Dyna-Colombia最新文献

{"title":"EVALUATION OF THE OPERATION OF A PUMP USED AS A TURBINE (PAT) UNDER REAL OPERATING CONDITIONS IN A DRINKING WATER TREATMENT STATION (DWTS)","authors":"Eloy Díaz Dorado, J. CIDRAS PIDRE, J. Garrido Campos, Martin Casal, Fernando GUITIÁN GUITIÁN, Alejandro ARIAS BLANCO, Isabel FERNANDEZ SOÑORA, Diego ACEVEDO IGLESIAS, Angel FERNANDEZ VILAN, Camilo José Carrillo González","doi":"10.6036/10874","DOIUrl":"https://doi.org/10.6036/10874","url":null,"abstract":"This paper analyzes the performance under real conditions of an axial flow hydraulic pump used as a turbine (Pump as Turbine or PaT) in a Drinking Water Treatment Station (DWTS).\u0000The DWTS is located at the municipality of Baiona (NW of Spain) and is supplied from a reservoir located at a height of about 50 m above the level of the plant. The existing difference in level at the intake makes it necessary to regulate the flow at the plant inlet by means of a valve, for which, prior to the development of the generation installation, a gate valve was used.\u0000In order to take advantage of the existing difference in level, a 6 kW micro-generation system was put into service using a PaT supported by a butterfly valve for flow regulation. The main reasons for choosing this generation system were the high cost of small turbines for the characteristics of the hydraulic connection of the DWTS and the limited availability of this type of device. The system is in service and being monitored by a SCADA since July 2019 so there is a relevant amount of records that allows analyzing different operating conditions.\u0000In the sizing of a BUTU system it is necessary to estimate the behavior as a turbine since the pump manufacturer only provides data in operation as a pump. There is a large literature proposing methods for estimating the performance of BUTU systems, however, the most widely accepted methods are those validated experimentally, as intended in this article.\u0000Keywords: PaT, renewable generation, micro-hydraulics","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43211568","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":"CHALLENGES FOR THE DEVELOPMENT OF NUMERICAL MODELS FOR METHANE PYROLYSIS WITH LIQUID METAL REACTORS","authors":"Alberto ABANADES VELASCO, Á. MARTÍN RODRÍGUEZ","doi":"10.6036/10880","DOIUrl":"https://doi.org/10.6036/10880","url":null,"abstract":"Methane pyrolysis is a technology that is being postulated as an option within the Hydrogen economy. Pyrolysis allows gaseous hydrocarbons to be processed without directly emitting CO2, as it is carried out in the absence of oxygen, allowing its integration into the circular economy concept by producing two recoverable elements, such as solid carbon and hydrogen. It is currently classified as a form of turquoise hydrogen generation, as it shares characteristics of green hydrogen, as it does not emit carbon dioxide in the process, and blue hydrogen, as its primary resource is natural gas. There are several technological options to carry out the pyrolysis of natural gas, ranging from direct thermolysis, through the use of catalysts, the use of plasma arcs, or the development of hydrocarbon decomposition in liquid reaction media, such as molten salts or liquid metals. This communication will describe the main remains for the development of pyrolysis reactors with liquid metals, which are currently at Technology Readiness Level around TRL4, in order to advance towards industrially viable and competitive prototypes and demonstrators. That development requires creating numerical models that can be used for the engineering design of pyrolysis reactors. The design tools for this case must be capable of coupling multiphase and multicomponent fluid-mechanical evaluation, which takes into account the evolution of a gaseous phase (natural gas) into a liquid phase (liquid metal) with the formation of solids (carbon). The fluid dynamic calculation runs into the lack of experimental data that allow its validation, which becomes a critical aspect to be able to estimate the chemical kinetics of the reaction itself. This kinetics strongly depends on the residence time of the gas in the medium, and on the temperature. In this communication, those relations between the fluid-mechanical and chemical model that would allow the evaluation of the conversion of natural gas to hydrogen and carbon in the design of the reactor are analyzed. As a result, a series of experiments are proposed to validate these design tools for the pyrolysis process in liquid metal.\u0000Keywords: Decarbonization, Hydrogen, Circular economy, Carbon","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41992865","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":"ROBOTIZED WORKSTATION FOR INTELLIGENT SANDING PROCESSES OF WOODEN WORKPIECES","authors":"Eduardo DIEZ CIFUENTES, Ricardo ALZUGARAY FRANZ, Arturo PADILLA BERNEDO, Erardo LEAL MUÑOZ, Matias Madaf, Pablo SANHUEZA CARVAJAL, Jorge GONZALEZ SALAZAR","doi":"10.6036/10873","DOIUrl":"https://doi.org/10.6036/10873","url":null,"abstract":"This study aimed to develop a workstation to investigate robotic sanding processes of wooden parts. The applied methodology includes the conceptual design of the station, incorporating sensors for online measurement of process variables. The station is controlled by a computer that enables interaction with the robot, controlling the abrasive tool rotating speed, and acquiring and visualizing the process signals. The implemented workstation was used to investigate the influence of the sanding parameters on the process variables. The results established that the grain size and the rotational speed of the sandpaper produce statistically significant variations in the surface finishing. Finally, equations are proposed for relating the surface roughness with the sanding torque and acoustic emission measured during the operation.