# Calculate the internal contributions in a school

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laurent_caen
I understand econologic
posts: 113
Registration: 07/05/06, 12:41

## Calculate the internal contributions in a school

Hi
I am currently carrying out a thermal study on a school (nursery and primary); I would have liked to know what was the average emission of children of this age (say on average 7 years for a duration of 7 hours per day). Indeed, I have not found on any example of a free thermal balance this value; we simply arbitrarily give a value of 4W / m2 which does not correspond, in my opinion, to the corresponding value in a school since the occupancy rate and the occupant density per m2 are not the same.
In the same vein, I would have liked to know what was the amount of heat recoverable by lighting. For example, on a 30W fluorescent tube, how much heat is returned in the home?
Thank you in advance, I admit that my questions are particularly precise, to say the least .
Good night
Laurent
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dirk pitt
Econologue expert
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Registration: 10/01/08, 14:16
Location: isere
x 69

the body gives off around 5mW / cm2 at rest and twice as much in average activity (walking, moving)
an adult depending on their weight and size is between 1.6 and 2.2 m2
a child of 10 years approximately half is approximately 50W of heat emission at rest
human surface = 0.024265 size (cm) ^ 0.3964 x weight (kg) ^ 0.5378
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Christophe
Moderator
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Registration: 10/02/03, 14:06
Location: Greenhouse planet
x 9896

Yes dark pitt, we take between 70 and 120W depending on body size but especially the activity for an adult.

I think 70W is the average over 24 hours.

[quote] the body gives off around 5mW / cm2 at rest and twice as much in average activity (walking, moving)
an adult depending on their weight and size is between 1.6 and 2.2 m2 / quote]

These precise figures are interesting, how / where did you get them?
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