Atila,

This is a very small home. It's not different than a 400 sf 2-BR apartment.
You'd probably be on the high range of typical loads encountered in such
spaces considering you've got 4 people in there (some appliances do scale,
others don't).

The easiest would be to get the schedules and load profile from OpenStudio
for example (MidRiseApartment, load value and profile derived from
(Hendron, 2007)).

You could also try to customize it further based on the NREL research on
the matter, which expands from several sources including RECS.

The report has some good information for your problem starting page 36,
listing a bunch of MELs (miscellaneous Electric loads) with tables of
consumption per appliances and average unit/household for approx 100 MELs.
The spreadsheet has the same information but allows you to see the hourly
profile as well as customize the appliances you do have (In particular on
tab Detailed "MEL" you can input in column D the which MELs and how many
you know you have. There's also a list of sources in there, including the
first one "Bob's judgment" :) )

NREL 2014 Building America House Simulation Protocols :
http://energy.gov/sites/prod/files/2014/03/f13/house_simulation_protocols_2014.pdf

Supporting spreadsheet (will save you some googling time if you try to
locate them...) : Building America Analysis Spreadsheet for New
Construction
http://energy.gov/eere/buildings/building-america-analysis-spreadsheets

(For reference that's where it started : Hendron, 2007: Building America
Research Benchmark http://www.nrel.gov/docs/fy08osti/42662.pdf )

Hope this help,
Julien

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Julien Marrec, EBCP, BPI MFBA
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2014-07-03 4:43 GMT+02:00 Jeff Haberl :

If you're simulating such a small house (~ 400 ft2), you need to scale appropriately the
occupancy loads from other studies. I wouldn't worry about differences in the hourly
profiles, because those would be vary all over the place anyway, but daily totals will
definitely differ from those of a typical single-family detached house. Lighting may scale
with floor area, but not occupant heat-gain, while appliance internal gains will be
somewhere in the middle (smaller appliances and probably fewer). When I was working at
LBNL, I used a bottoms-up method to derive an average internal load for houses by adding
up the type of appliance x daily heat gain x percent heat gain in space. The advantage of
such a method is that it allows you to scale back the size or number of appliances for the
house that you're modeling. That work was done back in the early 1980's, so it could use
a substantial upgrade, but IMHO the methodology is still valid. If anyone's interested,
send me an e-mail and I'll see if I can dig out and scan the relevant pages of the
Technical Support Document.

Joe

Joe Huang
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