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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 ...
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 ...
Computational fluid dynamics analysis of combined cycle power plant heat exchanger with OpenFOAM® software

Cárdenas-Gutiérrez, Javier Alfonso; Acevedo Peñaloza, Carlos Humberto; Orjuela Abril, Martha Sofia (International Review on Modelling and SimulationsItalia, 2020-10)

The heat exchangers application in combined cycle power plants is a key aspect in the thermal and fluid mechanics sciences due to their elevated functionality in industrial processes related to the quality and the efficiency ...
Determination of the theoretical stress concentration factor in structural flat plates with two holes subjected to bending loads

Acevedo Peñaloza, Carlos Humberto; Rojas Suárez, Jhan Piero; Espinel Blanco, Edwin (Contemporary Engineering SciencesBulgaria, 2018-11-22)

Numerous research works have studied the stress distribution in sections with geometric discontinuities and the relationship with the theoretical factor of stress concentration using the finite element method. These works ...
Exhaust gas heat exchanger design based on the engine backpressure and heat rate criteria

Cárdenas-Gutiérrez, Javier Alfonso; Rojas Suárez, Jhan Piero; Acevedo Peñaloza, Carlos Humberto (International Review of Mechanical EngineeringItalia, 2020-10)

The use of shell and tube heat exchangers for waste heat recovery has shown excellent results in increasing engine performance, as well as offering a large surface area for small volumes, ease of cleaning, good mechanical ...
Incidence of the lean philosophy construction in the productivity and analysis of processes in internal finishes in masonry living quarters in the construction projects: case-residential complex Callejas-Cucuta-Colombia

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

The technical supervision in the construction projects is of special importance for the correct execution of the activities, its objective is to reduce the errors that are incurred when carrying out the processes inherent ...
Influence of natural frequency on stability during milling of inconel and udimet 500

Coba Salcedo, Milton Fabian; Cárdenas-Gutiérrez, Javier Alfonso; Acevedo Peñaloza, Carlos Humberto (Contemporary Engineering SciencesBulgaria, 2018-09-18)

Chatter in the machine tools represents one of the biggest problems due to the instability in the machining process, breakage of the tool and accelerated wear of the tool and spindle or machine components in the metal ...
Substitution of natural stony material aggregates in conventional 17.5 mpa non-structural concrete mixtures by means of percentage addition of hospital solid waste

Hurtado-Figueroa, Oswaldo; Cárdenas-Gutiérrez, Javier Alfonso; Acevedo Peñaloza, Carlos Humberto (Contemporary Engineering SciencesBulgaria, 2018-11-29)

An experimental character research was carried out. A conventional concrete mixture was made with the mechanical resistance to compression of 17.5 Mpa. The materials used in the concrete mixture were analyzed and selected ...

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The architecture on land and its construction techniques, millenary tradition that is reborn
...
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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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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Computational fluid dynamics analysis of combined cycle power plant heat exchanger with OpenFOAM® software
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Cárdenas-Gutiérrez, Javier Alfonso | 2020-10

The heat exchangers application in combined cycle power plants is a key aspect in the thermal and fluid mechanics sciences due to their elevated functionality in industrial processes related to the quality and the efficiency in the power generation. Heat exchangers are employed in thermal processes in order to remove a significant heat flow and to maintain temperature values under different working conditions. Taking into account the above, numerical methodologies have been developed with the aim to study and analyze the heat exchanger performance based on the thermal states of its physical values in space and time. Experimental methods may be applied to create models and describe the flow behavior in function of mass flow rate, pressure, and flow temperature in different measure points of the finite volume. However, it is necessary to apply numerical methods linked to computational tools in order to generate a high flow description into the heat exchanger under real working conditions. Therefore, this paper proposes a numerical analysis of the flow transported into a heat exchanger with computational tools to predict its performance under real Combined Cycle Power Plant conditions through a virtual environment. Random number generator KEpsilon turbulence model and Eulerian – Eulerian multiphase model is coupled in a Computational Fluid Dynamics code to solve the system of the partial differential equations which describes the flow behavior and heat transfer into the heat exchanger, and numerical results have been compared against the experimental model in order to verify the flow prediction of the simulation methodology employed in this particular case. The good agreement reached between the models defines an inexpensive way to evaluate and optimize the heat exchanger performance by means of OpenFOAM software.

