Electrical energy and demand savings from a geothermal heat pump energy savings performance contract at Ft. Polk, LA

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At Fort Polk, LA the space conditioning systems of an entire city (4,003 military family housing units) have been converted to geothermal heat pumps (GHP) under an energy savings performance contract. At the same time, other efficiency measures such as compact fluorescent lights (CFLs), low-flow hot water outlets, and attic insulation were installed. Pre- and post-retrofit data were taken at 15-minute intervals on energy flows through the electrical distribution feeders that serve the family housing areas of the post. 15-minute interval data was also taken on energy use from a sample of the residences. This paper summarizes the electrical energy ... continued below

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36 p.

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Shonder, J.A. & Hughes, P.J. June 1, 1997.

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At Fort Polk, LA the space conditioning systems of an entire city (4,003 military family housing units) have been converted to geothermal heat pumps (GHP) under an energy savings performance contract. At the same time, other efficiency measures such as compact fluorescent lights (CFLs), low-flow hot water outlets, and attic insulation were installed. Pre- and post-retrofit data were taken at 15-minute intervals on energy flows through the electrical distribution feeders that serve the family housing areas of the post. 15-minute interval data was also taken on energy use from a sample of the residences. This paper summarizes the electrical energy and demand savings observed in this data. Analysis of feeder-level data shows that for a typical year, the project will result in a 25.6 million kWh savings in electrical energy use, or 32.4% of the pre-retrofit electrical consumption in family housing. Results from analysis of building-level data compare well with this figure. Analysis of feeder-level data also shows that the project has resulted in a reduction of peak electrical demand of 6,541 kW, which is 39.6% of the pre-retrofit peak electrical demand. In addition to these electrical savings, the facility is also saving an estimated 260,000 therms per year of natural gas. It should be noted that the energy savings presented in this document are the apparent energy savings observed in the monitored data, and are not to be confused with the contracted energy savings used as the basis for payments. To determine the contracted energy savings, the apparent energy savings may require adjustments for such things as changes in indoor temperature performance criteria, additions of ceiling fans, and other factors.

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36 p.

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OSTI as DE98005584

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  • American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) annual meeting, Boston, MA (United States), 28 Jun - 2 Jul 1997

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  • Other: DE98005584
  • Report No.: ORNL/CP--92721
  • Report No.: CONF-970668--
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/658213 | External Link
  • Office of Scientific & Technical Information Report Number: 658213
  • Archival Resource Key: ark:/67531/metadc709382

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  • June 1, 1997

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  • Sept. 12, 2015, 6:31 a.m.

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  • Jan. 19, 2016, 1:03 p.m.

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Shonder, J.A. & Hughes, P.J. Electrical energy and demand savings from a geothermal heat pump energy savings performance contract at Ft. Polk, LA, report, June 1, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc709382/: accessed October 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.