Optics + Photonics for Sustainable Energy最新文献_第7页

Three junction holographic micro-scale PV system 三结全息微尺度光伏系统

Optics + Photonics for Sustainable Energy Pub Date : 2016-09-23 DOI: 10.1117/12.2237004

Yuechen Wu, S. Vorndran, Silvana Ayala Pelaez, R. Kostuk

{"title":"Three junction holographic micro-scale PV system","authors":"Yuechen Wu, S. Vorndran, Silvana Ayala Pelaez, R. Kostuk","doi":"10.1117/12.2237004","DOIUrl":"https://doi.org/10.1117/12.2237004","url":null,"abstract":"In this work a spectrum splitting micro-scale concentrating PV system is evaluated to increase the conversion efficiency of flat panel PV systems. In this approach, the dispersed spectrum splitting concentration systems is scaled down to a small size and structured in an array. The spectrum splitting configuration allows the use of separate single bandgap PV cells that increase spectral overlap with the incident solar spectrum. This results in an overall increase in the spectral conversion efficiency of the resulting system. In addition other benefits of the micro-scale PV system are retained such reduced PV cell material requirements, more versatile interconnect configurations, and lower heat rejection requirements that can lead to a lower cost system. The system proposed in this work consists of two cascaded off-axis holograms in combination with a micro lens array, and three types of PV cells. An aspherical lens design is made to minimize the dispersion so that higher concentration ratios can be achieved for a three-junction system. An analysis methodology is also developed to determine the optical efficiency of the resulting system, the characteristics of the dispersed spectrum, and the overall system conversion efficiency for a combination of three types of PV cells.","PeriodicalId":140444,"journal":{"name":"Optics + Photonics for Sustainable Energy","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124155485","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: 2

Environmental stability study of holographic solar spectrum splitting materials 全息太阳光谱分裂材料的环境稳定性研究

Optics + Photonics for Sustainable Energy Pub Date : 2016-09-23 DOI: 10.1117/12.2237071

Benjamin D. Chrysler, Silvana Ayala Pelaez, Yuechen Wu, S. Vorndran, R. Kostuk

{"title":"Environmental stability study of holographic solar spectrum splitting materials","authors":"Benjamin D. Chrysler, Silvana Ayala Pelaez, Yuechen Wu, S. Vorndran, R. Kostuk","doi":"10.1117/12.2237071","DOIUrl":"https://doi.org/10.1117/12.2237071","url":null,"abstract":"In this study the impact of outdoor temperature variations and solar illumination exposure on spectral filter material and holographic optical elements is examined. Although holographic components have been shown to be useful for solar spectrum splitting designs, relatively little quantitative data exist to demonstrate the extent to which these materials can withstand outdoor conditions. As researchers seek to investigate practical spectrum splitting designs, the environmental stability of holographic materials should be considered as an important factor. In the experiment presented, two holographic materials, Covestro Bayfol HX photopolymer and dichromated gelatin, and 3M reflective polymer filter materials are exposed to outdoor conditions for a period of several months. The environmental effect on absorption, spectral and angular bandwidth, peak efficiency, and Bragg matching conditions for the holograms are examined. Spectral bandwidth and transmittance of the 3M reflective filter material are also monitored. Holographic gratings are recorded, measured, and mounted on glass substrates and then sealed with a glass cover plate. The test samples are then mounted on a photovoltaic panel to simulate realistic temperature conditions and placed at an outdoor test facility in Tucson, Arizona. A duplicate set of holograms and 3M filter material is stored as a control group and periodically compared over the test period.","PeriodicalId":140444,"journal":{"name":"Optics + Photonics for Sustainable Energy","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127538709","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: 2

High-efficiency solar energy conversion with spectrum splitting prismatic lens (and other configurations) 高效太阳能转换分光棱镜透镜(及其他配置)

Optics + Photonics for Sustainable Energy Pub Date : 2016-09-23 DOI: 10.1117/12.2237711

