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Listar por autor "Olmeda González, Pablo César"

Mostrando ítems 1-20 de 123

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A Combination of Swirl Ratio and Injection Strategy to Increase Engine Efficiency

Olmeda, P.; Martín, J.; García Martínez, Antonio; Villalta-Lara, David; Warey, Alok; Domenech Llopis, Vicente (SAE International, 2017)

[EN] Growing awareness about CO2 emissions and their environmental implications are leading to an increase in the importance of thermal efficiency as criteria to design internal combustion engines (ICE). Heat transfer to ...
A complete 0D thermodynamic predictive model for direct injection diesel engines

Payri González, Francisco; Olmeda, P.; Martín Díaz, Jaime; García Martínez, Antonio (Elsevier, 2011-06-01)

[EN] Ideal models provide the simplest way to reproduce internal combustion engine (ICE) cycles, but they usually do not represent with sufficient accuracy the actual behaviour of an ICE. A suitable alternative for research ...
A contribution to the global modeling of heat transfer processes in Diesel engines

Salvador Iborra, Josep (Universitat Politècnica de València, 2020-09-02)

[EN] Current challenges in research and development of powertrains demand new computational tools capable of simulating vehicle operation under very diverse conditions. This is due, among other reasons, to new homologation ...
A generalized equivalent circuit model for lithium-iron phosphate batteries

Torregrosa, A. J.; Broatch, A.; Olmeda, P.; Agizza, Luca (Elsevier, 2023-12-01)

[EN] Most of the equivalent circuit battery models available in the literature have been developed specifically for one cell and require extensive measurements to calibrate cell electrical parameters in different operating ...
A generalized methodology for lithium-ion cells characterization and lumped electro-thermal modelling

Broatch, A.; Olmeda, P.; Margot , Xandra; Agizza, Luca (Elsevier, 2022-11-25)

[EN] This paper deals with the experimental characterization and electro-thermal modeling of lithium-ion batteries. This aspect is of considerable importance to be able to have an understanding of the phenomena of heat ...
A holistic methodology to correct heat transfer and bearing friction losses from hot turbocharger maps in order to obtain adiabatic efficiency of the turbomachinery

Serrano, J.R.; Olmeda, P.; Arnau Martínez, Francisco José; Samala, Vishnu (SAGE Publications, 2020-10)

[EN] Turbocharger performance maps provided by manufacturers are usually far from the assumption of reproducing the isentropic performance. The reason being, those maps are usually measured using a hot gas stand. The ...
A new methodology for uncertainties characterization in combustion diagnosis and thermodynamic modelling

Benajes Calvo, Jesus Vicente; Olmeda González, Pablo Cesar; Martín Díaz, Jaime; Carreño Arango, Ricardo (Elsevier, 2014-10-05)

Combustion diagnosis based on in-cylinder pressure signals as well as 0D thermodynamic modelling, are widely used to study and optimize the combustion in reciprocating engines. Both approaches share some uncertainties ...
A New Tool to Perform Global Energy Balances in DI Diesel Engines 2014-01-0665

Payri González, Francisco; Olmeda González, Pablo Cesar; Martín Díaz, Jaime; Carreño, Ricardo (SAE International, 2014)

[EN] The generalization of exhaust aftertreatment systems along with the growing awareness about climate change is leading to an increasing importance of the efficiency over other criteria during the design of reciprocating ...
A Note on Bubble Sizes in Subcooled Flow Boiling at Low Velocities in Internal Combustion Engine-Like Conditions

Torregrosa, A. J.; Broatch, A.; Olmeda, P.; Cornejo-Luna, Omar (Isfahan University of Technology, 2016-09)

[EN] Current trends in engine design indicate the necessity to take advantage of the highest rates of heat transfer associated with nucleate boiling, mostly at high engine loads. When used in conjunction with advanced ...
A one-dimensional modeling study on the effect of advanced insulation coatings on internal combustión engine efficiency

Broatch, A.; Olmeda, P.; Margot, Xandra Marcelle; Gómez-Soriano, Josep (SAGE Publications, 2021-07-01)

[EN] This article presents a study of the impact on engine efficiency of the heat loss reduction due to in-cylinder coating insulation. A numerical methodology based on one-dimensional heat transfer model is developed. ...
A semi-empirical model of the calendar ageing of lithium-ion batteries aimed at automotive and deep-space applications

