Ingenieria最新文献

{"title":"Algoritmo de optimización para sistema de gestión eléctrica inteligente","authors":"José David Murillo Rodríguez","doi":"10.15517/ri.v30i2.40598","DOIUrl":"https://doi.org/10.15517/ri.v30i2.40598","url":null,"abstract":"espanolMediante un algoritmo de optimizacion, se muestra el comportamiento de una gestion electrica inteligente basado en la combinacion multiagente de almacenamiento y energia alternativa. El algoritmo de control se concibe a traves de una optimizacion del flujo energetico de una residencia. Con datos reales de consumo y generacion prevista la optimizacion fija un limite de ahorro del 93% respecto a un sistema tradicional sin gestion electrica. De acuerdo al flujo energetico y bajo las mismas condiciones de optimizacion, se comprueba el funcionamiento del algoritmo, el cual permite acercarse al limite y lograr un 86% de ahorro. EnglishThrough an optimization algorithm, the behavior of intelligent electrical management based on the multiagent combination of storage and alternative energy is shown. The control algorithm is conceived altogether with the optimization and the energy flow of a residence. With real consumption and expected generation data, the optimization sets a savings limit of 93% compared to a traditional system without electrical management. According to the energy flow and under the same optimization conditions, the operation of the algorithm is verified and the results approach the limit and achieve savings of 86%.","PeriodicalId":41509,"journal":{"name":"Ingenieria","volume":"30 1","pages":"95-102"},"PeriodicalIF":0.4,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49318858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uso de anclajes FRP en vigas de concreto armado reforzados externamente con bandas CFRP sometidas a cargas cíclicas","authors":"J. L. Bazán, Víctor I. Fernández-Dávila, J. Samaniego","doi":"10.15517/ri.v30i2.39806","DOIUrl":"https://doi.org/10.15517/ri.v30i2.39806","url":null,"abstract":"espanolEn Peru existe una demanda creciente de mejorar, ampliar o remodelar la infraestructura existente, que generalmente ha sido disenada con estandares estructurales menos exigentes que los actuales. Es por esta razon que se utilizan diversas tecnicas entre las que se destaca el reforzamiento mediante sistemas FRP (fiber reinforced polymer). Entre las aplicaciones predominantes de este sistema se tiene el refuerzo a flexion de elementos de concreto armado (CA) tales como muros, losas y en especial las vigas. Durante la aplicacion del FRP se pueden presentar diversas interferencias o limitaciones constructivas, lo que ha dado lugar al planteamiento de soluciones practicas y modernas como el uso de sistemas de bandas de FRP, platinas y barras de FRP, sistemas FRP del tipo NSM, y el uso de anclajes de FRP. Estos procedimientos estan contemplados en la guia ACI 440.2R (ACI, 2017), utilizada para la construccion y el diseno de refuerzo externo con FRP. El presente articulo muestra los resultados sobre la experiencia en laboratorio de cuatro vigas de CA, considerando que solamente tres fueron externamente reforzadas a flexion, ademas incluye el uso de anclajes hechos de FRP, para desarrollar el comportamiento a traccion de la banda FRP de refuerzo externo. Los especimenes se sometieron a cargas ciclicas mediante un ensayo cuasi-estatico. Los resultados indican que estos elementos, reforzados con bandas y anclajes FRP, poseen una capacidad de resistencia superior a la capacidad nominal a flexion. Ademas, el comportamiento exhibido durante el ensayo fue estable y sin anomalias inesperadas que se hayan observado. EnglishIn Peru there is a growing demand to improve, expand or remodel existing infrastructure, which has generally been designed with structural standards less demanding than the current ones. It is for this reason that various techniques are used, such as reinforcement using FRP (fiber reinforced polymer) systems. Among the predominant applications of this system is the reinforcement to bending of reinforced concrete (RC) elements such as walls, slabs and especially the beams. During the application of the FRP, various interferences or constructive limitations could occur, which has led to the approach of practical and modern solutions