Daikin VRV-WIII User Manual Page 22

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© 2013 Daikin North America, LLC
Slide 23 Slide 23
20 40 60 80 100 120 140 160
Compressor frequency [rps]
Compressor
efficiency
Efficiency curve: T
E
= 43°F / T
C
= 95°F
Efficiency curve: T
E
= 48°F / T
C
= 95°F
Efficiency curve: T
E
= 52°F / T
C
= 95°F
Nominal
efficiency
Efficiency Benefit
With a higher refrigerant temperature, the compression ratio falls so the
compressor doesn’t have to work so hard.
This prevents it from operating at it a less efficient low operating speeds.
OPTIMAL COMPRESSOR EFFICIENCY
ZONE (EFFICIENCY ISLAND)
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