4 ms·
evaporation done with hot wind has two effects working in opposite directions. The evaporation is a cooling effect, but the hot wind is a heating effect. So if
by quantadev 2y ago
evaporation done with hot wind has two effects working in opposite directions. The evaporation is a cooling effect, but the hot wind is a heating effect. So if the hot wind is moving too fast or is too hot, it's effects will be larger than the effects of any evaporation, resulting in heating rather than cooling, due to increased airflow, or too high a temp.
- mmooss 2y agoThey connected the insufficient cooling to the rate of evaporation being too rapid: "The air was so dry that any sweat quickly evaporated, resulting in little additional cooling ..."
- quantadev 2y agoI wasn't correcting or disagreeing, just providing more info that there's two effects going on. Hot airflow always adds heat, and evaporation always reduces heat, so you only get cooling if the evap energy loss exceeds the heat transfer rate.