Journal of Photonics for Energy最新文献_第8页

Solar module orientation and tracking type performance and optimization 太阳能组件定向和跟踪类型性能和优化

IF 1.7 4区工程技术

Journal of Photonics for Energy Pub Date : 2021-10-01 DOI: 10.1117/1.JPE.11.045501

Sooraj Sharma, Paul W. Leu

{"title":"Solar module orientation and tracking type performance and optimization","authors":"Sooraj Sharma, Paul W. Leu","doi":"10.1117/1.JPE.11.045501","DOIUrl":"https://doi.org/10.1117/1.JPE.11.045501","url":null,"abstract":"Abstract. The efficiency and performance of solar cells and modules are typically evaluated and reported at normal incidence under peak solar radiation. We present a simple clear-sky model for solar irradiance that can be used to study the angular and annual performance of new photovoltaic materials. Using this model, we study the effect of solar module orientation for fixed-tilt module installations and different types of tracking (seasonal, 1D, and 2D) as a function of latitude. For fixed-tilt modules, the optimum tilt as a fraction of latitude varies from 0.83 at 1 deg to 0.73 at 60 deg. The effect of tilt misorientation for panels at the optimum azimuth is not very strong as the solar irradiance is about 94.5% of its optimum at ±20 deg mistilt. Both azimuth misorientation and tilt misorientation are studied. Optimized tilts and times of year for tilting are also obtained for modules that are seasonally adjusted twice and three times a year. The annual solar insolation of fixed modules is compared with modules that are seasonally adjusted twice and three times a year, continuously tracked in the north/south direction, continuously tracked in the east/west direction, and continuously tracked in two directions. The use of single-axis tracking in the east/west direction is preferable to north/south tracking and potentially improves overall energy collection by 16.2% to 31.0%. Continuous dual-axis tracking enhances overall annual energy collection by 36.0% to 45.5%. The model and provision of open source code provides for a way to assess the performance of new materials.","PeriodicalId":16781,"journal":{"name":"Journal of Photonics for Energy","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49051182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerically enhancing daytime radiative cooling performance of random dielectric microsphere coatings by hollow structures 空心结构对随机介质微球涂层日间辐射冷却性能的数值增强

IF 1.7 4区工程技术

Journal of Photonics for Energy Pub Date : 2021-10-01 DOI: 10.1117/1.JPE.11.042108

Meijie Chen, Shuang Li, Dan Pang, Yanwei Zhao, Yuan Yang, Hong-jie Yan

{"title":"Numerically enhancing daytime radiative cooling performance of random dielectric microsphere coatings by hollow structures","authors":"Meijie Chen, Shuang Li, Dan Pang, Yanwei Zhao, Yuan Yang, Hong-jie Yan","doi":"10.1117/1.JPE.11.042108","DOIUrl":"https://doi.org/10.1117/1.JPE.11.042108","url":null,"abstract":"Abstract. Dielectric microsphere coatings for passive daytime radiative cooling (PDRC) are gaining attention owing to their low cost and potential for mass production. The cooling performance could be further enhanced to effectively reflect solar radiation and emit thermal radiation to the cold sky by designing microspheres suitable for PDRC applications. Hollow dielectric structures were numerically designed to enhance the PDRC performance of dielectric microsphere coatings. The maximum solar reflectance (R¯solar = 0.96) was obtained with a fill rate f = 0.6, outer radius rout = 0.5 μm, core–shell rate φ = rin / rout = 0.3, thickness t = 300 μm, and thermal infrared emittance ε¯LWIR = 0.90. Furthermore, by controlling the multisize sphere distribution within φ = 0.1 to 0.5, the cooling performance at t = 300 μm was enhanced to R¯solar = 0.98, ε¯LWIR = 0.95, and a net cooling power of 77 W / m2 was achieved at a temperature of 25°C, which was ∼38 % higher than that achieved with the single-size sphere coating (φ = 0.3) and ∼64 % higher than that of the solid SiO2 sphere coating (φ = 0). These results indicate that hollow structures can effectively enhance the cooling performance of dielectric microsphere coatings by increasing the number of interfaces between the air and dielectric materials.","PeriodicalId":16781,"journal":{"name":"Journal of Photonics for Energy","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46131055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Highly efficient perovskite solar cells fabricated in high humidity using mixed antisolvent 使用混合反溶剂在高湿度下制备高效钙钛矿太阳能电池

IF 1.7 4区工程技术

Journal of Photonics for Energy Pub Date : 2021-10-01 DOI: 10.1117/1.JPE.11.045502

