Hello Engineers.

For the drop-in hydrocarbon replacements for R134a systems (Auto A/C) that are 50/50% R600a and R290 the charge should be half, but on most documentation I read that the recommended charge is only 1/3, mentioning because of the superior ability to reject heat that only 1/3 is needed.

I'm wondering what would be the consequences if 1/2 charge is added (e.g 500g hydrocarbons where 1000g R134a is specified), instead of 300g of hydrocarbons.

Would the system cool better and be more efficient? more liquid avaliable to the TX valve at all times?

Is there more reasons why 1/3 of charge in hydrocarbons of the original r134a charge is recommended instead of half?

Thanks.