Now showing items 1-20 of 87

Administración por valores: Estrategia de mejoramiento del clima organizacional en las empresas

Acevedo Peñaloza, Carlos Humberto; GOMEZ SANTOS, PATRICIA; VIDAL TOVAR, CARLOS RAMÓN; Ureña Villamizar, Yan Carlos (Revista EspaciosCaracas, Venezuela, 2018)

Se presentan a continuación los resultados de la investigación sobre la Administración por Valores como estrategia de mejoramiento del clima organizacional empresarial en organizaciones localizadas en la ciudad de Valledupar, ...
Analysis and optimization for the process of glass tempering using autoclave

Acevedo Peñaloza, Carlos Humberto; VALENCIA OCHOA, GUILLERMO ELIECER; CARDENAS ESCORCIA, YULINETH DEL CARMEN (Journal of Physics: Conference SeriesEstados Unidos, 2018-12-07)

A mathematical analysis of the glass tempering process was carried out using an autoclave, varying the operating parameters of the system. It was found that the process time can be reduced by up to 3.23% by changing the ...
Analysis of research trends in biodiesel as fuel during last decade

Valencia Ochoa, Guillermo Eliecer; Acevedo Peñaloza, Carlos Humberto; Duarte Forero, Jorge; Mendoza-Casseres, Daniel; Obregon, Luis (International Journal of Applied Engineering ResearchIndia, 2018)

This paper presents a bibliometric study focused on the research carried out in the last 11 years on biodiesel as an alternative fuel. Tools such as HistCite were used to manage metadata found using the Web of Science ...
Análisis de falla por fatiga en el eje conducido de la bomba Hillman 250b MTB para el transporte de crudo

García León, Ricardo Andres; Espinel Blanco, Edwin; Pérez, Eduar (Revista Colombiana de Tecnologías de AvanzadaColombia, 2019)

El objetivo del presente estudio, está centrado en localizar las causas que originaron la falla por fatiga en el eje conductor de la bomba Hillman 250B MTB doble tornillo para el despacho de crudo. El eje tuvo fractura ...
Análisis termodinámico y económico de sistemas de recuperación de calor residual de un motor de generación mediante tecnologías de ORC

Acevedo Peñaloza, Carlos Humberto (Universidad Francisco de Paula SantanderCúcuta, Norte de Santander, 2020-02-02)

Debido a los problemas que se han presentado por el uso excesivo de las fuentes de energía renovables se hace necesario investigar e incluir las nuevas alternativas energéticas, sin embargo, su implementación es costosa ...
Análisis térmico, modelamiento matemático y simulación de un reactor de agitación discontinuo para volumen específico

Rolon, Humberto; Acevedo Peñaloza, Carlos Humberto; Villamizar González, Yesenia (Revista UIS IngenieríasColombia, 2019-01-01)

El presente trabajo expone el análisis térmico y el modelamiento matemático de un reactor de agitación discontinuo. Se implementó una fase de adquisición de datos en cuanto alfuncionamiento y la utilidad de los reactores ...
The architecture on land and its construction techniques, millenary tradition that is reborn

Hurtado-Figueroa, Oswaldo; Cárdenas-Gutiérrez, Javier Alfonso; Acevedo Peñaloza, Carlos Humberto (Contemporary Engineering SciencesBulgaria, 2018-08-30)

In the context of sustainable development, the use of materials of low environmental impact in the activities inherent to the construction of houses plays an important role when it comes to reducing waste pollution. The ...
Articulation of environmental management in projects of non-conventional energy sources in the Caribbean Colombian region

Acevedo Peñaloza, Carlos Humberto; VALENCIA OCHOA, GUILLERMO ELIECER; CARDENAS ESCORCIA, YULINETH DEL CARMEN (Journal of Physics: Conference SeriesEstados Unidos, 2018-12-07)

This work addresses an inclusion methodology based on criteria for the implementation of non-conventional energy sources and critical environmental factors for the licensing of the same, which is applied to the case study ...
Behaviour of the contact trace in a cam-follower system when the displacement law has been designed using bézier curves

