State-of-the-art software for window energy-efficiency rating and labeling

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Description

Measuring the thermal performance of windows in typical residential buildings is an expensive proposition. Not only is laboratory testing expensive, but each window manufacturer typically offers hundreds of individual products, each of which has different thermal performance properties. With over a thousand window manufacturers nationally, a testing-based rating system would be prohibitively expensive to the industry and to consumers. Beginning in the early 1990s, simulation software began to be used as part of a national program for rating window U-values. The rating program has since been expanded to include Solar Hear Gain Coefficients and is now being extended to annual ... continued below

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6 p.

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Arasteh, D.; Finlayson, E.; Huang, J.; Mitchell, R.; Rubin, M. & Huizenga, C. July 1, 1998.

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Description

Measuring the thermal performance of windows in typical residential buildings is an expensive proposition. Not only is laboratory testing expensive, but each window manufacturer typically offers hundreds of individual products, each of which has different thermal performance properties. With over a thousand window manufacturers nationally, a testing-based rating system would be prohibitively expensive to the industry and to consumers. Beginning in the early 1990s, simulation software began to be used as part of a national program for rating window U-values. The rating program has since been expanded to include Solar Hear Gain Coefficients and is now being extended to annual energy performance. This paper describes four software packages available to the public from Lawrence Berkeley National Laboratory (LBNL). These software packages are used to evaluate window thermal performance: RESFEN (for evaluating annual energy costs), WINDOW (for calculating a product`s thermal performance properties), THERM (a preprocessor for WINDOW that determines two-dimensional heat-transfer effects), and Optics (a preprocessor for WINDOW`s glass database). Software not only offers a less expensive means than testing to evaluate window performance, it can also be used during the design process to help manufacturers produce windows that will meet target specifications. In addition, software can show small improvements in window performance that might not be detected in actual testing because of large uncertainties in test procedures.

Physical Description

6 p.

Notes

OSTI as DE98059386

Source

  • 1998 ACEEE summer study on energy efficiency in buildings, Pacific Grove, CA (United States), 23-28 Aug 1998

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  • Other: DE98059386
  • Report No.: LBNL--42151
  • Report No.: TA--378;CONF-980815--
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 296888
  • Archival Resource Key: ark:/67531/metadc685812

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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

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Jan. 19, 2018, 1:58 p.m.

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Arasteh, D.; Finlayson, E.; Huang, J.; Mitchell, R.; Rubin, M. & Huizenga, C. State-of-the-art software for window energy-efficiency rating and labeling, article, July 1, 1998; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc685812/: accessed April 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.