Abstract/Details

Energy efficiency enhancements to a low energy high performance building


2008 2008

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Abstract (summary)

This report discusses energy efficiency enhancements made to a low energy, high performance office building. The building studied is the Iowa Association of Municipal Utilities headquarters located in Ankeny, Iowa, just north of Des Moines. Monitoring the energy use of the building for over six years has revealed that it has an average annual site energy use of 29,300 Btu/ft2. This is 68% less energy than that used by the average U.S. office building and 74% less energy than the average office building in climate zone 2, the location of Ankeny.

Three areas of energy use were chosen for improvement: the ground source heat pump system's circulating pump, the energy recovery ventilator's defrost heater, and general office equipment (computers, refrigerators, coffee pot, etc.) during periods when the building is unoccupied. Before the improvements, the three items contributed to 38% of the building's annual energy use. The table below summarizes the energy use of each item before improvements were made, and the savings resulting from the improvements. The improvements have the potential of saving up to 27% of the building's annual energy use. The circulating pump's energy savings were achieved by switching it from a constant speed pump to a variable speed pump by equipping it with a variable frequency drive and installing shutoff valves on the heat pumps. Energy savings for the defrost heater were realized by decreasing its set point from an unreasonable 46°F to a recommended 5°F. The savings for the general equipment can be achieved if employees turn off all unnecessary equipment when the building is unoccupied.

Indexing (details)


Subject
Mechanical engineering;
Energy
Classification
0548: Mechanical engineering
0791: Energy
Identifier / keyword
Applied sciences; Green building; High-performance building; Low-energy building; Sustainable; Variable speed pumping
Title
Energy efficiency enhancements to a low energy high performance building
Author
Logan, Joel Clifton
Number of pages
210
Publication year
2008
Degree date
2008
School code
0097
Source
MAI 46/05M, Masters Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780549540748
Advisor
Pate, Michael B.; Nelson, Ron M.
Committee member
Mann, J. Adin
University/institution
Iowa State University
Department
Mechanical Engineering
University location
United States -- Iowa
Degree
M.S.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
1453054
ProQuest document ID
304613363
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304613363
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