Acevedo Peñaloza, Carlos Humberto; Henao Leon, Diego; Rojas Suárez, Jhan Piero (Contemporary Engineering SciencesBulgaria, 2018-11-06)

The study shows the distribution of the contact trace in a cam - follower mechanism in which the Bézier curves of degrees 5, 7 and 9 have been used for the design of displacement of the follower. The equations that ...
A bibliometric analysis environmental impact assessment literature: An expanding and shifting focus

Coba Salcedo, Milton Fabian; Valencia Ochoa, Guillermo; Acevedo Peñaloza, Carlos Humberto (Chemical Engineering TransactionsItalia, 2018-09)

A bibliometric analysis of the literature on the subject of Environmental Impact Assessment for a period from 2007 to 2015 was carried out under an expanding and shifting focus. For this purpose, the metadata used ...
Bibliometric analysis of the thermal storage systems research in the last ten years

Peralta-Ruiz, Yeimmy; Acevedo Peñaloza, Carlos Humberto; Valencia Ochoa, Guillermo (International Journal of ChemTech ResearchIndia, 2018)

In this research we analyze the state of the art of the technological developments that are being presented by the scientific community to mitigate the strong environmental changes with renewable energies. The results ...
Bibliometric science indicators applied to environmental impacts research

Peralta-Ruiz, Yeimmy; Acevedo Peñaloza, Carlos Humberto; Valencia Ochoa, Guillermo (Contemporary Engineering SciencesBulgaria, 2018-08-01)

The growth and development of research on environmental impacts in terms of publications such as the Web of Science sample are analyzed during the period 2007-2018 using HistCite to learn about a global ranking, citations, ...
Bibliometric study of state observer research applied to internal combustion engine

VALENCIA OCHOA, GUILLERMO ELIECER; Acevedo Peñaloza, Carlos Humberto; CARDENAS ESCORCIA, YULINETH DEL CARMEN (Journal of Physics: Conference SeriesEstados Unidos, 2018-12-07)

The present study was conducted to evaluate the worldwide scientific production related to observers applied to internal combustion engines by taking information from the Web of Science (WoS) database and taking the papers ...
Brake discs: A technological review from its analysis and assessment

García León, Ricardo Andres; Florez, Eder; Suárez Quiñones, Alvaro Enrique (Informador TécnicoColombia, 2019-10-31)

Braking systems are undoubtedly the most important component for road safety, since it determines the total or partial stop of a vehicle and, therefore, guarantees the physical integrity of passengers. Normally, the front ...
Caracterización de la tasa de liberación de calor en los cilindros de un motor de generación a gas natural de 2 MW

Valencia-Ochoa, Guillermo; Duarte Forero, Jorge; Acevedo Peñaloza, Carlos Humberto (AiBi Revista de Investigación, Administración e IngenieríaColombia, 2020-01-01)

Desarrollar modelos matemáticos para los motores de generación de energía más confiables que permitan proponer un uso eficiente de los combustibles y aumentar la eficiencia de conversión energética, ...
Caracterización Térmica de mezclas de arcillas utilizadas en la fabricación de productos de mampostería para la contrucción

García León, Ricardo Andrés; Flórez Solano, Eder; Acevedo Peñaloza, Carlos (Revista Colombiana De Tecnologías De Avanzada ISSNColombia, 2018)

Actualmente en Norte de Santander existe gran variedad de yacimientos naturales que se pueden utilizar para fabricar productos de mampostería para la construcción como lo son bloques, tejas, ladrillos, baldosas, entre ...
Caracterización térmica de mezclas de arcillas utilizadas en la fabricación de productos de mampostería para la construcción

García León, Ricardo Andres; Flórez Solano, Eder; Acevedo Peñaloza, Carlos Humberto (Revista Colombiana de Tecnologías de AvanzadaColombia, 2018)

