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  • ASTM
    E744-85(1996) Standard Practice for Evaluating Solar Absorptive Materials for Thermal Applications (Withdrawn 2005)
    Edition: 1996
    $82.37
    Unlimited Users per year

Description of ASTM-E744 1996

ASTM E744-85-Reapproved1996

Historical Standard: Standard Practice for Evaluating Solar Absorptive Materials for Thermal Applications (Withdrawn 2005)




ASTM E744

Scope

1.1 This practice covers a testing methodology for evaluating absorptive materials used in flat plate or concentrating collectors, with concentrating ratios not to exceed five, for solar thermal applications. This practice is not intended to be used for the evaluation of absorptive surfaces that are ( ) used in direct contact with, or suspended in, a heat-transfer liquid, (that is, trickle collectors, direct absorption fluids, etc.); ( ) used in evacuated collectors; or ( ) used in collectors without cover plate(s).

1.2 Test methods included in this practice are property measurement tests and aging tests. Property measurement tests provide for the determination of various properties of absorptive materials, for example, absorptance, emittance, and appearance. Aging tests provide for exposure of absorptive materials to environments that may induce changes in the properties of test specimens. Measuring properties before and after an aging test provides a means of determining the effect of the exposure.

1.3 The assumption is made that solar radiation, elevated temperature, temperature cycles, and moisture are the primary factors that cause degradation of absorptive materials. Aging tests are described for exposure of specimens to these factors.

Note 1-For some geographic locations, other factors, such as salt spray and dust erosion, may be important. They are not evaluated by this practice.

1.4 The values stated in SI units are to be regarded as the standard.

1.5 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

Solar heating/cooling systems; evaluating solar absorptive materials (for thermal applications),; practice,; Thermal analysis (TA); solar absorptive materials, practice,;Order Form


ICS Code

ICS Number Code 27.160 (Solar energy engineering)


DOI: 10.1520/E0744-85R96

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