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Thanks for this elaborate but illustrative example! It did help clarify a lot of things and think I understand the basis of this effect now.
What I meant by the constants is exactly what you...

??? What's that supposed to mean?

BTW, thank you to all the other posters that posted useful information!

Sam

Yes, the vapor pushes the liquid. But if the volume taken up by the liquid in the system is constant (with ambient temp), which should be the case more or less, since the liquid line is supposed to...

Ahhh.... I see now, so with increasing ambient condensor temps, the head pressure raises and obviously the liquid temp, then the evap temp and pressure is also higher, which causes less heat...

I understand that the head pressure goes up with temperature, but it is still a closed system, so the density of the refrigerant that the compressor is pumping is still the same. So how can the...

I am looking at a superheat charging chart and there is one thing I don't understand. I know how to use the chart, I just want to understand the thermodynamics.

When the ambient condensor...