minimum rpm

[Hind5]

I have max rpm value and i need to get the minimum rpm at 0.09% of the load.

if I have unit with 3 compressor 2 of 7980 rpm and one with 6300 rpm can i get the max rpm of the unit?

any help? thanks

 

[Hind5]

Sorry why no one have replied? is the question in the wrong forum?

Any Help?
thanks

 

[alansimpson]

I'm afraid you have not explained the problem clearly.

What is the application?
What are you trying to achieve?

 

[Hind5]

Thanks Alan,

1- I have a air cooled VRV with outdoor unit the compressor work form 9% to 100% load, with max rpm 7890.

I need to the formulas that give me the rpm at 9% of the load, I was searching I found that HP1/HP2=(RPM1/RPM2)^2

with HP = horse power.
the compressor is reluctance brushless DC compressor.

Is that true available

2- If I have outdoor units with 2 compressor one of them have max RPM = 7980 and the second max RPM = 6300.
It is logical to get one value max RPM for the outdoor unit

any help is appreciated.
hope this is clear
thanks

 

[BrianPetersen]

It is not clear at all.

What is a VRV.

What are you trying to operate at 0.09% load.

If it is the compressor that you are trying to do that with, what kind of compressor is it. (piston or other type of positive displacement device, centrifugal blower, etc.)

What are you compressing? Air? Freon? Natural gas? Something else?

The formula that you are using relating the RPM to the horsepower may apply to one very specific type of device, but not at all to another, and without a single clue of what you are talking about, it's impossible to know whether it applies to YOUR type of device.

Spill ALL the beans. ALL of them. Nobody can give any sort of constructive answer when 90% of the required information is missing.