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Determination of the theoretical stress concentration factor in structural flat plates with two holes subjected to bending loads
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Acevedo Peñaloza, Carlos Humberto | 2018-11-22

Numerous research works have studied the stress distribution in sections with geometric discontinuities and the relationship with the theoretical factor of stress concentration using the finite element method. These works have dealt with topics such as the influence of the length of pieces on the 𝐾�𝑡� factor in rectangular orthotropic plates; The behavior of the stress concentration factor on short shafts with section changes under bending loads; The theoretical factor of stress concentration in flat parts subjected to tension with "U" grooves; The estimation of the theoretical stress concentration factor 𝐾�𝑡� for a flat plate with two holes subjected to tension loads. Other studies have compared the stress distribution by applying three methods: elasticity theory, finite element analysis and experimental techniques. Results show that the finite element method is effective in solving the problem. The goal of this research is to determine the theoretical stress concentration factor for a flat plate with two holes subjected to bending applying the finite element method. The modeling of the plate, the application of the loads, the mesh generation and the simulation of the stress distribution were made using the software ANSYS® Workbench. Four holes with different sizes were worked and for each of them 10 different values of the distance between centers were taken. In this way the relationship between the factor 𝐾�𝑡�, the size of the holes and the distance between centers was found. This information is of great importance for the design of mechanical elements that are under these conditions.

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Exhaust gas heat exchanger design based on the engine backpressure and heat rate criteria
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Cárdenas-Gutiérrez, Javier Alfonso | 2020-10

The use of shell and tube heat exchangers for waste heat recovery has shown excellent results in increasing engine performance, as well as offering a large surface area for small volumes, ease of cleaning, good mechanical layout, and well-known design procedure. This article presents the modeling of the coupling circuit and thermo-fluid design of the heat exchangers in the thermal oil circuit in order to maximize the heat transfer of this equipment at the lowest pressure drop and acquisition cost, which is obtained with a smaller heat transfer area. The research results show the existence of optimal values for the studied system parameters, type of organic working fluid, type of heat exchangers, besides the size of the other system components, which are particular for the studied application. However, these results cannot be compared with the real projects already implemented in the industry due to their absence. It has been verified that the fluids that have showed the best performance in terms of thermal efficiency have been acetone and benzene, with an overall thermal efficiency of 17% and 15%, respectively.

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Incidence of the lean philosophy construction in the productivity and analysis of processes in internal finishes in masonry living quarters in the construction projects: case-residential complex Callejas-Cucuta-Colombia
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Hurtado-Figueroa, Oswaldo | 2018-08-30

The technical supervision in the construction projects is of special importance for the correct execution of the activities, its objective is to reduce the errors that are incurred when carrying out the processes inherent to its development. The finishes, as a final stage in the construction of homes, generate visual appeal to customers by encouraging their option of purchase. However, the costs contemplated in this stage are important in the budget. Defining an efficient work method helps improve the completion time of the activity by promoting compliance with the schedule stipulated for the project, together with the improvement of profitability for the contractor. The present work applies some tools of the Lean Construction philosophy of the two methods implemented in the application of the coating and detailing or final finishing for houses built in masonry, through continuous observation, using the balance sheet tools, the Last Planner system with the weekly schedule and lines of balance for the programming of activities. From these measurements, time-operator relationships were obtained, which sought to identify productive, contributory and noncontributory activities that affect productivity in the development of the project, reaching conclusions that maximize productivity, reducing activities that do not generate value to the Project.

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Influence of natural frequency on stability during milling of inconel and udimet 500
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Coba Salcedo, Milton Fabian | 2018-09-18

Chatter in the machine tools represents one of the biggest problems due to the instability in the machining process, breakage of the tool and accelerated wear of the tool and spindle or machine components in the metal cutting processes, such as turning, milling, boring, drilling, etc. Which translates into a poor-quality surface finish, this phenomenon consists of self-excited vibrations that are produced and maintained due to shear forces, the purpose of this article is to predict the optimal points of operation in the milling process for Ni-based Inconel and make a comparison with Ni-based Udimet 500 through observation supported by a graphical and analytical tool to generate stability lobe diagrams, a code was developed in the MATLAB® software capable of generating stability lobe diagrams for the milling operation that provides optimal operating points to avoid tool vibration, thus improving chip removal rates and increasing productivity.

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Substitution of natural stony material aggregates in conventional 17.5 mpa non-structural concrete mixtures by means of percentage addition of hospital solid waste
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Hurtado-Figueroa, Oswaldo | 2018-11-29

An experimental character research was carried out. A conventional concrete mixture was made with the mechanical resistance to compression of 17.5 Mpa. The materials used in the concrete mixture were analyzed and selected based on the parameters established in the Colombian Technical Standards and the ASTM International Standards. They were made 6 test cylinders with the mentioned concrete mixture to which, the compressive strength of the concrete was checked it, 3 of them 7 days after they were made and the rest of them 28 days later, respectively. Thereafter, their drying process by immersion, the data thrown by the tests were averaged and tabulated. The Hospital waste solid incinerated and treated by Ecosteryl machine which is located at Guayabal environmental technology park in Cucuta city was collected. The material resulting from the incineration and treatment of the hospital solid waste was selected taking only the particles equal to or less than 20mm resulting from the crushing process by Ecosteryl. With the selected Particulate material, 3 experimental mix designs were made, which 2.5, 5 and 7.5% of the total weight of the natural stone aggregates present in the conventional concrete mixture was replaced. With each experimental mixture made, 6 cylinders were tested at 7 and 28 days, a process carried out in the same way as that implemented in the conventional concrete mix for both tests and data collection and analysis. The comparative tables showed that the experimental mixture I, where 2.5% of the total weight of the aggregate of the conventional concrete mixture was replaced, was the one that obtained the highest compressive strength surpassing the result of the conventional concrete mixture.

