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High density load in datacenter

asked 2018-05-11 08:54:44 -0600

HJOJOA gravatar image

updated 2018-05-14 04:39:05 -0600

Dear Unmet team,

Running a simulation for a datacenter project, in a 200 M2 IT room with 160 Kw IT load, something funny happens:

Description, 200 m2 area, 3m height, DX air system air-cooled, roof and walls exposed, floor ground. Supply temperature 20C, return temperature 32C.

1- If the IT load is low (10 Kw) the simulation runs well

2- If the IT loads is high (160 Kw) the simulation fails, warnings and severe errors are presented.

Warning ** Inside surface heat balance did not converge with Max Temp Difference"


Severe "the surface temperature is out of bounds"

Does somebody know how to solve it?

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answered 2018-05-11 12:34:07 -0600

Avi gravatar image

It is a guess but might work: When you changed the load you changed it in the run period and not in the design days so the DX is sized to the lower load and that is why it can't satisfy the high load. That is if you auto sized your DX. You might want to start with Ideal Air Load System.

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Hi, I tried again, create new file, run first ideal loads with 160 Kw and works good, but then i added a new air loop ant the simulation fail.

HJOJOA gravatar imageHJOJOA ( 2018-05-11 14:25:59 -0600 )edit

@HJOJOA forget about ideal load. just make sure to change the load in design day. If you can post a link to your model I will take a look.

Avi gravatar imageAvi ( 2018-05-11 15:24:14 -0600 )edit

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Asked: 2018-05-11 08:54:44 -0600

Seen: 112 times

Last updated: May 14 '18