New Concepts in Solar and Thermal Radiation Conversion II最新文献

New Concepts in Solar and Thermal Radiation Conversion II Pub Date : 2019-10-01 DOI: 10.1117/12.2552955

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Hybrid thermal and electric and thermal solar energy generation based on thin-film optical coatings (Conference Presentation) 基于薄膜光学涂层的混合热电和太阳能热发电(会议报告)

New Concepts in Solar and Thermal Radiation Conversion II Pub Date : 2019-09-09 DOI: 10.1117/12.2528363

Mohamed El Kabbash, Chunlei Guo, S. Singh, G. Strangi, M. Hinczewski

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Radiative cooling for concentrating photovoltaics (Conference Presentation) 聚光光伏的辐射冷却(会议报告)

New Concepts in Solar and Thermal Radiation Conversion II Pub Date : 2019-09-09 DOI: 10.1117/12.2532033

P. Bermel

{"title":"Radiative cooling for concentrating photovoltaics (Conference Presentation)","authors":"P. Bermel","doi":"10.1117/12.2532033","DOIUrl":"https://doi.org/10.1117/12.2532033","url":null,"abstract":"Radiative cooling is a uniquely compact and passive cooling mechanism. Significant applications can be found in energy generation, particularly concentrating photovoltaics (CPV) and thermophotovoltaics (TPV). Both rely on low-bandgap PV cells that experience significant reductions in performance and lifetime when operating at elevated temperatures. This issue creates a significant barrier to widespread adoption. To address this challenge, we demonstrate enhanced radiative cooling for low-bandgap PV cells under concentrated sunlight for the first time. A composite material stack is used as the radiative cooler. Enhanced radiative cooling reduces operating temperatures by 10 degrees C, translating into a relative increase of 5.7% in open-circuit voltage and an estimated increase of 40% in lifetime at 13 suns. Using a model, we also estimate the same setup could achieve an improvement of 34% in open-circuit voltage for 35 suns, which could reduce levelized costs of energy up to 33% for high activation energy failure modes. The radiative cooling enhancement demonstrated here is a simple and straightforward approach, which can be generalized to other optoelectronic systems.","PeriodicalId":374404,"journal":{"name":"New Concepts in Solar and Thermal Radiation Conversion II","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128575943","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}

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Towards high-performance low-cost thermophotovoltaics via photon recycling and wafer reuse (Conference Presentation) 通过光子回收和晶圆再利用实现高性能低成本热光伏(会议报告)

New Concepts in Solar and Thermal Radiation Conversion II Pub Date : 2019-09-09 DOI: 10.1117/12.2528551

A. Lenert

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Smart solar windows with tunable light trapping enabled by polymer dispersed liquid crystals (Conference Presentation) 利用聚合物分散液晶实现可调光捕获的智能太阳能窗(会议报告)

New Concepts in Solar and Thermal Radiation Conversion II Pub Date : 2019-09-09 DOI: 10.1117/12.2529404

J. Murray, Dakang Ma, J. Munday

{"title":"Smart solar windows with tunable light trapping enabled by polymer dispersed liquid crystals (Conference Presentation)","authors":"J. Murray, Dakang Ma, J. Munday","doi":"10.1117/12.2529404","DOIUrl":"https://doi.org/10.1117/12.2529404","url":null,"abstract":"Windows provide an attractive platform for building integrated photovoltaics due to the presence of an existing glass substrate and their widespread deployment. A challenge in implementing integrated photovoltaics within windows are the competing design criteria between window transparency and solar cell efficiency. A common approach to address this conflict is to use a solar cell device with partially transparency in the visible range and strong light absorption in the UV and/or IR ranges. Recent research has also attempted to circumvent this trade-off using switchable materials that can transform from opaque and efficient to transparent but with poor photovoltaic performance. Here, we present a new alternative switchable device approach that couples a semiconductor solar absorber to a Polymer Dispersed Liquid Crystal (PDLC) cell. By applying an electric field these PDLC devices can be dynamically tuned from opaque, reflective and light diffusing in the off state to clear and transparent in the on state. By enabling light-trapping to greatly enhance solar cell efficiency, this off-state scattering makes PDLCs a particularly attractive option for the creation of solar windows. As an added benefit, the system provides control over haze for privacy and window reflectivity for reducing the lighting and heating costs. Enabled by the very low power requirements for maintaining the window’s transparent on-state, we also demonstrate potential for self-powering this switchable solar window.","PeriodicalId":374404,"journal":{"name":"New Concepts in Solar and Thermal Radiation Conversion II","volume":"89 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127051589","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