Harry Apostoleris, C. Maragliano, M. Chiesa, M. Stefancich

引用次数: 0

Performance assessment and transient optimization of multi-stage solid desiccant air conditioning systems with building PV/T integration 建筑PV/T一体化多级固体干燥剂空调系统性能评估及暂态优化

Optics + Photonics for Sustainable Energy Pub Date : 2016-09-23 DOI: 10.1117/12.2237520

M. Gadalla, M. Saghafifar

{"title":"Performance assessment and transient optimization of multi-stage solid desiccant air conditioning systems with building PV/T integration","authors":"M. Gadalla, M. Saghafifar","doi":"10.1117/12.2237520","DOIUrl":"https://doi.org/10.1117/12.2237520","url":null,"abstract":"One of the popular solar air conditioning technologies is desiccant air conditioning. Nonetheless, single stage desiccant air conditioning systems’ coefficient of performance (COP) are relatively low. Therefore, multi-stage solid desiccant air conditioning systems are recommended. In this paper, an integrated double-stage desiccant air conditioning systems and PV/T collector is suggested for hot and humid climates such as the UAE. The results for the PV/T implementation in the double-stage desiccant cooling system are assessed against the PV/T results for a single-stage desiccant air conditioning system. In order to provide a valid comparative evaluation between the single and double stage desiccant air conditioning systems, an identical PV/T module, in terms of dimensions, is incorporated into these systems. The overall required auxiliary air heating is abated by 46.0% from 386.8 MWh to 209.0 MWh by replacing the single stage desiccant air conditioning system with the proposed double stage configuration during June to October. Moreover, the overall averaged solar share during the investigated months for the single and double stage systems are 36.5% and 43.3%.","PeriodicalId":140444,"journal":{"name":"Optics + Photonics for Sustainable Energy","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125256010","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

Solar-thermophotovoltaic systems using spectrally selective absorber/emitter based on metal-dielectric multilayer 基于金属-介电多层材料的光谱选择性吸收/发射体太阳能-热光伏系统

Optics + Photonics for Sustainable Energy Pub Date : 2016-09-23 DOI: 10.1117/12.2237672

A. Kohiyama, M. Shimizu, H. Yugami

{"title":"Solar-thermophotovoltaic systems using spectrally selective absorber/emitter based on metal-dielectric multilayer","authors":"A. Kohiyama, M. Shimizu, H. Yugami","doi":"10.1117/12.2237672","DOIUrl":"https://doi.org/10.1117/12.2237672","url":null,"abstract":"In this paper, high-efficiency STPV systems are investigated using spectrally selective absorber/emitter consisted of metal-dielectric multilayer and a GaSb TPV cell. A solar-thermophotovoltaic (STPV) system is expected to as highefficiency solar energy conversion using single-junction photovoltaic (PV) cells. However, the reached experimental system efficiency has been still low because spectral control of emitter is not sufficient. Narrowband thermal radiation from the emitter is effective for obtaining high-efficiency STPV systems, exceeding the Shockley-Queisser limit. From theoretical analysis, the narrowband thermal emitter can leads to obtain PV conversion efficiency over 45% at Qvalue= 30 and 1300K. The spectrally selective absorber/emitter was also investigated to obtain high ηPV. The ηPV = 23.5% was estimated by the fabricated emitter spectrum, which exceeds the Shockley-Queisser limit of 19.6% for a GaSb bandgap of 0.67 eV. The entire STPV system and the power generation tests were conducted using the fabricated absorber/emitter. The total system efficiency 4.9% at 1505K was obtained under an irradiance of 109 Wcm-2.","PeriodicalId":140444,"journal":{"name":"Optics + Photonics for Sustainable Energy","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128060028","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

Photoelectrochemical reaction in conducting polymers for solar energy harvesting and charge storage 用于太阳能收集和电荷储存的导电聚合物的光电化学反应

Optics + Photonics for Sustainable Energy Pub Date : 2016-09-23 DOI: 10.1117/12.2238103

