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Smart cities have a significant impact on the future of renewable energies as terms such as sustainability and energy saving steadily become more common. In this regard, both wind and hydrokinetic compact-size turbines can play important roles in urban communities by providing energy to nearby consumption points in an environmentally suitable manner. To evaluate the operation of a Darrieus turbine rotor as a wind or hydro microgenerator, a series of wind tunnel and water current flume tests were performed. Power and characteristic curves were obtained for all test conditions. In the wind tests, all curves seemed to be identical, which means that the turbine rotor works properly under open-field conditions. Two blockage correction equations were applied to the water channel tests that were performed under blockage values ranging from 0.2 to 0.35 to estimate the operational behavior in open water. Finally, it has been demonstrated that, with the condition of maintaining the Reynolds number between experiments in the wind tunnel and water flume, the turbine wind characteristics represents the its operation in open-water conditions.
Ahmed Gharib-Yosry; Eduardo Blanco-Marigorta; Aitor Fernández-Jiménez; Rodolfo Espina-Valdés; Eduardo Álvarez-Álvarez. Wind–Water Experimental Analysis of Small SC-Darrieus Turbine: An Approach for Energy Production in Urban Systems. Sustainability 2021, 13, 5256 .
AMA StyleAhmed Gharib-Yosry, Eduardo Blanco-Marigorta, Aitor Fernández-Jiménez, Rodolfo Espina-Valdés, Eduardo Álvarez-Álvarez. Wind–Water Experimental Analysis of Small SC-Darrieus Turbine: An Approach for Energy Production in Urban Systems. Sustainability. 2021; 13 (9):5256.
Chicago/Turabian StyleAhmed Gharib-Yosry; Eduardo Blanco-Marigorta; Aitor Fernández-Jiménez; Rodolfo Espina-Valdés; Eduardo Álvarez-Álvarez. 2021. "Wind–Water Experimental Analysis of Small SC-Darrieus Turbine: An Approach for Energy Production in Urban Systems." Sustainability 13, no. 9: 5256.
Small tidal turbines are considered economical and reliable for distributed electricity generation. Low initial cost and ease of installation make them cover all sides of the economic viability triangle in the energy market. However, operating these turbines under realistic tidal velocities remains a great challenge. The work presented herein involves the design and assessment of a micro vertical axis hydrokinetic turbine, operating at low water velocities. The blade profile, solidity and aspect ratio of the turbine model have been selected looking for a self-starting and efficient operation. Thanks to the continuous development in the additive manufacturing technology, the model can be precisely fabricated at a fraction of the cost offered by traditional machining technologies. Experiments have been performed at three flow rates with a range of inlet velocities from 0.3 to 0.7 m/s. Power curves have been obtained for each operating condition, from zero load up to the point of maximum power. Additionally, the non-dimensional tip speed ratio and power coefficient have been used to compare the performance of the different parameters. It has been found that the upstream velocity has the most obvious effect on the turbine performance, and that the peak power coefficient is linked to the intensification in the blockage ratio. Furthermore, the actuator disc theory adjusted for open channel flow has been compared and found in consonance with the experimental results. This theory has also been employed to define the turbine efficiency which, from 0.45 m/s upwards, is over 70%, and as high as 81%. Finally, the performance in an inclined channel has been analysed, finding the correlations of the maximum power points and their corresponding tip speed ratios as a function of the slope.
Ahmed Gharib Yosry; Aitor Fernández-Jiménez; Eduardo Álvarez-Álvarez; Eduardo Blanco Marigorta. Design and characterization of a vertical-axis micro tidal turbine for low velocity scenarios. Energy Conversion and Management 2021, 237, 114144 .
AMA StyleAhmed Gharib Yosry, Aitor Fernández-Jiménez, Eduardo Álvarez-Álvarez, Eduardo Blanco Marigorta. Design and characterization of a vertical-axis micro tidal turbine for low velocity scenarios. Energy Conversion and Management. 2021; 237 ():114144.
Chicago/Turabian StyleAhmed Gharib Yosry; Aitor Fernández-Jiménez; Eduardo Álvarez-Álvarez; Eduardo Blanco Marigorta. 2021. "Design and characterization of a vertical-axis micro tidal turbine for low velocity scenarios." Energy Conversion and Management 237, no. : 114144.
