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Assessment of the impact of meteorological conditions on pyrheliometer calibration

机译：评估气象条件对日射仪校准的影响

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摘要

Pyrheliometer calibration must be done following strict procedures in order to ensure the required robustness and accuracy. These procedures are described in the ISO 9059:1990 and ASTM E 816 - 15 international standards. However, their application requires information that may not always be available or may be subjective, inaccurate or incomplete, as for example, the determination of "percent of cloud coverage" or "the existence of clouds 15 around the Sun". The irradiance measurements made by the reference and test instruments involved should also be collected over wide periods after, close to and before solar noon, which might not always be the case depending on the weather conditions during calibration. When those data are not available, the standard cannot be applied properly, and the experts have to decide which data can be used for the calibration. In this study, the abovementioned two main standards for pyrheliometer calibration were thoroughly reviewed, and a harmonized protocol is proposed that uses only the main data recorded. Nineteen field pyrheliometers were calibrated to verify the proposed procedure, and the results show its robustness. After calibration, we analyzed the variability in the calibration constant and the influence of some experimental conditions on the calibration results. As in previous references, the results show that variations in solar elevation and wind speed during the day still influenced the calibration constants of most of the test devices. On the contrary, neither the angle between the wind direction and the solar azimuth nor Linke turbidity seemed to influence the calibration constants calculated. The influence of the Linke turbidity is low as the viewing geometry of all involved pyrheliometers is very similar to each other and as low turbidity prevailed. The correlation between the solar elevation and the wind speed was analyzed and calibration constants were found to vary linearly with solar elevation and wind speed, respectively. Pyrheliometer calibration measurement testing was carried out in Summer 2014 at the Plataforma Solar de Almeria (PSA) in the context of the Solar Facilities for the European Research Area 2 Project (SFERA2).
机译：为了确保所需的坚固性和准确性，必须遵循严格的程序进行高温计校准。这些程序在ISO 9059：1990和ASTM E 816-15国际标准中进行了描述。但是，它们的应用要求信息可能并不总是可用，或者可能是主观的，不准确的或不完整的信息，例如确定“云覆盖百分比”或“太阳周围云15的存在”。由所涉及的参考仪器和测试仪器进行的辐照度测量也应在太阳正午之后，接近太阳正午之前和太阳正午之前的较宽范围内收集，根据校准过程中的天气条件，情况并非总是如此。当这些数据不可用时，该标准将无法正确应用，并且专家必须决定可以将哪些数据用于校准。在这项研究中，对上述两个用于日射强度计校准的主要标准进行了全面回顾，并提出了仅使用记录的主要数据的统一协议。校准了19个现场高温计，以验证所提出的程序，结果表明了该程序的鲁棒性。校准后，我们​​分析了校准常数的变化以及一些实验条件对校准结果的影响。与以前的参考文献一样，结果表明白天太阳高度和风速的变化仍会影响大多数测试设备的校准常数。相反，风向和太阳方位角之间的角度或林克浊度似乎都不会影响所计算的校准常数。 Linke浊度的影响很低，因为所有涉及的日射辐射计的观察几何形状彼此非常相似，并且普遍存在低浊度。分析了太阳高度与风速之间的相关性，并发现校准常数分别随太阳高度和风速线性变化。在2014年夏季，在欧洲研究区2项目（SFERA2）的太阳能设施的背景下，在阿尔塔利亚的Plataforma太阳能（PSA）进行了高温辐射计校准测量测试。

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  • 来源
    《Solar Energy》 |2018年第7期|44-59|共16页
  • 作者

    Ferrera Cobos F.; Valenzuela R. X.; Ramirez L.; Zarzalejo L. F.; Nouri B.; Wilbert S.; Garcia G.;

  • 作者单位

    Complutense Univ Madrid UCM, Avda Seneca 2, Madrid 28040, Spain;

    CIEMAT, Energy Dept, Renewable Energy Div, Avda Complutense 90, E-28040 Madrid, Spain;

    CIEMAT, Energy Dept, Renewable Energy Div, Avda Complutense 90, E-28040 Madrid, Spain;

    CIEMAT, Energy Dept, Renewable Energy Div, Avda Complutense 90, E-28040 Madrid, Spain;

    Plataforma Solar Almeria, Inst Solar Res, German Aerosp Ctr DLR, Ctra Senes Km 4, E-04200 Tabernas, Spain;

    Plataforma Solar Almeria, Inst Solar Res, German Aerosp Ctr DLR, Ctra Senes Km 4, E-04200 Tabernas, Spain;

    Plataforma Solar Almeria, CIEMAT, Energy Dept, Ctra Senes Km 4, E-04200 Tabernas, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Solar radiation measurements; Pyrheliometer; Calibration; Standardization; Solar irradiance; Solar energy;

    机译：太阳辐射测量;高温辐射计;校准;标准化;太阳辐照度;太阳能;

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