Tag Archives: Photovoltaics

755–761 M. Daneček, M. Havrlík, V. Beránek, J. Šafránková, M. Libra, V. Poulek, J. Sedláček and R. Belza
Design and data comparison of the photovoltaic power plants in the southern and northern hemispheres
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Design and data comparison of the photovoltaic power plants in the southern and northern hemispheres

M. Daneček¹, M. Havrlík¹, V. Beránek², J. Šafránková¹*, M. Libra¹, V. Poulek¹, J. Sedláček¹ and R. Belza¹

¹Czech University of Life Sciences Prague, Kamýcká 129, CZ16500 Prague, Czech Republic
²Solarmonitoring, Ltd., Prague, Czech Republic
*Correspondence: janicka.safrankova@gmail.com

Abstract:

We have recently developed a unique monitoring system for photovoltaic power plants and have gradually improved it in recent years. The system is installed at about 80 power plants in several European countries and at one power plant in Chile. We collect and evaluate all data in our laboratory. In this paper we describe the unique design of a photovoltaic power plant in the southern hemisphere in Chile with photovoltaic panels installed on tracking stands. We present the evaluated data and we discuss their comparison with photovoltaic power plants installed in Europe. We also discuss different solar conditions of these locations.

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982–986 M-Q. Dang, J. Šafránková, M. Libra, V. Poulek, P. Kouřím and J. Sedláček
Autonomous photovoltaic system for night-time lighting in the stable
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Autonomous photovoltaic system for night-time lighting in the stable

M-Q. Dang, J. Šafránková, M. Libra, V. Poulek, P. Kouřím and J. Sedláček

Czech University of Life Sciences Prague, Kamycka 129, CZ16521 Prague, Czech Republic
*Correspondence: janicka.safrankova@gmail.com

Abstract:

Autonomous photovoltaic (PV) systems are suitable, for example, for powering various appliances or scientific instruments in the field, for automatic data collection, for signaling, etc. At the Czech University of Life Sciences Prague, we have designed an experimental autonomous PV system designed for night-time lighting for orientating in a stable for horses. The article describes the construction of a PV system with a PV panel rated at 170 Wp, with a lead-acid accumulator and a 1,5 W LED light source. The data collection was automated. The data evaluation shows that during the whole year, the PV system has been recharged and there was no lighting failure. The paper also presents important measured characteristics.

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1386-1394 M. Libra, T. Olšan, V. Avramov and V. Poulek
Low degradation of a-Si solar panels of the building integrated PV power plant in Prague historical area
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Low degradation of a-Si solar panels of the building integrated PV power plant in Prague historical area

M. Libra¹*, T. Olšan¹, V. Avramov² and V. Poulek¹

¹Czech University of Life Sciences Prague, Faculty of Engineering, Department of Physics, Kamycka 129, CZ 16521 Prague, Czech Republic
²ENESA, joint-stock company, Prague, Czech Republic
*Correspondence: libra@tf.czu.cz

Abstract:

The unique photovoltaic power plant installed in Prague on the roof of the new buildings of National Theatre in Prague has been investigated. As the new buildings are very close to the old historical building of National Theatre designed in late 19th century, the PV power plant has to be totally invisible from the streets of Prague to not disturb historical panorama of the city. Flexible a-Si photovoltaic foils in the nearly horizontal position have been used because the placing is in the urban conservation area in the historical city centre. The operation started in the autumn 2009. The photovoltaic power plant is described in this paper and results of its operation are presented. The energy production data indicate that the degradation of the nearly horizontally installed a-Si panels is below 5% within 5 years period.

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