measuring freon added by volume 1

[rcr22b]

I want to charge a copper tube with 50% by volume of freon 134a.

I know the volume of the tube is 15.9 cubic inches but I only have a pressure gage.

The Freon can contains 12 oz by weight and I have no idea how much to add to the tube or how to measure it accurately.

This is not for an air conditioner but will be used for a solar tracker.

Can anyone help with this problem?

 

[Waramanga]

we would have to assume that you are after 50% liquid volume which you cant do with just a guage (pressure temperature of the liquid). You will need a scale to weigh the equivilant of 50% volume of 134a into the tube.

 

[rcr22b]

Waramanga,

The can holds 12 oz by weight.

If I knew how much 1 fluid oz of freon 134a weighs then

I could weigh the can to see how much freon I have put in the system.

But I could be overlooking something.

 

[DrRTU]

I would charge by liquid only (upside down and use an accurate scale). The temperature of the fluid will change during charging. Most manufactures can provide liquid density tables based upon temperature. 134a should have a liquid density of, lb./ft - @50 F = 78.7, @70 F = 76.2, @105 F = 71.4