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Unexpected results in energy consumption with HVAC-template ideal load air system

asked 2023-09-14 03:18:30 -0500

Moheete's avatar

updated 2023-09-14 09:29:15 -0500

I am analyzing the results of two idf files with ideal loads using hvac-template and hvac-detailed.

I am finding unexpected results. I am considering the original location (Buffalo, NY, USA), which has a winter-dominated climate. However, the ideal load for cooling (257.92 GJ) is 2.3 times larger than that for heating (111.28 GJ). On the other hand, for the idf with HVAC-detailed, the energy for heating (225.11 GJ) is much larger than that for cooling (70.95 GJ), which seems to be far more reasonable than the results for ideal loads.

I wonder what is happening and why??

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answered 2023-09-14 11:47:13 -0500

updated 2023-09-14 11:47:41 -0500

Perhaps your ideal air system is doing dehumidification? See the Dehumidification Control Type input for the HVACTemplate:Zone:IdealLoadsAirSystem object. As the documentation explains, "The selected dehumidification control type is always applied when the unit is in cooling mode."

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Asked: 2023-09-14 03:18:30 -0500

Seen: 63 times

Last updated: Sep 14 '23