\u0000\u0000Keywords: wood sanding; industrial robotics; surface roughness; sanding torque; acoustic emission.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45811008","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":"MANUFACTURING AND CHARACTERIZATION OF INTELLIGENT PEDESTRIAN CROSSINGS TO IMPROVE ROAD SAFETY","authors":"T. J. M. Mateo Sanguino, Jose Miguel Davila, Mnuel REDONDO GONZALEZ, J. M. Lozano Domínguez","doi":"10.6036/10726","DOIUrl":"https://doi.org/10.6036/10726","url":null,"abstract":"Road signalling systems help to improve attention and reduce speed while driving. However, most solutions are not commercially available, require expensive infrastructure, lack intelligence, or do not cover 100% of road users. To reduce this gap, this work presents a speed bump with intelligent light signalling that detects both pedestrians and vehicles on zebra crossings. The system is made up of low-cost prefabricated nodes with maturity level TRL8 that can be adapted to any type of road. As main novelty, this paper describes the materials and methods used to manufacture speed bumps with mixtures of resins, aggregates and reinforcing fibers injected cold on aluminium mould. As a result of the tests, a compromise between hardness, resistance and elasticity with IP68 rating was reached. This makes it possible to ensure the mechanical and optical operation of the system without the need for external power supplies and with an acceptable manufacturing cost.\u0000Key Words: speed reducer, road safety, pedestrian crossing, intelligent system, mechanical characterization","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46177367","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":"VALIDATION OF A DYNAMIC MODEL OF THE NECK FOR APPLICATIONS IN ERGONOMICS AND FUNCTIONAL ASSESSMENT","authors":"William Ricardo VENEGAS TORO, Ana MEDINA FABARA, Ivan ZAMBRANO OREJUELA, Andres ROSALES ACOSTA, Álvaro Felipe Page Del Pozo","doi":"10.6036/10881","DOIUrl":"https://doi.org/10.6036/10881","url":null,"abstract":"A dynamic neck model is proposed for functional assessment or ergonomic studies using data obtained from conventional biomechanical tools such as video photogrammetry and force platforms. The head and neck inertial parameters are obtained through regression equations and refined through a calibration process to improve accuracy. Head movement is recorded through video photogrammetry, where marker coordinates are used to calculate finite displacements, linear and angular velocities, and accelerations. An inverse dynamics approach is used to estimate the forces and moments at the C7 vertebral level and the generated muscle power. The model was validated through an experimental study with 30 participants, where its estimates were compared to the measurements obtained from a force platform. The comparison aimed to assess the accuracy and reliability of the model. The results show excellent agreement, with a correlation of 0.976 or higher and a standard error of less than 1% of the head weight\u0000Keywords: Biomechanics, biomechanical model, neck, ergonomics, functional assessment","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49266354","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":"INFLUENCE OF MANUFACTURING ERRORS ON THE BEHAVIOUR OF A TWO-STAGE PLANETARY GEAR TRAIN","authors":"Guanghe HUO HUO, Javier SANCHEZ ESPIGA, Miguel IGLESIAS SANTAMARIA, A. Fernandez del Rincon, Fernando VIADERO RUEDA, Y. Jiao","doi":"10.6036/10879","DOIUrl":"https://doi.org/10.6036/10879","url":null,"abstract":"Planetary gear train is widely used in large heavy-duty machineries such as helicopters and ships due to its large transmission ratio, strong bearing capacity, and small size. In this paper, and the load sharing ratio (LSR) and overall transmission error (TE) of a two-stage double-helical planetary gear train are studied. Firstly, the static balance equations of the double-helical planetary gear train are established. Then, the LSR under different mesh phasing and the overall TE are obtained by solving the equations. Finally, different errors such as pinhole position and eccentricity error are taken into consideration and the influence of errors on load sharing ratio and transmission error are analyzed. The results show that the excitation frequency of transmission error is related to the number of planet gears and mesh phasing and the LSR is related to the mesh phasing, especially to the sequentially phased transmission. It is also concluded that the excitation frequency of the output element of the two stages can be seen as the superposition of the mesh frequencies of each stage and that the studied errors have a significant impact on the LSR and the TE.\u0000\u0000Keywords: Double-helical planetary gear; Meshing phase; Load Sharing Ratio, Transmission Error.