Measuring advances in HVAC distribution system designs

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Substantial commercial building energy savings have been achieved by improving the performance of the HVAC distribution system. The energy savings result from distribution system design improvements, advanced control capabilities, and use of variable-speed motors. Yet, much of the commercial building stock remains equipped with inefficient systems. Contributing to this is the absence of a definition for distribution system efficiency as well as the analysis methods for quantifying performance. This research investigates the application of performance indices to assess design advancements in commercial building thermal distribution systems. The index definitions are based on a first and second law of thermodynamics analysis ... continued below

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18 p.

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Franconi, Ellen July 1, 1998.

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Description

Substantial commercial building energy savings have been achieved by improving the performance of the HVAC distribution system. The energy savings result from distribution system design improvements, advanced control capabilities, and use of variable-speed motors. Yet, much of the commercial building stock remains equipped with inefficient systems. Contributing to this is the absence of a definition for distribution system efficiency as well as the analysis methods for quantifying performance. This research investigates the application of performance indices to assess design advancements in commercial building thermal distribution systems. The index definitions are based on a first and second law of thermodynamics analysis of the system. The second law or availability analysis enables the determination of the true efficiency of the system. Availability analysis is a convenient way to make system efficiency comparisons since performance is evaluated relative to an ideal process. A TRNSYS simulation model is developed to analyze the performance of two distribution system types, a constant air volume system and a variable air volume system, that serve one floor of a large office building. Performance indices are calculated using the simulation results to compare the performance of the two systems types in several locations. Changes in index values are compared to changes in plant energy, costs, and carbon emissions to explore the ability of the indices to estimate these quantities.

Physical Description

18 p.

Notes

OSTI as DE00760311

Medium: P; Size: 18 pages

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  • 1998 ACEEE Summer Study on Energy Efficiency in Buildings, Pacific Grove, CA (US), 08/23/1998--08/28/1998

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  • Report No.: LBNL--43188
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 760311
  • Archival Resource Key: ark:/67531/metadc723048

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • July 1, 1998

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  • Sept. 29, 2015, 5:31 a.m.

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  • April 7, 2017, 4:09 p.m.

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Franconi, Ellen. Measuring advances in HVAC distribution system designs, article, July 1, 1998; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc723048/: accessed August 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.