Actualmente en Norte de Santander existe gran variedad de yacimientos naturales que se pueden utilizar para fabricar productos de mampostería para la construcción como lo son bloques, ...
CFD performance analysis for Darrieus Hydrokinetic Turbine

Rolong Ortiz, Humberto; Acevedo Peñaloza, Carlos Humberto; Valencia, Guillermo (Journal of Engineering Science and Technology ReviewGrecia, 2019-04-10)

This work proposes the analysis of the behavior of a Darrieus type hydrokinetic turbine, starting from the mathematical model that allows to delimit the operation system, linking all the variables present in the phenomenon, ...
CFD simulation of HPAM EOR solutions mechanical degradation by restrictions in turbulent flow

Herrera Quintero, Julia Jineth ; Prada, Luis; Maya, Gustavo; VERGEL, JOSE; Castro Garcia, Ruben Hernan; QUINTERO, HENDERSON; Jiménez, Robinson; Pérez, Eduar (CT&F - Ciencia, Tecnología y FuturoColombia, 2020-12-17)

Polymer flooding is a widely used enhanced oil recovery (EOR) technology. The purpose of the polymer is to increase water viscosity to improve reservoir sweep efficiency. However, mechanical elements of the polymer injection ...
Clay surface characteristics using atomic force microscopy

Acevedo Peñaloza, Carlos Humberto; Florez, Eder; García León, Ricardo Andres (Revista Facultad de Ingeniería Universidad de AntioquiaColombia, 2018-06-07)

The first component for the manufacture of masonry products used in construction is clay, which provides the plasticity that facilitates the molding and handling of the product. The second component is the feldspar in form ...

Envíos recientes

Administración por valores: Estrategia de mejoramiento del clima organizacional en las empresas
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Acevedo Peñaloza, Carlos Humberto | 2018

Se presentan a continuación los resultados de la investigación sobre la Administración por Valores como estrategia de mejoramiento del clima organizacional empresarial en organizaciones localizadas en la ciudad de Valledupar, cuyo objetivo general fue establecer un programa de Administración por Valores como estrategia de mejoramiento del clima organizacional empresarial para lo cual se identificó la situación actual del clima organizacional que presenta la empresa; se determinó los valores que harán parte del programa de Administración por Valores y diseñan estrategias para la implementación de un programa de Administración por Valores. Para lo anterior se desarrolló un diagnóstico de la situación actual del clima organizacional; se establecen las debilidades, fortalezas, amenazas y oportunidades para el diseño e implementación del programa de Administración por Valores. De acuerdo a lo anterior, Existe la necesidad de formar y crear estrategias de compensación, distintas a las económicas, dentro de las empresas, y que se convierten en elementos motivadores y potenciadores de buen clima organizacional; la implementación del programa Administración por valores, permite generar una mejor actitud de parte de todo el personal de las empresas, desde los administrativos, operarios y comerciales, hacia el trabajo y el relacionamiento entre ellos. Además, en las organizaciones se ha generado una cultura de liderazgo y trabajo en equipo mucho más dinámica y espontánea, permitiendo el empoderamiento y la pertenencia hacia la organización.

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Analysis and optimization for the process of glass tempering using autoclave
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Acevedo Peñaloza, Carlos Humberto | 2018-12-07

A mathematical analysis of the glass tempering process was carried out using an autoclave, varying the operating parameters of the system. It was found that the process time can be reduced by up to 3.23% by changing the resistance to 15Ω, but increasing the resistance more than this value would mean compromising the quality of the final product. Thus, it is advisable to make variations of the resistance between 10Ω and15Ω, which will allow the optimization of the process time and pressures without affecting the quality of the result.