such as the use of FRP band systems, FRP plates and bars, NSM systems, and the use of anchors made of FRP. These procedures are contemplated in the ACI's guide 440.2R (ACI, 2017), used for the construction and design of external reinforcement with FRP on RC elements. The purpose of this article is to show the results on the laboratory experience of four RC beams, considering that only three of them were externally strengthened to bending, a solution with anchors made of FRP was also used, in order to allow the tensile behavior of the FRP external reinforcement. The specimens tested were subjected to cyclic loads by a quasi-static test, and the results indicate that these elements strengthened with FRP bands an","PeriodicalId":41509,"journal":{"name":"Ingenieria","volume":"30 1","pages":"77-94"},"PeriodicalIF":0.4,"publicationDate":"2020-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49373924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Análisis en Modo de Conducción Discontinuo del convertidor DC/DC 1-FB-1","authors":"Luis Alejandro Gólcher Barguil","doi":"10.15517/ri.v30i2.40283","DOIUrl":"https://doi.org/10.15517/ri.v30i2.40283","url":null,"abstract":"espanolSe plantea el analisis del nuevo Convertidor DC-DC denominado 1-FB-1 operando en modo de conduccion discontinuo. Se establece el limite de operacion entre modos de conduccion continuo y discontinuo para definir apropiadamente los valores de los elementos en la etapa de diseno. El analisis abarca la descripcion de los estados del circuito, asi como expresiones analiticas que describen la corriente del inductor y el voltaje de salida del capacitor. EnglishThe Discontinuous Conduction Mode analysis of the new 1-FB-1 DC/DC converter is proposed. The mode boundary is established for the designer to appropriately define the continuous o discontinuous operation. The analysis comprehends the converter inductor current and output voltage waveforms, and their analytical expressions.","PeriodicalId":41509,"journal":{"name":"Ingenieria","volume":"30 1","pages":"133-146"},"PeriodicalIF":0.4,"publicationDate":"2020-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41853550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelado de la cinética de hidratación del frijol Matambú (Phaseolus vulgaris) utilizando un sistema automático basado en análisis de imágenes digitales","authors":"Ovidio Valerio Cubillo, Guilllermo Vargas Elías, Luis Barboza Barquero","doi":"10.15517/ri.v30i2.39588","DOIUrl":"https://doi.org/10.15517/ri.v30i2.39588","url":null,"abstract":"espanolEl frijol comun es uno de los cultivos mas consumidos en todo el mundo, y de gran importancia para la seguridad alimentaria en America Central. El objetivo de este estudio fue determinar la velocidad a la cual el frijol Matambu (Phaseolus vulgaris) se expande despues del remojo del grano. Se desarrollo un sistema de procesamiento de imagenes digitales automatizado para medir el volumen de grano individual y reteniendo su integridad. La expansion volumetrica se evaluo con modelos Peleg y sigmoides para temperaturas de agua de 20-70 oC. Las ecuaciones de los parametros cineticos se describieron como funciones de temperatura utilizando la ecuacion de Arrhenius con una energia de activacion de 22.410 kJ mol-1. Los resultados obtenidos son potencialmente utiles para futuros estudios sobre propiedades de alimentos, procesos y diseno de envases. EnglishCommon bean is one of the most consumed crops worldwide, and of great importance for food security in Central America. The aim of this study was to determine the speed in which Matambu bean (Phaseolus vulgaris) expands after grain soaking. An automated digital image processing pipeline for measuring individual grain volume and simultaneously retaining its integrity was validated and used. Volumetric expansion was evaluated with Peleg and sigmoid models for water temperatures of 20-70 oC.The equations kinetic parameters weredescribed as functions of temperature using the Arrhenius equation with an activation energy of 22.410kJ mol-1. The obtained results are potentially useful for future studies on food properties, process and packaging design.","PeriodicalId":41509,"journal":{"name":"Ingenieria","volume":"30 