Long-term glazing performance

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Description

A survey of glazing materials is presented and initial (nondegraded) properties are compared. Weathering characteristics are discussed in terms of mechanisms and their effects upon candidate glazings. Examples of failure modes are given for various commercially available materials. A specific process, optical degradation, was studied in detail to determine how loss of solar transmission affects the thermal performance of flat-plate solar energy collection systems. Computer simulations of singly and doubly glazed collectors having cover plates of various commercially available transparent materials were made for one-week time periods using Phoenix, Ariz., insolation and meteorological data. Optical degradation was modeled by systematically ... continued below

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Pages: 12

Creation Information

Jorgensen, G.J. January 1, 1979.

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Description

A survey of glazing materials is presented and initial (nondegraded) properties are compared. Weathering characteristics are discussed in terms of mechanisms and their effects upon candidate glazings. Examples of failure modes are given for various commercially available materials. A specific process, optical degradation, was studied in detail to determine how loss of solar transmission affects the thermal performance of flat-plate solar energy collection systems. Computer simulations of singly and doubly glazed collectors having cover plates of various commercially available transparent materials were made for one-week time periods using Phoenix, Ariz., insolation and meteorological data. Optical degradation was modeled by systematically decreasing the specified values of solar transmittances of the plastic cover plates under consideration. Energy collection efficiencies corresponding to each decrement of transmittance were normalized to that of nondegraded glass to allow comparisons both with a standard and among the different plastics. This provides a measure of the relative usefulness of various candidate polymeric glazing materials when realistic rates of optical degradation are known.

Physical Description

Pages: 12

Notes

Dep. NTIS, PC A02/MF A01.

Source

  • Solar glazing: 1979 topical conference, Pomona, NJ, USA, 22 Jun 1979

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  • Report No.: SERI/TP-31-193
  • Report No.: CONF-790667-1
  • Grant Number: EG-77-C-01-4042
  • Office of Scientific & Technical Information Report Number: 6171204
  • Archival Resource Key: ark:/67531/metadc1107020

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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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Creation Date

  • January 1, 1979

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

Description Last Updated

  • June 8, 2018, 9:33 p.m.

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Jorgensen, G.J. Long-term glazing performance, article, January 1, 1979; Golden, Colorado. (https://digital.library.unt.edu/ark:/67531/metadc1107020/: accessed April 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.