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OLS Field Name OLS Field Data
Main Title Model-based chiller energy tracking for performance assurance at a university building.
Author Piette, M. A. ; Carter, G. ; Meyers, S. ; Sezgen, O. ; Selkowoitz, S. ;
CORP Author USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States). ;Environmental Protection Agency, Washington, DC (United States).
Publisher 30 Sep 1997
Year Published 1997
Report Number LBNL-40781 ;CONF-9709154; AC03-76SF00098;
Stock Number DE98051526
Additional Subjects Air Conditioners ; Energy Consumption ; Computerized Simulation ; Energy Expenses ; Operating Cost ; Energy Efficiency ; Meetings ; EDB/320105 ; EDB/320106
Library Call Number Additional Info Location Last
NTIS  DE98051526 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 08/17/1999
Collation 17p
Abstract Buildings and their various subsystems often do not perform as well as intended at the design stage. Building energy performance suffers from insufficient documentation of design intent, inadequate building commissioning, and a lack of robust methods for short term and continuous performance tracking. This paper discusses how calibrated models can be used to track building systems and component performance from design, through commissioning, and into operations. Models of the chillers energy use and efficiency were developed and used to evaluate energy performance and control changes to minimize energy use. The example discussed is based on an actual university building. A detailed discussion of the extrapolation and associated uncertainty of using six months of data to develop annual energy use scenarios from various chiller models is included. An important lesson concerning the design is that there was significant oversizing of the chillers resulting in poor part load performance and over $3,000 year of annual energy cost increases. The oversizing is related to extremely high estimates of office equipment loads. The oversizing also causes frequent cycling of chillers, which shortens chiller life. Due to the lack of careful start-up procedures, it appears construction debris fouled one of the new chillers, resulting in about $5,200 year in energy increases. Additional comments on design and commissioning issues are included. The monitoring, modeling, and software development efforts were developed to demonstrate the value of collecting and organizing information regarding design, commissioning, and ongoing performance. This case study is part of a larger effort to examine methods and technologies to improve buildings performance and develop interoperable Building Life-Cycle Information Systems (BLISS).
Supplementary Notes Conference on cool sense national forum on integrated chiller retrofits.
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Category Codes 89B; 97B; 97J
NTIS Prices PC A03/MF A01
Document Type NT
Cataloging Source NTIS/MT
Control Number 910500880
Origin NTIS
Type CAT