1","pages":"63-76"},"PeriodicalIF":0.4,"publicationDate":"2020-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47107167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aircraft Noise and Land Use Zoning Compatibility around the Juan Santamaría Airport, Costa Rica","authors":"José Miguel Rivera Acevedo, Jonathan Agüero Valverde","doi":"10.15517/ri.v30i2.37436","DOIUrl":"https://doi.org/10.15517/ri.v30i2.37436","url":null,"abstract":"The purpose of this study is to evaluate the noise generated by aeronautical operations around Juan Santamaría Airport and its compatibility with the land use and the proposed zoning around the airport. Aircraft noise can produce discomfort, interference with daily activities, and excessive vibrations; hence, land use planning around airports is of importance. Maps were prepared through computational models representing the noise levels generated by the operations of the airport. The operations were analyzed by aircraft type, schedules, and flight tracks for 2013 and projections for 2016, 2026, and 2036. Noise level data were collected with a sound level meter at 28 points surrounding the airport. Comparing the annual maps of 2013 and 2036, it was determined that 41,24 % of the analyzed area will present clear perceivable increases (5 dB to 10 dB), and 1,36 % of the area will have double loudness increases (10 dB to 14 dB). The 2016 maps show locations where it is recommended to incorporate solutions in the construction regulation that reduce noise between 25 dB and 30 dB in the residential and scholar areas located within 65 dB and 70 dB, such as Coco, Rincón Monge, Rincón Herrera, and Bajo Sorda. This finding is supported by field measurements. The proposed zoning was contrasted against the yearly day-night average sound level of 2036. The biggest issue of excessive aircraft noise is located near the west runway where a range above the 75 dB is expected. Any edification of permanent residence here must be banned.","PeriodicalId":41509,"journal":{"name":"Ingenieria","volume":"30 1","pages":"14-31"},"PeriodicalIF":0.4,"publicationDate":"2020-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49109357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Heterogeneous Catalytic Ozonation of Phenol over Iron-based Catalysts in a Trickle Bed Reactor","authors":"Luis Briceño Mena, Esteban Durán Herrera","doi":"10.15517/ri.v30i2.39236","DOIUrl":"https://doi.org/10.15517/ri.v30i2.39236","url":null,"abstract":"The use of continuous reactors for heterogeneous catalytic ozonation is yet to be investigated in order to develop a viable technology for industrial applications. This paper presents hydrodynamic and degradation studies on the use of a co-current down flow trickle bed reactor for heterogeneous catalytic ozonation of phenol (as model pollutant) over Fe-Diatomite pellets and Fe-coated glass beads. It was found that the reactor can operate under trickle or pulsing flow regimes, promoting mass transfer augmentation. Residence time distribution data, fitted with n-CSTR and axial dispersion (ADM) models, showed low axial dispersion and high flow distribution. Just the Fe-diatomite pellets showed important phenol adsorption (16 %). Degradation experiments demonstrated that phenol conversion was substantial when using both catalysts, up to 19,7 % pollutant conversion with liquid-phase space times of just 6 s. Compared to direct ozonation, the use of the Fe-diatomite pellets and Fe-coated glass beads enhanced the reactor performance by 48 % and 23 %, respectively. It was confirmed that mass transfer is an important factor that restricts this reaction system performance; consequently, further improvement in mass transport rate is necessary for system optimization.","PeriodicalId":41509,"journal":{"name":"Ingenieria","volume":"30 1","pages":"1-13"},"PeriodicalIF":0.4,"publicationDate":"2020-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44380820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nuevas Expectativas de Mejora a Pesar de las Dificultades","authors":"Nelson Leonardo Diaz Aldana","doi":"10.14483/23448393.16029","DOIUrl":"https://doi.org/10.14483/23448393.16029","url":null,"abstract":"Nota Editorial V25N1","PeriodicalId":41509,"journal":{"name":"Ingenieria","volume":"25 