ASHRAE chiller efficiency improvements proposed

ANSI/ASHRAE/IES Standard 90.1-2010 addendum ch is open for public review.

December 13, 2012

A proposed addendum to ANSI/ASHRAE/IES Standard 90.1-2010, Energy Standard for Buildings Except Low-Rise Residential Buildings, changes the requirements for air and water cooled chillers as defined in section 6.4.2.1 and the efficiency requirements listed in table 6.8.1C. This change is a continuation of the efficiency improvements that were implemented in 2010 by further improving the efficiency requirements, according to Dick Lord, a member of the committee who developed the proposal through a working team of the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) chiller section.

Addendum ch is open for public review until Jan. 14, 2013. For more information, visit ASHRAE’s public reviews page.

In 2010, a Path B was added to the standard for part load intensive water cooled chillers.  Proposed addendum ch would expand Path B by adding requirements to include air cooled chillers.  Also as part of this change, efforts were made to bring the efficiency requirements for water cooled positive displacement and centrifugal chillers together while considering the available technology, and to chillers to be applied at other application conditions where one technology may better suited than the other. If approved, the new efficiency requirements would go into effect on Jan. 1, 2015.