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Analysis of research trends in biodiesel as fuel during last decade
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Valencia Ochoa, Guillermo Eliecer | 2018

This paper presents a bibliometric study focused on the research carried out in the last 11 years on biodiesel as an alternative fuel. Tools such as HistCite were used to manage metadata found using the Web of Science search engine, including author names, titles, abstracts, publication dates, document types, addresses and references cited. In addition, the impact factor and H index of the journals they published were taken into account to analyze the reliability of the research. The study showed a tendency to increase over the years, from 76 publications in 2007 to a total of 2017 in 2017, an increase of 185.71%. Likewise, it was concluded, among other things, that of the 1423 documents obtained to carry out the study, 84.7% were scientific articles, being the majority of the works carried out, followed by the revisions that reached 5.8%. And that magazines such as FUEL, ENERGY & FUEL and ENERGY were among those that contributed the most to this research. In addition, it was demonstrated that the countries most interested in this technology are India, USA and Peoples R China, being these the ones with more than 254, 222 and 119 publications respectively.

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Análisis de falla por fatiga en el eje conducido de la bomba Hillman 250b MTB para el transporte de crudo
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García León, Ricardo Andres | 2019

El objetivo del presente estudio, está centrado en localizar las causas que originaron la falla por fatiga en el eje conductor de la bomba Hillman 250B MTB doble tornillo para el despacho de crudo. El eje tuvo fractura en el cuñero cerca de la zona de cambio de sección debido a malos procedimientos ingenieriles sin tener en cuenta los cálculos de diseño. Por esta razón, se realizó un análisis de causa raíz con el cual se demostró que el cuñero estaba mal diseñado, y de esta manera poder establecer las variables que influyeron en la falla. Luego de obtener esta información, se procedió a realizar el análisis del diseño óptimo del cuñero, igualmente el rediseño del concentrador de esfuerzo para evitar futuras fallas, mediante un análisis de fatiga, fuerzas pares y diagramas de esfuerzos cortante para materiales dúctiles del cual estaba fabricado, con lo que se determinó la vida del eje. Además, se efectuó el modelamiento por medio de elementos finitos para determinar el estado de los esfuerzos. Asimismo con los resultados obtenidos poder presentar los planes de acción para evitar futuras fallas tempranas en los sistemas de bombeo principales para el despacho de crudo en las empresas del sector petrolero.

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Análisis termodinámico y económico de sistemas de recuperación de calor residual de un motor de generación mediante tecnologías de ORC
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Acevedo Peñaloza, Carlos Humberto | 2020-02-02

Debido a los problemas que se han presentado por el uso excesivo de las fuentes de energía renovables se hace necesario investigar e incluir las nuevas alternativas energéticas, sin embargo, su implementación es costosa por lo cual es de vital importancia la investigación en la mejora de los mismo. Dentro de estos, se destaca el uso de sistema de recuperación de calor residual debido a la fácil adaptación que poseen, sin embargo, el uso racional de estos sistemas no garantiza un desarrollo amigable y/o sostenible medio ambientalmente. Este trabajo presenta un análisis exergo ambiental avanzado a un sistema de recuperación de calor ORC acoplado a un motor de combustión interna con evaporación indirecta con el fin de determinar la magnitud de cada componente de la planta y de esta manera identificar el potencial real de mejora. La exergía destruida es divida en 4 categorías: endógeno, exógeno, evitable e inevitable a su vez que son dividas en endógeno evitable e inevitable y exógeno evitable e inevitable. Con el fin de hacer el sistema mucho más eficiente se aplica un análisis de sensibilidad a las variables con mayor influencia en el sistema para denotar las oportunidades de mejora desde el punto de vista ambiental. Por último, un análisis de ciclo de vida es aplicado para determinar los impactos y dimensiones ambientales a lo largo de la vida útil del sistema.

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Análisis térmico, modelamiento matemático y simulación de un reactor de agitación discontinuo para volumen específico
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Rolon, Humberto | 2019-01-01

El presente trabajo expone el análisis térmico y el modelamiento matemático de un reactor de agitación discontinuo. Se implementó una fase de adquisición de datos en cuanto alfuncionamiento y la utilidad de los reactores de agitación. Posteriormente, se aplicaron los conceptos de termodinámica, mecánica de fluidos, transferencia de calor y transporte de materia,para realizar el respectivo análisis térmico,y así determinar la energía contenida y transferida en los fluidos utilizados.Por último, se dedujoun modelo matemático en el softwareEES,para comprobar su comportamiento,teniendo en cuenta las variables operativas sometidas a diversos tipos de fluidos. Además, se simuló el entorno físico-químico del reactor,para validar los datos calculados y compararlos con los valores experimentales, relacionando la geometría del equipo con las condiciones de trabajoy las especificaciones del producto final.

