The problem of hot cabins and the sensation of coldness has been discussed at length in the past. Any temperature over 78 degrees and the DRY air decreases the exchange of Blood levels of Oxygen & Carbon Dioxide in the lowered pressure cabins resulting in shortness of breath, headache, anxious feelings, etc.
Originally Posted by
AlwaysAisle
I am PhD chemist with biochemistry background. I am little interested to know which study indicates such physiological nature. I just little curious what research data showed such tendency.
I believe that R&R is trying to describe
Hypoxia. As the ambient temperature increases, the volume of a gas will increase (Boyle's Law). This means that inhaling the same volume of air into your lungs will yield a lower number of o2 molecules actually making it into your bloodstream.
However, I question whether there is really some kind of line at 78 degrees, above which humans will begin to have problems. A 4 degree F (2 degree C) difference (between 78 & 82 F) seems too small to me to really have any kind of a significant effect. I tried to find anything online that referenced such a phenomenon but was unsuccessful.
-S