were annular, and the force was taken by the centre pillar and rim of the carrier. |
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But the pads are refractory ... the place you want to extract the heat is the disc. That's metal, and intrinsically conductive. |
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Water- cooling the hub would be better. |
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I agree that the disc is better, but it rotates. The pad is not as
refractory as you think, that's why brake fluid can boil. |
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