<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2071-0054</journal-id>
<journal-title><![CDATA[Revista Ciencias Técnicas Agropecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cie Téc Agr]]></abbrev-journal-title>
<issn>2071-0054</issn>
<publisher>
<publisher-name><![CDATA[Universidad Agraria de La Habana]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2071-00542019000100008</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Develop of a system for the mensuration of the energy efficiency of solar cells]]></article-title>
<article-title xml:lang="es"><![CDATA[Desarrollo de un sistema para la medición de la eficiencia energética de celdas solares]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almanza-Fundora]]></surname>
<given-names><![CDATA[Ivelisse]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Fernández]]></surname>
<given-names><![CDATA[Regla Ramona]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Reina]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Ciego de Ávila Máximo Gómez Báez Facultad de Ciencias Técnicas ]]></institution>
<addr-line><![CDATA[ Ciego de Ávila]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<volume>28</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2071-00542019000100008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2071-00542019000100008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2071-00542019000100008&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT This document deals with the development of a system for the measurement of the solar power and the electric power generated by the solar cells of a photovoltaic panel, in order to assess energy efficiency in the conversion of light energy into electrical energy. So the first thing is to calibrate the light power emitted a tungsten lamp, taking into account the temperature of the filament and the emittance of the tungsten as a function of temperature and wavelength. The temperature of the filament is determined by measuring the resistance as a function of the voltage and amperage of the filament power and using the dependence of the resistivity of tungsten with temperature. The luminous power that emits the filament is calibrated with phototransistors and photodiodes patterns Siemens, photoelectric units (Lux, lx) and in unit of energy (W/m2). With the I-v characteristics of the cell, the Voc open circuit voltage and intensity of current in short circuit Isc determines the maximum electrical power supplied by the cell, which divided between the light output provides the efficiency rating conversion of light energy into electricity by the photovoltaic cell. Studied cells have an open circuit (Voc) of 4.6 V voltage, intensity of current in short circuit (Isc) of 87 mA and efficiency of 12.4% with irradiation of 399,6 W/m2. Key words: solar cells, energy efficiency measurements.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El presente trabajo muestra el desarrollo de un sistema para la medición de la potencia luminosa solar y la potencia eléctrica generada por las celdas solares de un panel fotovoltaico, con el fin de evaluar la eficiencia energética en la conversión de la energía luminosa en energía eléctrica. Para esto lo primero es calibrar la potencia luminosa que emite una lámpara de tungsteno, teniendo en cuenta la temperatura del filamento y la emitancia del tungsteno en función de la temperatura y la longitud de onda. La temperatura del filamento se determina midiendo la resistencia en función del voltaje y el amperaje de alimentación del filamento y usando la dependencia de la resistividad del tungsteno con la temperatura. La potencia luminosa que emite el filamento es calibrada con fototransistores y fotodiodos patrones Siemens, en unidades fotoeléctricas (en lux, lx) y en unidades energéticas (W/m2). Con las características I-V de la celda, el voltaje a circuito abierto Voc y la intensidad de la corriente en cortocircuito Isc se determina la potencia eléctrica máxima suministrada por la celda, la cual dividida entre la potencia luminosa proporciona el valor de la eficiencia de conversión de energía luminosa en eléctrica por la celda fotovoltaica. Las celdas estudiadas tienen un voltaje a circuito abierto (Voc) de 4,6 V, una intensidad de la corriente en cortocircuito (Isc) de 87 mA y una eficiencia de 12,4% con una irradiación de 399,6 W/m2.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[power luminous lot]]></kwd>
<kwd lng="en"><![CDATA[electric power]]></kwd>
<kwd lng="en"><![CDATA[photovoltaic panel]]></kwd>
<kwd lng="es"><![CDATA[potencia luminosa solar]]></kwd>
<kwd lng="es"><![CDATA[potencia eléctrica]]></kwd>
<kwd lng="es"><![CDATA[panel fotovoltaico]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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