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[Im97]

I have a problem where I need to determine the line size and also size for a pressure filter regulator that supplies Air to a pneumatic hoist. 

 

The operating parameters of the pneumatic hoist is

- Air consumption - 1.5 m3/min at 6 bar

- Ambient temperature - -5 to -25 degreeC

 

The supply line has operating parameters as follows

pressure - 8 barg

temperature - 35 degreeC

Line length - 30 m

Line ID - 20 mm

 

I calculated the required flow rate in sm3/hr which results to 487 Sm3/hr of Air and based on the pressure drop calculation i performed, the pressure drop was really. I am unsure if the assumptions I made may have been wrong. 

 

Can anyone who has experience advice please

 

[breizh]

Hi,

Let you share your calculation together with a sketch to understand the problem.

You know the requirement to operate your hoist, make sure you match it.

To me forget about Standard condition, this is confusing, define the condition (P,T) to perform the calculation. 

All Pressure should be absolute, Temperature Kelvin.

 

Note: don't use - in front of number, unless it's minus, this is a source of error.

Issue an excel sheet to clarify the input data.

EDIT : With a delta P of 2 bars , I got a mass flow rate of 346Kg/h  or 296 m3/h standard condition (1 bar, 25C)

Pipe size to increase to match the demand.

Breizh