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designbuilder v7 simple hvac seasonal cop has no effect

asked 2022-11-29 01:42:33 -0600

ashopinion's avatar

updated 2022-11-29 09:29:02 -0600

Working in simple HVAC mode, ideal loads, separate fan/pump power.

On the HVAC tab I've used multiple simple HVAC templates, as well as my own and varied the seasonal heating/cooling COP's from 0.8 to 5. These have no effect on the the heating/cooling energy use according to the annual summary energy end use report. Similarly, the HVAC template ventilation tab has a supply fan static pressure that appears to have no impact on energy use, nor does the auxiliary energy use (kwh/sf) on the general tab. Any idea what settings I'm ignoring?

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answered 2022-11-30 07:58:39 -0600

Jim Dirkes's avatar

DesignBuilder does not use certain inputs, depending on the way you have configured HVAC calculations in the Model Options tab (the little wrench icon on the tool menu).

If the HVAC tab input is highlighted in green, the input is not used.

I'm not sure, from your description, where you are changing COP - so that's the best I can do at the moment.

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Asked: 2022-11-29 01:42:33 -0600

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Last updated: Nov 30 '22