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Edney Building (TVA)
16 Eleventh Street
Chattanooga, TN 37402
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The Edney building is an 11 story, 93,000 square foot office building built in 1959.  In recent years it has been upgraded to improve its energy efficiency.  It is heated and cooled with a hydronic loop heat pump system.  This system was originally designed with a 50 horsepower pump and one 5 horsepower pump circulating a 70/30% water/glycol heat transfer solution, in a closed loop, to 59 individual heat pumps.  This system was specified since many areas in the building require heating and cooling 24 hours a day, seven days a week.  A TVA employee, Mr. Norman Bookout recommended the use of in-line fractional horsepower pumps in the loop instead of the 50 horsepower and the 5 horsepower pumps.  A test was conducted on the heat pumps in the critical areas of the building and the in-line pumps were found to handle the load with no problems.  As a result, the entire building was retrofitted with these smaller pumps.  The 55 horsepower pumps were replaced with 46 in-line pumps, totaling 8.2 horsepower.  Unlike the old pumps, which had to run continuously, the in-line pumps cycle on and off with the compressors of the individual heat pumps that they serve plus they do not add significant amounts of heat to the building.  The new pumps also save maintenance dollars because they are considered "maintenance free" for 10 years.  Other HVAC modifications included the installation of variable frequency drives on the cooling tower to provide better control, and an energy management system to control the HVAC operation and building lighting.

The Edney Building also had other energy management and related environmental improvements implemented including: occupancy sensors to cut off lights when not needed, the installation of energy efficient lighting and ballasts, and recycling to reduce waste generation.

Communications:

Unavailable

Testimonial:

Unavailable


Please note: Narrative information in this profile has been provided by Tennessee Valley Authority or a representative of this facility. Other building information was verified and submitted to EPA at the time of application. Building energy performance, operating characteristics, and ownership/management may be subject to change over time.

Building Owner:*
Tennessee Valley Authority

Property Manager:*
N/A

Year(s) Labeled (Rating):
2001 (78)

Facility Type: Office

Total Floorspace: 103460 sf

Year Constructed: 1969

Contract Type: None

Technologies Used:
Unavailable

For More Info:
Stephen Brothers
Agency Energy Management Coordinator
Chattanooga, TN 37402-2801
423-751-7369
slbrothers@tva.gov