Listar por autor "Lamas, M.I."
Mostrando ítems 21-40 de 42
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Marine Engines Performance and Emissions II
Lamas, M.I. (MDPI, 2022-12-12) -
Multi-criteria analysis to determine the most appropriate fuel composition in an ammonia/diesel oil dual fuel engine
Rodríguez, Carlos G.; Lamas, M.I.; Rodríguez-García, JuanDeDios; Abbas, Amr (MDPI, 2023-03-24)[Abstract] The possibility to employ alternative fuels is gaining special interest in the marine sector. There are several suitable candidates for traditional fossil fuels substitution. Among them, ammonia is a promising ... -
NOₓ Reduction in Diesel-Hydrogen Engines Using Different Strategies of Ammonia Injection
Lamas, M.I.; Rodríguez, C.G. (MDPI, 2019-04)[Abstract] In order to reduce NOₓ emissions in internal combustion engines, the present work analyzes a measurement which consists of injecting ammonia directly into the combustion chamber. A commercial compression ignition ... -
Numerical Analysis of Emissions from Marine Engines Using Alternative Fuels
Lamas, M.I.; Rodríguez, C.G.; Rodríguez-García, JuanDeDios; Telmo Miranda, Javier (Sciendo, 2015-12-30)[Abstract]: The current restrictions on emissions from marine engines, particularly sulphur oxides (SOx ), nitrogen oxides (NOx ) and carbon dioxide (CO2 ), are compelling the shipping industry to a change of tendency. In ... -
Numerical Analysis of NOₓ Reduction Using Ammonia Injection and Comparison With Water Injection
Lamas, M.I.; Castro-Santos, Laura; Rodríguez, C.G. (MDPI, 2020)[Abstract] This work analyzes NOₓ reduction in a marine diesel engine using ammonia injection directly into the cylinder and compares this procedure with water injection. A numerical model based on the so-called inert ... -
Numerical analysis of several port configurations in the Fairbanks-Morse 38D8-1/8 opposed piston marine engine
Lamas, M.I.; Rodríguez, Carlos G.; Rodríguez-García, JuanDeDios; Telmo Miranda, Javier (University of Zagreb. Faculty of Mechanical Engineering and Naval Architecture, 2015)[Abstract] The aim of the present paper is to analyze several port configurations in the Fairbanks-Morse 38D8-1/8 marine diesel engine. The motivation comes from the high number of intake and exhaust ports which characterizes ... -
Numerical and experimental analysis of the velocity field inside an artificial reef. Application to the Ares-Betanzos estuary
Santiago Caamaño, Lucía; Lamas, M.I.; Carballo, Rodrigo; López, I.; Cartelle Barros, Juan José; Carral Couce, Luis (MDPI, 2022-11-28)[Abstract]: The placement of artificial reef (AR) units on the seabed modifies the velocity field of the water, making the nutrients circulate properly and creating the necessary habitat for the settlement of the desired ... -
Numerical Model of SO2 Scrubbing with Seawater Applied to Marine Engines
Lamas, M.I.; Rodríguez, C.G.; Rodríguez-García, JuanDeDios; Telmo Miranda, Javier (Sciendo, 2016-06-30)[Abstract]: The present paper proposes a CFD model to study sulphur dioxide (SO2) absorption in seawater. The focus is on the treatment of marine diesel engine exhaust gas. Both seawater and distilled water were compared ... -
Numerical Model to Analyze the Physicochemical Mechanisms Involved in CO₂ Absorption by an Aqueous Ammonia Droplet
Lamas, M.I.; Rodríguez-García, JuanDeDios; Rebollido Lorenzo, José Manuel (MDPI, 2021-04)[Abstract] CO₂ is the main anthropogenic greenhouse gas and its reduction plays a decisive role in reducing global climate change. As a CO₂ elimination method, the present work is based on chemical absorption using aqueous ... -
Numerical modeling in energy and environment
Lamas, M.I. (MDPI, 2023-01) -
Opening or Not Opening Educational Centers in Time of SARS-CoV-2? Analysis of the Situation in Galicia (Spain)
Filgueira-Vizoso, Almudena; Castro-Santos, Laura; García-Diez, Ana; Puime Guillén, Félix; Lamas, M.I.; Graña-López, Manuel Ángel (MDPI, 2022-05-05)[Abstract] The appearance of the SARS-CoV-2 pandemic on the world stage has implemented changes in all social activities and, therefore, in teaching at all educational levels. On the one hand, it is argued that the closure ... -
