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In most steelmaking processes, huge amounts of waste heat at high temperature (700–800 °C) are thrown into the environment without any use. An alternative use for this waste heat is electricity generation through thermoelectric generators. However, these high temperatures, as well as their fluctuations over time, affect not only the conversion rate of the thermoelectric generator but also its useful lifetime. The incorporation of a latent thermal energy storage (TES) system could be a solution; nevertheless, the thermal stability and corrosive effect of the (PCM) phase change material are key aspects for the thermal storage system definition, in terms of durability. In this work, developed in the framework of the European project “PowGETEG” (RFSR-CT-2015-00028, funded by the Research Fund for Coal and Steel), a high-temperature analysis (700–800 °C) of the Li2CO3 thermal properties, thermal stability and corrosive effect on the AISI 304 and AISI 310 stainless steels is carried out. The results show that the eutectic salt Li2CO3 exhibits high thermal stability with neither change in its thermal properties nor material degradation. This work shows that lithium carbonate Li2CO3 and AISI 310 make a very good combination for the definition of a thermal storage system able to protect a high-temperature thermoelectric converter from temperature variations, making it more reliable.
Gorka Argandoña; Maite Aresti; Jesus M. Blanco; Esteban Muel; Jesús Esarte. Li2CO3 as Protection for a High-Temperature Thermoelectric Generator: Thermal Stability and Corrosion Analysis. Applied Sciences 2021, 11, 7597 .
AMA StyleGorka Argandoña, Maite Aresti, Jesus M. Blanco, Esteban Muel, Jesús Esarte. Li2CO3 as Protection for a High-Temperature Thermoelectric Generator: Thermal Stability and Corrosion Analysis. Applied Sciences. 2021; 11 (16):7597.
Chicago/Turabian StyleGorka Argandoña; Maite Aresti; Jesus M. Blanco; Esteban Muel; Jesús Esarte. 2021. "Li2CO3 as Protection for a High-Temperature Thermoelectric Generator: Thermal Stability and Corrosion Analysis." Applied Sciences 11, no. 16: 7597.
The interaction of oblique water waves with a land-fixed Oscillating Water Column (OWC) type wave energy converter is examined. Two-dimensional linear wave theory is used to formulate the mathematical problem. The matched eigenfunction expansion method (EEM) using dual series relations and the Boundary Element Method (BEM) with quadratic elements are utilized to solve the associated boundary value problem (BVP). The novelty of the present work lies on addressing the influence of oblique water waves on the OWC efficiency and the use of dual series relations to solve this type of BVP. Variations of the hydrodynamic efficiency with the wave angle of incidence, and with the chamber length and front barrier draft to water depth ratios are discussed. Both analytical and numerical results were found to be in good agreement. Findings revealed that by increasing the angle of incidence, a broader hydrodynamic efficiency band and a higher wave frequency at which resonance occurs are both obtained. This aspect may offer benefits to wave power extraction in real sea conditions for fixed OWC devices. Finally, cases published in the specialized literature were recovered and very good agreement was achieved.
Ayrton Alfonso Medina Rodríguez; Alejandro Martínez Flores; Jesús María Blanco Ilzarbe; Rodolfo Silva Casarín. Interaction of oblique waves with an Oscillating Water Column device. Ocean Engineering 2021, 228, 108931 .
AMA StyleAyrton Alfonso Medina Rodríguez, Alejandro Martínez Flores, Jesús María Blanco Ilzarbe, Rodolfo Silva Casarín. Interaction of oblique waves with an Oscillating Water Column device. Ocean Engineering. 2021; 228 ():108931.
Chicago/Turabian StyleAyrton Alfonso Medina Rodríguez; Alejandro Martínez Flores; Jesús María Blanco Ilzarbe; Rodolfo Silva Casarín. 2021. "Interaction of oblique waves with an Oscillating Water Column device." Ocean Engineering 228, no. : 108931.
In the field of experimental tests in 2D wave tanks, it is of vital importance to know the reflection generated by the structures responsible for dissipating the waves that reach the end of the installation. The field of application of this type of tanks is wide and is generally directly related to technology, structures, and, in general, systems that perform their functions in the sea environment. During the process of validating the behavior of these systems, scale models of the prototypes are usually tested in wave tanks, minimizing the influence of the waves reflected in the physical limits of the tank itself. In this regard, the present work has characterized the phenomenon of dissipation and reflection of the incident wave on a mobile solid structure placed at one end of a 2D wave tank, defining the dependence of the dissipation and reflection phenomenon for each typology. wave (heights and periods) and the geometric arrangement of the solid surface. The experimental work contains a total of 256 individual tests, where the interaction of 8 monochromatic waves with different height, period, wavelength and depth has been characterized. These waves have interacted with 10 beach positions with different inclination angles (between 8 and 26º). For all the cases, the reflection coefficient has been extracted from the envelope curve resulting from the superposition of the incident wave and the reflected wave in the structure. The result of the study provides optimal inclination positions of the parabolic absorption system that minimize the reflection coefficient. The results are expressed as a function of the properties of the incident waves and on the corresponding Iribarren dimensionless number.
