ORCID Profile
0000-0002-9753-9437
Current Organisation
Libera Università di Bolzano
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Publisher: AIP Publishing
Date: 02-2012
DOI: 10.1063/1.3679140
Abstract: A transfer matrix model of a luminescent down-shifter (LDS) layer, consisting of silicon nanocrystals (Si-NCs) embedded in a silicon oxide matrix, on a silicon solar cells is presented. To enhance the efficiency of the silicon solar cell, we propose using a SiO2/Si-NCs double layer stack, as an anti-reflection-coating (ARC) and as a LDS material. The optical characteristics of this stack have been simulated and optimized as a front surface coating. The cell performances have been simulated by means of a two-dimensional device simulator and compared with the performances of a reference silicon solar cell. We found a 6% relative enhancement of the energy conversion efficiency with respect to the reference cell. We demonstrate that this enhancement results from the lower reflectance and from the down-shifter effect of the Si-NCs activated coating stack.
Publisher: WIP
Date: 2016
Publisher: WIP
Date: 2015
Publisher: Journal of Facade Design and Engineering
Date: 2016
Publisher: WIP
Date: 2012
Publisher: WIP
Date: 2012
Publisher: Elsevier BV
Date: 03-2023
Publisher: ASME International
Date: 10-01-2014
DOI: 10.1115/1.4026253
Abstract: The objective of this study is to compare the performance of different solar module technologies mounted on a fixed-tilt rack (30 deg) as well as on a single and a dual axis tracker. The data of this study were taken from a 724 kWp multitechnology test field at the Airport of Bolzano in the Italian Alps (position ca.46.46N, 11.33 E), which the European Academy of Bolzano is monitoring. The technologies tested were polycrystalline silicon (p-Si) and heterojunction with an intrinsic thin-layer (HIT). We compared the performance of each system in terms of energy output, as well as the performance ratio of both technologies on the different mounting systems. A detailed shading analysis was performed and losses due to the mountainous environment were determined. Further we analyzed miss-tracking, namely, due to shading of the position sensor on the single axis tracker and further, due to high wind speeds, at which the dual axis tracker moves to a safety position. Identifying these problems helps to maximize the tracker performance and hence the energy harvest. A cost benefit analysis was then performed based on the cost of the trackers, energy price, and by comparing the results with fixed installations.
Publisher: WIP
Date: 2015
Publisher: Elsevier BV
Date: 10-2023
Publisher: American Physical Society (APS)
Date: 29-05-2009
Publisher: WIP
Date: 2018
Publisher: MDPI AG
Date: 26-05-2022
DOI: 10.3390/PR10061070
Abstract: We report the upper and lower bounds for the levelized cost of high-temperature industrial process heat, supplied from electricity generated with solar-photovoltaic (PV) and wind turbines in combination with either thermal or electric battery storage using hourly typical meteorological year (TMY) data, in systems sized to supply between 80% and 100% of continuous thermal demand at a site in the northern part of Western Australia. The system is chosen to supply high-temperature air as the heat transfer media at temperatures of 1000 °C, which is a typical temperature for an alumina or a lime calcination plant. A simplified model of the electrical energy plant has been developed using performance characteristics of real PV and wind systems and TMY data of renewable energy resources. This was used to simulate a large s le of possible system configurations and find the optimal combination of the renewable resources and storage systems, sized to provide renewable shares (RES) of between 80% and 100% of the yearly demand. This allowed the upper and lower bounds to be determined for the cost of heat based on two scenarios in which the excess energy is either dumped (upper bound) or exported to the electricity grid (lower bound) at the average generating cost. The lower bound of the levelized cost of energy (LCOEL), which occurs for the system employing thermal storage, was estimated to range from USD 10/GJ to USD 24/GJ for RES from 80 to 100%. The corresponding upper bound (LCOEU), also estimated for the system using thermal storage, are between USD 16/GJ and USD 31/GJ, for RES between 80% and 100%. The utilization of electric battery storage instead of thermal storage was found to increase the LCOE values by a factor of two to four depending on the share of renewable energy. Compared with current Australian natural gas cost, none of the systems assessed configurations is economical without either a cost for CO2 emissions or a premium for low-carbon products. The estimated cost for CO2 emission that is needed to reach parity with current natural gas prices in Australia is also presented.
Publisher: Elsevier BV
Date: 2015
Publisher: WIP
Date: 2017
Publisher: WIP
Date: 2019
Publisher: WIP
Date: 2016
Publisher: WIP
Date: 2016
Publisher: Wiley
Date: 08-02-2013
Publisher: Elsevier BV
Date: 07-2015
Publisher: WIP
Date: 2018
Publisher: WIP
Date: 2015
Publisher: American Physical Society (APS)
Date: 21-01-2010
Publisher: IOP Publishing
Date: 23-09-2009
DOI: 10.1088/0953-8984/21/41/415302
Abstract: We present a theory for spin-polarized transport through a generic organic polymer connected to ferromagnetic leads with arbitrary angle θ between their magnetization directions, taking into account the polaron and bipolaron states as effective charge and spin carriers. Within a diffusive description of polaron-bipolaron transport including polaron-bipolaron conversion, we find that the bipolaron density depends on the angle θ. This is remarkable, given the fact that bipolarons are spinless quasiparticles, and opens a new way to probe spin accumulation in organic polymers.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2018
Publisher: WIP
Date: 2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2019
Publisher: WIP
Date: 2013
No related grants have been discovered for Philip Ingenhoven.