Reflections on watercooling: Difference between revisions

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** A processor without a heatsink is depositing heat directly to stagnant air, which will heat up (reducing the temperature gradient) and can't take much heat anyway.

** Adding a heatsink means the heat is deposited into a good conductor with more surface area...which in turn deposits into stagnant air. This air will heat up, and eventually the heatsink will, as well.

** Adding a waterblock to the ~~heatink~~ means that heat is deposited into water as opposed to air. That water has ~4 times the heat capacity of air, meaning it takes more 4x heat to raise a unit mass of water by one degree. Furthermore, that water is ~800 times denser than air, meaning there's much more mass per unit volume. As noted above, the water is ~100 times as thermally conductive. It thus takes heat better, and the temperature gradient is lessened much less quickly. With that said, it's still depositing its heat into stagnant air, and <i>will</i> reach equilibrium with the heatsink given sufficient time.

** Adding a waterblock to the heatsink means that heat is deposited into water as opposed to air. That water has ~4 times the heat capacity of air, meaning it takes more 4x heat to raise a unit mass of water by one degree. Furthermore, that water is ~800 times denser than air, meaning there's much more mass per unit volume. As noted above, the water is ~100 times as thermally conductive. It thus takes heat better, and the temperature gradient is lessened much less quickly. With that said, it's still depositing its heat into stagnant air, and <i>will</i> reach equilibrium with the heatsink given sufficient time.

** Adding fans moves the hot air (ideally out of the case), to be replaced by ambient air. The ejected hot air will diffuse into the ambient air, which is (ideally) a large convecting volume.

** Adding more water (via tubing and reservoirs) is like using a larger case: there is now more water to heat up. The heat moves through the water slowly, however; the water closest to the heat-producing components is still likely to overheat.

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 ** A processor without a heatsink is depositing heat directly to stagnant air, which will heat up (reducing the temperature gradient) and can't take much heat anyway.
 ** Adding a heatsink means the heat is deposited into a good conductor with more surface area...which in turn deposits into stagnant air. This air will heat up, and eventually the heatsink will, as well.
-** Adding a waterblock to the heatink means that heat is deposited into water as opposed to air. That water has ~4 times the heat capacity of air, meaning it takes more 4x heat to raise a unit mass of water by one degree. Furthermore, that water is ~800 times denser than air, meaning there's much more mass per unit volume. As noted above, the water is ~100 times as thermally conductive. It thus takes heat better, and the temperature gradient is lessened much less quickly. With that said, it's still depositing its heat into stagnant air, and <i>will</i> reach equilibrium with the heatsink given sufficient time.
+** Adding a waterblock to the heatsink means that heat is deposited into water as opposed to air. That water has ~4 times the heat capacity of air, meaning it takes more 4x heat to raise a unit mass of water by one degree. Furthermore, that water is ~800 times denser than air, meaning there's much more mass per unit volume. As noted above, the water is ~100 times as thermally conductive. It thus takes heat better, and the temperature gradient is lessened much less quickly. With that said, it's still depositing its heat into stagnant air, and <i>will</i> reach equilibrium with the heatsink given sufficient time.
 ** Adding fans moves the hot air (ideally out of the case), to be replaced by ambient air. The ejected hot air will diffuse into the ambient air, which is (ideally) a large convecting volume.
 ** Adding more water (via tubing and reservoirs) is like using a larger case: there is now more water to heat up. The heat moves through the water slowly, however; the water closest to the heat-producing components is still likely to overheat.

Reflections on watercooling: Difference between revisions

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