Gustavo Adolfo Esteban Alcala; Asier Vazquez Clemente; Iñigo Albaina-Lopez DE Armentia; Urko Izquierdo Ereño; Alberto Peña Bandres; Jesus Maria Blanco Ilzarbe; Iñigo Bidaguren Diego. EXPERIMENTAL STUDY OF REFLECTION IN A PARABOLIC WAVE DISSIPATION SYSTEM FOR A 2D WAVE FLUME. DYNA 2021, 96, 159 -165.
AMA StyleGustavo Adolfo Esteban Alcala, Asier Vazquez Clemente, Iñigo Albaina-Lopez DE Armentia, Urko Izquierdo Ereño, Alberto Peña Bandres, Jesus Maria Blanco Ilzarbe, Iñigo Bidaguren Diego. EXPERIMENTAL STUDY OF REFLECTION IN A PARABOLIC WAVE DISSIPATION SYSTEM FOR A 2D WAVE FLUME. DYNA. 2021; 96 (1):159-165.
Chicago/Turabian StyleGustavo Adolfo Esteban Alcala; Asier Vazquez Clemente; Iñigo Albaina-Lopez DE Armentia; Urko Izquierdo Ereño; Alberto Peña Bandres; Jesus Maria Blanco Ilzarbe; Iñigo Bidaguren Diego. 2021. "EXPERIMENTAL STUDY OF REFLECTION IN A PARABOLIC WAVE DISSIPATION SYSTEM FOR A 2D WAVE FLUME." DYNA 96, no. 1: 159-165.
The thermal behavior of three different walls, made with and without by-products, is assessed by means of the Finite Element Method, aiming to evaluate its performance in terms of the sustainable construction of the blocks. Results were compared to those obtained from an experimental campaign, aiming at validation of the model. The by-products used for the blocks were “lime sludge” and “sawdust”, whose performance was compared against the traditional blocks made of concrete as a reference, aiming to demonstrate its sustainability, showing decreases of the thermal transmittance up to 10.5%. Additionally, following the same methodology, the thermal behavior of these above-mentioned blocks but now with added internal insulation made of “recycled cellulose” was assessed, showing higher decreases up to 25.5%, increasing sustainability by addressing an additional reduction in waste, so the right combination of using by-products and the insulating filler in their cavities has been revealed as a promising way of optimizing the walls, offering a relevant improvement in energy savings. Finally, when comparing the U-values of the blocks made of concrete without insulation versus those made of by-products, with insulation, improvements up to 33.3% were reached. The adaptation of the procedure through a moisture correction factor was also incorporated.
Jesús Blanco; Yokasta Frómeta; Maggi Madrid; Jesús Cuadrado. Thermal Performance Assessment of Walls Made of Three Types of Sustainable Concrete Blocks by Means of FEM and Validated through an Extensive Measurement Campaign. Sustainability 2021, 13, 386 .
AMA StyleJesús Blanco, Yokasta Frómeta, Maggi Madrid, Jesús Cuadrado. Thermal Performance Assessment of Walls Made of Three Types of Sustainable Concrete Blocks by Means of FEM and Validated through an Extensive Measurement Campaign. Sustainability. 2021; 13 (1):386.
Chicago/Turabian StyleJesús Blanco; Yokasta Frómeta; Maggi Madrid; Jesús Cuadrado. 2021. "Thermal Performance Assessment of Walls Made of Three Types of Sustainable Concrete Blocks by Means of FEM and Validated through an Extensive Measurement Campaign." Sustainability 13, no. 1: 386.
This study aimed to adjust the turbulence models to the real behavior of the numerical wave flume (NWF) and the future research that will be carried out on it, according to the turbulence model that best adjusts to each particular case study. The k-ε, k-ω and large-eddy simulation (LES) models, using the volume of fluid (VOF) method, were analyzed and compared respectively. The wavemaker theory was followed to faithfully reproduce the waves, which were measured in an experimental wave flume (EWF) and compared with the theory to validate each turbulence model. Besides, reflection was measured with the Mansard and Funke method, which has shown promising results when studying one of the most critical turbulent behaviors in the wave flume, called the breaking of the waves. The free surface displacement obtained with each turbulence model was compared with the recorded signals located at three points of the experimental wave flume, in the time domain of each run, respectively. Finally, the calculated reflection coefficients and the amplitudes of the reflected waves were compared, aiming to have a better understanding of the wave reflection process at the extinction zone. The research showed good agreement between all the experimental signals and the numerical outcomes for all the turbulence models analyzed.
