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Listar por palabra clave "Heat transfer"

Mostrando ítems 1-20 de 100

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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 comprehensive methodology to analyse the Global Energy Balance in Reciprocating Internal Combustion Engines

Carreño Arango, Ricardo (Universitat Politècnica de València, 2016-11-02)

[EN] The main objective of this doctoral thesis is the development of a comprehensive methodology to perform and analyse the thermal balance of reciprocating engines, based on experimental and theoretical techniques. ...
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 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 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 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 tabulation method of Li-ion Thermal Runaway mechanisms for the acceleration of high dimensional simulations

García Martínez, Antonio; Micó, Carlos; Marco-Gimeno, Javier; Bernal, Andrés (Elsevier, 2024-11-15)

[EN] High-Fidelity numerical simulations of the Thermal Runaway (TR) phenomenon on lithium-ion batteries (LIB) depict stiff system of equations that need to be solved with extremely low time-steps to ensure numerical ...
Accelerated mild heating of dry-cured ham by applying power ultrasound in a liquid medium

Contreras-Ruiz, Marina; Benedito Fort, José Javier; Bon Corbín, José; Garcia-Perez, J.V. (Elsevier, 2018)

[EN] Mild thermal treatments could be considered a feasible technique with which to improve the texture of dry-cured ham. This study explores the feasibility of using power ultrasound (PuS) to intensify heat transfer during ...
Adaptation of a 1-D tool to study transient thermal in turbocharger bearing housing

Serrano, J.R.; Tiseira, Andrés-Omar; García-Cuevas González, Luis Miguel; Rodriguez-Usaquen, Yuly Tatiana (Elsevier, 2018)

[EN] The heat transfer model can be used in a one-dimensional (1-D) engine simulation. When the engine speed is reduced to zero, the codes have been upgraded to calculate transient turbocharger thermal conditions. The ...
Advanced interface models for metal forming simulations

Schmid, Steven R.; Liu, J.; Sellés Cantó, Miguel Ángel; Pasang, Timotius (Elsevier, 2013-11)

Friction and heat transfer in metal forming simulations are usually restricted by software to be interface constants, a situation not reflected by the mechanics of real manufacturing processes. A better simulation approach ...
An analysis of the transient regime temperature field in wet grinding

González-Santander Martínez, Juan Luis; Isidro San Juan, José María; Martín, G. (Springer-Verlag, 2015)

[EN] In this paper, the Samara-Valencia model for heat transfer in grinding is considered. This model is particularized to the case of wet grinding, assuming a constant heat transfer coefficient on the workpiece surface ...
Analysis of cooling materials, Simulation and Representation of a PE polymer material for cooling energy saving

Montesinos Micó, Leticia (Universitat Politècnica de València, 2023-09-12)

[ES] El proyecto tiene como objetivo estudiar diferentes materiales de refrigeración de edificios para el ahorro de energía. Se realizará una simulación por programación para evaluar el comportamiento de los materiales, y ...
Analysis of the Internal Thermofluid-Dynamics in a Uniflow Scavenged Engine

Darbhamalla, Aditya (Universitat Politècnica de València, 2024-05-31)

[ES] El transporte terrestre es uno de los principales contribuyentes a las emisiones y tiene un impacto en los cambios climáticos y los peligros para la salud. Para abordar estos problemas, la industria automotriz se está ...
Análisis de diversos fenómenos físicos, variables y correlaciones del Flujo de Calor Crítico (CHF) en caudal bifásico y mejora de los modelos de predicción

Zarzuela Pulido, Adrián (Universitat Politècnica de València, 2021-06-16)

[ES] El propósito de este trabajo es analizar los modelos mecanicistas y/o varios parámetros de caudal para mejorar la predicción y testeo con técnicas estadísticas del Flujo de Calor Crítico (CHF). La teoría referente al ...
Análisis de la interacción de los procesos de inyección y combustión con el campo de velocidad dentro del cilindro en motores de encendido por compresión

Pachano Prieto, Leonardo Manuel (Universitat Politècnica de València, 2017-07-27)

Emission legislation together with the need of more fuel-efficient engines have driven the development of promising combustion concepts in compression ignition (CI) engines. Most of them, lead toward a lean and low temperature ...
Aportación a la mejora del fiagnóstico de la combustión y balances de energía para motores de combustión interna alternativos

Carreño Arango, Ricardo (Universitat Politècnica de València, 2014-09-25)

[EN] In the last 20 years, the research in engines has been centered principally in reducing the emissions and fulfills the normative. However, due to the high exigency of the current normative, the use of after treatment ...
Application of a zero-dimensional model to assess the effect of swirl on indicated efficiency

Broatch, A.; Martín, Jaime; García Martínez, Antonio; Blanco-Cavero, Diego; Warey, Alok; Domenech, Vicent (SAGE Publications, 2019-10)

[EN] Increasing internal combustion engine efficiency continues being one of the main goals of engine research. To achieve this objective, different engine strategies are being developed continuously. However, the assessment ...
Application of the finite element method to the understanding of a non-steady state heat transport problem

Tarrazó-Serrano, Daniel; Castiñeira Ibáñez, Sergio; Sánchez-García, E.; Gasque Albalate, Maria; Uris Martínez, Antonio; Rubio Michavila, Constanza (IATED, 2022-07-06)

[EN] Nowadays, the search for new active and constructive learning methodologies is one of the pedagogical objectives in universities and other educational institutions. In the degrees taught at the Escola Tècnica Superior ...
Assessment of the improvement of internal combustion engines cooling system using nanofluids and nanoencapsulated phase change materials

Torregrosa, A. J.; Broatch, A.; Olmeda, P.; Dreif-Bennany, Amin (SAGE Publications, 2021-06)

[EN] In recent years, due to the increasing need to reduce consumption of reciprocating internal combustion engines, new researches on different subsystems have raised. Among them, the use of nanofluids as a coolant medium ...
Boosting the capabilities of gas stand data acquisition and control systems by using a digital twin based on a holistic turbocharger model

Serrano, J.R.; García-Cuevas González, Luis Miguel; Samala, Vishnu; López-Carrillo, Juan Antonio; Mai, Holger (American Society of Mechanical Engineers (ASME), 2021-10-15)

[EN] During the last decade, increasingly advanced turbocharger models have been developed for sizing, engine matching and one-dimensional modeling. This work goes further and, instead of using these models for turbocharged ...