LEER
The architecture on land and its construction techniques, millenary tradition that is reborn
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Hurtado-Figueroa, Oswaldo | 2018-08-30

In the context of sustainable development, the use of materials of low environmental impact in the activities inherent to the construction of houses plays an important role when it comes to reducing waste pollution. The alternative materials to be used in the various construction processes, besides being totally renewable, they must be reusable, available locally and have little or no energy expenditure in its extraction, preparation and application. The Bio resources or Eco materials meet these requirements, of which land as ancestral material used in millenary construction techniques, it becomes the most feasible alternative for its use as a construction material to replace the conventional ones. The main objective is the literary review of articles published in reliable databases, whose research topic was based on the analysis and use of land and natural materials for application in housing construction. The articles were categorized, analyzed and integrated into a synthesized structure to extract the important aspects in the thematic introduction, the constructive techniques, the results of the processes carried out and finally, the conclusions on the constructive implementation of the elements studied. In this way it offers information of interest to people who want to delve into the subject investigated.

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Articulation of environmental management in projects of non-conventional energy sources in the Caribbean Colombian region
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Acevedo Peñaloza, Carlos Humberto | 2018-12-07

This work addresses an inclusion methodology based on criteria for the implementation of non-conventional energy sources and critical environmental factors for the licensing of the same, which is applied to the case study installation of wind turbines in seawater desalination plants in Isla Grande - Bolívar, this study was carried out taking into account field visits, and previous studies, where its main researchers and observers coincide with the authors of this article, the proposal includes aspects that involve the matrix of project stakeholders, work is completed with the qualitative and quantitative analysis of the factors of greater environmental impact, within the obtained results it is emphasized that the greatest impact that this project makes to 170 habitants of Isla Grande Bolivar is the changes of the current and/or potential use of soil, soil contamination and displacement of birds, In mammal, reptile and amphibian communities, it is suggested that Environmental Management Plans (PMA) be implemented, such as programs for conservation management, soil resource management, and vegetation and wildlife management programs, allowing for effective licensing of the project benefiting equally the interest group.

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Behaviour of the contact trace in a cam-follower system when the displacement law has been designed using bézier curves
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Acevedo Peñaloza, Carlos Humberto | 2018-11-06

The study shows the distribution of the contact trace in a cam - follower mechanism in which the Bézier curves of degrees 5, 7 and 9 have been used for the design of displacement of the follower. The equations that describe the movement of the follower and its derivatives are presented, the expressions are formulated for the contact trace, the force exerted on the mechanical assembly are formulated and the results obtained are presented in a model mechanism.

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A bibliometric analysis environmental impact assessment literature: An expanding and shifting focus
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Coba Salcedo, Milton Fabian | 2018-09

A bibliometric analysis of the literature on the subject of Environmental Impact Assessment for a period from 2007 to 2015 was carried out under an expanding and shifting focus. For this purpose, the metadata used was obtained through web of science and analyzed with the Histcite software. The search identified a total of 683 publications related to Environmental Impact Assessment in the period studied, allowing to study the main journals involved in this topic. The country with the highest number of publications was the United States with 88 papers on the subject. On the other hand, the journal with the greatest influence on the subject was Environmental Impact Assessment Review, with 1090 citations, representing the 8.7% of the total citations between 2007 and 2015. Analyzing the evolution of publications per year, there was an increase in research activity on the subject between 2012 and 2014, amounting to 45.6% in those years. According to the type of document from the 683 publications, the 84.6% (578) were articles and 4.4% reviews. These results obtained show an increase in the interest of researchers in the environmental impact assessment topic, which is in line with the climate changes presented on the planet and the global concern to reduce the effects of greenhouse gas, and the better use of natural resources.

