How Does Perspiration Help Regulate Body Temperature?

[rpayne88]

I'm not sure this is the best fourm to post this, but...

How much heat, preferably in watts, does perspiration dissipate under mild exertion (i.e. walking) on a 90° F day? Assume the individual is hydrated and not starving. Also assume they weigh 180Lbs.

How much heat would have to be dissipated to make the person feel comfortable (i.e. as if standing in a 70° F air conditioned building?)

 

[russ_watters]

You can probably extrapolate from this:
http://www.engineeringtoolbox.com/metabolic-heat-persons-d_706.html

FYI, heat dissipation is calculated at steady state and isn't really related to comfort. You can't feel comfortable when it is 90F no matter what you do. All you can hope to do is dissipate enough heat to not die.