Lander Galera-Calero; Jesús Blanco; Urko Izquierdo; Gustavo Esteban. Performance Assessment of Three Turbulence Models Validated through an Experimental Wave Flume under Different Scenarios of Wave Generation. Journal of Marine Science and Engineering 2020, 8, 881 .
AMA StyleLander Galera-Calero, Jesús Blanco, Urko Izquierdo, Gustavo Esteban. Performance Assessment of Three Turbulence Models Validated through an Experimental Wave Flume under Different Scenarios of Wave Generation. Journal of Marine Science and Engineering. 2020; 8 (11):881.
Chicago/Turabian StyleLander Galera-Calero; Jesús Blanco; Urko Izquierdo; Gustavo Esteban. 2020. "Performance Assessment of Three Turbulence Models Validated through an Experimental Wave Flume under Different Scenarios of Wave Generation." Journal of Marine Science and Engineering 8, no. 11: 881.
After overcoming the economic crisis that originated in 2008, in recent years concern about the influence of Energy on Climate Change has reappeared. Society as a whole, governments and public administrations and companies in the energy sector, due to their involvement in the matter, were immersed in analyzing to what extent the effects of the current energy model on Climate Change could be reduced or eliminated.
Jesus Maria Blanco Ilzarbe; Juan Carlos Ramos Gonzalez. ENERGY AND CLIMATE CHANGE IN THE POST-COVID-19 SCENARIO. DYNA 2020, 95, 570 -571.
AMA StyleJesus Maria Blanco Ilzarbe, Juan Carlos Ramos Gonzalez. ENERGY AND CLIMATE CHANGE IN THE POST-COVID-19 SCENARIO. DYNA. 2020; 95 (1):570-571.
Chicago/Turabian StyleJesus Maria Blanco Ilzarbe; Juan Carlos Ramos Gonzalez. 2020. "ENERGY AND CLIMATE CHANGE IN THE POST-COVID-19 SCENARIO." DYNA 95, no. 1: 570-571.
The design of effective and economically viable wave energy devices involves complex decision-making about the product based on conceptual design information, including stakeholder requirements, functions, components and technical parameters. The great diversity of concepts makes it extremely difficult to create fair comparisons of the relative merits of the many different designs. Conventional design approaches have proved insufficient to guarantee wave energy technologies meet their technical and economic goals. Systems engineering can provide a suitable framework to overcome the obstacles towards a successful wave energy technology. The main objective of this work is to review the well-established systems engineering approaches that have been successfully implemented in complex engineering problems and to what extent they have been applied to wave energy technology development. The paper first reviews how system information can be organised in different design domains to guide the synthesis and analysis activities and the definition of requirements and metrics, as well as the search for solutions and decision-making. Then, an exhaustive literature review on the application of systems engineering approaches to wave energy development is presented per design domain. Finally, a set of conclusions is drawn, along with some suggestions for improving the effectiveness of wave energy technology development.
Pablo Ruiz-Minguela; Vincenzo Nava; Jonathan Hodges; Jesús M. Blanco. Review of Systems Engineering (SE) Methods and Their Application to Wave Energy Technology Development. Journal of Marine Science and Engineering 2020, 8, 823 .
AMA StylePablo Ruiz-Minguela, Vincenzo Nava, Jonathan Hodges, Jesús M. Blanco. Review of Systems Engineering (SE) Methods and Their Application to Wave Energy Technology Development. Journal of Marine Science and Engineering. 2020; 8 (10):823.
Chicago/Turabian StylePablo Ruiz-Minguela; Vincenzo Nava; Jonathan Hodges; Jesús M. Blanco. 2020. "Review of Systems Engineering (SE) Methods and Their Application to Wave Energy Technology Development." Journal of Marine Science and Engineering 8, no. 10: 823.
Based on the two-dimensional linear wave theory, the effects of the front wall thickness and the bottom profile of an Oscillating Water Column (OWC) device on its efficiency were analyzed. Using the potential flow approach, the solution of the associated boundary value problem was obtained via the boundary element method (BEM). Numerical results for several physical parameters and configurations were obtained. The effects of the front wall thickness on the efficiency are discussed in detail, then, various configurations of the chamber bottom are presented. A wider efficiency band was obtained with a thinner front wall. In a real scenario having a thinner front wall means that such a structure could have less capacity to withstand the impact of storm waves. Applying the model for the case of the Mutriku Wave Energy Plant (MWEP), findings showed that the proposed bottom profiles alter the efficiency curve slightly; higher periods of the incoming water waves were found. This could increase the efficiency of the device in the long-wave regime. Finally, the numerical results were compared with those available in the literature, and were found to be in good agreement.