1","pages":"4-5"},"PeriodicalIF":0.4,"publicationDate":"2020-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45043715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extractos de las Hojas de Salvia Officinalis y Sambucus Peruviana H.B.K. como Inhibidores de Incrustaci´on","authors":"Luis Antonio Castillo Campos, Steevenson José Barreto","doi":"10.14483/23448393.15329","DOIUrl":"https://doi.org/10.14483/23448393.15329","url":null,"abstract":"espanolContexto: El fenomeno de formacion de las incrustaciones se ha convertido en uno de los problemas operacionales con mayor frecuencia de ocurrencia en la industria petrolera, y la busqueda de fuentes innovadoras de mitigacion ha resultado ser el horizonte al cual han apuntado las empresas del area. Es por ello que en esta investigacion se evalua el efecto anti incrustante que presentaron los extractos de las hojas de Salvia officinalis y Sambucus peruviana H.B.K. Metodo: Se realizo la caracterizacion fisicoquimica de una muestra de agua de produccion del Campo Oritupano y se obtuvieron los extractos, para luego ser identificadas sus propiedades fisicas. A continuacion se determino el desempeno inhibitorio de cada producto natural en conjunto con un agente comercial, todo ello a traves de la aplicacion de la Norma NACE TM0374-2007, ademas de aplicar un analisis estadistico para visualizar las diferencias significativas que pudiesen estar presentes entre las eficiencias experimentales y comerciales. Resultados:Los extractos de Salvia officinalis y Sambucus peruviana H.B.K empleados como anti incrustantes exteriorizaron resultados de pH de caracter acido y viscosidades por debajo de los 2 cSt; mostrando rendimientos maximos de 87,27 y 90,91% para las soluciones a base de sauco y salvia respectivamente y comportamientos estadisticos similares al producto comercial referencial. Conclusiones:En terminos cuantitativos, el prospecto a base de salvia resulto mas efectivo al evaluarlo en la muestra de agua de produccion del Campo Oritupano, mostrando un comportamiento directamente proporcional concentracion – eficiencia, ademas de exponerse con caracteristicas mas acordes a un bioinhibidor de incrustaciones de Carbonato de Calcio, aunque con proporcion de solidos que deberian disminuirse aun mas, requiriendo que en un futuro se mejore esta caracteristica y se pueda medir la accion conjunta de ambos extractos en la prevencion de las incrustaciones, tanto experimentalmente como en campo. EnglishContext: The phenomenon of scale formation has become one of the operational problems with the highest frequency of occurrence in the oil industry, and the search for innovative sources of mitigation has proved to be the horizon to which the companies in the area have pointed. This is the reason why in this investigation the anti-fouling effect that the extracts of the Salvia officinalis and Sambucus peruviana H.B.K leaves was evaluated. Method:The physicochemical characterization of a production water sample of the Oritupano Oilfield was performed and the extracts were obtained, and then its physical properties were identified. Next, the inhibitory performance of each natural product was determined together with a commercial agent, all through the application of the NACE Standard TM0374-2007, in addition to applying a statistical analysis to visualize the significant differences that could be present between the experimental and commercial efficiencies. Results","PeriodicalId":41509,"journal":{"name":"Ingenieria","volume":"25 1","pages":"68-89"},"PeriodicalIF":0.4,"publicationDate":"2020-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46950144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Topologies for Battery and Supercapacitor Interconnection in Residential Microgrids with Intermittent Generation","authors":"Eider Alexander Narvaez Cubillos, Camilo Andrés Cortés Guerrero, César Leonardo Trujillo Rodríguez","doi":"10.14483/23448393.15668","DOIUrl":"https://doi.org/10.14483/23448393.15668","url":null,"abstract":"Context:This paper presents a comparative study of the performance of three topologies for interconnecting Lithium ion batteries and supercapacitors in a hybrid energy storage system for use in electric residential microgrids with intermittent generation. The hybrid system’s main purpose