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DOE Reference building HVAC

asked 2015-07-30 16:04:40 -0500

FrontierAssoc104's avatar

updated 2015-07-30 17:03:13 -0500

MatthewSteen's avatar

I am looking through DOE reference building IDFs. Using the Notepad++ comparison tool, I am finding differences between reference building HVAC equipment characteristics (e.g. DX coil Rated COP or Package Fan Efficiency). I know that simulations preform a sizing run first and then the actual simulation, so I am wondering why these parameters may differ? I am comparing the same building types but for different climate zones, so it may be solely weather based. However, I am wondering if there could be another rationale. Why would these parameters differ before the sizing run occurs?

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answered 2015-07-30 17:15:19 -0500

ericringold's avatar

updated 2015-07-30 17:15:51 -0500

Equipment efficiencies in the reference building models are determined according to energy standards, and are based on equipment size. Likely the differences you're seeing is due to the previously auto-sized equipment capacities in different climate zones yielding a different equipment efficiency as specified in the energy standard.

The efficiencies for different systems and capacity ranges is documented in the Commercial Reference Buildings report, starting on page 35.

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Asked: 2015-07-30 16:04:40 -0500

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Last updated: Jul 30 '15

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