Smart cities will have a strong impact on the future of renewable energies as terms like sustainability and energy saving will be more common. In this sense, both of wind and hydrokinetic compact-size turbines, can play an important role in urban communities by providing energy to nearby consumption points in an environmentally suitable way. This work presents the experimental evaluation for a vertical-axis turbine Darrieus type, operating in an open-field wind tunnel and a confined water channel. Power and characteristic curves have been obtained for all test conditions, also the effect of turbine blockage has been evaluated under blockage values ranging from 6.8% to 35%. The peak power coefficient for the confined flow condition reached a value of 0.31 which is 1.5 times higher than the peak one for the experimental open field condition at the same Reynolds number and a blockage of 20%. Finally, two blockage correction equations have been applied to the water channel tests, which gave values quite similar to the results obtained from the wind tunnel.
Ahmed Gharib-Yosry; Eduardo Blanco-Marigorta; Aitor Fernández-Jiménez; Rodolfo Espina-Valdés; Eduardo Álvarez-Álvarez. Wind-Water Experimental Analysis of Small SC-Darrieus Turbine: An Approach for Energy Production in Urban Systems. 2021, 1 .
AMA StyleAhmed Gharib-Yosry, Eduardo Blanco-Marigorta, Aitor Fernández-Jiménez, Rodolfo Espina-Valdés, Eduardo Álvarez-Álvarez. Wind-Water Experimental Analysis of Small SC-Darrieus Turbine: An Approach for Energy Production in Urban Systems. . 2021; ():1.
Chicago/Turabian StyleAhmed Gharib-Yosry; Eduardo Blanco-Marigorta; Aitor Fernández-Jiménez; Rodolfo Espina-Valdés; Eduardo Álvarez-Álvarez. 2021. "Wind-Water Experimental Analysis of Small SC-Darrieus Turbine: An Approach for Energy Production in Urban Systems." , no. : 1.
The enormous inroads made by renewable energy in recent years have been the key to the development of new technologies designed to obtain energy from a range of resources. Hydrokinetic microturbines used to harness kinetic energy from rivers, tidal and marine currents epitomize such developments. As the reservoir is dispensed with, the water footprint normally associated with conventional hydroelectric generation is minimized. The new prototypes being developed require laboratories with water tunnel infrastructures where they can be accurately reproduced under controlled conditions. However, the construction of a water tunnel demands considerable investment, which prevents many research groups from completing their prototype design work. This paper charts the design of a low-cost hydrodynamic water tunnel at the University of Oviedo, indicating the mechanical and electronic elements as well as the software developments that make up the facility. This construction is a part of a research strategy focused on making the study of new hydrokinetic microturbines designs economically feasible. Moreover, it includes a description of a special software application used to perform the characterization of a hydrokinetic microturbine model in the water tunnel and a demonstration of the scope of the facility in the experimental study of a unit with a Darrieus rotor.
Eduardo Álvarez-Álvarez; Manuel Rico-Secades; Aitor Fernández-Jiménez; Rodolfo Espina-Valdés; E. L. Corominas; Antonio J. Calleja-Rodríguez. Hydrodynamic water tunnel for characterization of hydrokinetic microturbines designs. Clean Technologies and Environmental Policy 2020, 22, 1843 -1854.
AMA StyleEduardo Álvarez-Álvarez, Manuel Rico-Secades, Aitor Fernández-Jiménez, Rodolfo Espina-Valdés, E. L. Corominas, Antonio J. Calleja-Rodríguez. Hydrodynamic water tunnel for characterization of hydrokinetic microturbines designs. Clean Technologies and Environmental Policy. 2020; 22 (9):1843-1854.
Chicago/Turabian StyleEduardo Álvarez-Álvarez; Manuel Rico-Secades; Aitor Fernández-Jiménez; Rodolfo Espina-Valdés; E. L. Corominas; Antonio J. Calleja-Rodríguez. 2020. "Hydrodynamic water tunnel for characterization of hydrokinetic microturbines designs." Clean Technologies and Environmental Policy 22, no. 9: 1843-1854.
