[Bldg-sim] comparing insulated core masonry block with stick built
Murray Milne
milne at ucla.edu
Fri Jan 18 16:31:23 PST 2008
HEED (Home Energy Efficient Design) shows you graphically a thermal
comparison of up to nine different building designs, and allows you
to input custom values for U-factor, time lag, and decrement factor
of all opaque surfaces. It calculates a whole-building hourly heat
balance for 8760 hours per year. It accounts for thermal mass within
the envelope and also inside the insulated envelope. It has a number
of typical wall assemblies, including the two you mentioned, but if
you want to calculate a custom assembly use OPAQUE. You can load an
EPW weather file for you location. Both programs are available at no
cost (along with a link to the EPW files) on
www.aud.ucla.edu/energy-design-tools.
Murray Milne
Research Professor, UCLA
>
> On Jan 17, 2008 2:57 PM, Christian Stalberg <
> cstalberg at southern-energy.com <mailto:cstalberg at southern-energy.com>>
> wrote:
>
> I'm doing a modeling comparison in REM/Rate of two identical
> houses except one has 8" insulated core masonry block walls
> whereas the second has 4" wood stud insulated walls. Both walls
> end up having comparable U values. REM/Rate shows negligible
> difference in energy usage. I am suspicious that REM/Rate does not
> model the thermal bridging and mass features very well. Would I be
> better served performing this comparison in DOE-2 or would the
> results not be that much different?
>
Murray
Milne Research
Professor
UCLA, Department of Architecture and Urban Design, Los Angeles, 90095
UCLA Office Voice:
(310)206-7021 Fax: (310)825-8959
Malibu Office Voice: (310)454-7328 E-mail:
milne at ucla.edu
All our ENERGY DESIGN TOOLS software can be downloaded free from:
http://www.aud.ucla.edu/energy-design-tools
Please try HEED, Home Energy Efficient Design, and give us your thoughts:
http://www.aud.ucla.edu/heed
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