New Concepts in Solar and Thermal Radiation Conversion and Reliability最新文献_第2页

Understanding the microenvironment of a PV module for better stress testing (Conference Presentation) 了解光伏组件的微环境以进行更好的压力测试(会议演讲)

New Concepts in Solar and Thermal Radiation Conversion and Reliability Pub Date : 2018-09-18 DOI: 10.1117/12.2322172

M. Kempe

{"title":"Understanding the microenvironment of a PV module for better stress testing (Conference Presentation)","authors":"M. Kempe","doi":"10.1117/12.2322172","DOIUrl":"https://doi.org/10.1117/12.2322172","url":null,"abstract":"An understanding of the exposure environment of any material is necessary for the use of accelerated stress testing to evaluate different designs, materials, and configurations. For photovoltaic modules there is a wide range of environments and mounting conditions, each with a unique combination of temperature and humidity profiles. This is further compounded by differences in the microenvironment within a module, e.g. the humidity in the front EVA is not the same as the humidity in the backside EVA, and the presence of seasonal and diurnal changes in water content. We demonstrate how one can model the temperature and humidity environments of representative climates and use this to estimate the amount of moisture present in a PV module. To compare the relative degradation in different environments and to compare this to indoor testing, one must consider kinetically weighted parameters to characterize an environment. With some understanding of the kinetics, better choices for stress testing conditions can be made to minimize the uncertainty in correlating chamber results to the field allowing for better rank ordering of material and better service life prediction. This more general analysis highlights the fact that within reasonable limits a single humidity can represent a given climate. Thus, when a lower representative humidity is used, one can focus testing conditions on temperature effects and/or UV radiation. This can significantly simplify testing when very little is known about the humidity dependence of degradation processes.","PeriodicalId":324661,"journal":{"name":"New Concepts in Solar and Thermal Radiation Conversion and Reliability","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121193364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chasing a 50% efficient solar cell, and fun things we’ve done along the way (Conference Presentation) 追求50%效率的太阳能电池，以及我们在此过程中所做的有趣的事情(会议演讲)

New Concepts in Solar and Thermal Radiation Conversion and Reliability Pub Date : 2018-09-18 DOI: 10.1117/12.2325955

M. Steiner

引用次数: 0

Resonant coupling for light trapping in colloidal quantum dot photovoltaics (Conference Presentation) 胶体量子点光伏中光捕获的共振耦合(会议报告)

New Concepts in Solar and Thermal Radiation Conversion and Reliability Pub Date : 2018-09-18 DOI: 10.1117/12.2322889

F. Beck, G. Konstantatos

引用次数: 0

Detailed balance efficiencies for luminescent solar concentrators with aligned semiconductor nanorods (Conference Presentation) 排列半导体纳米棒的发光太阳能聚光器的详细平衡效率(会议报告)

New Concepts in Solar and Thermal Radiation Conversion and Reliability Pub Date : 2018-09-18 DOI: 10.1117/12.2323215

M. Sheldon

引用次数: 0

Degradation analysis of polyamide-based backsheets in field photovoltaic modules under different climatic conditions (Conference Presentation) 不同气候条件下聚酰胺基背板在野外光伏组件中的降解分析(会议报告)

New Concepts in Solar and Thermal Radiation Conversion and Reliability Pub Date : 2018-09-18 DOI: 10.1117/12.2325843

Yadong Lyu, A. Fairbrother, Jae Hyun Kim, X. Gu, M. Kempe, Liang Ji, K. Whitfield, K. Boyce, Adam W. Hauser, Gregory S. O‘Brien, S. Julien, K. Wan, Yu Wang, L. Bruckman, R. French

{"title":"Degradation analysis of polyamide-based backsheets in field photovoltaic modules under different climatic conditions (Conference Presentation)","authors":"Yadong Lyu, A. Fairbrother, Jae Hyun Kim, X. Gu, M. Kempe, Liang Ji, K. Whitfield, K. Boyce, Adam W. Hauser, Gregory S. O‘Brien, S. Julien, K. Wan, Yu Wang, L. Bruckman, R. French","doi":"10.1117/12.2325843","DOIUrl":"https://doi.org/10.1117/12.2325843","url":null,"abstract":"Polyamide (PA)-based backsheet as an emerging product has been developed in recent years to partially substitute fluoropolymer materials under the intensified cost-reduction pressure. However, a number of reports indicate that backsheet cracks have been observed in fielded modules in a few locations after only a few years of exposure. An in-depth analysis on degradation and crack formation and their dependence on climatic conditions is needed. In this work, the field PV modules with PA-based backsheet under five different climatic conditions up to six years were retrieved and analyzed, including humid subtropical climate (Changshu, China), dry-summer subtropical climate (Rome, Italy), marine west coast climate (Bergamo, Italy), desert climate (Arizona, United States) and tropical climate (Thailand). Macroscopic cracks in backsheet were observed for modules aged in Italy and Thailand, while only hairline cracks showed up in backsheet from Changshu, and no cracks could be seen in Arizona. Backsheet in Changshu also experienced much higher yellowing than other sites, while the gloss loss of the backsheet in Italy is the highest. Spectroscopic analyses were also performed to identify various degradation products and to understand the possible changes in degradation mechanism of backsheets under different climates. The intercorrelations between various degradation modes of PA-based backsheet and weathering factors will be further established, providing a valuable information on the material selection and lifetime prediction for the backsheet.","PeriodicalId":324661,"journal":{"name":"New Concepts in Solar and Thermal Radiation Conversion and Reliability","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121216331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1