As water is a scarce natural resource, one of the most crucial aspects influencing its management is the measurement of user consumptions. There are many studies which set out to analyze issues related to water meter accuracy from either a technical or economical point of view. This investigation proposes an approach that integrates both technical and economic studies to advise in the error evaluation and the units renewal decisions. The technical study includes a methodology for measuring the error produced at different flow rates and an analysis of the results obtained. In the economic study three methods – linked to different management strategies – have been outlined to make an adequate appraisal of the water meter replacement time. The procedure was applied to the water meter park of a medium-sized Spanish city. Results indicate that both measured volume and age contribute to the error evolution, and that there was no noticeable influence regarding either the transmission type or the brand. In the economic study, specific results related to the water replacement were obtained, and a sensibility analysis revealed the influence of the price of water, water meter cost and the cost of capital.
Víctor Manuel Fernández Pacheco; Rodolfo Espina Valdés; Enrique Bonet Gil; Antonio Navarro Manso; Eduardo Álvarez Álvarez. Techno-Economic Analysis of Residential Water Meters: A Practical Example. Water Resources Management 2020, 34, 2471 -2484.
AMA StyleVíctor Manuel Fernández Pacheco, Rodolfo Espina Valdés, Enrique Bonet Gil, Antonio Navarro Manso, Eduardo Álvarez Álvarez. Techno-Economic Analysis of Residential Water Meters: A Practical Example. Water Resources Management. 2020; 34 (8):2471-2484.
Chicago/Turabian StyleVíctor Manuel Fernández Pacheco; Rodolfo Espina Valdés; Enrique Bonet Gil; Antonio Navarro Manso; Eduardo Álvarez Álvarez. 2020. "Techno-Economic Analysis of Residential Water Meters: A Practical Example." Water Resources Management 34, no. 8: 2471-2484.
Obtaining electrical energy from water streams with velocities below one meter per second using hydrokinetic turbines presents an important challenge as it is significantly lower than the range of operations (higher than two meters per second) offered by units currently commercialized. This research goes one step further than the state-of-the-art studies regarding the degree to which energy extraction is influenced by the water flow blockage caused by turbines in water flows; presenting that blockage as a key factor in the procurement of electrical energy using hydrokinetic micro turbines from low-velocity flowing water. Primarily, it describes the design and characterization of a small vertical-axis cross-flow hydrokinetic turbine whose dimensions maximize the blockage of the water circulating in a channel at very low velocity. For the turbine characterization, a model has been tested experimentally in a water tunnel with different flow rates and complemented by simulations under the same conditions using an adjusted computational fluid dynamics model. The experimental tests contemplate the measuring of the turbine’s electrical power, hydraulic coefficient and rotational speeds. The simulations of the numerical model facilitate the procurement of the corresponding water pressure and velocity fields. Further analysis has allowed for a closer examination of the different type of forces exerted on the faces of the blades as well as their position. Upon even closer inspection there appear to be a variety of possible scenarios contingent on the turbine load.
Rodolfo Espina-Valdés; Aitor Fernández-Jiménez; Joaquín Fernández Francos; Eduardo Blanco Marigorta; Eduardo Álvarez-Álvarez. Small cross-flow turbine:Design and testing in high blockage conditions. Energy Conversion and Management 2020, 213, 112863 .
AMA StyleRodolfo Espina-Valdés, Aitor Fernández-Jiménez, Joaquín Fernández Francos, Eduardo Blanco Marigorta, Eduardo Álvarez-Álvarez. Small cross-flow turbine:Design and testing in high blockage conditions. Energy Conversion and Management. 2020; 213 ():112863.
Chicago/Turabian StyleRodolfo Espina-Valdés; Aitor Fernández-Jiménez; Joaquín Fernández Francos; Eduardo Blanco Marigorta; Eduardo Álvarez-Álvarez. 2020. "Small cross-flow turbine:Design and testing in high blockage conditions." Energy Conversion and Management 213, no. : 112863.
Tidal energy is considered as an energy resource of maximum interest in both technical and research fields due to its largely unexploited energy potential. The use of hydrokinetic microturbines is now an attractive option with reduced environmental impact. The first step to evaluate the feasibility of a hydrokinetic microturbines installation is to perform a study of the velocity field characteristics and therefore the energy potential available. Up to now, different numerical models, of one, two and three spatial dimensions have been applied to evaluate the tidal potential in large areas. Due to the high computational resources needed, they include simplifications, like avoiding a precise study of the velocity in the vertical dimension, resulting in incomplete estimations of the available kinetic energy. To complete these estimations, the research presented sets out a methodology to evaluate the current effects, velocity profiles and the energy potential derived from tide movements in an estuary or port by solving the full Navier–Stokes equations. It also considers the water–air interface in the numerical scheme. The methodology is based, firstly, on the definition of a three-dimensional geometrical model of the geographical area of study, and then, the complete model is meshed with finite volumes, where the full three-dimensional Unsteady Navier–Stokes equations are solved. The methodology was applied and validated with a three-dimensional water–air numerical model of the port of Avilés (Spain). In conclusion, water surface elevations, averaged speed cycles, velocity profiles as a function of depth and tidal power and energy data have been obtained without the usual simplifications, which will mean an evaluation more accurate when assessing the implementation of a power generation system.
