Abstract In real engineering of solar thermal applications, it needs considerable effort to determine the incidence angle modifier (IAM) of flat plate solar collectors, according to the test standards (BS EN ISO 9806, 2017; ASHRAE 93-2010, 2014). And the available method in the test standards is usually inapplicable to measure thermal performance of installed solar collectors with dust deposition effect in service. A quick measurement method is therefore presented to identify the IAM of flat plate solar collectors with less effort using a spectroradiometer. The quick method developed was validated with optical tests of a solar panel under the conditions of different incidence angles. It is inferred that the method not only helps to determine the IAM of flat plate solar collectors quickly without needing to run the collectors by energy power input, but also provides a pathway for assessing dust deposition effect on the thermal performance of installed flat plate solar collectors in service, as well as for determining the optical property attenuation of solar collectors in the long-term running.

中文翻译：

---

一种利用分光辐射计快速测定平板太阳能集热器入射角修正量的方法

摘要 在太阳能热应用的实际工程中，根据测试标准（BS EN ISO 9806, 2017; ASHRAE 93-2010, 2014）确定平板太阳能集热器的入射角调节器（IAM）需要付出相当大的努力。并且测试标准中的现有方法通常不适用于测量已安装的太阳能集热器在使用中的粉尘沉积效应的热性能。因此，提出了一种快速测量方法，可以使用分光辐射计轻松识别平板太阳能集热器的 IAM。开发的快速方法通过太阳能电池板在不同入射角条件下的光学测试得到验证。推断该方法不仅有助于快速确定平板太阳能集热器的IAM，而无需通过能量输入来运行集热器，