<?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>0123-3033</journal-id>
<journal-title><![CDATA[Ingeniería y competitividad]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. compet.]]></abbrev-journal-title>
<issn>0123-3033</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ingeniería, Universidad del Valle]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0123-30332018000200009</article-id>
<article-id pub-id-type="doi">10.25100/iyc.v20i2.6752</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Improvement of transient performance and power efficiency of a variable-speed compressor refrigeration system using anti-windup control methodology]]></article-title>
<article-title xml:lang="es"><![CDATA[Mejoramiento de la respuesta transitoria y la eficiencia energética de un sistema de refrigeración con compresor de velocidad variable usando metodología anti-windup]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Piedrahita-Velásquez]]></surname>
<given-names><![CDATA[Carlos A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ciro-Velásquez]]></surname>
<given-names><![CDATA[Héctor J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arango-Tobón]]></surname>
<given-names><![CDATA[Julio C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia Facultad de Minas Departamento de Energía Eléctrica y Automática]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Colombia Facultad de Ciencias Agrarias Área Curricular de Agroingeniería y Alimentos]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>20</volume>
<numero>2</numero>
<fpage>9</fpage>
<lpage>18</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0123-30332018000200009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0123-30332018000200009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0123-30332018000200009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This paper presents a control methodology to improve the transient performance and power efficiency of a refrigeration system that uses a variable-speed compressor. The control objective is to maintain the compartment temperature at the desired setpoint, despite varying heat load conditions or disturbances. A model of the refrigeration system was obtained. The variables of interest were the compartment temperature, the evaporator superheat temperature, and the speed of the variable-speed compressor. By using simulations and real tests of the refrigeration system, it was found that a conventional implementation of a closed-loop controller causes a phenomenon known as windup, which leads to variable-speed compressor saturation and diminishes the transient performance of the refrigeration system and increases power consumption. Additionally, the evaporator superheat temperature was not significantly affected by the speed of the variable compressor, so the only option for improving the coefficient of performance of the refrigeration system was reducing the power consumption of the variable-speed compressor. An anti-windup topology for the closed-loop controller was proposed to prevent variable-speed compressor saturation. Simulations and tests of the refrigeration system showed an important improvement of the transient performance and power efficiency of the refrigeration system.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Este artículo presenta una metodología de control para mejorar el comportamiento transitorio y la eficiencia energética de un sistema de refrigeración que utiliza un compresor de velocidad variable. El objetivo de control es mantener la temperatura del compartimento en el punto de ajuste deseado, a pesar de las condiciones variables de carga térmica o las perturbaciones. Se obtuvo un modelo del sistema de refrigeración. Las variables de interés fueron la temperatura del compartimento, la temperatura del sobrecalentamiento del evaporador y la velocidad del compresor de velocidad variable. Mediante el uso de simulaciones y pruebas reales del sistema de refrigeración, se encontró que una implementación convencional de un controlador de lazo cerrado causa un fenómeno conocido como "windup", que conduce a la saturación del compresor de velocidad variable y disminuye el rendimiento transitorio del sistema de refrigeración y aumenta el consumo de energía. Además, la temperatura del sobrecalentamiento del evaporador no se vio significativamente afectada por la velocidad del compresor variable, por lo que la única opción para mejorar el coeficiente de rendimiento del sistema de refrigeración fue la reducción del consumo de energía del compresor de velocidad variable. Se propuso una topología &#8220;anti-windup&#8221; para el controlador de lazo cerrado para evitar la saturación del compresor de velocidad variable. Las simulaciones y pruebas del sistema de refrigeración mostraron una mejora importante del comportamiento transitorio y un ahorro del 10,52% en el consumo de energía.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[refrigeration system]]></kwd>
<kwd lng="en"><![CDATA[variable-speed compressor]]></kwd>
<kwd lng="en"><![CDATA[anti-windup topology]]></kwd>
<kwd lng="en"><![CDATA[closed-loop control system]]></kwd>
<kwd lng="es"><![CDATA[sistema de refrigeración]]></kwd>
<kwd lng="es"><![CDATA[compresor de velocidad variable]]></kwd>
<kwd lng="es"><![CDATA[topología anti-windup]]></kwd>
<kwd lng="es"><![CDATA[control en lazo cerrado]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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