Rodolfo Espina-Valdés; Eduardo Álvarez Álvarez; Julio García-Maribona; Antonio José Gutiérrez Trashorras; Juan Manuel Gonzalez-Caballin. Tidal current energy potential assessment in the Avilés Port using a three-dimensional CFD method. Clean Technologies and Environmental Policy 2019, 21, 1367 -1380.
AMA StyleRodolfo Espina-Valdés, Eduardo Álvarez Álvarez, Julio García-Maribona, Antonio José Gutiérrez Trashorras, Juan Manuel Gonzalez-Caballin. Tidal current energy potential assessment in the Avilés Port using a three-dimensional CFD method. Clean Technologies and Environmental Policy. 2019; 21 (6):1367-1380.
Chicago/Turabian StyleRodolfo Espina-Valdés; Eduardo Álvarez Álvarez; Julio García-Maribona; Antonio José Gutiérrez Trashorras; Juan Manuel Gonzalez-Caballin. 2019. "Tidal current energy potential assessment in the Avilés Port using a three-dimensional CFD method." Clean Technologies and Environmental Policy 21, no. 6: 1367-1380.
Tides can be a vast and predictable source of renewable energy. Due to the solar and lunar influx on our planet, they move large amounts of water periodically, and this energy can be harnessed using devices designed and positioned adequately, such as current turbines. However, the relation between the energy obtained with actual devices and the economic and environmental cost of their installation limits the practical application of these solutions. In order to optimize the design of this technology and achieve its successful installation and use, a detailed knowledge about the energy potential of tides at the specific location is necessary. This calculation is not easy and requires the use of specialized software tools. Currently, there is no specific software to evaluate the tidal currents energy potential, but there are more than a few codes able to calculate the hydraulic flow in rivers, estuaries and coastal regions. These programs are usually used for the calculation of pollutant dispersion and floods, but they can be adapted with more or less success. This paper reviews the available 1D, 2D, and 3D software tools with the aim of analyzing their functionality and their validity to evaluate the energy potential of tidal currents.
María José Suárez-López; Rodolfo Espina-Valdés; Víctor Manuel Fernández Pacheco; Antonio Navarro Manso; Eduardo Blanco-Marigorta; Eduardo Alvarez Alvarez. A Review of Software Tools to Study the Energetic Potential of Tidal Currents. Energies 2019, 12, 1673 .
AMA StyleMaría José Suárez-López, Rodolfo Espina-Valdés, Víctor Manuel Fernández Pacheco, Antonio Navarro Manso, Eduardo Blanco-Marigorta, Eduardo Alvarez Alvarez. A Review of Software Tools to Study the Energetic Potential of Tidal Currents. Energies. 2019; 12 (9):1673.
Chicago/Turabian StyleMaría José Suárez-López; Rodolfo Espina-Valdés; Víctor Manuel Fernández Pacheco; Antonio Navarro Manso; Eduardo Blanco-Marigorta; Eduardo Alvarez Alvarez. 2019. "A Review of Software Tools to Study the Energetic Potential of Tidal Currents." Energies 12, no. 9: 1673.
Eduardo Alvarez-Alvarez; Aitor Fernandez-Jimenez; Manuel Rico-Secades; Antonio Javier Calleja-Rodriguez; Joaquin Fernandez-Francos; Mario Alvarez-Fernandez. Water Tunnel to test and characterization of experimental designs of Hydrokinetics Turbines. Workrooms Journal 2018, 1, 1 .
AMA StyleEduardo Alvarez-Alvarez, Aitor Fernandez-Jimenez, Manuel Rico-Secades, Antonio Javier Calleja-Rodriguez, Joaquin Fernandez-Francos, Mario Alvarez-Fernandez. Water Tunnel to test and characterization of experimental designs of Hydrokinetics Turbines. Workrooms Journal. 2018; 1 (6):1.