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48083337","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":"ENERGY OPTIMIZATION OF MID-RISE BUILDINGS IN TROPICAL AREAS: A RESIDENTIAL SITE CASE STUDY","authors":"Gholamreza Ahmadnia, Sajjad Saeb, Alfonso Cobo Escamilla, Jose Angel CAPITAN GOMEZ","doi":"10.6036/10618","DOIUrl":"https://doi.org/10.6036/10618","url":null,"abstract":"Residential buildings and living conditions have greatly changed over the last two decades. In fact, with a few exceptions, current buildings are not the kind of habitats belonged to today. Due to the development of innovative materials, products and construction methods, the construction of environmentally friendly buildings with better economic efficiency seems essential. The present study seeks to provide simple and practical solutions to reduce energy consumption and develop comfort in residential buildings in cities influenced by hot climatic conditions. To this end, a 4-storey residential building in the city of Ahvaz, Iran, is simulated by Design Builder Software (which uses Energy plus engine) to investigate the impact of alternative roofing and facade materials, awning, windows, and others, on energy efficiency. The results show that using rockwool and aluminum composite panels (ACP) facade, pumice concrete roofing, double glazed windows, vertical awning of a 70 cm height, and a balcony of 50 cm depth are the best composition to thermal reinforcement for residential buildings and decrease energy consumption. Key Words: Energy Consumption Optimization, Thermal Comfort, Residential Complex","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44988065","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":"USE OF COMPOSITE PLASTER MATERIAL FOR THE DEVELOPMENT OF SUSTAINABLE PREFABRICATED: STUDY OF ITS MANUFACTURING PROCESS, PROPERTIES AND SUPPLY CHAIN","authors":"Daniel FERRANDEZ VEGA, Jorge Pablo Díaz Velilla, Alicia ZARAGOZA BENZAL, Jose Angel ZUÑIGA VICENTE","doi":"10.6036/10823","DOIUrl":"https://doi.org/10.6036/10823","url":null,"abstract":"The building sector is currently involved in a process of change as a result of concerns about the sustainability of the construction industry. For this reason, the application of circular economy criteria that are committed to the development of new, more sustainable construction materials has become one of the major challenges included in the European Green Pact. In this research, the physical and mechanical characterisation of a new plaster composite material with the incorporation of recycled rubber granular particles and glass wool waste fibres has been carried out. It has been possible to replace up to 30% of the original plaster material with recycled raw material, improving the thermal behaviour of the prefabricated plaster plates. In addition, good mechanical performance has been obtained and the weight of the precast elements has been reduced. Finally, using the FlexSim simulation software, different scenarios have been examined which have permitted to know the increases in productivity in the manufacturing process derived from the use of these lightened sustainable materials, as well as to verify the reduction in fuel consumption (litres/plate) and CO2 emissions during transport. For all these reasons, the application of circular economy criteria applied to waste management is fundamental to progress towards the achievement of the Sustainable Development Goals.\u0000\u0000Key Words: circular economy, building/construction industry product innovation, sustainable prefabricated construction, efficiency, simulation.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43952055","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":"IFMIF-DONES AND FUSION ENERGY","authors":"Moisés WEBER SUÁREZ","doi":"10.6036/10849","DOIUrl":"https://doi.org/10.6036/10849","url":null,"abstract":"Fusion is a safe, sustainable and massive energy source whose profitable exploitation is a huge technological challenge. Over the past seventy years, numerous investigations and major experiments have brought us close enough to a viable solution to now have a well-defined roadmap, supported by two big experiments that will confirm, on the one hand, how fusion energy production should be optimized (ITER project) and, on the other hand, which materials are suitable for use in the most critical areas of future fusion reactors (IFMIF-DONES project). This article aims to convey the magnitude and the challenges faced by the latter.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46355714","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":"NEW NON-DESTRUCTIVE INSPECTION METHOD WITH GROUND PENETRATING RADAR TO EVALUATE THE SUITABILITY OF THE BACKFILLING GROUTING INJECTION IN TUNNEL BORING MACHINES","authors":"Catalina MONDRAGON ENGUIDANOS, Amparo VERDU VAZQUEZ, Tomas GIL LOPEZ, Jose HERNANDEZ ALVAREZ, Jorge GOMEZ HOYOS, Luis MENDEZ LANZA","doi":"10.6036/10822","DOIUrl":"https://doi.org/10.6036/10822","url":null,"abstract":"This research focuses on the development of a new non-destructive inspection method, based on the interpretation of electromagnetic waves by means of a ground penetration radar (GPR) to evaluate the condition of the backfilling two-component mortar grouting behind the segmental lining in tunnels made by tunnel boring machines (TBM). The data processing by digital models and the analysis of the propagation speed of the along the backfilling grouting layer have enabled the technical and operational feasibility of this novel inspection method.\u0000Once the conceptual framework of the research was defined, it was possible to validate the developed method in a full-scale operational environment in the Metro of Quito Line 1 (Ecuador). This validation involved a battery of tests collating the results obtained through the core-drilling extractions in comparison with the ones obtained with GPR. As a result of these calibration tests, it was possible to identify a range of propagation speeds linked to grouting in optimal execution conditions, as well as other ranges associated with potential anomalies. Finally, it was possible to implement this new inspection methodology on a regular basis in the Metro of Quito, where the conventional quality control by core-drillings was replaced almost entirely for the new method with GPR.\u0000Keywords: tunnel boring machine (TBM); breaching; mortar; ground penetrating radar; electromagnetic.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43723596","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}