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Old 02-25-14, 10:50 AM   #34
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Originally Posted by jeff5may View Post
how about a water analogy? If you only have 20 psi of water pressure, you're going to need much larger supply pipes to feed the same gpm than if you had 50 psi of water pressure.

Yes, the laws of physics still apply, but with R410a, the increased pressure and corresponding gas density lends itself to smaller hx size and tube diameter at the same exchange capacity. Obviously, this effect is much more prevalent in the condenser side.
I think that your comparison breaks down because the water analogy assumes pressure at one end of a pipe, and no pressure at the other end.

In the refrigeration circuit, all events take place within a hermetically sealed 'world', thus the pressure is balanced. Refrigerant flow is caused by the "unbalancing of pressure" due to the work of the compressor.

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