[BLDG-SIM] DOE 2.1E validation

[Varkie Thomas]

ASHRAE STD90 is now being adopted into building codes.  It is no longer
just a guideline.  In legal disputes concerning large commercial
building projects, all building code violations might be brought up
including issues that are unrelated to the dispute.  Energy code
violation might result in higher utility bills for the building owner
but there is no risk to life or limb.

The prescriptive compliance method and the ComCheck-EZ program are clear
and straightforward to follow and use.  STD90 User Manual explains the
prescriptive method process with examples.  In my opinion the "intent"
of the Energy Cost Budget (ECB) method which also requires utility rate
analysis can be explained with case studies of different types of
building projects in different climatic locations using different types
of local utility rates.

The bottom line results from energy simulation programs of various
options should be looked at with a weighted point system evaluation
matrix that considers other factors such as first & maintenance costs,
reliability of equipment, local skilled construction and maintenance
staff and replacement parts.  The most reliable, dependable and
cost-effective option over a reasonable life-cycle period (which might
turn out to be also the most energy efficient) is the one that usually
gets designed and built.  

A published library of case studies of energy efficient design of
different building types would also be very useful in education.  The
case studies would consist of design criteria, operating schedules,
schematic-simplified layouts of floors, systems and plant, riser
diagrams, and equipment schedules. The purpose would be to identify and
explain the components of the building that affect energy usage and
discuss the pros and cons of various ECMs.  I have started creating such
modified and simplified case studies based on SOM projects for graduate
courses at the Illinois Institute of Technology (IIT).

 DOE2.1E program is still the program in use in this office (SOM) to
show compliance with ASHRAE STD90 and the local energy codes that have
been introduced recently.  The DOE2 and all programs based on it are not
suitable for building design loads analysis.  Is there any interest in
establishing an informal group to discuss the merits of the various
energy simulation programs available today and applying them to various
types of building projects to show code compliance?  This could be done
by exchanging email addresses.

Varkie Thomas
Skidmore, Owings & Merrill (SOM)



 


-----Original Message-----
From: Peter Simmonds [mailto:peter.simmonds at ibece.net] 
Sent: Wednesday, March 31, 2004 7:03 PM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] DOE 2.1E validation
Importance: High

Can anyone help me in providing any information regarding ASHRAE
approving DOE 2.1 as an energy simulation tool?
I know this might sound strange, even many years after the predictor
shootout and knowing that 90.1 uses DOE 2 for most of the energy
simulation, but is it written in blood anywhere.


Peter Simmonds, Ph.D.
IBE Consulting Engineers
5910 Lemona Ave. 3rd Floor
Van Nuys, CA 91411

tel: 818-947-0000 #246
fax:818-947-0047
cell: 818-219-1284

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