186,185 research outputs found
Rondine PV concentrators: Field results and progresses
No full textIn this work the experimental results of two pilot installations of 3.8 kWp and 4.9 kWp of Rondine PV concentrators installed in Italy are presented. These concentrating modules have a medium concentration level (25×) and employ silicon solar cells. The non-imaging optics of the concentrator allows for larger angular acceptance respect to many CPV modules, giving us the possibility to employ trackers for standard PV modules. The effect of soiling in these first installations is evaluated as well as their working conditions in different weather situations
Rondine® PV concentrators: Field results and developments
No full textIn this work the experimental results of a new PV concentrator (named Rondine®) are presented. This concentrating module has a medium concentration level (∼25X) and employs silicon solar cells. The tests have been carried out in Italy and the energy production of a prototype module is compared with that produced from a tracking flat plate crystalline PV panel. The non-imaging optics of the concentrator allows for larger angular acceptance with respect to many solar concentrators, giving us the possibility to employ trackers for standard PV modules. The first results of complete systems of 3-9 and 4-8 kW of peak power installed in summer 2008 are presented here. Copyright © 2009 John Wiley & Sons, Ltd
Optical simulation of Rondine® PV solar concentrators by two inverse characterization methods
No full textIn this paper we describe two optical characterization methods applied to photovoltaic solar concentrators. Both methods are of the 'inverse' type, where the light source is applied in place of the receiver in order to reverse the path of light inside the concentrator. The first method is the 'inverse illumination method', already known in the literature, whereas the second one is a method obtained by modifying the 'inverse luminescence method', operating with electroluminescent light. Both methods use ideal Lambertian sources for producing the inverse light and can be applied to any type of solar concentrator (photovoltaic or thermodynamic). The optical simulations show their equivalence in obtaining the angular distribution of the transmission efficiency function of Rondine® PV concentrators, but the original inverse illumination method requires a simpler configuration and significantly lower simulation times. © 2012 IOP Publishing Ltd
Myocardial bridging on left anterior descending coronary artery evaluated by multidetector computed tomography
No full textMyocardial bridging on left anterior descending coronary artery evaluated by multidetector computed tomography
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