Chicago/Turabian StyleEduardo Alvarez-Alvarez; Aitor Fernandez-Jimenez; Manuel Rico-Secades; Antonio Javier Calleja-Rodriguez; Joaquin Fernandez-Francos; Mario Alvarez-Fernandez. 2018. "Water Tunnel to test and characterization of experimental designs of Hydrokinetics Turbines." Workrooms Journal 1, no. 6: 1.
Obtaining energy from tide currents in onshore locations is of great interest due to the proximity to the points of consumption. This opens the door to the feasibility of new installations based on hydrokinetic microturbines even in zones of moderate speed. In this context, the accuracy of energy predictions based on hydrodynamic models is of paramount importance. This research presents a high precision methodology based on a multidimensional hydrodynamic model that is used to study the energetic potential in estuaries. Moreover, it is able to estimate the flow variations caused by microturbine installations. The paper also shows the results obtained from the application of the methodology in a study of the Nalón river mouth (Asturias, Spain).
Nicolás Badano; Rodolfo Espina Valdés; Eduardo Álvarez Álvarez. Tidal current energy potential of Nalón river estuary assessment using a high precision flow model. Open Engineering 2018, 8, 118 -123.
AMA StyleNicolás Badano, Rodolfo Espina Valdés, Eduardo Álvarez Álvarez. Tidal current energy potential of Nalón river estuary assessment using a high precision flow model. Open Engineering. 2018; 8 (1):118-123.
Chicago/Turabian StyleNicolás Badano; Rodolfo Espina Valdés; Eduardo Álvarez Álvarez. 2018. "Tidal current energy potential of Nalón river estuary assessment using a high precision flow model." Open Engineering 8, no. 1: 118-123.
In the hot-rolled steel production processes, the cooling control after finishing rolling plays an important role on the final microstructure and mechanical properties of the product. Steel coils produced after lamination must be cooled from a high temperature to the ambient temperature, to be transported and sold. Usually, the coil is stored in a warehouse until it reaches the ambient temperature. Cooling process takes between 4 and 6 days, depending on weather conditions. A new methodology to obtain the coil cooling law has been developed in this paper. Numerical models were used to simulate and study the rate of the coil cooling and to obtain the values of the parameters involved in the cooling law. The geometry of the coil is a hollow cylinder with a height between 1.6 and 1.8 m and an outer diameter of about 0.9 m. Simulations of the coil cooling process were performed by using CFD techniques with ANSYS FLUENT software in transient conditions for 2D (two-dimensional) and 3D (three-dimensional) geometries to obtain the optimal rate of temperature decrease. Vertical and horizontal arrangements of the coils and also a different number of coils and rows were studied. A new equation (cooling law) based on logarithmic and arctangent terms was obtained. This equation describes conduction, convection, and radiations effects that have been proposed and verified, considering the boundary restrictions of the problem.
Doddy Irawan; Antonio J. Gutiérrez-Trashorras; Eduardo Álvarez-Álvarez; Eduardo Blanco-Marigorta. A new methodology to calculate the cooling law of steel mill lamination coils. The International Journal of Advanced Manufacturing Technology 2018, 97, 1873 -1884.
AMA StyleDoddy Irawan, Antonio J. Gutiérrez-Trashorras, Eduardo Álvarez-Álvarez, Eduardo Blanco-Marigorta. A new methodology to calculate the cooling law of steel mill lamination coils. The International Journal of Advanced Manufacturing Technology. 2018; 97 (5-8):1873-1884.
Chicago/Turabian StyleDoddy Irawan; Antonio J. Gutiérrez-Trashorras; Eduardo Álvarez-Álvarez; Eduardo Blanco-Marigorta. 2018. "A new methodology to calculate the cooling law of steel mill lamination coils." The International Journal of Advanced Manufacturing Technology 97, no. 5-8: 1873-1884.
Francisco J. Rubio-Serrano; Antonio J. Gutierrez Trashorras; Fernando Soto-Pérez; Eduardo Alvarez Alvarez; Eduardo Blanco-Marigorta. Advantages of incorporating Hygroscopic Cycle Technology to a 12.5-MW biomass power plant. Applied Thermal Engineering 2018, 131, 320 -327.