Ayrton Alfonso Medina Rodriguez; Jesús Marìa Blanco Ilzarbe; Rodolfo Silva Casarìn; Urko Izquierdo Ereño. The Influence of the Chamber Configuration on the Hydrodynamic Efficiency of Oscillating Water Column Devices. Journal of Marine Science and Engineering 2020, 8, 751 .
AMA StyleAyrton Alfonso Medina Rodriguez, Jesús Marìa Blanco Ilzarbe, Rodolfo Silva Casarìn, Urko Izquierdo Ereño. The Influence of the Chamber Configuration on the Hydrodynamic Efficiency of Oscillating Water Column Devices. Journal of Marine Science and Engineering. 2020; 8 (10):751.
Chicago/Turabian StyleAyrton Alfonso Medina Rodriguez; Jesús Marìa Blanco Ilzarbe; Rodolfo Silva Casarìn; Urko Izquierdo Ereño. 2020. "The Influence of the Chamber Configuration on the Hydrodynamic Efficiency of Oscillating Water Column Devices." Journal of Marine Science and Engineering 8, no. 10: 751.
Trailing edge flaps (TEFs) are high-lift devices that generate changes in the lift and drag coefficients of an airfoil. A large number of 2D simulations are performed in this study, in order to measure these changes in aerodynamic coefficients and to analyze them for a given Reynolds number. Three different airfoils, namely NACA 0012, NACA 64(3)-618, and S810, are studied in relation to three combinations of the following parameters: angle of attack, flap angle (deflection), and flaplength. Results are in concordance with the aerodynamic results expected when studying a TEF on an airfoil, showing the effect exerted by the three parameters on both aerodynamic coefficients lift and drag. Depending on whether the airfoil flap is deployed on either the pressure zone or the suction zone, the lift-to-drag ratio, CL/CD, will increase or decrease, respectively. Besides, the use of a larger flap length will increase the higher values and decrease the lower values of the CL/CD ratio. In addition, an artificial neural network (ANN) based prediction model for aerodynamic forces was built through the results obtained from the research.
Igor Rodriguez-Eguia; Iñigo Errasti; Unai Fernandez-Gamiz; Jesús María Blanco; Ekaitz Zulueta; Aitor Saenz-Aguirre. A Parametric Study of Trailing Edge Flap Implementation on Three Different Airfoils Through an Artificial Neuronal Network. Symmetry 2020, 12, 828 .
AMA StyleIgor Rodriguez-Eguia, Iñigo Errasti, Unai Fernandez-Gamiz, Jesús María Blanco, Ekaitz Zulueta, Aitor Saenz-Aguirre. A Parametric Study of Trailing Edge Flap Implementation on Three Different Airfoils Through an Artificial Neuronal Network. Symmetry. 2020; 12 (5):828.
Chicago/Turabian StyleIgor Rodriguez-Eguia; Iñigo Errasti; Unai Fernandez-Gamiz; Jesús María Blanco; Ekaitz Zulueta; Aitor Saenz-Aguirre. 2020. "A Parametric Study of Trailing Edge Flap Implementation on Three Different Airfoils Through an Artificial Neuronal Network." Symmetry 12, no. 5: 828.
The building sector presents poor performance in terms of energy efficiency and is looking for effective alternatives aimed at reducing the use of fossil fuels. The facade is a key element able to harness renewable energy as an Active Solar Thermal Facade (ASTF). The main purpose of this study is the assessment of a novel design concept based on a steel sandwich panel technology. The performance of the active system will be first addressed by a parametric study in order to analyze its behavior and secondly, by describing a real case based on an experimental test by connecting the active panels to a heat pump. The study shows the impact of solar irradiation and mass flow on the thermal jump achieved, while ambient and fluid inlet temperatures are the most influencing parameters in the efficiency of the facade. When coupled to the heat pump, results from a measurement campaign demonstrate a remarkable improvement in the performance of the ASTF. The results presented provide significant proof about the benefits of a synergetic combination of both technologies—solar facades and heat pumps—as efficient alternatives for the building sector, aiming to improve energy efficiency as well as reduce their dependence on non-renewable sources.