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Listar Transporte y Obras Civiles - GITOC por autor "1f12a99f8d5bcc67d1eb10c7c07c76a3"

The architecture on land and its construction techniques, millenary tradition that is reborn

Behaviour of the contact trace in a cam-follower system when the displacement law has been designed using bézier curves

Computational fluid dynamics analysis of combined cycle power plant heat exchanger with OpenFOAM® software

Determination of the theoretical stress concentration factor in structural flat plates with two holes subjected to bending loads

Exhaust gas heat exchanger design based on the engine backpressure and heat rate criteria

Incidence of the lean philosophy construction in the productivity and analysis of processes in internal finishes in masonry living quarters in the construction projects: case-residential complex Callejas-Cucuta-Colombia

Influence of natural frequency on stability during milling of inconel and udimet 500

Substitution of natural stony material aggregates in conventional 17.5 mpa non-structural concrete mixtures by means of percentage addition of hospital solid waste

Envíos recientes

The architecture on land and its construction techniques, millenary tradition that is reborn

Behaviour of the contact trace in a cam-follower system when the displacement law has been designed using bézier curves

Computational fluid dynamics analysis of combined cycle power plant heat exchanger with OpenFOAM® software

Determination of the theoretical stress concentration factor in structural flat plates with two holes subjected to bending loads

Exhaust gas heat exchanger design based on the engine backpressure and heat rate criteria

Incidence of the lean philosophy construction in the productivity and analysis of processes in internal finishes in masonry living quarters in the construction projects: case-residential complex Callejas-Cucuta-Colombia

Influence of natural frequency on stability during milling of inconel and udimet 500

Substitution of natural stony material aggregates in conventional 17.5 mpa non-structural concrete mixtures by means of percentage addition of hospital solid waste

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Listar Transporte y Obras Civiles - GITOC por autor "1f12a99f8d5bcc67d1eb10c7c07c76a3"

The architecture on land and its construction techniques, millenary tradition that is reborn ﻿

Behaviour of the contact trace in a cam-follower system when the displacement law has been designed using bézier curves ﻿

Computational fluid dynamics analysis of combined cycle power plant heat exchanger with OpenFOAM® software ﻿

Determination of the theoretical stress concentration factor in structural flat plates with two holes subjected to bending loads ﻿

Exhaust gas heat exchanger design based on the engine backpressure and heat rate criteria ﻿

Incidence of the lean philosophy construction in the productivity and analysis of processes in internal finishes in masonry living quarters in the construction projects: case-residential complex Callejas-Cucuta-Colombia ﻿

Influence of natural frequency on stability during milling of inconel and udimet 500 ﻿

Substitution of natural stony material aggregates in conventional 17.5 mpa non-structural concrete mixtures by means of percentage addition of hospital solid waste ﻿

Envíos recientes

The architecture on land and its construction techniques, millenary tradition that is reborn

Behaviour of the contact trace in a cam-follower system when the displacement law has been designed using bézier curves

Computational fluid dynamics analysis of combined cycle power plant heat exchanger with OpenFOAM® software

Determination of the theoretical stress concentration factor in structural flat plates with two holes subjected to bending loads

Exhaust gas heat exchanger design based on the engine backpressure and heat rate criteria

Incidence of the lean philosophy construction in the productivity and analysis of processes in internal finishes in masonry living quarters in the construction projects: case-residential complex Callejas-Cucuta-Colombia

Influence of natural frequency on stability during milling of inconel and udimet 500

Substitution of natural stony material aggregates in conventional 17.5 mpa non-structural concrete mixtures by means of percentage addition of hospital solid waste

Portales Institucionales

The architecture on land and its construction techniques, millenary tradition that is reborn

Behaviour of the contact trace in a cam-follower system when the displacement law has been designed using bézier curves

Computational fluid dynamics analysis of combined cycle power plant heat exchanger with OpenFOAM® software

Determination of the theoretical stress concentration factor in structural flat plates with two holes subjected to bending loads

Exhaust gas heat exchanger design based on the engine backpressure and heat rate criteria

Incidence of the lean philosophy construction in the productivity and analysis of processes in internal finishes in masonry living quarters in the construction projects: case-residential complex Callejas-Cucuta-Colombia

Influence of natural frequency on stability during milling of inconel and udimet 500

Substitution of natural stony material aggregates in conventional 17.5 mpa non-structural concrete mixtures by means of percentage addition of hospital solid waste