AMA StyleFrancisco J. Rubio-Serrano, Antonio J. Gutierrez Trashorras, Fernando Soto-Pérez, Eduardo Alvarez Alvarez, Eduardo Blanco-Marigorta. Advantages of incorporating Hygroscopic Cycle Technology to a 12.5-MW biomass power plant. Applied Thermal Engineering. 2018; 131 ():320-327.
Chicago/Turabian StyleFrancisco J. Rubio-Serrano; Antonio J. Gutierrez Trashorras; Fernando Soto-Pérez; Eduardo Alvarez Alvarez; Eduardo Blanco-Marigorta. 2018. "Advantages of incorporating Hygroscopic Cycle Technology to a 12.5-MW biomass power plant." Applied Thermal Engineering 131, no. : 320-327.
Eduardo Alvarez Alvarez; M. Rico-Secades; Emilio Lopez Corominas; N. Huerta-Medina; J. Soler Guitart. Design and control strategies for a modular hydroKinetic smart grid. International Journal of Electrical Power & Energy Systems 2018, 95, 137 -145.
AMA StyleEduardo Alvarez Alvarez, M. Rico-Secades, Emilio Lopez Corominas, N. Huerta-Medina, J. Soler Guitart. Design and control strategies for a modular hydroKinetic smart grid. International Journal of Electrical Power & Energy Systems. 2018; 95 ():137-145.
Chicago/Turabian StyleEduardo Alvarez Alvarez; M. Rico-Secades; Emilio Lopez Corominas; N. Huerta-Medina; J. Soler Guitart. 2018. "Design and control strategies for a modular hydroKinetic smart grid." International Journal of Electrical Power & Energy Systems 95, no. : 137-145.
Air pollution is one of the major environmental problems, especially in industrial and highly populated areas. Remote sensing image is a rich source of information with many uses. This paper is focused on estimation of air pollutants using Landsat-5 TM and Landsat-8 OLI satellite images. Particulate Matter with particle size less than 10 microns (PM10) is estimated for the study area of Principado de Asturias (Spain). When a satellite records the radiance of the surface received at sensor, does not represent the true radiance of the surface. A noise caused by Aerosol and Particulate Matters attenuate that radiance. In many applications of remote sensing, that noise called path radiance is removed during pre-processing. Instead, path radiance was used to estimate the PM10 concentration in the air. A relationship between the path radiance and PM10 measurements from ground stations has been established using Random Forest (RF) algorithm and a PM10 map was generated for the study area. The results show that PM10 estimation through satellite image is an efficient technique and it is suitable for local and regional studies.
V. M. Fernández-Pacheco; C. A. López-Sánchez; E. Álvarez-Álvarez; M. J. Suárez López; L. García-Expósito; E. Antuña Yudego; J. L. Carús-Candás. Estimation of PM10 Distribution using Landsat5 and Landsat8 Remote Sensing. Proceedings 2018, 2, 1430 .
AMA StyleV. M. Fernández-Pacheco, C. A. López-Sánchez, E. Álvarez-Álvarez, M. J. Suárez López, L. García-Expósito, E. Antuña Yudego, J. L. Carús-Candás. Estimation of PM10 Distribution using Landsat5 and Landsat8 Remote Sensing. Proceedings. 2018; 2 (23):1430.
Chicago/Turabian StyleV. M. Fernández-Pacheco; C. A. López-Sánchez; E. Álvarez-Álvarez; M. J. Suárez López; L. García-Expósito; E. Antuña Yudego; J. L. Carús-Candás. 2018. "Estimation of PM10 Distribution using Landsat5 and Landsat8 Remote Sensing." Proceedings 2, no. 23: 1430.
Antonio J. Gutierrez Trashorras; Eunice Villicana Ortiz; Eduardo Alvarez Alvarez; Juan Manuel Gonzalez-Caballin; Jorge Xiberta-Bernat; Maria Jose Suarez Lopez. Attenuation processes of solar radiation. Application to the quantification of direct and diffuse solar irradiances on horizontal surfaces in Mexico by means of an overall atmospheric transmittance. Renewable and Sustainable Energy Reviews 2018, 81, 93 -106.
