TECCIENCIA最新文献_第6页

Comparative Analysis of the Weibull Model and Observed Wind Data in the City of Floridablanca, Colombia. 威布尔模型与哥伦比亚Floridablanca市观测风数据的比较分析。

IF 0.3

TECCIENCIA Pub Date : 2019-02-05 DOI: 10.18180/TECCIENCIA.2018.25.8

E. Hernández, E. Córdoba, G. García

{"title":"Comparative Analysis of the Weibull Model and Observed Wind Data in the City of Floridablanca, Colombia.","authors":"E. Hernández, E. Córdoba, G. García","doi":"10.18180/TECCIENCIA.2018.25.8","DOIUrl":"https://doi.org/10.18180/TECCIENCIA.2018.25.8","url":null,"abstract":"The main objective of this article is to evaluate the wind resource in the city of Floridablanca, Colombia. In Colombia, the supply of electrical energy comes mainly from hydroelectric mega-power stations, presenting generation problems in times of drought. The wind resource is an adequate alternative to diversify the electricity supply in the country. To analyze the characteristics of the wind, recorded measurements were carried out, every 15 minutes at a height of 30 m, throughout the year 2016, at a meteorological station located in Floridablanca, Colombia. In this study we present a statistical analysis of the wind characteristics in Floridablanca, Colombia, we applied a Weibull distribution of two parameters to model the wind speed and thus determine the wind potential. The average annual speed was 0.72 m / s with a standard deviation of 0.61 m / s. The monthly Weibull scale parameter varied from 0.52 m / s to 0.91 m / s, the monthly parameter varied from 0.98 to 1.37. The highest power density observed was 0.35 w / m ^ 2 in the months of February and August, the monthly average power density was 0.23 w / m ^ 2 which indicates a very poor wind potential considering that they are considered good wind potentials greater than 500 w / m ^ 2. This study contributes to evaluate the wind potential of Floridablanca, Colombia, and can be used, methodologically, to quantify the wind potential with possibilities of generating electric power in any part of the country.","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2019-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48277333","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}

引用次数: 4

Hydrogen Production and Purification by Bioethanol Steam Reforming and Preferential Oxidation of CO 生物乙醇蒸汽重整及CO优先氧化制氢纯化

IF 0.3

TECCIENCIA Pub Date : 2019-01-16 DOI: 10.18180/TECCIENCIA.2018.25.7

Juan David Arevalo Arias, Ángel Martínez Hernández, J. Vargas, Luis Fernando Córdoba

{"title":"Hydrogen Production and Purification by Bioethanol Steam Reforming and Preferential Oxidation of CO","authors":"Juan David Arevalo Arias, Ángel Martínez Hernández, J. Vargas, Luis Fernando Córdoba","doi":"10.18180/TECCIENCIA.2018.25.7","DOIUrl":"https://doi.org/10.18180/TECCIENCIA.2018.25.7","url":null,"abstract":"Hydrogen production and purification was studied in a combined system including double catalytic bed reaction system. Steam Reforming of Ethanol (SRE) was performed in Ni/CeO2-ZrO2 catalyst and, subsequently, the reforming products gases passed through a second fixed bed containing Au/CeO2-ZrO2 catalyst in order to carry out the preferential CO oxidation (PROX-CO). Initially, the effect of temperature and the initial water concentration in the fed ethanol were evaluated to determine the conditions that maximize the H2/CO ratio while maintaining 100% conversion of ethanol. These requirements were accomplished when 25 mol% H2O and 4 mol% C2H5OH (steam/ethanol molar ratio = 7) were used. The catalyst stability was assessed under these reaction conditions at 600 oC, during more than 160 h on stream, obtaining ethanol conversions above 99% during the entire test and H2 productivity close to ideal. In the second part of the work, in order to obtain H2 grade PEM, the effect of O2 concentration in the feed stream on the selective CO oxidation using Au-CZ catalysts was investigated in the temperature range of 50-250 oC. Catalytic stability test was also performed. Characterization techniques: Temperature Programmed Reduction (TPR), X-Ray Diffraction (XRD), SEM-EDX, which confirmed the presence of a strong interaction between the mixed oxide support and the metal. In this study, we show a reaction system with double catalytic fixed bed in which hydrogen is obtained with the specifications required by PEM fuel cell. The tested materials exhibit high activity and selectivity towards hydrogen production and CO selective oxidation in the range of temperature studied","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2019-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48839708","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}

引用次数: 4

Pulse width Prediction Control Technique Applied to a Half-Bridge Boost 脉冲宽度预测控制技术在半桥升压中的应用

IF 0.3

TECCIENCIA Pub Date : 2018-12-05 DOI: 10.18180/tecciencia.2018.25.6

J. Bayona, José Guillermo Guarnizo Marin, N. Gélvez

引用次数: 1

Development of a perforated panel for acoustic conditioning based on Colombian guadua fiber (Guadua angustifolia Kunth) 基于哥伦比亚番石榴纤维（guadua angustifolia Kunth）的声学调节穿孔板的开发

IF 0.3

TECCIENCIA Pub Date : 2018-12-01 DOI: 10.18180/TECCIENCIA.2018.25.2

Darío Alfonso Páez Soto, Luis Jorge Herrera Fernandez, O. Agudelo, Shymmy Wilbermer Garcia Bustos, Marcelo Herrera

