Recent content by Sola

Russ, Ok now the formula makes sense but I am stunned how much heat is generated and how quick. Still thinking I am missing some variable

Russ, Thank you, This is a great learning experience.

TY for your help on my Rate of Rise challenge. I think I got the math right. I tried this earlier but it seemed so far off. 84 F per minute would fry everything in the room My basic attempt to come up to 84 F per min using 80 kW = 276300 BtuH x .24 = 1,151,250 (is this potential lbs of heat...

Additionally I would have a start point of 70 F and average ambient of 50 F, as we have locations across the country

So ? m= mass (volume of air in the space )3000 cu ft or 229 lbs ? Cp=total heat capacity of air would I use 1 or .718 (Cv) Delta T I think so.. Let me take a shot. My initial approach was to convert the 80 kW to Btuh (276,300) / 60 (minutes), div by 229 (lbs) = 20 deg F per minute. That...

TY Russ, Is there a formula or calculator to input the room data. Per above without getting very specific on building envelope for a telco hut. 20 x 15 x 10' CMU exterior, r-19 wall insulation, no windows, metal truss roof with 4" roof rigid roof insulation on a metal corrugated deck. We use...

BTW as a new user, where would I find posting procedures? TY for the help

I am making broad analysis without many specifics, No air flow, minor leakage (10%) There are split systems in the space. Ambient I choose is 50 F. The various IT equip will shut off at various temps above 105 F. My question is "what is the heat RoR" with the 80 continuing to heat the space...

How did you find PF?: Google l was asked how hot would our IT space get if we lost all air conditioning. The space is 20' x 15' x 10', We keep set point at 70 F and have 80 kW of load. Assuming this exists in a well insulate container with 20 racks of equipment. Doesn't have to be perfect but...