AMA StyleAntonio J. Gutierrez Trashorras, Eunice Villicana Ortiz, Eduardo Alvarez Alvarez, Juan Manuel Gonzalez-Caballin, Jorge Xiberta-Bernat, Maria Jose Suarez Lopez. Attenuation processes of solar radiation. Application to the quantification of direct and diffuse solar irradiances on horizontal surfaces in Mexico by means of an overall atmospheric transmittance. Renewable and Sustainable Energy Reviews. 2018; 81 ():93-106.
Chicago/Turabian StyleAntonio J. Gutierrez Trashorras; Eunice Villicana Ortiz; Eduardo Alvarez Alvarez; Juan Manuel Gonzalez-Caballin; Jorge Xiberta-Bernat; Maria Jose Suarez Lopez. 2018. "Attenuation processes of solar radiation. Application to the quantification of direct and diffuse solar irradiances on horizontal surfaces in Mexico by means of an overall atmospheric transmittance." Renewable and Sustainable Energy Reviews 81, no. : 93-106.
The present project aims to design the control and monitoring system for a test bench that will help to calculate the power level that can be extracted from wind vertical axis hydrokinetic microturbines. The workbench includes a hydraulic system calculated to, through a recirculation between two tanks, achieve high fluid speed in the canal, and the monitoring and power electronics systems to adjust different hydraulic parameters and to control the operation of the microturbine under test, providing the necessary measures to obtain the power coefficient versus tip speed ratio (Cp-λ) curves of the microturbine which will help to extract the Maximum Power Point.
Mario Álvarez Fernández; Samuel Camba Fernández; Aitor Fernández Jiménez; Manuel Rico-Secades; Eduardo Álvarez Álvarez; Antonio J. Calleja Rodríguez. Control and Monitoring System for Hydraulic Microturbines Test Benches. Proceedings 2018, 2, 1445 .
AMA StyleMario Álvarez Fernández, Samuel Camba Fernández, Aitor Fernández Jiménez, Manuel Rico-Secades, Eduardo Álvarez Álvarez, Antonio J. Calleja Rodríguez. Control and Monitoring System for Hydraulic Microturbines Test Benches. Proceedings. 2018; 2 (23):1445.
Chicago/Turabian StyleMario Álvarez Fernández; Samuel Camba Fernández; Aitor Fernández Jiménez; Manuel Rico-Secades; Eduardo Álvarez Álvarez; Antonio J. Calleja Rodríguez. 2018. "Control and Monitoring System for Hydraulic Microturbines Test Benches." Proceedings 2, no. 23: 1445.
Atmospheric pollution is one of the biggest problems and concerns in modern society, especially in industrial and highly populated areas. Poor air quality can have adverse impact on human health and ecosystems. For this reason, air quality forecasting becomes increasingly important, especially for governments and administrations, which use these predictions to enhance the design of mitigation actions in order to reduce air pollution in urban areas. In this framework, process of pollutant dispersion simulation is the best way to predict the most affected areas by industrial and other kinds of emissions. To carry out these simulations, there is a great number of computational tools currently available. However, not all of them have the same functionalities, nor can they be applied to the same case studies, so it is necessary to establish the advantages and disadvantages of each one of them in order to choose the most suitable tool in each case. Therefore, the objective of this paper is to identify the main available simulation tools and to make a comparative review between them in order to define advantages and disadvantages.
E. Antuña Yudego; Jl. Carús Candás; E. Álvarez Álvarez; Mj. Suárez López; L. García; Vm. Fernández-Pacheco. Computational Tools for Analysing Air Pollutants Dispersion: A Comparative Review. Proceedings 2018, 2, 1408 .
AMA StyleE. Antuña Yudego, Jl. Carús Candás, E. Álvarez Álvarez, Mj. Suárez López, L. García, Vm. Fernández-Pacheco. Computational Tools for Analysing Air Pollutants Dispersion: A Comparative Review. Proceedings. 2018; 2 (23):1408.
Chicago/Turabian StyleE. Antuña Yudego; Jl. Carús Candás; E. Álvarez Álvarez; Mj. Suárez López; L. García; Vm. Fernández-Pacheco. 2018. "Computational Tools for Analysing Air Pollutants Dispersion: A Comparative Review." Proceedings 2, no. 23: 1408.