Peru Elguezabal; Alex Lopez; Jesus Maria Blanco; Jose Antonio Chica. Assessment on the Efficiency of an Active Solar Thermal Facade: Study of the Effect of Dynamic Parameters and Experimental Analysis When Coupled/Uncoupled to a Heat Pump †. Energies 2020, 13, 597 .
AMA StylePeru Elguezabal, Alex Lopez, Jesus Maria Blanco, Jose Antonio Chica. Assessment on the Efficiency of an Active Solar Thermal Facade: Study of the Effect of Dynamic Parameters and Experimental Analysis When Coupled/Uncoupled to a Heat Pump †. Energies. 2020; 13 (3):597.
Chicago/Turabian StylePeru Elguezabal; Alex Lopez; Jesus Maria Blanco; Jose Antonio Chica. 2020. "Assessment on the Efficiency of an Active Solar Thermal Facade: Study of the Effect of Dynamic Parameters and Experimental Analysis When Coupled/Uncoupled to a Heat Pump †." Energies 13, no. 3: 597.
The use of renewable energy sources is a clear commitment in the process of developing alternatives to reduce the high energy consumption in buildings. Although with intermittent production, renewable energies are unlimited and have a demonstrated potential to be integrated within buildings. The facade is a key element in a strategic position for harnessing renewable solar energy by means of the Active Solar Façade concept. Through a CFD model, a parametric study has been developed to evaluate different alternatives in the design of an Active Solar Facade, composed by a sandwich panel as unglazed solar collector. The high influence of the conductivity together with the absorptivity has been demonstrated. Directly linked to the material selection for solving the absorber and the hydraulic circuit, the advantage of metals compared with plastics, has been verified. The minor effect of the insulation has also been analyzed, although the necessity of a minimum quantity has been stated looking to avoid significant heat losses. Additionally, the performance of the system has been evaluated in order to determine the potentially achievable energy. The result of the extensive campaign monitored in KUBIK® and developed in different days in a period of 12 months, has resulted in an average daily production of 320Wh / m2. This study highlights the potential benefits of this type of solutions and the necessity to properly dimension and design them. In such way it is aimed to contribute to a greater use of renewable energy in buildings, and consequently for reducing the use of fossil fuels, by means of alternatives that enable the mitigation of the climate change. Keywords: Solar Active Façade; Sandwich Panels; Unglazed and Integrated Solar Collector; Solar Production; CFD Model; Parametric Assessment.
Peru Elguezabal Esnarrizaga; Alex Lopez Dominguez; Jesus Maria Blanco Ilzarbe; José Antonio Chica Páez. NEW CONCEPT OF SOLAR COLLECTOR INTEGRATED INTO A SANDWICH PANEL AS AN ACTIVE FAÇADE; CFD BASED PARAMETRIC ASSESSMENT AND CASE STUDY. DYNA 2019, 94, 691 -697.
AMA StylePeru Elguezabal Esnarrizaga, Alex Lopez Dominguez, Jesus Maria Blanco Ilzarbe, José Antonio Chica Páez. NEW CONCEPT OF SOLAR COLLECTOR INTEGRATED INTO A SANDWICH PANEL AS AN ACTIVE FAÇADE; CFD BASED PARAMETRIC ASSESSMENT AND CASE STUDY. DYNA. 2019; 94 (1):691-697.
Chicago/Turabian StylePeru Elguezabal Esnarrizaga; Alex Lopez Dominguez; Jesus Maria Blanco Ilzarbe; José Antonio Chica Páez. 2019. "NEW CONCEPT OF SOLAR COLLECTOR INTEGRATED INTO A SANDWICH PANEL AS AN ACTIVE FAÇADE; CFD BASED PARAMETRIC ASSESSMENT AND CASE STUDY." DYNA 94, no. 1: 691-697.
