Searched for: department:"Electrical%5C+Sustainable%5C+Energy"
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Pahud, C. (author), Isabella, O. (author), Naqavi, A. (author), Haug, F.J. (author), Zeman, M. (author), Herzig, H.P. (author), Ballif, C. (author)
We study n-i-p amorphous silicon solar cells with light-scattering nanoparticles in the back reflector. In one configuration, the particles are fully embedded in the zinc oxide buffer layer; In a second configuration, the particles are placed between the buffer layer and the flat back electrode. We use stencil lithography to produce the same...
journal article 2013
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Baalbergen, J.F. (author)
Service interruptions have a significant impact on society and therefore the main objective of power system planning and operation is to ensure that they do not happen. Because voltage instability is one of the dynamic phenomena that may result in a system-wide blackout, this type of stability problem has been an important research topic for...
doctoral thesis 2013
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Jäger, K. (author), Fischer, M. (author), Van Swaaij, R.A.C.M.M. (author), Zeman, M. (author)
Thin-film silicon solar cells (TFSSC), which can be manufactured from abundant materials solely, contain nano-textured interfaces that scatter the incident light. We present an approximate very fast algorithm that allows optimizing the surface morphology of two-dimensional nano-textured interfaces. Optimized nano-textures scatter the light...
journal article 2013
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Tan, H. (author), Sivec, L. (author), Yan, B. (author), Santbergen, R. (author), Zeman, M. (author), Smets, A.H.M. (author)
We show experimentally that the photocurrent of thin-film hydrogenated microcrystalline silicon (?c-Si:H) solar cells can be enhanced by 4.5?mA/cm2 with a plasmonic back reflector (BR). The light trapping performance is improved using plasmonic BR with broader angular scattering and lower parasitic absorption loss through tuning the size of...
journal article 2013
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Dogan, I. (author), Kramer, N.J. (author), Westermann, R.H.J. (author), Dohnalova, K. (author), Smets, A.H.M. (author), Verheijen, M.A. (author), Greogorkiewicz, T. (author), Van de Sanden, M.C.M. (author)
We demonstrate a method for synthesizing free standing silicon nanocrystals in an argon/silane gas mixture by using a remote expanding thermal plasma. Transmission electron microscopy and Raman spectroscopy measurements reveal that the distribution has a bimodal shape consisting of two distinct groups of small and large silicon nanocrystals with...
journal article 2013
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Ramirez-Elizondo, L.M. (author)
The world’s increasing energy demand and growing environmental concerns have motivated scientists to develop new technologies and methods to make better use of the remaining resources of our planet. The main objective of this dissertation is to develop a scheduling and control tool at the district level for small-scale systems with multiple...
doctoral thesis 2013
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Pfanner, G. (author), Freysoldt, C. (author), Neugebauer, J. (author), Inam, F. (author), Drabold, D. (author), Jarolimek, K. (author), Zeman, M. (author)
The performance of hydrogenated amorphous silicon (a-Si:H) solar cells is severely affected by the light-induced formation of metastable defects in the material (Staebler-Wronski effect). The common notion is that the dangling-bond (db) defect, a threefold coordinated silicon atom, plays a key role in the underlying mechanisms. To support the...
journal article 2013
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Ani, S.O. (author)
Wind energy accounts for an increasing percentage of the energy supplied to the electricity network. Electricity generation from wind is now cheaper than other renewables and almost cost competitive with other conventional sources of electricity generation. However, this impressive growth is largely due to advances in large wind turbines,...
doctoral thesis 2013
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Santbergen, R. (author), Smets, A.H.M. (author), Zeman, M. (author)
We present a novel approach for modeling the reflectance, transmittance and absorption depth profile of thin-film multilayer structures such as solar cells. Our model is based on the net-radiation method adapted for coherent calculations and is highly flexible while using a simple algorithm. We demonstrate that as a result arbitrary multilayer...
journal article 2013
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Demontis, V. (author), Sanna, C. (author), Melskens, J. (author), Santbergen, R. (author), Smets, A.H.M. (author), Damiano, A. (author), Zeman, M. (author)
Thin oxide interlayers are commonly added to the back reflector of thin-film silicon solar cells to increase their current. To gain more insight in the enhancement mechanism, we tested different back reflector designs consisting of aluminium-doped zinc oxide (ZnO:Al) and/or hydrogenated silicon oxide (SiOx:H) interlayers with different metals ...
