When a whale dives after having taken a breath at the surface, it will experience higher pressure, and as a consequence the air in its lungs will be compressed and should get a little warmer. This warmth will diffuse to the rest of the whale and the whale’s surroundings over time, and then when they go up to the surface again the air in their lungs would get cooler. I suppose this isn’t really a continuous pump, more of a single action which involves pressure and temperature.
Any animal which is capable of altering it’s own internal pressure for an extended period of time should technically qualify, since pressurising an internal cavity will make the gas or liquid within hotter (and this heat will eventually radiate to the animal’s surroundings). Then the animal can cool down by reducing it’s internal pressure. This effect might be negligible for the low pressure differences produced by most animals, but should still be present.
Bivalves use their powerful bodies to suction themselves to a surface, and sea cucumbers can change their internal pressure to become rigid or flexible. You might have some luck there?
Theoretically, humans should be able to do a very small amount of heat-pumping, by taking a large breath of air and then compressing it as much as possible using your diaphragm and chest muscles. This should cause the air to heat up a little (though I doubt it would be noticeable).
When a whale dives after having taken a breath at the surface, it will experience higher pressure, and as a consequence the air in its lungs will be compressed and should get a little warmer. This warmth will diffuse to the rest of the whale and the whale’s surroundings over time, and then when they go up to the surface again the air in their lungs would get cooler. I suppose this isn’t really a continuous pump, more of a single action which involves pressure and temperature.
Any animal which is capable of altering it’s own internal pressure for an extended period of time should technically qualify, since pressurising an internal cavity will make the gas or liquid within hotter (and this heat will eventually radiate to the animal’s surroundings). Then the animal can cool down by reducing it’s internal pressure. This effect might be negligible for the low pressure differences produced by most animals, but should still be present.
Bivalves use their powerful bodies to suction themselves to a surface, and sea cucumbers can change their internal pressure to become rigid or flexible. You might have some luck there?
Theoretically, humans should be able to do a very small amount of heat-pumping, by taking a large breath of air and then compressing it as much as possible using your diaphragm and chest muscles. This should cause the air to heat up a little (though I doubt it would be noticeable).