is to prolong battery life, using the supercapacitor to handle the dynamic component of current from a pulsed current load. This work builds upon a preliminary simulation-based study, in which two semi-active topologies were compared and evaluated. Here, we add an active topology to the study and describe the operational benefits of each topology. \u0000Method: For every topology in this study, a non-isolated half-bridge bidirectional DC converter was used, and a proportional–integral (PI) double-loop linear ACC control algorithm was designed for controlling the converters. In the active topology an additional optimisation-based real-time frequency-decoupling control  strategy was employed. \u0000Results:A parallel active topology allows better management of stored energy in the SC by supporting variation of SC terminal voltages with a DC converter as interface to the DC bus. \u0000Conclusions: Semi-active topologies are easier to design and control, but the operational benefits of supercapacitors require voltage variation at the terminals. This variation is made possible with an active topology.","PeriodicalId":41509,"journal":{"name":"Ingenieria","volume":"25 1","pages":"6-19"},"PeriodicalIF":0.4,"publicationDate":"2020-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45037822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cuantificación estructural forestal según uso de la tierra y reservas de carbono de la Finca Experimental Interdisciplinaria de Modelos Agroecológicos-FEIMA, Turrialba, Costa Rica","authors":"Aldo Jesús Quesada Chacón, Shiori Nakajima, Pedro Rojas Camacho, C. Alvarado","doi":"10.15517/ri.v30i1.38401","DOIUrl":"https://doi.org/10.15517/ri.v30i1.38401","url":null,"abstract":"espanolEl seguimiento de las caracteristicas del bosque es relevante en el contexto de cambio climatico. En este estudio, se ha evaluado la estructura vertical y horizontal, asi como las reservas de carbono de un parche boscoso de 28 ha en sucesion temprana en el Caribe de Costa Rica. Esta evaluacion se ha hecho con base en el uso de la tierra y en una hipotesis de homogeneidad forestal. Los resultados indicaron que el promedio del DAP, la altura de los arboles y la apertura del dosel fueron 1.15 m, 20.83 m y 18.5%, respectivamente. De las seis variables estudiadas, el DAP y la apertura de dosel fueron las mas importantes para determinar la estructura forestal y los resultados mostraron alta homogeneidad en el bosque. Un calculo de la biomasa sobre el suelo determino que la finca estudiada tiene entre 100-130 T por hectarea para un total de 1372-1795 T de carbono total sobre el bosque. Este estudio represento el primer acercamiento a la investigacion forestal de la estacion experimental bajo analisis y ha sido importante para determinar la linea base de informacion de esta. Se espera que futuros estudios puedan utilizar la informacion de la presente investigacion para darle seguimiento a la progresion boscosa en ese sitio. EnglishThe monitoring of forest characteristics is relevant in the context of climate change. In this study, both vertical and horizontal forest structure as well as carbon stocks were determined for a 28 ha successional forest patch on the Costa Rican Caribbean. This evaluation was performed on the basis of land use and assuming a hypothesis of homogeneity in forest structure. Results indicated that average DBH, tree height and canopy openness were 1.15 m, 20.83 m and 18.5%, respectively. Of the six structural variables determined, DBH and canopy openness were the two most important and results showed a high level of homogeneity in the forest. A calculation of the biomass showed that the forest patch contained between 100-130 T/ha above the ground and a total carbon stock of 1372-1795 T. This investigation represented the first approach to study the forest associated with the experimental station under scrutiny and was relevant to determine baseline data. It is expected that future studies can use the information presented herein for their purposes.","PeriodicalId":41509,"journal":{"name":"Ingenieria","volume":"30 1","pages":"59-74"},"PeriodicalIF":0.4,"publicationDate":"2019-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46787027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}