5 replies to this topic

[Niru1234#]

Hello everyone,

I have a blower which is designed for 5500 CFM. But the CFM calculated from the outlet velocity of the blower was 6000 CFM. What does this mean? I have attached the Diagram of the blower which is attached to a mixer. How do i calculate the velocity at the outlet of the mixer. I need a velocity of 35-40 m/sec. But i don't know whether the blower is creating that much of velocity at the mixer outlet. Can someone please help me out with this?

Thanks in advance

 

Attached Files

•  mixer2a.jpeg   63.52KB   1 downloads

[breizh]

Hi ,

What is the problem ? To me a flow rate of 5500 CFM or 6000 CFM is quite similar . How did you get  these figures?

Did you try to close the valve at the suction of the blower ?

If the velocity is an important parameter , can you install a pitot tube to measure the velocity at the outlet of reactor ?

 

Good luck.

 

Breizh

Edited by breizh, 31 July 2015 - 05:14 AM.

[Bobby Strain]

Your sketch leaves much to the imagination.

 

Bobby

[Kiran T]

I totally agreed with breizh sir.

[Niru1234#]

I have a blower which is rated for 5500 CFM and 12 W.G static pressure.What does this Static pressure indicate? Do i have to calculate the pressure drop across the whole ducting at the inlet of the blower and locate the actual CFM from the performance curve? As per the PFD of the process, a blower velocity of 35-40 m/s is required to remove the moisture from the mixer which we have. For that i can have a pitot tube as you said... How do i calculate the system pressure drop? I only have absolute pressure at the outlet of the mixer

Thanks

[breizh]

nirul ,

My advice : Google "blower static pressure calculation" , you will find a bunch of info , information and calculators

Good luck .

Breizh

Edited by breizh, 02 August 2015 - 02:12 AM.