It has been reported that a normal maximum perspiration rate is about 1.5 liters/hour, but that after 4 to 6 weeks of acclimatization in a tropical climate, it can reach 3.0 liters/hr. What maximum cooling power does this represent?
2007-03-07 00:04:43 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
The value I have for latent heat of evaporation for water is 2257 kJ/Kg
If we accept that sweat is mostly water (1Kg = 1 litre), and that it all evaporates, this gives us a figure of
3 Kg/hour * 2257 kJ/Kg = 6671 kJ/hour
That is 6671/3600 = 1.88 kJ/sec or approximately 1.9 kW
2007-03-07 00:24:07 · answer #1 · answered by lunchtime_browser 7 · 1⤊ 0⤋
Approximate 1 litre of water to be 1kg and the latent heat of evaporation is 2270kJ/kg so the energy disposed of is
3*2270=6810kJ.
The power is then 1.891 Kilowatts
2007-03-07 00:17:51 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Who cares. I ANSWERED IT FIRST. gIVE MY 10 POINTS
2007-03-07 00:07:56 · answer #3 · answered by Anonymous · 0⤊ 1⤋
who cares. i dont
2007-03-07 00:12:04 · answer #4 · answered by mummy to 3 miracles 5 · 0⤊ 1⤋