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ASTM E903標準名稱
ASTM E903-20 Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres
ASTM E903-20 用積分球測定太陽吸收率、反射率和材料透射率的標準試驗方法
ASTM E903標準適用范圍和簡述
1.1 本試驗方法包括使用配有積分球的分光光度計測量材料的光譜吸收率、反射率和透射率。
1.2 規定了根據測量的光譜值計算太陽加權特性的方法。
1.3 本試驗方法適用于具有鏡面反射和漫反射的材料光學性能。
1.4 本試驗方法為 適用于涂有光學涂層的材料,并特別考慮對被測材料紋理的影響。
1.5 不均勻、有紋理、有圖案或有波紋的透射板材料需要特別考慮本試驗方法的適用性。測試方法1084可能更適合于測定體光學性質對于紋理或不均勻材料。
1.6 對于均質材料,本試驗方法優于試驗方法1084。
1.7 本試驗方法指使用標準參考太陽光譜分布的應用,但可以使用替代選擇的光譜進行應用,只要太陽光譜分布的來源和細節以及報告加權。
1.8 本標準不旨在解決與其使用相關的所有安全問題(如有)。本標準的使用者有責任在使用前制定適當的安全、健康和環境實踐,并確定監管限制的適用性。
1.9 本國際標準是根據國際公認的標準化原則制定的 根據世界貿易組織技術性貿易壁壘(TBT)委員會發布的關于制定國際標準、指南和建議的原則的決定。
1.1 This test method covers the measurement of spectral absorptance, reflectance, and transmittance of materials using spectrophotometers equipped with integrating spheres.
1.2 Methods of computing solar weighted properties from the measured spectral values are specified.
1.3 This test method is applicable to materials having both specular and diffuse optical properties.
1.4 This test method is applicable to material with applied optical coatings with special consideration for the impact on the textures of the material under test.
1.5 Transmitting sheet materials that are inhomogeneous, textured, patterned, or corrugated require special considerations with respect to the applicability of this test method. Test MethodE1084may be more appropriate to determine the bulk optical properties of textured or inhomogeneous materials.
1.6 For homogeneous materials this test method is preferred over Test MethodE1084.
1.7 This test method refers to applications using standard reference solar spectral distributions but may be applied using alternative selected spectra as long as the source and details of the solar spectral distribution and weighting are reported.
1.8 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM E1980及ASTM E903標準都關注于太陽反射率,南京睿督提供ASTM E1980太陽反及ASTM E903太陽反射比測試,具體內容可以詳細南京睿督公司 025-86583475。
ASTM E1980標準名稱
ASTM E1980 Standard Practice for Calculating Solar Reflectance Index of Horizontal and Low-Sloped Opaque Surfaces.
ASTM E1980 水平和低傾斜不傳熱表面太陽光反射系數的計算規程。
太陽能反射率和熱輻射系數是影響地表和近地表環境空氣溫度的重要因素。太陽反射率低的地表吸收大部分進入的太陽能。吸收的能量的一部分被導入地面和建筑物,與大氣對流(導致更高的氣溫),并且一部分輻射到天空。對于等效條件,表面的發射率越低,其穩態溫度越高。
具有低發射率的表面不能有效地輻射到天空并因此變得熱。確定太陽反射率和熱發射率,并且隨后計算相對于黑色和白色參考溫度(定義為太陽能反射率指數,SRI),表面的溫度可以幫助設計者和消費者選擇合適的材料以使他們的建筑物和社區節能。
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