<?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>2602-8492</journal-id>
<journal-title><![CDATA[Revista Técnica energía]]></journal-title>
<abbrev-journal-title><![CDATA[Revista Técnica energía]]></abbrev-journal-title>
<issn>2602-8492</issn>
<publisher>
<publisher-name><![CDATA[Operador Nacional de Electricidad CENACE]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2602-84922022000200110</article-id>
<article-id pub-id-type="doi">10.37116/revistaenergia.v19.n1.2022.524</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación del rendimiento de una bomba de calor de expansión directa asistida por energía solar mediante simulación numérica del proceso de estrangulamiento en el dispositivo de expansión]]></article-title>
<article-title xml:lang="en"><![CDATA[Performance evaluation of a direct expansion solar-assisted heat pump by numerical simulation of the throttling process in the expansion device]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Simbaña]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quitiaquez]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estupiñán]]></surname>
<given-names><![CDATA[J. .]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Toapanta]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Politécnica Salesiana  ]]></institution>
<addr-line><![CDATA[Quito ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Politécnica Salesiana  ]]></institution>
<addr-line><![CDATA[Quito ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Politécnica Salesiana  ]]></institution>
<addr-line><![CDATA[Quito ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Politécnica Salesiana  ]]></institution>
<addr-line><![CDATA[Quito ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Politécnica Salesiana  ]]></institution>
<addr-line><![CDATA[Quito ]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>19</volume>
<numero>1</numero>
<fpage>110</fpage>
<lpage>119</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_arttext&amp;pid=S2602-84922022000200110&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_abstract&amp;pid=S2602-84922022000200110&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_pdf&amp;pid=S2602-84922022000200110&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La evaluación del rendimiento de una bomba de calor de expansión directa asistida por energía solar (DX-SAHP, por sus siglas en inglés) fue analizada mediante simulación numérica del proceso de estrangulamiento en el dispositivo de expansión. Los valores experimentales de operación del sistema fueron validados mediante prueba de normalidad con 95 % de confianza. Una válvula de expansión E2V09SSF fue modelada para el análisis numérico en el módulo Fluent del software ANSYS. El mejor mallado de la válvula generó 263 524 elementos y 50 449 nodos con una métrica excelente, de 0.2334 de skewness. Las condiciones de contorno definidas fueron la temperatura, presión y velocidad del refrigerante. Se utilizaron las ecuaciones de continuidad, momento y energía, considerando un modelo k-epsilon RNG. La presión del refrigerante al salir del dispositivo de expansión obtenidos mediante simulación se comparó con valores experimentales determinados en el prototipo de un sistema DX-SAHP. La presión del refrigerante obtenida mediante simulación para un tiempo de calentamiento de 0 a 40 minutos fue de 161.61, 186.50 y 238.33 kPa. El error absoluto entre la presión experimental y simulada fue de 4.07 kPa, mientras que el error relativo fue inferior a 2 %.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The performance evaluation of a direct expansion solar-assisted heat pump (DX-SAHP) was analyzed using numerical simulation about the throttling process in the expansion device. The experimental system operation parameters were validated by normality test with 95 % confidence. An E2V09SSF expansion valve was modeled for numerical analysis in the ANSYS software Fluent module. The best meshing of the valve generated 263 524 elements and 50 449 nodes with an excellent skewness metric of 0.2334. Refrigerant temperature and pressure were defined as boundary conditions at valve inlet, besides its velocity. Continuity, momentum and energy equations were used, considering a k-epsilon RNG model. The pressure values of the refrigerant at the expansion device outlet, obtained by simulation, were compared to experimental values that were determined in the DX-SAHP prototype system. The refrigerant pressure, obtained by simulation for a heating time of 0 to 40 minutes, was 161.61, 186.50 and 238.33 kPa. The absolute error between the experimental and simulated pressure was 4.07 kPa, while the relative error was less than 2 %.]]></p></abstract>
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