Packaged Unit Good Performance Range
Packaged Unit Good Performance Range
(OP)
Hi
When it comes to packaged units with belt driven drives, what are there any recommendations for where to choose the design operating point? Some of the units I have have an airflow range from 2400-4100 CFM.
One of the unit's I'm looking at will satisfy the required cooling load at 4000 CFM. However, I'm thinking the point seems to close to the edge of the performance envelope since the highest volumetric flow rate listed for this unit is 4100 CFM @ 964 RPM/2.13 BHP
I'm considering selecting a larger unit that can meet the cooling load requirement at an operating point that is not so close to its limits. Am I thinking in the right direction? Or it's perfectly fine to go with the first unit?
Best Regards
When it comes to packaged units with belt driven drives, what are there any recommendations for where to choose the design operating point? Some of the units I have have an airflow range from 2400-4100 CFM.
One of the unit's I'm looking at will satisfy the required cooling load at 4000 CFM. However, I'm thinking the point seems to close to the edge of the performance envelope since the highest volumetric flow rate listed for this unit is 4100 CFM @ 964 RPM/2.13 BHP
I'm considering selecting a larger unit that can meet the cooling load requirement at an operating point that is not so close to its limits. Am I thinking in the right direction? Or it's perfectly fine to go with the first unit?
Best Regards





RE: Packaged Unit Good Performance Range
If it's an air handling unit, fan type will effect your choice.
RE: Packaged Unit Good Performance Range
RE: Packaged Unit Good Performance Range
chicopee: Thank you.
Best Regards.
RE: Packaged Unit Good Performance Range
RE: Packaged Unit Good Performance Range
RE: Packaged Unit Good Performance Range
Willard3: Thank you for the response. I don't fully understand what you mean, but maybe if you look at my reply to Kiwimace you will better understand what I am trying to discuss here.
Best Regards.
RE: Packaged Unit Good Performance Range
RE: Packaged Unit Good Performance Range
Eyeball pressure drop calculations will bite you in the butt.
RE: Packaged Unit Good Performance Range
I don't have a lot of experience yet, but I'll look into that. Thank you.
willard3:
I have not calculated it exactly, but I'm quite sure there won't be a problem. The spaces are some (largest about 45ft x 45ft) large halls, each with its own packaged unit located on the hall's roof. Duct work should be relatively short.