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asked 2017-09-29 02:17:10 -0500

katsuya.obara's avatar

VRF system shows high COP compared to specified COP

Hi all,

I am modelling a VRF system for a typical office building in Hong Kong.
The result shows high COP compared to specified COP.
in HVACTemplate:System:VRF, Gross Rated Cooling COP is set to 3.68 as shown in below image. However, the result COP sometimes reach to 6 which is much higher than specified value.
I am assuming that this is caused by default performance curve prepared by EnergyPlus.
Can anyone come up any other possibility causing this high COP situation?
image description

image description

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updated 2017-09-29 02:33:24 -0500

Julien Marrec's avatar

VRF system shows high COP compared to specified COP

Hi all,

I am modelling a VRF system for a typical office building in Hong Kong.
The result shows high COP compared to specified COP.

in HVACTemplate:System:VRF, Gross Rated Cooling COP is set to 3.68 as shown in below image. However, the result COP sometimes reach to 6 which is much higher than specified value.

I am assuming that this is caused by default performance curve prepared by EnergyPlus.
Can anyone come up any other possibility causing this high COP situation?
image description

image description

image description

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