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21世纪最具发展潜力的十大科技
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《农村电气化》 北大核心 2004年第8期45-45,共1页
关键词 基因排列图 超级突变物质 高密度能源 21世纪 科学技术
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Design Details of Low-Energy and Passive Houses Using Composites from Waste Raw Materials
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作者 Libor Matejka Jan Pencik 《Journal of Civil Engineering and Architecture》 2011年第5期440-453,共14页
The article deals with potential use of waste materials in construction industry, specifically use of high density polyethylene (HDPE). The article is focused in particular on recycled polyethylene application in pr... The article deals with potential use of waste materials in construction industry, specifically use of high density polyethylene (HDPE). The article is focused in particular on recycled polyethylene application in products designed for construction industry, especially for passive houses. Currently certain building details of passive houses are not perfect or their solution results in higher economic demands related to house purchase and its further use. For the purpose of this thesis details of windows installation in external walls and elimination of thermal bridges in wall footing have been chosen. Products were subject to mathematic modelling of thermal technique and statics. The executed mathematic models documented that products are fully functional and that the suggested product successfully eliminate insufficiencies of some currently applied solutions. 展开更多
关键词 Recycling of materials energy savings ECOLOGY WASTE POLYMER composite thermal bridges.
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Electrochemical Energy Storage Technologies and Applications
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作者 Raul Diaz 《Journal of Energy and Power Engineering》 2014年第5期794-804,共11页
The current need to fasten the implementation of renewable energies greatly depends on the development of competitive storage devices, and while there is not a single technology which is likely capable to competitivel... The current need to fasten the implementation of renewable energies greatly depends on the development of competitive storage devices, and while there is not a single technology which is likely capable to competitively cover the wide range of possible demands, electrochemical technologies are one of the most promising for many of them. For the realization of this promise, new materials fulfilling criteria such as high energy density, high power density, competitive cost, reliability, and environmental compatibility need to be developed in the near future. Electrochemical energy storage devices can be classified into two main technologies: supercapacitors and batteries (including redox flow batteries). Materials and applications for these technologies are discussed and compared, listing current status, technical and strategic challenges. 展开更多
关键词 BATTERIES SUPERCAPACITORS renewable energy distributed generation electric transport.
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Efficiency Improvement of PEM Fuel Cells via Humidity Control 被引量:1
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作者 Ahmad Haddad Louay Elsoufi +1 位作者 Marc Mannah Hasan Bazzi 《Journal of Control Science and Engineering》 2016年第1期26-35,共10页
PEM (Proton Exchange Membrane) fuel cell is a promising renewable energy source to a wide range of applications for its clean products and high power density. However, controlling its humidity is a challenging probl... PEM (Proton Exchange Membrane) fuel cell is a promising renewable energy source to a wide range of applications for its clean products and high power density. However, controlling its humidity is a challenging problem due to the interdependence of several phenomena contributing in membrane's water content. This work deals with efficiency improvement of PEM fuel cells via humidity control. An innovative strategy of control based on the model of Ref. [1] is proposed. It consists on regulating gas humidification rates according to the power demand so that to minimize power losses. The proposed control takes into consideration constraints related to humidification in order to avoid dry out or flooding of the membrane. Simulations results show that time-phasing between hydrogen and oxygen humidification rates plays an important role in minimizing power losses. The proposed control shows significant improvement in the fuel cell's efficiency up to 20%. 展开更多
关键词 PEM fuel cell mathematical modeling humidity control efficiency improvement.
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A review of negative electrode materials for electrochemical supercapacitors 被引量:20
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作者 LU XueFeng LI GaoRen TONG YeXiang 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2015年第11期1799-1808,共10页
With increasing demands for clean and sustainable energy, the advantages of high power density, high efficiency, and long life expectancy have made supercapacitors one of the major emerging devices for electrochemical... With increasing demands for clean and sustainable energy, the advantages of high power density, high efficiency, and long life expectancy have made supercapacitors one of the major emerging devices for electrochemical energy storage and power supply. However, one of the key challenges for SCs is their limited energy density, which has hindered their wider application in the field of energy storage. Despite significant progress has been achieved in the fabrication of high-energy density positive electrodes materials, negative electrode materials with high capacitance and a wide potential window are relatively less explored. In this review, we introduced some new negative electrode materials except for common carbon-based materials and what's more, based on our team's work recently, we put forward some new strategies to solve their inherent shortcoming as electrode material for SCs. 展开更多
关键词 SUPERCAPACITORS NEGATIVE energy storage REVIEW
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