引用次数: 2

Renewable Insulation materials constructed from Colombian materials according to the principles of Sustainable Development: a review of possibilities 根据可持续发展原则，由哥伦比亚材料建造的可再生绝缘材料:对可能性的审查

IF 0.3

TECCIENCIA Pub Date : 2018-06-01 DOI: 10.18180/TECCIENCIA.2018.24.4

Marcelo Herrera, Darío Alfonso Páez Soto

引用次数: 4

Development of a Low-Cost, Short-Range Radar System to Measure Speed and Distance 一种低成本、近程速度和距离测量雷达系统的研制

IF 0.3

TECCIENCIA Pub Date : 2017-02-28 DOI: 10.18180/TECCIENCIA.2017.22.11

Yolanda G. Parra, T. Guzmán, J. Gonzales

引用次数: 2

Hand recognition using depth cameras 使用深度相机进行手部识别

IF 0.3

TECCIENCIA Pub Date : 2015-12-12 DOI: 10.18180/tecciencia.2015.19.10

Alexander Cardona López

引用次数: 1

Incidence of using chickenfat basedbiodiesel on the performance of a 13.5kW compression ignition piston enginefor power generation 利用鸡脂生物柴油对13.5kW压缩点火活塞发动机发电性能的影响

IF 0.3

TECCIENCIA Pub Date : 2015-10-16 DOI: 10.18180/TECCIENCIA.2015.19.9

Fabio-Emiro Sierra-Vargas, M. A. Montenegro, F. N. Argoty

{"title":"Incidence of using chickenfat basedbiodiesel on the performance of a 13.5kW compression ignition piston enginefor power generation","authors":"Fabio-Emiro Sierra-Vargas, M. A. Montenegro, F. N. Argoty","doi":"10.18180/TECCIENCIA.2015.19.9","DOIUrl":"https://doi.org/10.18180/TECCIENCIA.2015.19.9","url":null,"abstract":"New alternatives and feedstocks have been identified to overcome the impact caused by combustion of fossil fuels; some of them point on the promotion of second, third and fourth generation biofuels resulting from non-edible crops and other raw materials. The lack of information about the performance of engines used for power generation encumbers the use of chicken fat biodiesel in gensets in rural areas or other applications in which power generation is the main purpose. Therefore, this work aims to identify the incidence of using chicken fat biodiesel on the performance of a 13.45kWe internal combustion engine employed for power generation. The biodiesel was synthesized in lab conditions and afterwards fueled in the engine. Parameters such as the total electrical efficiency, heat rate, fuel consumption and the exhaust gas emissions are analyzed. A Lister TR2 diesel engine fixed to a Leroy Soner LSA 38 M/J electrical generator was employed. The chicken fat biodiesel was successfully produced in a lab-scale facility and afterward employed as biofuel blended with commercial biodiesel BPa7. The efficiency of the genset increases up to 38.79% with B22.5 higher than the 35.08% obtained for B0. As a consequence of the fuel reduction and addition of a sustainable biofuel such as chicken-fat biodiesel the carbon footprint was also decreased; the CO2 released decreases about 2.9 kgCO2h-1 when the genset was operating at full capacity fueled with B22.5","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2015-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67507829","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}

引用次数: 4

Perspectivas de un modelo de educación inclusiva para sordos a nivel superior 高等教育中聋人全纳教育模式的前景

IF 0.3

TECCIENCIA Pub Date : 2014-06-06 DOI: 10.18180/tecciencia.2014.3.1

Willian Antonio Ariza Rua

{"title":"Perspectivas de un modelo de educación inclusiva para sordos a nivel superior","authors":"Willian Antonio Ariza Rua","doi":"10.18180/tecciencia.2014.3.1","DOIUrl":"https://doi.org/10.18180/tecciencia.2014.3.1","url":null,"abstract":"The article is focused to give a panorama in fi rst plane in determining the appearances of the education like right, in second measure in specifying the right to the education in the international fi eld to establish the importance that has the education for the States and fi nally, instituir in which moment gives start to an education And in which order has implemented in the University ECCI. The institution designed a proposal to build a model of education inclusiva with the purpose that answer to the char-acteristic linguistic partner of the Deaf students, guaranteeing them the right to the education, to the opportunity and to the equality of conditions, by means of a pertinent educational offer that respect his tongue And it project them in labour fi elds of high demand in the frame of the interculturalidad, the diversity and the equity, for his integral develop-ment like human beings.Giving as resulted a politics of inclusion, the realisation of adjust reasonable to level curricular, the training of educa-tional in context of the deaf person and tongue of signals, adecuación of media, creation of semilleros of investigation, accessibility and virtualización of the asignaturas virtual and design of level Of Spanish like second tongue for deaf people, the previous obeyed to the fruit of a work investigativo, inside the line of investigation Pedagogical Innovation and in the sublínea Special Projects Education Inclusiva for deaf in Upper Education, employing an explanatory descrip-tive study. That it comported us to the educational inclusion for this type of people like subjects of rights the frame of the educational context so that they are partícipes of transformations.","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2014-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67507717","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}

引用次数: 0

Analysis of link time in Mobile Ad-Hoc Networks (MANET) 移动自组网(MANET)中链路时间分析

IF 0.3

TECCIENCIA Pub Date : 2013-02-02 DOI: 10.18180/tecciencia.2022.34.1

Amber Israr, Zain ANWAR ALI, Muhammad Salman Pathan, Rana Javed Masood

引用次数: 0