Overall Rating Silver - expired
Overall Score 49.13
Liaison Michael Kensler
Submission Date Jan. 15, 2013
Executive Letter Download

STARS v1.2

Auburn University
IN-4: Innovation 4

Status Score Responsible Party
Complete 1.00 / 1.00 Ken Martin
Energy Engineer
Utilities and Energy Management, Facilities Management
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A brief description of the innovative policy, practice, program, or outcome:

The majority of the buildings on Auburn University's main campus are heated and cooled through a District Energy loop with a series of natural gas boilers that generate the hot water for the system. Two boilers carry the hot water load for the main campus for the majority of the year. On the two primary boilers, Auburn University partnered with the campus natural gas provider (ALAGASCO) to install two Hawk ICS controllers in 2011.

The Hawk ICS is a control device that automatically trims the boiler in order to maintain a high efficiency no matter how the campus hot water load fluctuates. It balances the fuel to air ratio for optimum combustion efficiency. Our boilers before the retrofit had mechanical linkages that were set up and tuned at startup in order to have the boilers operate as efficiently as possible. This was a good start but did not account for the load swings.

The result of installing the Hawk ICS controllers was a 5% increase in efficiency for each boiler (from ~82% - 87%). This is a substantial savings in fuel cost as well as a reduction in emissions from these boilers.

A letter of affirmation from an individual with relevant expertise:
The website URL where information about the innovation is available:

Data source(s) and notes about the submission:

The information presented here is self-reported. While AASHE staff review portions of all STARS reports and institutions are welcome to seek additional forms of review, the data in STARS reports are not verified by AASHE. If you believe any of this information is erroneous or inconsistent with credit criteria, please review the process for inquiring about the information reported by an institution or simply email your inquiry to stars@aashe.org.