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Bibliometric analysis of the thermal storage systems research in the last ten years
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Peralta-Ruiz, Yeimmy | 2018

In this research we analyze the state of the art of the technological developments that are being presented by the scientific community to mitigate the strong environmental changes with renewable energies. The results obtained by the bibliometric techniques in the period 2007-2018 show that in the 1900 published articles the People's Republic of China presents the highest volume of 32.3% of the total publications, showing a strong influence on the development of energy storage technologies and the availability of materials. The results presented in this article allow us to evaluate the development of researchers in this alternative of energy storage as a replacement to the distribution that is done with traditional methods.

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Bibliometric science indicators applied to environmental impacts research
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Peralta-Ruiz, Yeimmy | 2018-08-01

The growth and development of research on environmental impacts in terms of publications such as the Web of Science sample are analyzed during the period 2007-2018 using HistCite to learn about a global ranking, citations, article impact, keywords and research trends in this area. The research trend increased during the years 2014 and 2017. The United States is the country with the highest number of publications. The Journal of Cleaner Production is the journal with the highest number of publications, along with Science of Total Environment and the Environmental impact assemble review.

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Bibliometric study of state observer research applied to internal combustion engine
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VALENCIA OCHOA, GUILLERMO ELIECER | 2018-12-07

The present study was conducted to evaluate the worldwide scientific production related to observers applied to internal combustion engines by taking information from the Web of Science (WoS) database and taking the papers published between 2001 − 2017. The works found are mostly research articles with a total of 130 articles equivalent to 97.01%, of the 134 articles studied, and it was also noted that the production of this type of work increased in the last 3 years, with the maximum value in 2015 being 22 articles, even in those 3 years, the greatest number of references were also found. The United States is the country with the highest number of publications with 42 followed by People´s Republic of China, France and UK with 41, 11 and 11 respectively. Although the USA is the country with the highest number of publications, China has consolidated its position as the country with the highest number of publications and citations in the last 3 years. However, within the top 10 institutes with the highest number of publications, 4 of them are from the United States, among which Ohio State University stands out as the institute with the highest number of publications with 16 (11.9%). On the other hand, the most commonly used words in the documents were observer (91), control (47), engine (47), based (42) and estimation (41).

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Brake discs: A technological review from its analysis and assessment
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García León, Ricardo Andres | 2019-10-31

Braking systems are undoubtedly the most important component for road safety, since it determines the total or partial stop of a vehicle and, therefore, guarantees the physical integrity of passengers. Normally, the front brake discs and the remaining percentage absorb 70% of the kinetic energy produced within a vehicle by the rear brake discs, which tend to have the formof a drum brake. These systems benefit from friction to stop a moving vehicle, under the umbrella of hydraulic pressure that pushes the brake pads against the iron-cast disk. In this document, concepts of famous authors around the world on analysis and evaluation of brake discs are provided, which are carried out using a descriptive methodology and an estimation of the characteristics of the brake disc. The review is carried out in computer assisted design through several existing CAD software in the industry, as the main methodology applied to the development of certain research projects, where different geometric characteristics of the brake discs are considered, as well as problems related to wear and corrosion. This research project has shown that it is vital to incorporate existing computer assisted design software to predict performance, improve components and optimize the functionality of the brake system. In this way, road traffic safety and systems efficiency are achieved, which are a matter of great importance for the industry. It is vital to analyze brake systems through Finite Element Analysis (FEA), with the intention of achieving a broader vision of its performance, since the information collected reveals that the geometric characteristics of the brake and cooling ducts influence the heat dissipation. It depends on the form, the type of material and the application, the heat generated between the pad and the brake. Therefore, the heat is dissipated rapidly according to the analysis performed mathematically by the researchers, which are compared with the made in computer assisted design software.

