Standard Practice for Evaluating Solar Absorptive Materials for Thermal Applications

Importancia y uso:

4.1 The methods in this practice are intended to aid in the assessment of long-term performance by comparative testing of absorptive materials. The results of the methods, however, have not been shown to correlate to actual in-service performance.

4.2 The testing methodology in this practice provides two testing methods, in accordance with Fig. 1.

FIG. 1 Outline of Test Method Options

4.2.1 Method A, which aims at decreasing the time required for evaluation, uses a series of individual tests to simulate various exposure conditions.

4.2.2 Method B utilizes a single test of actual outdoor exposure under conditions simulating thermal stagnation.

4.2.3 Equivalency of the two methods has not yet been established.

Subcomité:

E44.20

Volúmen:

12.02

Número ICS:

27.160 (Solar energy engineering)

Palabras clave:

absorptance; aging; emittance; laboratory exposure; outdoor weathering; solar collectors; thermal cycling; thermal stagnation; xenon arc;