Torregrosa, A. J.; Broatch, A.; Olmeda, P.; Agizza, Luca (Elsevier, 2024-03-01)

[EN] Lithium-ion batteries are highly affected by calendar ageing effects, which can lead to capacity loss even when the battery is not used at all. The current literature proposes plenty of semi-empirical models to predict ...
A study on the internal convection in small turbochargers. Proposal of heat transfer convective coefficients

Serrano Cruz, José Ramón; Olmeda González, Pablo Cesar; Arnau Martínez, Francisco José; Reyes Belmonte, Miguel Ángel; Tartoussi, Hadi (Elsevier, 2015-10-05)

Nowadays turbochargers play an important role in improving internal combustion engines (ICE) performance. Usually, engine manufacturers use computer codes to predict the behaviour of both engine and turbocharger, the ...
A tool for predicting the thermal performance of a diesel engine

Torregrosa, A. J.; Olmeda González, Pablo Cesar; Martín Díaz, Jaime; Romero Piedrahita, Carlos Alberto (Taylor & Francis, 2011)

This paper presents a thermal network model for the simulation of the transient response of diesel engines. The model was adjusted by using experimental data from a completely instrumented engine run under steady-state ...
Adaptive determination of cut-off frequencies for filtering the in-cylinder pressure in diesel engines combustion analysis

Payri González, Francisco; Olmeda González, Pablo Cesar; Guardiola García, Carlos; Martín Díaz, Jaime (Elsevier, 2011-10)

[EN] In-cylinder pressure analysis is a key tool for engine research and diagnosis and it has been object of study from the beginning of the internal combustion engines. One of its most useful application is combustion ...
An adapted heat transfer model for engines with tumble motion

Olmeda González, Pablo Cesar; Martín Díaz, Jaime; Novella Rosa, Ricardo; Carreño, Ricardo (Elsevier, 2015-11-15)

In the last years, a growing interest about increasing the engine efficiency has led to the development of new engine technologies. The accurate determination of the heat transfer across the combustion chamber walls is ...
Analysis and Methodology to Characterize Heat Transfer Phenomena in Automotive Turbochargers

Serrano Cruz, José Ramón; Olmeda González, Pablo Cesar; Arnau Martínez, Francisco José; Dombrovsky, A.; Smith, L. (American Society of Mechanical Engineers (ASME), 2015-02)

In the present work a comprehensive study of turbocharger heat transfer phenomena is discussed, showing their relevance compared to gas enthalpy variations through the turbomachinery. The study provides an experimental ...
Analysis of the energy balance during World harmonized Light vehicles Test Cycle in warmed and cold conditions using a Virtual Engine

Olmeda, P.; Martín, Jaime; Arnau Martínez, Francisco José; Artham, Sushma (SAGE Publications, 2020-08)

[EN] In recent years, the interests on transient operation and real driving emissions have increased because of the global concern about environmental pollution that has led to new emissions regulation and new standard ...
Analysis of the improvement of a lithium-ion battery module cooling system employing nanofluid and nano encapsulated phase change materials by means of a lumped electro-thermal model

Torregrosa, A. J.; Broatch, A.; Olmeda, P.; Agizza, Luca (Elsevier, 2023-10-15)

[EN] In this study an analysis of the employment of nanoparticles and nano encapsulated phase change materials for battery cooling is provided. By using a previously validated electro-thermal model of a lithium-ion battery ...
Análisis de los efectos de estrategias de gestión térmica sobre el consumo y emisiones contaminantes en un motor Diesel mediante modelado

Tárraga Prieto, José Ignacio (Universitat Politècnica de València, 2018-11-14)

[ES] El desarrollo de los motores de combustión interna alternativos es un proceso lento y complejo, sobretodo en lo que al diseño y calibración respecta. Con tal de aumentar la velocidad de dicho desarrollo se están ...
Análisis de viabilidad económica y ecológica del cambio de combustible del transporte portuario en el puerto de valencia

Guardia Fornés, Guillermo de la (Universitat Politècnica de València, 2014-10-06)

Este proyecto es una propuesta de la autoridad portuaria de Valencia. Consiste en un estudio de viabilidad sobre el cambio de los motores actuales del transporte portuario para el transporte de contenedores del Puerto ...