friction losses with waste oil 1

[MachinaMan]

Hi Everyone,

I am looking at using a storage tank to supply waste oil (similar to #5 oil viscosity) to a suction line for positive displacement process pumps.

I am trying to see if I will need a pump to overcome the friction losses in the suction line to my process pumps or if the level of my storage tank will provide enough static head (more like what level will provide enough static head).

My question is:
Can I use the friction loss equations for waste oil and use these in the Bernoulli equation? or are these equations only suitable for water? My reference book is not clear on the subject.

hf=f*(L/D)*(V^2/(2*g))
hf=K*(V^2/(2*g))

Thanks for your help,

R

 

[BigInch]

The equations you have shown are valid for oil and any fluid, if you evaluate the friction term appropriately. You will need the viscosity and density of the oil to determine f.

http://virtualpipeline.spaces.msn.com

 

[25362]

Is the waste oil reasonably clean and homogeneous ? Waste oils may contain variable contaminants (e.g., emulsified water, suspended soot, thermal and oxidative degradation by-products) which may affect viscosity, density and flow behaviour.

 

[MachinaMan]

Hi Guys,

Thanks for replying.

BigInch: That is what I figured, but I couldn't find proof in my references, Thanks - a star for you.

25362: The oil we are using is reprocessed waste oil, it is homogeneous and clean. We receive lab reports with each shipment. But you do have a good point, Thanks.