CapTube efficiency loss at high temperatures

[Typhoon]

Good day everyone .

Just wondering if any one has any idea, or data as to the percentage efficiency loss of a Captube refrigerant control device that is originally designed to operate at 72 F . Put that same system in a 90 F environment causing the condensing temperatures to rise accordingly , therefore increasing the bubble length in the Captube . Any one have any idea as to the percentage of loss of efficiency in such a scenario? Or where I could find any data regarding this .

Regards

[Typhoon]

Thanks for the reply .

I understand that point but as temperatures rise and you get less sub-cooling , flashing occurs sooner in the tube which causes more restriction. The system will still operate like this but at reduced efficiency.

https://www.achrnews.com/articles/97160-the-critical-nature-of-cap-tubes

And this article which got me thinking.

https://icemeister.net/backroom/wp-content/uploads/2015/04/Capillary-Tubes-by-Henry-Ehrens-Condensed-Version.pdf

Short of building two identical systems set up for maximum efficiencies at 72F and then raising the ambient temperature , one with a captube and one with a TXV and measuring the energy use , if there was already some data out there as to a efficiency percentage loss.

Regards