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Listar por palabra clave "Energy conversion"

Mostrando ítems 1-19 de 19

A Methodology for Measuring Turbocharger Adiabatic Maps in a Gas-Stand and Its Usage for Calibrating Control Oriented and One-Dimensional Models at Early ICE Design Stages

Serrano, J.R.; Arnau Martínez, Francisco José; García-Cuevas González, Luis Miguel; Gómez-Vilanova, Alejandro; Guilain, Stephane; Batard, Samuel (ASME International, 2021-04-01)

[EN] In this work, a methodology is proposed to standardize turbochargers testing based on measuring the maps twice: in close to adiabatic and in diathermal conditions. Along the paper, it is discussed with special detail ...
Computational assessment towards understanding the energy conversion and combustion process of lean mixtures in passive pre-chamber ignited engines

Benajes, Jesús; Novella Rosa, Ricardo; Gómez-Soriano, Josep; Barbery-Avila, Ibrahim Ignacio; Libert, C.; Rampanarivo, F.; Dabiri, M. (Elsevier, 2020-09)

[EN] In this paper, a computational study was performed using a combination of several numerical tools to better understand the limiting aspects of combustion in a passive pre-chamber ignition system when operating at lean ...
Energy conversion from external fluctuating signals based on asymmetric nanopores

Ramirez Hoyos, Patricio; Gómez Lozano, Vicente; Cervera, Javier; Nasir, Saima; Ali, Mubarak; Ensinger, Wolfgang; Mafe, Salvador (Elsevier, 2015-09)

Electrical transduction from fluctuating external signals is central to energy conversion based on nanoscale electrochemical devices and bioelectronics interfaces. We demonstrate theoretically and experimentally a ...
Evaluation of Er Doped CeO2-delta as Oxygen Transport Membrane

Balaguer Ramirez, Maria; Solis, Cecilia; Escolástico Rozalén, Sonia; García-Fayos, Julio; Serra Alfaro, José Manuel (MDPI AG, 2022-02)

[EN] Ceria based materials are robust candidates for a range of applications involving redox reactions and high oxygen activity. The substitution of erbium in the ceria lattice introduces extrinsic oxygen vacancies. Further ...
Exploring the passive the pre-chamber ignition concept for spark-ignition engines fueled with natural gas under EGR-diluted conditions

Novella Rosa, Ricardo; Gómez-Soriano, Josep; Barbery-Avila, Ibrahim Ignacio; Martinez-Hernandiz, P.J. (Elsevier, 2024-05-01)

[EN] The pre-chamber ignition system has demonstrated to be a suitable technology for increasing burning rates while reducing the cycle-to-cycle variability in spark-ignition engines. This concept offers an improvement in ...
Generation of MoS2 quantum dots by laser ablation of MoS2 particles in suspension and their photocatalytic activity for H-2 generation

Garcia-Baldovi, Hermenegildo; Latorre Sánchez, Marcos; Esteve-Adell, Iván; Kham, Anish; Asiri, Abdullah M.; Kosa, Samia A.; García Gómez, Hermenegildo (Springer-Verlag, 2016)

[EN] MoS2 quantum dots (QDs) have been obtained in colloidal suspensions by 532 nm laser ablation (7 ns fwhp/pulse, 50 mJ/pulse) of commercial MoS2 particles in acetonitrile. High-resolution transmission electron microscopy ...
Harnessing Infrared Photons for Photoelectrochemical Hydrogen Generation. A PbS Quantum Dot Based "Quasi-Artificial Leaf"

Trevisan, Roberto; Rodenas, Pau; González-Pedro, Victoria; Sima, Cornelia; Sánchez, Rafael S.; Barea, Eva M.; Mora-Sero, Iván; Fabregat-Santiago, Francisco; Gimenez, Sixto (American Chemical Society, 2013-01-03)

[EN] Hydrogen generation by using quantum dot (QD) based heterostructures has emerged as a promising strategy to develop artificial photosynthesis devices. In the present study, we sensitize mesoporous TiO2 electrodes with ...
HD Diesel engine equipped with a bottoming Rankine cycle as a waste heat recovery system. Part 1: Study and analysis of the waste heat energy

Dolz Ruiz, Vicente; Novella Rosa, Ricardo; García Martínez, Antonio; Sánchez Serrano, Jaime (Elsevier, 2012-04)

This paper describes the study of different bottoming Rankine cycles with water-steam and/or ORC configurations in classical and innovative setups such as a waste heat recovery system in a Heavy Duty Diesel (HDD) Engine. ...
HD Diesel engine equipped with a bottoming Rankine cycle as a waste heat recovery system. Part 2: Evaluation of alternative solutions

Serrano Cruz, José Ramón; Dolz Ruiz, Vicente; Novella Rosa, Ricardo; García Martínez, Antonio (Elsevier, 2012-04)