Optimization of a Multiple Injection System in a Marine Diesel Engine through a Multiple-Criteria Decision-Making Approach
Lamas, M.I.; Castro-Santos, Laura; Rodríguez, Carlos G. (MDPI, 2020)[Abstract] In this work, a numerical model was developed to analyze the performance and emissions of a marine diesel engine, the Wärtsilä 6L 46. This model was validated using experimental measurements and was employed to ... -
Optimization of a nature-inspired shape for a vertical axis wind turbine through a numerical model and an artificial neural network
Blanco Damota, Daniel; Rodríguez-García, JuanDeDios; Couce-Casanova, Antonio; Telmo Miranda, Javier; Caccia, Claudio Giovanni; Lamas, M.I. (MDPI, 2022-08-11)[Abstract] The present work proposes an artificial neural network (ANN) to analyze vertical axis wind turbines of the Savonius type. These turbines are appropriate for low wind velocities due to their low starting torque. ... -
Possibilities of Ammonia as Both Fuel and NOᵪ Reductant in Marine Engines: A Numerical Study
Rodríguez, Carlos G.; Lamas, M.I.; Rodríguez-García, JuanDeDios; Abbas, Amr (MDPI, 2022-01)[Abstract] Nowadays, the environmental impact of shipping constitutes an important challenge. In order to achieve climate neutrality as soon as possible, an important priority consists of progressing on the decarbonization ... -
Problemas resueltos de transmisión de calor
Lamas, M.I. (Universidade da Coruña, Servizo de Publicacións, 2022) -
Proposal of a Nature-Inspired Shape for a Vertical Axis Wind Turbine and Comparison of Its Performance with a Semicircular Blade Profile
Blanco, Javier; Rodríguez-García, JuanDeDios; Couce-Casanova, Antonio; Lamas, M.I. (MDPI, 2021)[Abstract] In order to improve the efficiency of the Savonius type vertical axis wind turbine, the present work analyzes an improvement based on an innovative rotor geometry. The rotor blades are inspired on an organic ... -
Proposed Conceptual Framework to Design Artificial Reefs Based on Particular Ecosystem Ecology Traits
Carral Couce, Luis; Lamas, M.I.; Cartelle Barros, Juan José; López, I.; Carballo, Rodrigo (MDPI, 2022-04-28)[Abstract] Overfishing and pollution have led to marine habitat degradation, and as a result, marine fisheries are now in decline. Consequently, there is a real need to enhance marine ecosystems while halting the decline ... -
Reconversion of the shipbuilding sector: from production by project to mass production. What is its effect on the LCOE of a wave energy farm?
Castro-Santos, Laura; Rubial Yáñez, Pablo; Lamas, M.I.; Cordal Iglesias, David; Alcayde, A.; Montoya, F.G.; Filgueira-Vizoso, Almudena (European Association for the Development of Renewable Energy, Environment and Power Quality (EA4EPQ), 2023-07)[Abstract]: The objective of this work has been to analyze the variation of different economic parameters (Levelized Cost Of Energy and Internal Rate of Return) for two possible ways of manufacturing: production by project ... -
Sensitivity Study of the Economics of a Floating Offshore Wind Farm. The Case Study of the SATH® Concrete Platform in the Atlantic Waters of Europe
Filgueira-Vizoso, Almudena; Cordal Iglesias, David; Puime Guillén, Félix; Lamas, M.I.; Martínez-Rubio, Araceli; Larrinaga-Calderón, Irati; Castro-Santos, Laura (Elsevier, 2023)[Abstract]: The objective of the present work is to develop a sensitivity analysis to determine the most essential parameters that affects to the economic feasibility of a marine wind farm composed by platforms built in ... -
STEMbach Experiences at Higher Education
Castro-Santos, Laura; Puime Guillén, Félix; Lamas, M.I.; García-Diez, Ana; Enríquez-Díaz, Joaquín; Boedo, Lucía; Lagoa-Varela, Dolores; Álvarez García, Begoña; Filgueira-Vizoso, Almudena (De Gruyter Open Ltd, 2023-01)[Abstract]: The aim of this work is to describe several experiences of STEMbach in different areas: engineering, economics, materials, etc. The STEMbach is a program carried out by high school students during their two ...