A wave flume of 12.5 x 0.6 x 0.7 m (length x width x height) able to reproduce the ocean conditions of the most representative research facilities in the Basque Country (BiMEP-Biscay Marine Energy Platform and Mutriku Wave Energy Plant) has been recently installed at the laboratory of Fluid Mechanics of the Faculty of Engineering in Bilbao. This new facility has the capacity of producing a wide range of monochromatic and panchromatic waves by a piston-type wavemaker. Several ultrasonic wave probes measure the surface elevation, and the wave energy is dissipated in a passive parabolic beach in order to diminish significantly the reflection along the flume. A numerical model based on Reynolds Averaged Navier Stokes (RANS) equations has been developed to represent the turbulence and Eulerian Volume of Fluid (VOF) unsteady approach in STAR-CCM+ CFD code to track the evolution of the free surface. This numerical model has been validated with the corresponding experimental campaign covering a wide range of depths, wave heights, wavelengths and periods. Tests focused on the description of the basic hydrodynamic processes of wave generation and propagation, giving as a result the definition of the wavemaker to produce the required wave. Results were analysed together with the analytical solution based on potential flow theory. The experiments carried out in the present study establish the operational limits of the wave flume in terms of wave generation, propagation and extinction, defining the operational range of future experimental campaigns where wave interaction with floating structures, wave energy converters and mooring systems will be studied. Keywords: experimental wave flume, numerical wave flume validation, wave characterisation, BiMEP, renewable marine energy, CFD models
Urko Izquierdo Ereño; Lander Galera Calero; Iñigo Albaina-Lopez DE Armentia; Gustavo Adolfo Esteban Alcala; Ander Aristondo DE Miguel; Jesus Maria Blanco Ilzarbe. EXPERIMENTAL AND NUMERICAL CHARACTERISATION OF A 2D WAVE FLUME. DYNA 2019, 94, 662 -668.
AMA StyleUrko Izquierdo Ereño, Lander Galera Calero, Iñigo Albaina-Lopez DE Armentia, Gustavo Adolfo Esteban Alcala, Ander Aristondo DE Miguel, Jesus Maria Blanco Ilzarbe. EXPERIMENTAL AND NUMERICAL CHARACTERISATION OF A 2D WAVE FLUME. DYNA. 2019; 94 (1):662-668.
Chicago/Turabian StyleUrko Izquierdo Ereño; Lander Galera Calero; Iñigo Albaina-Lopez DE Armentia; Gustavo Adolfo Esteban Alcala; Ander Aristondo DE Miguel; Jesus Maria Blanco Ilzarbe. 2019. "EXPERIMENTAL AND NUMERICAL CHARACTERISATION OF A 2D WAVE FLUME." DYNA 94, no. 1: 662-668.
Ramon Sancibrian; Angel Sedano; Esther G. Sarabia; Jesus M. Blanco. Hybridizing differential evolution and local search optimization for dimensional synthesis of linkages. Mechanism and Machine Theory 2019, 140, 389 -412.
AMA StyleRamon Sancibrian, Angel Sedano, Esther G. Sarabia, Jesus M. Blanco. Hybridizing differential evolution and local search optimization for dimensional synthesis of linkages. Mechanism and Machine Theory. 2019; 140 ():389-412.
Chicago/Turabian StyleRamon Sancibrian; Angel Sedano; Esther G. Sarabia; Jesus M. Blanco. 2019. "Hybridizing differential evolution and local search optimization for dimensional synthesis of linkages." Mechanism and Machine Theory 140, no. : 389-412.
Jesus M Blanco; A. Buruaga; J. Cuadrado; A. Zapico. Assessment of the influence of façade location and orientation in indoor environment of double-skin building envelopes with perforated metal sheets. Building and Environment 2019, 163, 1 .
AMA StyleJesus M Blanco, A. Buruaga, J. Cuadrado, A. Zapico. Assessment of the influence of façade location and orientation in indoor environment of double-skin building envelopes with perforated metal sheets. Building and Environment. 2019; 163 ():1.
Chicago/Turabian StyleJesus M Blanco; A. Buruaga; J. Cuadrado; A. Zapico. 2019. "Assessment of the influence of façade location and orientation in indoor environment of double-skin building envelopes with perforated metal sheets." Building and Environment 163, no. : 1.
The building sector has a poor performance in terms of energy efficiency and is looking for alternatives to reduce the use of fossil fuels on building use stage. Renewables are unlimited and solar thermal energy is a technology with a demonstrated potential. The façade is a key element able to harness renewable energy coming from the sun becoming in an Active Solar Thermal Façade (ASTF). The main purpose of this study is the development of a parametric study using a numerical model to analyze the behavior of an unglazed solar collector. Thus, evaluating different design and meteorological parameters to show their influence on the heat transfer and the efficiency. The study shows that solar irradiation and mass flow are the most influential on thermal difference. However, for the efficiency ambient temperature and inlet temperature both are the most influencing ones. In brief, a set of parameters have a significant influence on the behavior of the ASTF that are fully governed by environmental conditions. Nevertheless, there are some other parameters that can be controlled during the operation. The challenge is to make a continuous configuration of this adaptable values depending on the external situation to achieve a higher performance for the ASTF.
Peru Elguezabal; Alex Lopez; Jesús María Blanco; José Antonio Chica. Parametric assessment of a building active façade by means of a combined metallic sandwich panel with an unglazed solar collector. MATEC Web of Conferences 2019, 282, 02046 .
