Back on topic... Here is some boring, yet educational knowledge concerning A/C and the venue. Pay attention, as there will be a quiz on Thursday when I arrive
Anyone notice that when the arena is packed and the foyers are nearly empty, that is hot as hades - even on the floor - in the arena, yet arctic like conditions outside in the halls... But within minutes of a band finishing and everyone emptying out, it quickly reverses and the hallways turn into saunas while the inside venue cools down to a nice spring day?
SCIENCE!!! ;-)
The human body on average produces 250 BTU's depending on weight and size of a person. To know what a BTU value is, 1 BTU = 1 burning match. So, one person is like a nice pile of 250 burning matches.
Now, take 1,000+ people in the venue x 250 = ...a raging camp fire.
I don't know what kind of units the venue has or the capacity they are designed for, but judging by the size of the building, I would guess that they have probably 4 separate 5 ton systems.
It takes 1 ton of cooling to remove 12,000 BTU's of heat. So, 5 tons of cooling per unit removes 60,000 BTU's of heat x 4 = 240,000
Still with me? ...good!
With this rough guess calculation, you can see that it comes close to handling the load to keep thing comfortable. Mind you, this does NOT calculate the BTU Output of the lights, amps and other gear that produce heat.. Or the extra BTU expelled by those mysterious rotten egg farters.
But wait, that's not all!
The hotter it is OUTSIDE the venue (ambient outside air temperature ), the less efficient the A/C system is, thusly affecting the ability to remove heat from inside the building.
So, if it's 95+ outside... It's going to be a little rough inside of the venue if it is at occupant capacity. A nice 78+ outside? Should be pretty good inside where there are not many people crammed together
...any questions?
m/
Your resident Progpower HVAC/R guy