ASTM-E434 Standard Test Method for Calorimetric Determination of Hemispherical Emittance and the Ratio of Solar Absorptance to Hemispherical Emittance Using Solar Simulation

ASTM-E434 - 2010 R15 EDITION - CURRENT
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This test method covers measurement techniques for calorimetrically determining the ratio of solar absorptance to hemispherical emittance using a steady-state method, and for calorimetrically determining the total hemispherical emittance using a transient technique. The main elements of the apparatus include a vacuum system, a cold shroud within the vacuum chamber, instrumentation for temperature measurement, and a solar simulator. Any type of coating may be tested by this test method provided its structure remains stable in vacuum over the temperature range of interest. The substrate shall be machined from flat stock and to a size proportioned to the working area of the chamber.

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Scope

1.1 This test method covers measurement techniques for calorimetrically determining the ratio of solar absorptance to hemispherical emittance using a steady-state method, and for calorimetrically determining the total hemispherical emittance using a transient technique.

1.2 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

calorimetry; emittance; infrared emittance; material radiative property; radiative heat transfer; solar absorptance; spacecraft thermal control; spectral normal emittance; thermal radiation ;; ICS Number Code 27.160 (Solar energy engineering)

To find similar documents by ASTM Volume:

15.03 (Space Simulation; Aerospace and Aircraft; Composite Materials)

To find similar documents by classification:

27.160 (Solar energy engineering Including photovoltaic energy systems)

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Document Number

ASTM-E434-10(2015)

Revision Level

2010 R15 EDITION

Status

Current

Modification Type

Reapproval

Publication Date

Nov. 1, 2015

Document Type

Test Method

Page Count

6 pages

Committee Number

E21.04