AMA StylePeru Elguezabal, Alex Lopez, Jesús María Blanco, José Antonio Chica. Parametric assessment of a building active façade by means of a combined metallic sandwich panel with an unglazed solar collector. MATEC Web of Conferences. 2019; 282 ():02046.
Chicago/Turabian StylePeru Elguezabal; Alex Lopez; Jesús María Blanco; José Antonio Chica. 2019. "Parametric assessment of a building active façade by means of a combined metallic sandwich panel with an unglazed solar collector." MATEC Web of Conferences 282, no. : 02046.
The names of the authors were incorrect in the published paper and should be revised as “Patricia Fernandez-Waid, Guzman Diez, Iñigo Bidaguren, Urtzi Izagirre, Jesus Maria Blanco, Manu Soto”.
Patricia Fernandez-Waid; Guzman Diez; Iñigo Bidaguren; Urtzi Izagirre; Jesus M Blanco; Manu Soto. Erratum to: Morphological Characterization and Hydrodynamic Behavior of Shortfin Mako Shark (Isurus oxyrinchus) Dorsal Fin Denticles. Journal of Bionic Engineering 2019, 16, 965 -965.
AMA StylePatricia Fernandez-Waid, Guzman Diez, Iñigo Bidaguren, Urtzi Izagirre, Jesus M Blanco, Manu Soto. Erratum to: Morphological Characterization and Hydrodynamic Behavior of Shortfin Mako Shark (Isurus oxyrinchus) Dorsal Fin Denticles. Journal of Bionic Engineering. 2019; 16 (5):965-965.
Chicago/Turabian StylePatricia Fernandez-Waid; Guzman Diez; Iñigo Bidaguren; Urtzi Izagirre; Jesus M Blanco; Manu Soto. 2019. "Erratum to: Morphological Characterization and Hydrodynamic Behavior of Shortfin Mako Shark (Isurus oxyrinchus) Dorsal Fin Denticles." Journal of Bionic Engineering 16, no. 5: 965-965.
I. Zabala; João Henriques; Jesus M Blanco; A. Gomez; L.M.C. Gato; I. Bidaguren; A.F.O. Falcão; A. Amezaga; Rui Gomes. Wave-induced real-fluid effects in marine energy converters: Review and application to OWC devices. Renewable and Sustainable Energy Reviews 2019, 111, 535 -549.
AMA StyleI. Zabala, João Henriques, Jesus M Blanco, A. Gomez, L.M.C. Gato, I. Bidaguren, A.F.O. Falcão, A. Amezaga, Rui Gomes. Wave-induced real-fluid effects in marine energy converters: Review and application to OWC devices. Renewable and Sustainable Energy Reviews. 2019; 111 ():535-549.
Chicago/Turabian StyleI. Zabala; João Henriques; Jesus M Blanco; A. Gomez; L.M.C. Gato; I. Bidaguren; A.F.O. Falcão; A. Amezaga; Rui Gomes. 2019. "Wave-induced real-fluid effects in marine energy converters: Review and application to OWC devices." Renewable and Sustainable Energy Reviews 111, no. : 535-549.
Active façade systems incorporating solar thermal collectors currently offer very promising energetic solutions. From among the available systems, a simple solution is the unglazed heat collector for potential integration in low-temperature applications. However, when adopting system definitions, the modification of some design parameters and their impact has to be fully understood. In this study, the case of an unglazed collector integrated into a sandwich panel is assessed and a specific analysis is performed for a proper assessment of the influence of key design parameters. Based on that case study of the real built system, a CFD model is developed and validated and a parametric assessment is then performed, by altering the configurations of both the panel and the hydraulic circuit. In this way, the potential of each measure to harness solar energy can be evaluated and each parameter with its different level of impact can be highlighted, to identify those of higher relevance. A characterization of the real solution completes the study, by providing the efficiency curves and the total energy collected during the experimental campaign. The maximum estimate of the efficiency of a 6 m2 façade was within a range between 0.47 and 0.34 and the heat loss factor was between 4.8 and 7.5. The case study exercises reveal the real energy efficiency and solar production patterns. There was also an opportunity to consider significant improvements to increase the output of the active façade. The main conclusions concerned the different criteria that improved the definition of the system and greater comprehension of alternative designs that may be integrated in the underlying concept.
P. Elguezabal; Alexander Lopez-Dominguez; J.M. Blanco; J.A. Chica. CFD model-based analysis and experimental assessment of key design parameters for an integrated unglazed metallic thermal collector façade. Renewable Energy 2019, 146, 1766 -1780.