Air pollution is one of the consequences of the industrial development, which causes a lot of health and environmental problems. For these reasons, the quality of the air is one of the major concerns of regional, national and European governments. All of them are developing strict normative to reduce the emissions of contaminants. The quality of the air can be analysed by means of numerical simulations. In this paper, a methodology based on Computational Fluid Dynamics (CFD) is described. This technique allows evaluating the dispersion of industrial-type air pollutants in a relatively large area, taking into account the orography, buildings and so on. Also, specific models are studied in order to consider the specific characteristics of the industrial contaminants and particles.
María José Suárez López; Laura García Expósito; Eduardo Blanco Marigorta; Eduardo Álvarez Álvarez; Antonio Navarro Manso; Víctor Manuel Fernández Pacheco; Elena Antuña Yudego; Juan Luis Carús Candás. Methodology for the Study of the Air Dispersion of the Industrial Contaminants Taking into Account the Orography. Proceedings 2018, 2, 1414 .
AMA StyleMaría José Suárez López, Laura García Expósito, Eduardo Blanco Marigorta, Eduardo Álvarez Álvarez, Antonio Navarro Manso, Víctor Manuel Fernández Pacheco, Elena Antuña Yudego, Juan Luis Carús Candás. Methodology for the Study of the Air Dispersion of the Industrial Contaminants Taking into Account the Orography. Proceedings. 2018; 2 (23):1414.
Chicago/Turabian StyleMaría José Suárez López; Laura García Expósito; Eduardo Blanco Marigorta; Eduardo Álvarez Álvarez; Antonio Navarro Manso; Víctor Manuel Fernández Pacheco; Elena Antuña Yudego; Juan Luis Carús Candás. 2018. "Methodology for the Study of the Air Dispersion of the Industrial Contaminants Taking into Account the Orography." Proceedings 2, no. 23: 1414.
Las fuentes de energía renovables han registrado en los últimos años un aumento de la potencia instalada a nivel mundial sin precedentes. Frente a las ventajas que ofrecen se debe considerar un importante inconveniente: la intermitencia e irregularidad de los recursos renovables. En este escenario resurgen las centrales hidráulicas reversibles, como una forma eficaz de almacenamiento de excedentes energéticos que permite adecuar en cada momento la curva de oferta a la demanda del sistema. En el presente trabajo se realiza un estudio de viabilidad simplificado de la transformación parcial de la central hidroeléctrica de La Barca, en Asturias, al modo reversible mediante la creación de un algoritmo que simula su operación en función de los precios del mercado, considerando la participación en el mercado de gestión de desvíos. Para su conversión se indica brevemente las modificaciones técnicas requeridas. Los resultados de beneficios estimados para la misma apuntan finalmente a la viabilidad positiva del proyecto.
E. Antuña Yudego; Eduardo Alvarez Alvarez. Estudio de viabilidad de la transformación parcial de una central de turbinado simple en reversible: el caso de la central hidráulica de La Barca (Asturias, España). Ingeniería del agua 2017, 21, 1 .
AMA StyleE. Antuña Yudego, Eduardo Alvarez Alvarez. Estudio de viabilidad de la transformación parcial de una central de turbinado simple en reversible: el caso de la central hidráulica de La Barca (Asturias, España). Ingeniería del agua. 2017; 21 (1):1.
Chicago/Turabian StyleE. Antuña Yudego; Eduardo Alvarez Alvarez. 2017. "Estudio de viabilidad de la transformación parcial de una central de turbinado simple en reversible: el caso de la central hidráulica de La Barca (Asturias, España)." Ingeniería del agua 21, no. 1: 1.
Eduardo Alvarez Alvarez; Manuel Rico Secades; Daniel Fernández Suárez; Antonio J. Gutierrez Trashorras; Joaquín Fernández-Francos. Obtaining energy from tidal microturbines: A practical example in the Nalón River. Applied Energy 2016, 183, 100 -112.
AMA StyleEduardo Alvarez Alvarez, Manuel Rico Secades, Daniel Fernández Suárez, Antonio J. Gutierrez Trashorras, Joaquín Fernández-Francos. Obtaining energy from tidal microturbines: A practical example in the Nalón River. Applied Energy. 2016; 183 ():100-112.
Chicago/Turabian StyleEduardo Alvarez Alvarez; Manuel Rico Secades; Daniel Fernández Suárez; Antonio J. Gutierrez Trashorras; Joaquín Fernández-Francos. 2016. "Obtaining energy from tidal microturbines: A practical example in the Nalón River." Applied Energy 183, no. : 100-112.