Zibo Zhou;Prateek Bahl;Svetlana Tkachenko;Asavari Hari;Charitha de Silva;Victoria Timchenko;Martin A. Green
{"title":"Vortex Generators for Passive Cooling of Rooftop Photovoltaic Systems Under Free Convection","authors":"Zibo Zhou;Prateek Bahl;Svetlana Tkachenko;Asavari Hari;Charitha de Silva;Victoria Timchenko;Martin A. Green","doi":"10.1109/JPHOTOV.2023.3299752","DOIUrl":null,"url":null,"abstract":"Decreasing the operating temperature of a photovoltaic (PV) module can increase its electrical output and longevity. This can be achieved by increasing the radiative and convective heat losses on the front or the rear module surface. In this article, we have proposed and investigated, experimentally and numerically, a passive cooling method for the rooftop PV system, which enhances convection heat flux on the module's rear surface. As the vortex generators (VGs) are attached on the surface of the roof without physical contact to the module backsheet, this technique would not void the module warranty and can be easily retrofitted on an existing rooftop system. In the absence of wind (free convection), the module is subjected to the highest temperatures, and our VG design specifically targets this worst-case scenario. Our results reveal a temperature reduction of more than 4 °C using VGs in the configuration studied. This can be translated to a significant increase in module lifespan by around 30% to 40%, thus reducing the levelized cost of electricity.","PeriodicalId":445,"journal":{"name":"IEEE Journal of Photovoltaics","volume":"13 5","pages":"743-749"},"PeriodicalIF":2.5000,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Journal of Photovoltaics","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10214120/","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
Decreasing the operating temperature of a photovoltaic (PV) module can increase its electrical output and longevity. This can be achieved by increasing the radiative and convective heat losses on the front or the rear module surface. In this article, we have proposed and investigated, experimentally and numerically, a passive cooling method for the rooftop PV system, which enhances convection heat flux on the module's rear surface. As the vortex generators (VGs) are attached on the surface of the roof without physical contact to the module backsheet, this technique would not void the module warranty and can be easily retrofitted on an existing rooftop system. In the absence of wind (free convection), the module is subjected to the highest temperatures, and our VG design specifically targets this worst-case scenario. Our results reveal a temperature reduction of more than 4 °C using VGs in the configuration studied. This can be translated to a significant increase in module lifespan by around 30% to 40%, thus reducing the levelized cost of electricity.
期刊介绍：
The IEEE Journal of Photovoltaics is a peer-reviewed, archival publication reporting original and significant research results that advance the field of photovoltaics (PV). The PV field is diverse in its science base ranging from semiconductor and PV device physics to optics and the materials sciences. The journal publishes articles that connect this science base to PV science and technology. The intent is to publish original research results that are of primary interest to the photovoltaic specialist. The scope of the IEEE J. Photovoltaics incorporates: fundamentals and new concepts of PV conversion, including those based on nanostructured materials, low-dimensional physics, multiple charge generation, up/down converters, thermophotovoltaics, hot-carrier effects, plasmonics, metamorphic materials, luminescent concentrators, and rectennas; Si-based PV, including new cell designs, crystalline and non-crystalline Si, passivation, characterization and Si crystal growth; polycrystalline, amorphous and crystalline thin-film solar cell materials, including PV structures and solar cells based on II-VI, chalcopyrite, Si and other thin film absorbers; III-V PV materials, heterostructures, multijunction devices and concentrator PV; optics for light trapping, reflection control and concentration; organic PV including polymer, hybrid and dye sensitized solar cells; space PV including cell materials and PV devices, defects and reliability, environmental effects and protective materials; PV modeling and characterization methods; and other aspects of PV, including modules, power conditioning, inverters, balance-of-systems components, monitoring, analyses and simulations, and supporting PV module standards and measurements. Tutorial and review papers on these subjects are also published and occasionally special issues are published to treat particular areas in more depth and breadth.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
