Hello All,
I am working on a paper, where I need to discuss about the perception of a human being when the ambient temperature around him increases.
I am assessing a situation where the engine has been turned off by Engine Stop/Start System, and AC is thus rendered ineffective, till the engine has been restarted.
Once the engine has been stopped, the cabin temperature starts to increase gradually, and get stabilized around the ambient temperature after certain time. The rate of increase in temperature depends on many factors like air delivery speed, initial temperature difference between cabin and outside, and many more.
My concern area is, the difference between initial and current temperature at which a human being will actually start feeling that the temperature has increased.
If you can help me with some citations in this regard it will be of great help.
Thank you very much Aleš Kralj for the reference. I completely agree with on your experience and observation on this behavior in European Cars.
However, when it comes to cars we have here in India, the evaporators are sized very optimally to cool the cabin only till the engine is running. In the event of no way to resize the evaporator or using a cold storage type evaporator, we are working on something.
Human temperature perception is a difficult thing: as the body interacts with the environment (per sweating), even a change in air flow results in a change of temperature perception. (search for "chill factor")
So a change in air flow will immediately result in a change of temperature perception. Regarding the stop of AC, this may or may not be overlayed by effects of direct radiation absorption, which could easily dominate any change in 'objective' air temperature.
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