F. Rahimi, Tete Tevi, A. Takshi

引用次数: 2

Segmented holographic spectrum splitting concentrator 分段全息分光聚光器

Optics + Photonics for Sustainable Energy Pub Date : 2016-09-23 DOI: 10.1117/12.2236699

Silvana Ayala P., S. Vorndran, Yuechen Wu, Benjamin D. Chrysler, R. Kostuk

{"title":"Segmented holographic spectrum splitting concentrator","authors":"Silvana Ayala P., S. Vorndran, Yuechen Wu, Benjamin D. Chrysler, R. Kostuk","doi":"10.1117/12.2236699","DOIUrl":"https://doi.org/10.1117/12.2236699","url":null,"abstract":"This paper presents a segmented parabolic concentrator employing holographic spectral filters that provide focusing and spectral bandwidth separation capability to the system. Strips of low band gap silicon photovoltaic (PV) cells are formed into a parabolic surface as shown by Holman et. al. [1]. The surface of the PV segments is covered with holographic elements formed in dichromated gelatin. The holographic elements are designed to transmit longer wavelengths to silicon cells, and to reflect short wavelength light towards a secondary collector where high-bandgap PV cells are mounted. The system can be optimized for different combinations of diffuse and direct solar illumination conditions for particular geographical locations by controlling the concentration ratio and filtering properties of the holographic elements. In addition, the reflectivity of the back contact of the silicon cells is used to increase the optical path length and light trapping. This potentially allows the use of thin film silicon for the low bandgap PV cell material. The optical design combines the focusing properties of the parabolic concentrator and the holographic element to control the concentration ratio and uniformity of the spectral distribution at the high bandgap cell location. The presentation concludes with a comparison of different spectrum splitting holographic filter materials for this application.","PeriodicalId":140444,"journal":{"name":"Optics + Photonics for Sustainable Energy","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121273780","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

Ultra-high aspect ratio copper nanowires as transparent conductive electrodes for dye sensitized solar cells 超高宽高比铜纳米线作为染料敏化太阳能电池的透明导电电极

Optics + Photonics for Sustainable Energy Pub Date : 2016-09-23 DOI: 10.1117/12.2237406

Zhaozhao Zhu, T. Mankowski, A. S. Shikoh, F. Touati, M. Benammar, M. Mansuripur, C. Falco

{"title":"Ultra-high aspect ratio copper nanowires as transparent conductive electrodes for dye sensitized solar cells","authors":"Zhaozhao Zhu, T. Mankowski, A. S. Shikoh, F. Touati, M. Benammar, M. Mansuripur, C. Falco","doi":"10.1117/12.2237406","DOIUrl":"https://doi.org/10.1117/12.2237406","url":null,"abstract":"We report the synthesis of ultra-high aspect ratio copper nanowires (CuNW) and fabrication of CuNW-based transparent conductive electrodes (TCE) with high optical transmittance (>80%) and excellent sheet resistance (Rs <30 Ω/sq). These CuNW TCEs are subsequently hybridized with aluminum-doped zinc oxide (AZO) thin-film coatings, or platinum thin film coatings, or nickel thin-film coatings. Our hybrid transparent electrodes can replace indium tin oxide (ITO) films in dye-sensitized solar cells (DSSCs) as either anodes or cathodes. We highlight the challenges of integrating bare CuNWs into DSSCs, and demonstrate that hybridization renders the solar cell integrations feasible. The CuNW/AZO-based DSSCs have reasonably good open-circuit voltage (Voc = 720 mV) and short-circuit current-density (Jsc = 0.96 mA/cm2), which are comparable to what is obtained with an ITO-based DSSC fabricated with a similar process. Our CuNW-Ni based DSSCs exhibit a good open-circuit voltage (Voc = 782 mV) and a decent short-circuit current (Jsc = 3.96 mA/cm2), with roughly 1.5% optical-to-electrical conversion efficiency.","PeriodicalId":140444,"journal":{"name":"Optics + Photonics for Sustainable Energy","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128796823","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

