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Comparison of ASHRAE Standard 90.1, 189.1 and IECC Codes for Large Office Buildings in Texas
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Date
2011
Journal Title
Journal ISSN
Volume Title
Publisher
Energy Systems Laboratory (http://esl.tamu.edu)
Texas A&M University (http://www.tamu.edu)
Texas A&M University (http://www.tamu.edu)
Abstract
Six energy codes were compared in terms of annual site and source energy consumption. This comparison includes ASHRAE Standard 90.1-1989, ASHRAE Standard 90.1-1999, ASHRAE Standard 90.1-2007, ASHRAE Standard 90.1-2010, IECC 2009 and ASHRAE 189.1-2009. The analysis was performed for three Texas counties: Harris (climate zone 2A), Tarrant (climate zone 3A) and Potter (climate zone
4B). Both annual site and source energy consumption were compared. ASHRAE Standard 90.1-1989 was considered as the base case.
ASHRAE Standard 90.1-1989 was considered as the base-case. When considering site energy consumption, ASHRAE Standard 90.1-1999 provides an improvement of 16.7%-18.6%. ASHRAE Standard 90.1-2004 provides an improvement of
22.3%-32.6%, ASHRAE Standard 90.1-2007 provides an improvement of 28.1%-33.9%, IECC
2009 provides an improvement of 27.4%-35.3%, ASHRAE Standard 90.1-2010 provides an improvement of 42.1%-47.7%, and ASHRAE 189.1-
2009 provides an improvement of 46.9%-54.9%
above the ASHRAE Standard 90.1-1989 base-case.
When considering source energy consumption, ASHRAE Standard 90.1-1999 provides an improvement of 14.5%- 15.0%, ASHRAE Standard
90.1-2004 provides an improvement of 21.6%-
27.2%, ASHRAE Standard 90.1-2007 provides an improvement of 23.5%-28.4%, and IECC 2009 provides an improvement of 23.4%-30.5%. ASHRAE Standard 90.1-2010 provides an improvement of
41.8%-45.7% and ASHRAE 189.1-2009 provides an improvement of 44.5%-51.8% above the ASHRAE Standard 90.1-1989 base-case.