Every schoolboy knows that most of the human body's latent energy is lost through the top of the head.

Why not invent a hat, possibly made of metal (see link), that channels this energy to spent batteries, which can dangle off the brim of the hat, much like corks on a stereotypical Austrailan bushman's headwear.

After a brisk walk, the batteries will be fully charged, ready to be employed in electrical paraphernalia of your own choosing.
-- kpx, Sep 19 2001

Soid Gold Hat Shop http://www.halfbake...20Gold_20Hat_20Shop
Where to buy metal hats [kpx, Sep 19 2001, last modified Oct 04 2004]

That energy loss you speak of is thermal, presumably. The human head doesn't actually produce or need to dispose of more heat than any other similarly-sized portion of the body; it only accounts for a disproportionate amount of the human body's heat loss when the rest of the body is disproportionately insulated by clothing.
-- notexactly, Oct 18 2019


That energy loss you speak of is thermal, presumably. The human head doesn't actually produce or need to dispose of more heat than any other similarly-sized portion of the body; it only accounts for a disproportionate amount of the human body's heat loss when the rest of the body is disproportionately insulated by clothing or bedding.
-- notexactly, Oct 18 2019


A seebeck-effect thermopile would be able to harvest a small amount of energy this way, but the hot-cold junction temperature differential would be quite low.

It would however be capable of delivering a high voltage, enough to run the HT side of a thermionic valve device.
-- 8th of 7, Oct 18 2019


The brain actually uses something like 20% of the body's energy.
-- MaxwellBuchanan, Oct 18 2019


That accounts for Sturton's extremely active and vigorous ... no, well, let's not discuss that.

But it's clear from his behaviour that whatever brains he has, if any, aren't located within his cranium.
-- 8th of 7, Oct 18 2019


Don't let Sturton's outward appearance deceive you. On the surface, he appears as a drunken, drug-addicted gourmand with dubious tastes in clothing, bedfellows and relatives. However, given his size and shape, his surface to volume ratio is extremely low.

When sober (which happens seldom; but instantaneously when necessary), he has one of the greatest minds in Europe. Give him an intractable problem or an insoluble mystery, and he'll have a solution by the time you've finished speaking. He is a chess grand-master, has co- authored a series of papers on the computational density of free space, and consults for the UN when the mood takes him. He also plays blackjack and baccarat from time to time, and supports his life (I hesitate to call it a lifestyle) in this way, although he is banned from most casinos.
-- MaxwellBuchanan, Oct 18 2019



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