Re: AC theory question
Haynes has a nice automotive a/c book, for learning the basics, and other methods, I recommend it.
as far as the charge goes, it's based on compressor volume capabilities, orifice or expansion valve flow characteristics, surface area of the coils along with its volumes, and airflow. it's a HIGHLY complicated formula to compute. which is why manufacturers always list refrigerant volumes on the vehicles.
you have enthalpy formulas along with P/T charts, and phase charts...
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Originally Posted by compu_85
John,
I have a question about AC systems in general: How do you figure out how much charge a system needs? IE say you just put together a whole system from scratch. Is it all based on temp / pressure charts? I saw one reference that said when the inlet and outlet of the evaporator are at the same temp it's correctly charged.
I'd love to learn more about this stuff... do you have any recommended reading?
Thanks,
-Jason
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