AMA StyleP. Elguezabal, Alexander Lopez-Dominguez, J.M. Blanco, J.A. Chica. CFD model-based analysis and experimental assessment of key design parameters for an integrated unglazed metallic thermal collector façade. Renewable Energy. 2019; 146 ():1766-1780.
Chicago/Turabian StyleP. Elguezabal; Alexander Lopez-Dominguez; J.M. Blanco; J.A. Chica. 2019. "CFD model-based analysis and experimental assessment of key design parameters for an integrated unglazed metallic thermal collector façade." Renewable Energy 146, no. : 1766-1780.
The primary wick in a loop heat pipe device is a key component that is central to the operation of the device. Both high permeability and capillary pumping capacity, two properties highly dependent on wick structure, are strongly desirable for a satisfactory thermal performance. In this paper, selective laser melting (SLM), a three-dimensional (3D) printing technology, is used to create a primary wick for an 80 W heat transfer application. The permeability and capillarity values of this wick, experimentally measured, are compared with those built with the most widely used technologies nowadays, such as powder sintering and meshes. In this study, the SLM scaffold is shown to satisfy the minimum values required by the application in terms of capillarity and permeability: 0.031 mm/s and 4 × 10−12 m2, respectively. Our comparative study revealed that the wick produced with the SLM technology presented higher values of permeability, by two orders of magnitude, and slightly higher capillary figures than those corresponding to powder sintering for such application. However, it had capillary values well below those of a stainless-steel mesh. The hydraulic behavior of the SLM wick was better than that of the sintered copper powder, because it not only met the above-mentioned specifications, but it also improved its performance.
Jesús Esarte; Jesús M. Blanco; Angela Bernardini; Ramón Sancibrián. Performance Assessment of a Three-Dimensional Printed Porous Media Produced by Selective Laser Melting Technology for the Optimization of Loop Heat Pipe Wicks. Applied Sciences 2019, 9, 2905 .
AMA StyleJesús Esarte, Jesús M. Blanco, Angela Bernardini, Ramón Sancibrián. Performance Assessment of a Three-Dimensional Printed Porous Media Produced by Selective Laser Melting Technology for the Optimization of Loop Heat Pipe Wicks. Applied Sciences. 2019; 9 (14):2905.
Chicago/Turabian StyleJesús Esarte; Jesús M. Blanco; Angela Bernardini; Ramón Sancibrián. 2019. "Performance Assessment of a Three-Dimensional Printed Porous Media Produced by Selective Laser Melting Technology for the Optimization of Loop Heat Pipe Wicks." Applied Sciences 9, no. 14: 2905.
The present study examines thermal NOx formation on a laminar hydrogen diffusion flame based on a patented multi-flame diffusion burner installed in a domestic boiler. The analysis is performed through CFD modeling by means of ANSYS-FLUENT 19.0. Detailed chemical, thermal, and transport parameters are implemented, in order to obtain accurate results using finite-rate chemistry together with laminar and low-Reynolds turbulence models. The Damköhler number is calculated using a Matlab code developed in-house. The chemical kinetics of the thermal NOx route are analyzed for several inlet flame power levels, so as to demonstrate the effectiveness of the flame-splitting method at reducing the formation of thermal NOx. The numerical results are contrasted through measurements from literature for validation purposes. In the present work, the flame power is varied from 0.05 kW up to 0.8 kW. In contrast to turbulent non-premixed hydrogen flames, the numerical results provide a quasi-constant trend in thermal NOx formation at higher power levels (0.4–0.8 kW). The heat exchange rate between the flame and the combustion chamber and its influence on thermal NOx formation are all carefully analyzed.
G. Lopez-Ruiz; A.R. Fernandez-Akarregi; L. Diaz; I. Urresti; I. Alava; J.M. Blanco. Numerical study of a laminar hydrogen diffusion flame based on the non-premixed finite-rate chemistry model; thermal NO assessment. International Journal of Hydrogen Energy 2019, 44, 20426 -20439.
AMA StyleG. Lopez-Ruiz, A.R. Fernandez-Akarregi, L. Diaz, I. Urresti, I. Alava, J.M. Blanco. Numerical study of a laminar hydrogen diffusion flame based on the non-premixed finite-rate chemistry model; thermal NO assessment. International Journal of Hydrogen Energy. 2019; 44 (36):20426-20439.
Chicago/Turabian StyleG. Lopez-Ruiz; A.R. Fernandez-Akarregi; L. Diaz; I. Urresti; I. Alava; J.M. Blanco. 2019. "Numerical study of a laminar hydrogen diffusion flame based on the non-premixed finite-rate chemistry model; thermal NO assessment." International Journal of Hydrogen Energy 44, no. 36: 20426-20439.