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Caracterización de la tasa de liberación de calor en los cilindros de un motor de generación a gas natural de 2 MW
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Valencia-Ochoa, Guillermo | 2020-01-01

Desarrollar modelos matemáticos para los motores de generación de energía más confiables que permitan proponer un uso eficiente de los combustibles y aumentar la eficiencia de conversión energética, se ha convertido en uno de los principales objetivos de los trabajos de investigación en el área. Con el fin de estudiar el fenómeno liberación de calor en los cilindros de un motor a gas natural J612 Jenbacher de 2 MW a partir de variables medias disponibles enregistros operacionales, se ha propuesto un modelo semifísico a partir de balances de masa, energía, ecuaciones constitutivas y regresiones estadísticas. Los resultados muestran que a partir del modelo propuesto del calor rechazado con un coeficiente de determinación de 0.99, el permiten alcanzar un error relativo máximo de 2% en modo isla y del 4% operando en red para la estimación de la temperatura de los gases a las salidas de los cilindros. Así mismo, el modelo permite determinar la fracción de calor perdido en los cilindros en función de la energía aportada por el gas natural.

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Caracterización Térmica de mezclas de arcillas utilizadas en la fabricación de productos de mampostería para la contrucción
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García León, Ricardo Andrés | 2018

Actualmente en Norte de Santander existe gran variedad de yacimientos naturales que se pueden utilizar para fabricar productos de mampostería para la construcción como lo son bloques, tejas, ladrillos, baldosas, entre otros; pero las empresas fabricantes obtienen muchos desperdicios debido a la falta de análisis tecnológicos de la materia prima para pronosticar el comportamiento de las pastas cerámicas y lograr mejorar la calidad del producto final. En el presente trabajo se realizó las caracterizaciones térmicas de dos mezclas de arcillas (m7 y m8) encontradas experimentalmente utilizando el método de moldeo de extrusión y en polvo para la fabricación de bloques H-10 tomando como muestra la materia prima (arcilla) de una empresa dedicada a la fabricación de bloques H-10 en Ocaña, Norte de Santander. El desarrollo de la investigación se llevó a cabo mediante la ejecución de ensayos térmicos a las muestras de arcillas con los que se determinaron los porcentajes pérdida de peso respecto a las temperaturas obtenidas en un diagrama con las curvas de ATD y ATG. Los resultados obtenidos demuestran que las mezcla m7 encontrada experimentalmente presenta mejores características en el proceso de cocción por lo que se estableció una curva de cocción óptima para la fabricación del bloque H-10 teniendo en cuenta las especificaciones del proceso productivo y la materia prima, con lo que se espera mejorar la calidad del producto final cumpliendo las especificaciones de las normas actuales vigentes. Es indispensable caracterizar las arcillas para optimizar la pasta de producción y evitar imperfecciones en el producto final (Bloque H-10) con lo que evidentemente se mejoraran los recursos ambientales y económicos de la empresa.

LEER
Caracterización térmica de mezclas de arcillas utilizadas en la fabricación de productos de mampostería para la construcción
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García León, Ricardo Andres | 2018

Actualmente en Norte de Santander existe gran variedad de yacimientos naturales que se pueden utilizar para fabricar productos de mampostería para la construcción como lo son bloques, tejas,ladrillos, baldosas, entre otros; pero las empresas fabricantes obtienen muchos desperdicios debido a la falta de análisis tecnológicos de la materia prima para pronosticar el comportamiento de las pastas cerámicas y lograr mejorar la calidad del productofinal. En el presente trabajo se realizó las caracterizaciones térmicas de dos mezclas de arcillas (m7 y m8) encontradas experimentalmente utilizando el método de moldeo de extrusión y en polvo para la fabricación de bloques H-10 tomando como muestra la materia prima (arcilla) de una empresa dedicada a la fabricación de bloques H-10 en Ocaña, Norte de Santander. El desarrollo de la investigación se llevó a cabo mediante la ejecución de ensayos térmicos a las muestras de arcillas con los que se determinaronlos porcentajes pérdida de peso respecto a las temperaturas obtenidas en un diagrama con las curvas de ATD y ATG. Los resultados obtenidos demuestran que las mezcla m7 encontrada experimentalmente presenta mejores características en el proceso de cocción por lo que se estableció una curva de cocción óptima para la fabricación del bloque H-10 teniendo en cuenta las especificaciones del proceso productivo y la materia prima, con lo que se espera mejorar la calidad del producto final cumpliendo las especificaciones de las normas actuales vigentes. Es indispensable caracterizar las arcillas para optimizar la pasta de producción y evitar imperfecciones en el producto final (Bloque H-10) con lo que evidentemente se mejoraran los recursos ambientales y económicos de la empresa.

