Re: [EnergyPlus_Support] Residential Equipment Loads and Schedules

[Dru Crawley <dbcrawley@xxxxxxxxx>]

Mixing apples and oranges and old and new.

 

The RefBldgMidriseApartmentNew2004_Chicago.idf is a multifamily building and would likely have higher power density and different schedules from a single family residence.

 

The DOE Building America Research Benchmark by Hendron (2004) was updated in 2010 to become the NREL Building America House Simulation Protocols by Hendron and Engebrecht (2010). BEOpt web site (http://beopt.nrel.gov) says it incorporates the NREL Building America House Simulation Protocols.

 

If you're looking for single family data -- go for the NREL Building America House Simulation Protocols.

 

On Sun, Jul 7, 2013 at 9:10 PM, burin3 <burin3@xxxxxxxxx> wrote:

 

I am trying to simulate a benchmark single family house and having trouble finding authoritative advice on equipment loads and schedules for a single zone residence.

The EPlus residential example file (RefBldgMidriseApartmentNew2004_Chicago.idf) gives 5.38 W/m2 equipment power density with fractional time of day schedule that ranges from 38% at 5am to 100% at 9pm.

BEOpt (software that uses EPlus and is based on the DOE Building America Benchmark) gives individual power and schedule for large appliances and 2.46 W/m2 for miscl equipment with a very different fractional time of day schedule.  This one varies by month but January (for instance) ranges from 51% at 10am to 99% at 9pm.  The distribution of fractions is different from the EPlus example file.

Curiously, the DOE Building America Research Benchmark by Hendron (2004) shows a different equipment profile, from 27% at 4am to 59% at 7pm.  This one is derived from Huang and Gu 2002.  The paper gives annual equipment energy use for a few scenarios but no typical power densities.

Finally, the NREL Building America House Simulation Protocols by Hendron and Engebrecht (2010) describes yet another residential load profile that is modeled after research by Pratt et al. 1989.  This schedule valleys at 24% at 4am and peaks at 65% at 6pm.  This paper does not give typical equipment power.

The fractional utilization makes a huge difference in terms of both annual energy use and daily heat gain.  If anyone has any advice (and/or a sample equipment load and schedule), it would be much appreciated.

Thank you!

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