Quote:
Originally Posted by blw2
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The thing is only capable of so much energy transfer and is only so efficient. No doubt improvements can be made...and you've suggested some things that make sense...but at the end of the day it's taking in air and can only drop the temp of that air so much. It's how much it's dropping it that is what will tell you how well your improvements work.... the difference, or delta T... the outlet temps are only part of the equation....
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A significant portion of the A/C’s rated capacity is used to remove moisture from the air. You’re correct that measuring temperatures alone doesn’t tell the entire story. When tested for certification, these A/Cs are operated under controlled conditions which includes relative humidity.
One thing that is a CERTAINTY is that when A/Cs are operated at lower evaporator pressure/temperature, they will require more power per amount of cooling; assuming everything else remains the same. The compressor has to elevate the refrigerant from a lower pressure up to the condensing pressure. That means lower A/C thermodynamic efficiency. You also lose overall cooling capacity.
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