<?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>1405-7743</journal-id>
<journal-title><![CDATA[Ingeniería, investigación y tecnología]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. invest. y tecnol.]]></abbrev-journal-title>
<issn>1405-7743</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Ingeniería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-77432019000300011</article-id>
<article-id pub-id-type="doi">10.22201/fi.25940732e.2019.20n3.035</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Análisis exergético convencional aplicado a una planta de poligeneración operando en cascada geotérmica]]></article-title>
<article-title xml:lang="en"><![CDATA[Conventional exergy analysis applied to a polygeneration plant operating in a geothermal cascade]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ambriz-Díaz]]></surname>
<given-names><![CDATA[Víctor M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rubio-Maya]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pacheco-Ibarra]]></surname>
<given-names><![CDATA[J. Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pastor-Martínez]]></surname>
<given-names><![CDATA[Edgar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Facultad de Ingeniería Mecánica ]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Facultad de Ingeniería Mecánica ]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Facultad de Ingeniería Mecánica ]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Facultad de Ingeniería Mecánica ]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<volume>20</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-77432019000300011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-77432019000300011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-77432019000300011&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este trabajo se presenta un análisis exergético convencional aplicado a una planta de poligeneración que utiliza energía geotérmica para producir electricidad, enfriamiento y calor útil para deshidratación. La planta de poligeneración opera mediante energía geotérmica de media entalpia y está conformada por varias tecnologías de conversión de energía que operan en tres niveles en una cascada geotérmica. El primer nivel térmico lo constituye un Ciclo de Rankine Orgánico (ORC) con el que se produce electricidad. El segundo nivel térmico está compuesto por una máquina de refrigeración por absorción mediante la que se produce un efecto de enfriamiento para conservación de productos a baja temperatura dentro de una cámara fría, así como para mantener más estable la temperatura de condensación del ORC. La energía térmica del último nivel de la cascada geotérmica se destina para operar un deshidratador. Para determinar las prestaciones energéticas del sistema, la planta de poligeneración se sometió a un análisis de exergía convencional para determinar la exergía destruida en cada componente y de toda la planta. La planta se modeló trabajando bajo parámetros operativos reales, inevitables e ideales para obtener el comportamiento termodinámico bajo diferentes criterios de eficiencia. Los resultados muestran que la planta de poligeneración operando bajo condiciones reales presenta la mayor destrucción de exergía (127.7 kW), la más baja eficiencia exergética (26.9%), y la menor producción de productos energéticos. Los resultados también muestran que teniendo en cuenta las condiciones inevitables, el rendimiento de la planta aumenta hasta alcanzar una eficiencia exergética de 29.75%. Por último, la planta de poligeneración tiene un límite de eficiencia exergética de 73%, que corresponde a la operación en condiciones ideales. Los valores obtenidos en este estudio son importantes, ya que marcan una pauta para proponer mejoras de manera individual en componentes y en la planta en general.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In this work a conventional exergy analysis applied to a polygeneration plant that uses geothermal energy to produce electricity, cooling and useful heat for dehydration is presented. The polygeneration plant operates using medium enthalpy geothermal energy and is composed by several energy conversion technologies that operate with three thermal levels in a geothermal cascade. The first thermal level includes an Organic Rankine Cycle (ORC) for electricity production. The second thermal level has an absorption refrigeration machine for preservation of agricultural products at a low temperature as well as to maintain more stable the condensation temperature of the ORC. The thermal energy of the last level of the geothermal cascade feeds a dehydrator module. To determine the energy performance of the system, the polygeneration plant was subjected to a conventional exergy analysis calculating the exergy destroyed in each component and the entire plant. The plant was modeled working under realistic, unavoidable and ideal operating parameters to obtain the thermodynamic behavior under different efficiency criteria. The results show that the polygeneration plant operating under real conditions presents the greatest destruction of exergy (127. 7 kW), the lowest exergy efficiency (26.9%), and the lowest production of energy products. The results also show that taking into account the unavoidable conditions, the performance of the plant increases up to an exergy efficiency of 29.75%. Finally, the polygeneration plant has an exergy efficiency limit of 73%, which corresponds to the operation under ideal conditions. The values obtained in this study are of vital importance since they provide information for proposing improvements individually in components and in the plant as a whole.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Análisis exergético convencional]]></kwd>
<kwd lng="es"><![CDATA[planta de poligeneración]]></kwd>
<kwd lng="es"><![CDATA[cascada geotérmica]]></kwd>
<kwd lng="es"><![CDATA[multi-generación]]></kwd>
<kwd lng="en"><![CDATA[Conventional exergy analysis]]></kwd>
<kwd lng="en"><![CDATA[polygeneration plant]]></kwd>
<kwd lng="en"><![CDATA[geothermal cascade]]></kwd>
<kwd lng="en"><![CDATA[multi-generation]]></kwd>
</kwd-group>
</article-meta>
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