Measurement of photoluminescence from a twisted-nematic liquid crystal/dye cell for an application in an energy-harvesting display 用于能量收集显示器的扭曲向列液晶/染料电池的光致发光测量

Optics + Photonics for Sustainable Energy Pub Date : 2016-09-23 DOI: 10.1117/12.2237454

Masamichi Ohta, S. Itaya, Shintaro Ozawa, Nada Dianah Binti M. Azmi, I. Fujieda

{"title":"Measurement of photoluminescence from a twisted-nematic liquid crystal/dye cell for an application in an energy-harvesting display","authors":"Masamichi Ohta, S. Itaya, Shintaro Ozawa, Nada Dianah Binti M. Azmi, I. Fujieda","doi":"10.1117/12.2237454","DOIUrl":"https://doi.org/10.1117/12.2237454","url":null,"abstract":"One can convert a Luminescent Solar Concentrator (LSC) to an energy-harvesting display by scanning a laser beam on it. By incorporating a guest-host system of liquid crystal (LC) and dye materials in an LSC, the power of photoluminescence (PL) utilized for either display or energy-harvesting can be adjusted to the changes in ambient lighting conditions. We have measured basic characteristics of an LC/dye cell with twisted-nematic (TN) alignment. These are absorption of the laser light, PL radiation pattern, contrast of luminance, spreading of the PL generated by a narrow laser beam, and their dependencies on the bias. The results are similar to those of the LC/dye cell with antiparallel (AP) alignment with the following exceptions. First, absorption by the TN cell depends on the bias for both polarization components of the excitation light, while the AP cell exhibits a bias dependency only for the component polarized along the alignment direction. Second, the PL from the TN cell is mostly polarized along the alignment direction on the exit side of the cell while the PL from the AP cell is mostly polarized along its alignment direction. These observations can be attributed to the fact that the polarization plane of a linearly polarized light rotates as it propagated the TN-LC layer. For both AP and TN cells, low-intensity PL is observed from the whole cell surfaces. This can degrade the contrast of a displayed image. Bias application to the cell suppresses this effect.","PeriodicalId":140444,"journal":{"name":"Optics + Photonics for Sustainable Energy","volume":"118 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131190434","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

Selecting a proper design period for heliostat field layout optimization using Campo code 利用Campo代码选择合适的设计周期进行定日镜场布局优化

Optics + Photonics for Sustainable Energy Pub Date : 2016-09-23 DOI: 10.1117/12.2238507

M. Saghafifar, M. Gadalla

{"title":"Selecting a proper design period for heliostat field layout optimization using Campo code","authors":"M. Saghafifar, M. Gadalla","doi":"10.1117/12.2238507","DOIUrl":"https://doi.org/10.1117/12.2238507","url":null,"abstract":"In this paper, different approaches are considered to calculate the cosine factor which is utilized in Campo code to expand the heliostat field layout and maximize its annual thermal output. Furthermore, three heliostat fields containing different number of mirrors are taken into consideration. Cosine factor is determined by considering instantaneous and time-average approaches. For instantaneous method, different design days and design hours are selected. For the time average method, daily time average, monthly time average, seasonally time average, and yearly time averaged cosine factor determinations are considered. Results indicate that instantaneous methods are more appropriate for small scale heliostat field optimization. Consequently, it is proposed to consider the design period as the second design variable to ensure the best outcome. For medium and large scale heliostat fields, selecting an appropriate design period is more important. Therefore, it is more reliable to select one of the recommended time average methods to optimize the field layout. Optimum annual weighted efficiency for heliostat fields (small, medium, and large) containing 350, 1460, and 3450 mirrors are 66.14%, 60.87%, and 54.04%, respectively.","PeriodicalId":140444,"journal":{"name":"Optics + Photonics for Sustainable Energy","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114156849","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: 6