With a 126-year history,ASTM International still exudes strong vitality today.It is one of the most renowned standards organizations in the world,boasting a globally leading standards development system and database.I...With a 126-year history,ASTM International still exudes strong vitality today.It is one of the most renowned standards organizations in the world,boasting a globally leading standards development system and database.It is open,transparent,fair,diverse,inclusive,and consensus-driven,but these are just some of its characteristics.ASTM always prioritizes the development of standards and the needs of industries and users.展开更多
From the first position as staff manager in technical committee operations to the presidency of the organization,Kathie Morgan has spent four decades at the ASTM International.It must be hard for her to say goodbye.
A variety of test methodologies are commonly used to assess if a photovoltaic system can perform in line with expectations generated by a computer simulation. One of the commonly used methodologies across the PV indus...A variety of test methodologies are commonly used to assess if a photovoltaic system can perform in line with expectations generated by a computer simulation. One of the commonly used methodologies across the PV industry is an ASTM E2848. ASTM E2848-13, 2023 test method provides measurement and analysis procedures for determining the capacity of a specific photovoltaic system built in a particular place and in operation under natural sunlight. This test method is mainly used for acceptance testing of newly installed photovoltaic systems, reporting of DC or AC system performance, and monitoring of photovoltaic system performance. The purpose of the PV Capacity Test and modeled energy test is to verify that the integrated system formed from all components of the PV Project has a production capacity that achieves the Guaranteed Capacity and the Guaranteed modeled AEP under measured weather conditions that occur when each PV Capacity Test is conducted. In this paper, we will be discussing ASTM E2848 PV Capacity test plan purpose and scope, methodology, Selection of reporting conditions (RC), data requirements, calculation of results, reporting, challenges, acceptance criteria on pass/fail test results, Cure period, and Sole remedy for EPC contractors for bifacial irradiance.展开更多
探讨了冲击测试标准ASTM D 5420的测试原理,并重新演绎平均失效能量的计算公式,提出了一种更易理解的计算方法。该研究基于样品冲击失效能量均一稳定的假设,修正了原计算方法;同时分析了测试标准用于蜂窝夹层结构冲击性能表征中的要素,...探讨了冲击测试标准ASTM D 5420的测试原理,并重新演绎平均失效能量的计算公式,提出了一种更易理解的计算方法。该研究基于样品冲击失效能量均一稳定的假设,修正了原计算方法;同时分析了测试标准用于蜂窝夹层结构冲击性能表征中的要素,包括支撑方式、失效判据、能量梯度和计算原理。结果表明:该研究所提出的计算方法步骤更为简单高效,结果更为准确,且在蜂窝夹层结构冲击失效能计算中,更加合理;同时解决了蜂窝夹层结构冲击测试中的部分问题,有利于蜂窝夹层结构冲击试验标准的建立和该材料体系抗冲击性能的表征。展开更多
文摘With a 126-year history,ASTM International still exudes strong vitality today.It is one of the most renowned standards organizations in the world,boasting a globally leading standards development system and database.It is open,transparent,fair,diverse,inclusive,and consensus-driven,but these are just some of its characteristics.ASTM always prioritizes the development of standards and the needs of industries and users.
文摘From the first position as staff manager in technical committee operations to the presidency of the organization,Kathie Morgan has spent four decades at the ASTM International.It must be hard for her to say goodbye.
文摘A variety of test methodologies are commonly used to assess if a photovoltaic system can perform in line with expectations generated by a computer simulation. One of the commonly used methodologies across the PV industry is an ASTM E2848. ASTM E2848-13, 2023 test method provides measurement and analysis procedures for determining the capacity of a specific photovoltaic system built in a particular place and in operation under natural sunlight. This test method is mainly used for acceptance testing of newly installed photovoltaic systems, reporting of DC or AC system performance, and monitoring of photovoltaic system performance. The purpose of the PV Capacity Test and modeled energy test is to verify that the integrated system formed from all components of the PV Project has a production capacity that achieves the Guaranteed Capacity and the Guaranteed modeled AEP under measured weather conditions that occur when each PV Capacity Test is conducted. In this paper, we will be discussing ASTM E2848 PV Capacity test plan purpose and scope, methodology, Selection of reporting conditions (RC), data requirements, calculation of results, reporting, challenges, acceptance criteria on pass/fail test results, Cure period, and Sole remedy for EPC contractors for bifacial irradiance.
文摘探讨了冲击测试标准ASTM D 5420的测试原理,并重新演绎平均失效能量的计算公式,提出了一种更易理解的计算方法。该研究基于样品冲击失效能量均一稳定的假设,修正了原计算方法;同时分析了测试标准用于蜂窝夹层结构冲击性能表征中的要素,包括支撑方式、失效判据、能量梯度和计算原理。结果表明:该研究所提出的计算方法步骤更为简单高效,结果更为准确,且在蜂窝夹层结构冲击失效能计算中,更加合理;同时解决了蜂窝夹层结构冲击测试中的部分问题,有利于蜂窝夹层结构冲击试验标准的建立和该材料体系抗冲击性能的表征。
