Refrigerant Flow Rates

[ROSS VAN DUGTER]

Can any one provide refrigerant flow rates for
R134a & R404A (SI units preferably)
i.e for refrigeration pipe sizing
Or general info for refrigeration Pipe Sizing

Thanks Ross V

[Josip]

Hi, Ross Van Dugter

Welcome to RE.

Can any one provide refrigerant flow rates for
R134a & R404A (SI units preferably)
i.e for refrigeration pipe sizing
Or general info for refrigeration Pipe Sizing

Thanks Ross V

I'm sure somebody will come with info you need.

Best regards, Josip

[Brian_UK]

Hi Ross,

Try this pdf download from DuPont, it's a 161 page handbook..

http://www.suva.dupont.ca/pdf/RefrigPipingHandbook.pdf

[Bones]

http://www.suva.dupont.ca/pdf/RefrigPipingHandbook.pdf

[Brian_UK]

Thanks Bones for posting the correct URL.

I've amended mine now....

[Bones]

no worries brian!

i clicked onto the click thinking it must of been a folder on there site... did a quick search at the error page for refrig piping etc, then seen the '.' and thought i bet its a PDF! and bingo hehe

[nh3simman]

Can any one provide refrigerant flow rates for
R134a & R404A (SI units preferably)
i.e for refrigeration pipe sizing
Or general info for refrigeration Pipe Sizing

Thanks Ross V

You ask initially about refrigerant flow rate. This is a function of the duty and the refrigerant only, not the line size.

The relationship is

Qe = mr x dh
Qe = cooling duty, kW
mr = refrigerant mass flow, kg/s
dh = refrigerating effect, kJ/kg

dh can be read directly off a MollierChart at the suction temperature.

Now that you have the flow needed to achieve the duty, you can choose a line size that satisfies the max pressure drop and min velocity criteria.

The other methods offered are easy to use since they give nomograms for quick lookup.

[EngrinQatar]

ty for the link Bones