LEER
CFD performance analysis for Darrieus Hydrokinetic Turbine
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Rolong Ortiz, Humberto | 2019-04-10

This work proposes the analysis of the behavior of a Darrieus type hydrokinetic turbine, starting from the mathematical model that allows to delimit the operation system, linking all the variables present in the phenomenon, specifically the fluid properties such as density, velocity, viscosity and Reynolds number. Also considered are the geometric data of the profiles, the rope length, cross-sectional area, angle of attack of the impeller, type of profile used and speed of rotation. The initial domain data, the flow area and the boundary conditions are selected to solve the model and thus obtain the data of the individual behavior of the selected profiles. For this, the lift and drag curves are obtained over a wide range of angles of attack. After characterizing the profile, the behavior of the impeller is simulated, calculating its power coefficient and consequently its performance.

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CFD simulation of HPAM EOR solutions mechanical degradation by restrictions in turbulent flow
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Herrera Quintero, Julia Jineth | 2020-12-17

Polymer flooding is a widely used enhanced oil recovery (EOR) technology. The purpose of the polymer is to increase water viscosity to improve reservoir sweep efficiency. However, mechanical elements of the polymer injection facilities may impact the viscosity of the polymer negatively, decreasing it drastically. Mechanical degradation of the polymer occurs in case of flow restrictions with abrupt diameter changes in valves and control systems. Such flow restrictions may induce mechanical stresses along the polymer chain, which can result in its rupture. In this research, physical experiments and numerical simulations using CFD (Computational Fluid Dynamics) were used to propose a model for estimating the mechanical degradation for the flow of polymer solutions. This technique involves the calculation of velocity gradients, pressure drawdown, and polymer degradation of the fluid through geometry restriction. The simulations were validated through polymer injection experiments. The results show that with the greater volumetric flow and lower effective diameters, there is more mechanical degradation due to polymer shearing; nonetheless, this depends on the rheology properties inherent in each polymer in an aqueous solution. This method is suitable to estimate the mechanical degradation of the polymer solution in flooding facilities and accessories. Further, the results obtained could enhance the use of the polymer, calculating its actual mechanical degradation, minimizing it, or using it to support the development of new accessories.

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Clay surface characteristics using atomic force microscopy
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Acevedo Peñaloza, Carlos Humberto | 2018-06-07

The first component for the manufacture of masonry products used in construction is clay, which provides the plasticity that facilitates the molding and handling of the product. The second component is the feldspar in form of alumina (Al2O3) which is used as flux. The third one is silica (SiO2) which is used as a filling material and stabilizer. These elements are determined by chemical composition using fluorescence analysis or X-ray diffraction, which is the basis of the modern classification of minerals. Thereby, the main objective of this research is to study the surface characteristics of clay samples from an industrial company producing H-10 blocks in the region of Norte de Santander, by studying the surfaces of the samples selected through the analysis by Atomic Force Microscopy, in order to compare the results with those found in the literature, and at the same time taking into account the chemical elements in their highest composition. The results show that this is a technique that allows the identification of clay components, thus validating what has been found in physical and chemical analysis, expecting to provide a scientific contribution by AFM, because there is little information related to the characterization topography of clay materials.

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