A theoretical investigation has been performed on the feasibility of introducing a waste heat recovery (WHR) system in a two-stage turbocharged HDD engine. The WHR is attained by introducing a Rankine cycle, which uses an ...
Hydraulic Machinery for Energy Conversion: A Renewable Source from Big to Small Solutions

López Jiménez, Petra Amparo; Pérez Sánchez, Modesto (2022-08-02)

El consumo energético de la sociedad a nivel mundial se ha incrementado hasta en un 600% en el último siglo. Este aumento ha sido el resultado directo del crecimiento de la población desde la revolución industrial, en la ...
Nanostructured hybrid ZnO thin films for energy conversion

Moya Forero, Mónica Mercedes; ANURA SAMANTILLEKE; Mollar García, Miguel Alfonso; Marí Soucase, Bernabé (SpringerOpen, 2011)

We report on hybrid films based on ZnO/organic dye prepared by electrodeposition using tetrasulfonated copper phthalocyanines (TS-CuPc) and Eosin-Y (EoY). Both the morphology and porosity of hybrid ZnO films are highly ...
Net currents obtained from zero-average potentials in single amphoteric nanopores

Ramirez Hoyos, Patricio; Gómez Lozano, Vicente; Ali, Mubarak; Ensinger, Wolfgang; Mafé, Salvador (Elsevier, 2013-06)

We have studied experimentally and theoretically the rectifying properties of a single asymmetric nanopore functionalized with amphoteric lysine groups and characterized the net current obtained with zero-average time ...
Ni-doped (CeO2-delta)-YSZ mesoarchitectured with nanocrystalline framework: the effect of thermal treatment on structure, surface chemistry and catalytic properties in the partial oxidation of methane (CPOM)

Somacescu, Simona; Florea, Mihaela; Osiceanu, Petre; Calderon-Moreno, Jose Maria; Ghica, Corneliu; Serra Alfaro, José Manuel (Springer Verlag (Germany), 2015-11-03)

Ni-doped (CeO2-delta)-YSZ (5 mol% Ni oxide, 10 mol% ceria) mesoarchitectures (MA) with nanocrystalline framework have been synthesized by an original, facile and cheap approach based on Triton X100 nonionic surfactant as ...
Numerical analysis of the passive pre-chamber ignition concept for light duty applications

Novella Rosa, Ricardo; Gómez-Soriano, Josep; Barbery-Avila, Ibrahim Ignacio; Cédric Libert (Elsevier, 2022-08)

[EN] The use of advanced ignition concepts and enhanced combustion strategies is being widely studied for modern engine applications. In this framework, the passive pre-chamber ignition system is gaining popularity for its ...
Numerical evaluation of a solar-assisted jet-ejector refrigeration system: Screening of environmentally friendly refrigerants

Galindo, José; Dolz, Vicente; García-Cuevas González, Luis Miguel; Ponce-Mora, Alberto (Elsevier, 2020-04-15)

[EN] The present paper evaluates numerically the feasibility of a solar jet-ejector refrigeration system from an efficiency maximization perspective with three low environmental impact refrigerants, namely, R1234yf, R1234ze ...
Optimizing Energy Transduction of Fluctuating Signals with Nanofluidic Diodes and Load Capacitors

Ramirez Hoyos, Patricio; Cervera Montesinos, Javier; Gómez Lozano, Vicente; Ali, Mubarak; Nasir, Saima; Ensinger, Wolfgang; Mafé, Salvador (John Wiley & Sons, 2018)

[EN] The design and experimental implementation of hybrid circuits is considered allowing charge transfer and energy conversion between nanofluidic diodes in aqueous ionic solutions and conventional electronic elements ...
Performance of a transmutation advanced device for sustainable energy application

Garcia Hernandez, Carlos Rafael; Rosales, J.; García Fajardo, Laura; Pérez-Navarro Gómez, Ángel; Escrivá, A.; Abánades, A. (Elsevier, 2011-11)

[EN] Preliminary studies have been performed to design a device for nuclear waste transmutation and hydrogen generation based on a gas-cooled pebble bed accelerator driven system, TADSEA (Transmutation Advanced Device for ...
Seasonal performance assessment of sanitary hot water production systems using propane and CO2 heat pumps

Tammaro, M.; Montagud, C.; Corberán, J.M.; Mauro, A.W.; Mastrullo, R. (Elsevier, 2017)

[EN] This paper presents an experimental analysis and performance evaluation of a ground source heat pumpsystem providing heating/cooling to an office building, located at the Universitat Politècnica de Valènciain Spain. ...
Selecting a Pump Working As Turbine (PAT): Some Non-Dimensional Numbers Based on the Best Efficiency Point

López Jiménez, Petra Amparo (2022-08-02)

El funcionamiento de las bombas en modo turbina conlleva grandes implicaciones energéticas. La determinación de la utilidad concreta de una máquina u otra para un cierto punto de recuperación de energía depende de las ...