Jun He, Shengyu Jiang, Shunmin Ding, Minlin Jiang

引用次数: 0

Dynamic control of polarized thermal emission from VO2 nanofins VO2纳米纤维极化热发射的动态控制

IF 1.7 4区工程技术

Journal of Photonics for Energy Pub Date : 2021-10-01 DOI: 10.1117/1.JPE.11.042111

Caleb Estherby, M. Arnold, M. Tai, A. Gentle

引用次数: 0

Bilayer structured coating for radiative cooling applications 用于辐射冷却应用的双层结构涂层

IF 1.7 4区工程技术

Journal of Photonics for Energy Pub Date : 2021-10-01 DOI: 10.1117/1.JPE.11.042109

Rongbing Wan, Zhihao Ma, Weiping Xu, Wenbo Zhao, Jingtao Xu, Ronggui Yang

引用次数: 0

Colorful surfaces for radiative cooling 彩色表面辐射冷却

IF 1.7 4区工程技术

Journal of Photonics for Energy Pub Date : 2021-10-01 DOI: 10.1117/1.JPE.11.042107

Lyu Zhou, Jacob Rada, Haomin Song, B. Ooi, Zongfu Yu, Qiaoqiang Gan

引用次数: 14

Retrospective on the resource for radiative cooling 辐射冷却资源回顾

IF 1.7 4区工程技术

Journal of Photonics for Energy Pub Date : 2021-10-01 DOI: 10.1117/1.JPE.11.042106

P. Berdahl

引用次数: 2

Erratum: Performance enhancement of ultrathin graded Cu(InGa)Se2 solar cells through modification of the basic structure and adding antireflective layers 勘误:通过修改基本结构和增加抗反射层来增强超薄梯度Cu(InGa)Se2太阳能电池的性能

IF 1.7 4区工程技术

Journal of Photonics for Energy Pub Date : 2021-10-01 DOI: 10.1117/1.jpe.11.049901

M. Amiri, A. Eskandarian, A. A. Ziabari

引用次数: 0

Zinc sulfide-pigmented polyethylene aerogel covers for daytime radiative cooling 用于日间辐射冷却的硫化锌着色聚乙烯气凝胶覆盖物

IF 1.7 4区工程技术

Journal of Photonics for Energy Pub Date : 2021-10-01 DOI: 10.1117/1.JPE.11.042110

A. Leroy, B. Bhatia, U. T. Njike, Geoffrey Vaartstra, E. Wang

{"title":"Zinc sulfide-pigmented polyethylene aerogel covers for daytime radiative cooling","authors":"A. Leroy, B. Bhatia, U. T. Njike, Geoffrey Vaartstra, E. Wang","doi":"10.1117/1.JPE.11.042110","DOIUrl":"https://doi.org/10.1117/1.JPE.11.042110","url":null,"abstract":"Abstract. Optically selective and thermally insulating (OSTI) covers, such as polyethylene aerogels (PEAs), have recently been proposed to improve subambient daytime radiative cooling performance by minimizing parasitic solar absorption and heat gain at the emitter. We investigate the addition of zinc sulfide (ZnS) nanoparticles inside PEAs to improve their optical selectivity. Solving for multiple scattering effects using the radiative transfer equation and Mie theory, we model the optical properties of PEA covers with different ZnS concentrations and particle diameters. Our theoretical and experimental results show that ZnS particles inside PEAs can significantly reduce solar transmittance (<0.01) while maintaining high infrared transmittance (>0.8). Our modeling also demonstrates that ZnS-pigmented PEA covers enable higher subambient cooling powers (up to 53.8 W / m2 higher) and lower stagnation temperatures than conventional PEA under direct solar radiation (1000 W / m2). Finally, we investigate spatial distribution of ZnS within the cover and show that confining the ZnS near the air–cover boundary can reduce the total ZnS mass required by 59% or can enable 4% higher cooling power. Our findings promise to improve the performance of subambient radiative coolers and enable their application in passive cooling of buildings and refrigeration of food produce.","PeriodicalId":16781,"journal":{"name":"Journal of Photonics for Energy","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49128170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Melamine-doped cathode interlayer enables high-efficiency organic solar cells 三聚氰胺掺杂阴极中间层实现了高效有机太阳能电池

IF 1.7 4区工程技术

Journal of Photonics for Energy Pub Date : 2021-09-16 DOI: 10.1117/12.2602303

X. Xiong, Xiaonan Xue, Ming Zhang, Tianyu Hao, Zhiyue Han, Yueyang Sun, Yongming Zhang, Feng Liu, Supeng Pei, Lei Zhu

引用次数: 24