journal article 2013
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Isabella, O. (author)
Solar energy can fulfil mankind’s energy needs and secure a more balanced distribution of primary sources of energy. Wafer-based and thin-film silicon solar cells dominate todays’ photovoltaic market because silicon is a non-toxic and abundant material and high conversion efficiencies are achieved with silicon-based solar cells. To stay...
doctoral thesis 2013
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Van der Geest, M. (author), Wolmarans, J.J. (author), Polinder, H. (author), Ferreira, J.A. (author), Zeilstra, D. (author)
High speed fault tolerant permanent magnet machines have strong asynchronous airgap harmonics, making them susceptible to rotor eddy-current losses. These losses can be reduced by using novel high resistivity materials like plastic bonded magnets and carbon fiber reinforced retaining sleeves. This paper examines by numerical studies the...
conference paper 2012
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Chevtchenko, O. (author), Zuijderduin, R. (author), Smit, J. (author), Willen, D. (author), Lentge, H. (author), Thidemann, C. (author), Traeholt, C. (author)
Particulars of 6 km long HTS AC power cable for Amsterdam project are: a cable has to fit in an annulus of 160 mm, with only two cooling stations at the cable ends [1]. Application of existing solutions for HTS cables would result in excessively high coolant pressure drop in the cable, possibly affecting public acceptance of the project. In...
journal article 2012
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Zuijderduin, R. (author), Chevchenko, O. (author), Smit, J.J. (author), Aanhaanen, G. (author), Melnik, I. (author), Geschiere, A. (author)
ue to increasing power demand, the electricity grid of the Netherlands is changing. The future transmission grid will obtain electrical power generated by decentralized renewable sources, together with large scale generation units located at the coastal region. In this way electrical power has to be distributed and transmitted over longer...
journal article 2012
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Chevtchenko, O. (author), Zuijderduin, R. (author), Smit, J. (author), Willen, D. (author), Lentge, H. (author), Thidemann, C. (author), Traeholt, C. (author), Melnik, I. (author), Geschiere, A. (author)
are: a cable has to fit in an annulus of 160 mm, with two cooling stations at the cable ends only. Existing solutions for HTS cables would lead to excessively high coolant pressure drop in the cable, potentially affecting public acceptance of the project. A way out would be to substantially reduce AC losses from 1 down to about 0.1 W/m per phase...
journal article 2012
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Zuijderduin, R. (author), Chevtchenko, O. (author), Smit, J.J. (author), Willen, D. (author), Melnik, I. (author), Geschiere, A. (author)
The future electricity grid will be more sustainable and it will have more power transmission and distribution capability with more electrical power added from decentralized sources on distribution level and from wind parks and other large sources on transmission level. More interconnections and more underground transmission and distribution...
journal article 2012
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Zuijderduin, R. (author), Chevtchenko, O. (author), Smit, J.J. (author), Aanhaanen, G. (author), Melnik, I. (author), Geschiere, A. (author)
Due to increasing power demand, the electricity grid of the Netherlands is changing. The future grid must be capable to transmit all the connected power. Power generation will be more decentralized like for instance wind parks connected to the grid. Furthermore, future large scale production units are expected to be installed near coastal...
journal article 2012
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Zeman, M. (author), Isabella, O. (author), Jäger, K. (author), Santbergen, R. (author), Solntsev, S. (author), Topic, M. (author), Krc, J. (author)
Light management is important for improving the performance of thin-film solar cells. Advanced concepts of efficient light scattering and trapping inside the cell structures need to be investigated. An important tool for design and optimisation of the concepts present optical modelling and simulation. In the article a model of light scattering...
journal article 2012
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De Tommasi, L. (author), Gibescu, M. (author), Brand, A.J. (author)
An important aspect related to wind energy integration into the electrical power system is the fluctuation of the generated power due to the stochastic variations of the wind speed across the area where wind turbines are installed. Simulation models are useful tools to evaluate the impact of the wind power on the power system stability and on...
journal article 2012
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Teixeira Pinto, R. (author), Fragoso Rodrigues, S. (author), Wiggelinkhuizen, E. (author), Scherrer, R. (author), Bauer, P. (author), Pierik, P. (author)
For achieving the European renewable electricity targets, a significant contribution is foreseen to come from offshore wind energy. Considering the large scale of the future planned offshore wind farms and the increasing distances to shore, grid integration through a transnational DC network is desirable for several reasons. This article...
journal article 2012
Searched for: department:"Electrical%5C+Sustainable%5C+Energy"
(101 - 120 of 185)

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