ASTM-E881:2009 Edition

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E881-92(2009) Standard Practice for Exposure of Solar Collector Cover Materials to Natural Weathering Under Conditions Simulating Stagnation Mode

Published By	Publication Date	Number of Pages
ASTM	2009	8

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Category: ASTM

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Description

ASTM E881-92-Reapproved2009

Historical Standard: Standard Practice for Exposure of Solar Collector Cover Materials to Natural Weathering Under Conditions Simulating Stagnation Mode

ASTM E881

Scope

1.1 This practice covers a procedure for the exposure of solar collector cover materials to the natural weather environment at elevated temperatures that approximate stagnation conditions in solar collectors having a combined back and edge loss coefficient of less than 1.5 W/(m² · °C).

1.2 This practice is suitable for exposure of both glass and plastic solar collector cover materials. Provisions are made for exposure of single and double cover assemblies to accommodate the need for exposure of both inner and outer solar collector cover materials.

1.3 This practice does not apply to cover materials for evacuated collectors, photovoltaic cells, flat-plate collectors having a combined back and edge loss coefficient greater than 1.5 W/(m² ·° C), or flat-plate collectors whose design incorporates means for limiting temperatures during stagnation.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

natural weathering; solar collector covers; stagnation; variable-angle exposure; weathering; Solar collectors; Stagnation conditions; Weathering (solar devices)

ICS Code

ICS Number Code 27.160 (Solar energy engineering)

DOI: 10.1520/E0881-92R09

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Significance and Use
2	Weathering Box Test Fixture TABLE 1
3	FIG. 1 FIG. 2
4	Natural Weathering Exposure Report TABLE 2
5	Precision and Bias Keywords X1. CALCULATION OF EXPOSURE TEST FIXTURE HEAT LOSSES X1.1 Scope X1.2 Procedure
7	X2. DETERMINATION OF VARIABLE-ANGLE EXPOSURE SCHEDULE X2.1 TABLE X2.1
8	TABLE X2.2

Additional information

Standard Title	E881-92(2009) Standard Practice for Exposure of Solar Collector Cover Materials to Natural Weathering Under Conditions Simulating Stagnation Mode
Published Code	ASTM
Publication Date	2009
Pages Count	8