<?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>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2017000600553</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[The universal optimal relations of the allocation and effectiveness of the heat exchangers for power plants with n Carnot-like cycles]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aragón-González]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[León-Galicia]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,UAM  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>63</volume>
<numero>6</numero>
<fpage>553</fpage>
<lpage>559</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2017000600553&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2017000600553&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2017000600553&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A model of irreversible Carnot-like power plant with n Carnot-like cycles is optimized. The irreversibilities of each cycle are: finite rate heat transfer between the working fluid and the external heat sources, internal dissipation of the working fluid, and heat leak between reservoirs; is extended to two or more of this combined model. Applying the Bellman&#8217; Principle, we find the optimal recurrence relations for the allocation of the heat exchangers for thes power plants. The optimal allocation or effectiveness is determined by two design rules, applied alternatively: internal thermal conductance fixed or areas fixed. The optimal recurrence relations obtained for this combined model are invariant to the power and efficiency and to the heat transfer law.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se optimiza un modelo de planta de potencia irreversible con n ciclos tipo Carnot. Las irreversibilidades de cada uno de los ciclos son: transferencia finita de calor entre el fluido de trabajo y los depósitos de temperatura, disipación del fluido de trabajo y fuga de calor entre ambos depósitos; es extendido a dos o más de este ciclo combinado. Aplicando el Principio de Bellman, encontramos las relaciones de recurrencia óptimas para la dimensión y efectividad de los intercambiadores de calor para modelo combinado. La óptima dimensión y efectividad se determina mediante dos reglas de diseño, aplicadas alternativamente: conductancias térmicas restringidas ó área total constante. Las relaciones óptimas para la dimensión ó efectividad obtenidas para este modelo combinado son invariantes a la potencia y eficiencia y a la ley de transferencia de calor.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Irreversibilidades]]></kwd>
<kwd lng="es"><![CDATA[Carnot]]></kwd>
<kwd lng="es"><![CDATA[dimensi´on]]></kwd>
<kwd lng="es"><![CDATA[efectividad]]></kwd>
<kwd lng="es"><![CDATA[conductancia]]></kwd>
<kwd lng="es"><![CDATA[área]]></kwd>
<kwd lng="es"><![CDATA[óptima]]></kwd>
<kwd lng="es"><![CDATA[01.40G]]></kwd>
<kwd lng="es"><![CDATA[05.70.-a]]></kwd>
<kwd lng="es"><![CDATA[64.70.F]]></kwd>
<kwd lng="en"><![CDATA[Irreversibilities]]></kwd>
<kwd lng="en"><![CDATA[Carnot]]></kwd>
<kwd lng="en"><![CDATA[allocation]]></kwd>
<kwd lng="en"><![CDATA[conductance]]></kwd>
<kwd lng="en"><![CDATA[effectiveness]]></kwd>
<kwd lng="en"><![CDATA[area]]></kwd>
<kwd lng="en"><![CDATA[optimal]]></kwd>
<kwd lng="en"><![CDATA[01.40G]]></kwd>
<kwd lng="en"><![CDATA[05.70.-a]]></kwd>
<kwd lng="en"><![CDATA[64.70.F]]></kwd>
</kwd-group>
</article-meta>
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