Exploració per tema "Transferència d'energia"
Ara es mostren els items 21-40 de 41
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Inductive contactless energy transfer systems for residential areas
(Universitat Politècnica de Catalunya, 2016-09-09)
Tesi
Accés obertIn recent years, contactless energy transfer systems have been developed and investigated widely. As evident, the transfer energy is performed without physical connection. This technology is classified according to power ... -
Low order modeling of thermoacoustic instabilities
(Universitat Politècnica de Catalunya, 2022-01-26)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autorPollution and The Greenhouse Effect are a concern in our society. The high levels of CO2, NOx, ozone, and methane gasses are alarming and have pushed gas turbine industries to develop more environmentally friendly combustors. ... -
MEMS technologies for energy harvesting
(Springer, 2016-11-11)
Capítol de llibre
Accés obertThe objective of this chapter is to introduce the technology of Microelectromechanical Systems, MEMS, and their application to emerging energy harvesting devices. The chapter begins with a general introduction to the most ... -
On freezing resistance of borehole heat exchangers
(Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica, 2015-06-02)
Text en actes de congrés
Accés obert -
On the use of experimental ensembles in a hybrid deterministic-statistical energy analysis method
(2020)
Text en actes de congrés
Accés restringit per política de l'editorialThere is a clear need in modern industries for models that can predict the vibro-acoustic response of their manufactured products at the design stage. Models based on the hybrid deterministic-statistical method are a ... -
Power reduction coordinated scheme for wind power plants connected with VSC-HVDC
(2017-07-01)
Article
Accés obertThis article introduces a novel power coordination method for the operation under restricted conditions of offshore wind power plants connected with VSC-HVDC without the use of communications between converter stations. ... -
Propuesta de una plataforma basada en blockchain para los intercambios de energía entre prosumidores y diseño mecánico de un mecanismo de seguimiento de máxima potencia
(Universitat Politècnica de Catalunya, 2022-10-20)
Treball Final de Grau
Accés obertEntre els problemes actuals al sector energètic, ens trobem amb la necessitat de regular els dèficits i excedents d'electricitat que es generen quan les llars intenten produir la seva pròpia electricitat. En aquest Treball ... -
Recuperated versus single-recuperator re-compressed supercritical CO2 Brayton power cycles for DEMO fusion reactor based on dual coolant lithium lead blanket
(2017-12-01)
Article
Accés obertThe EUROfusion research program is currently exploring alternative solutions for a future fusion power plant with DEMO (DEMOnstration Power Plant) prototype. One of the most important issues arising from a dual coolant ... -
Self-thermal insulation of containers by the precipitation and formation of a gas film at the walls for thermal energy storage
(2023-02-23)
Article
Accés obertPassive thermal self-insulation of the inside walls of containers when they are deliberately coated by nucleation sites and the fluid is diluted with a certain gas. It is well known -in heat transfer engineering, the drastic ... -
Sensitivity Study To An Absorption System Performance Considering Heat And Mass Transfer Enhancements
(Purdue University, 2022)
Text en actes de congrés
Accés restringit per política de l'editorialThis work describes the absorption system performance with working pairs LiBr-H2O and Carrol-H2O (Carrol contains LiBr and EG -Ethylene glycol- with a mass ratio at 4.5:1) considering the thermal characteristics enhancement. ... -
Solvation dynamics in liquid water: 1: ultrafast energy fluxes
(2015-01-30)
Article
Accés obertSolvation dynamics in liquid water is addressed via nonequilibrium energy-transfer pathways activated after a neutral atomic solute acquires a unit charge, either positive or negative. It is shown that the well-known ... -
Solvation dynamics in liquid water: III: energy fluxes and structural changes
(2017-02-16)
Article
Accés obertIn previous installments it has been shown how a detailed analysis of energy fluxes induced by electronic excitation of a solute can provide a quantitative understanding of the dominant molecular energy flow channels ... -
Solvation dynamics in water: 2. Energy fluxes on excited- and ground-state surfaces
(2016-11-03)
Article
Accés obertThis series’ first installment introduced an approach to solvation dynamics focused on expressing the emission frequency shift (following electronic excitation of, and resulting charge change or redistribution in, a solute) ... -
Study for the computational resolution of conservation equations of mass, momentum and energy. Possible application to different aeronautical and industrial engineering problems: Case 1A.
(Universitat Politècnica de Catalunya, 2017-06-10)
Treball Final de Grau
Accés restringit per decisió de l'autorThis project deals with the numerical simulation of the Navier-Stokes equations for different cases. By computing several benchmark cases, the code is tested and improved in order to compute more difficult cases such as ... -
Study for the computational resolution of conservation equations of mass, momentum and energy. Possible application to different aeronautical and industrial engineering problems: Case 5A.
(Universitat Politècnica de Catalunya, 2017-06-10)
Treball Final de Grau
Accés restringit per decisió de l'autorThe numerical simulation of the RAE2822 aerofoil under transonic flow conditions (including shock-induced separation at the upper surface) has been performed using unsteady Reynolds-averaged numerical simulation (URANS), ... -
Study for the implementation of improvements in the supply chain of a Turkish company
(Universitat Politècnica de Catalunya, 2018-09)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autorIn view of today’s economic conditions chemical processes are operated or designed on the basis of optimum energy consumption. Thus, primarily heat integration studies are undertaken, and the design of the heat exchanger ... -
Tracking energy transfer from excited to accepting modes : application to water bend vibrational relaxation
(2012)
Article
Accés obertWe extend, via a reformulation in terms of Poisson brackets, the method developed previously (Rey et al., J. Phys. Chem. A, 2009, 113, 8949) allowing analysis of the pathways of an excited molecule's ultrafast vibrational ... -
Ultrafast energy transfer from the intramolecular bending vibration to librations in liquid water
(2009-06-18)
Article
Accés restringit per política de l'editorialA theoretical study of the water bend-to-libration energy transfer in liquid H2O has been performed by means of nonequilibrium classical molecular dynamics computer simulations. Attention has been focused on the time ... -
Ultrafast librational relaxation of H2O in liquid water
(2013-04-25)
Article
Accés restringit per política de l'editorialThe ultrafast librational (hindered rotational) relaxation of a rotationally excited H2O molecule in pure liquid water is investigated by means of classical nonequilibrium molecular dynamics simulations and a power and ... -
Uprating of transmission lines by means of HTLS conductors for a sustainable growth: challenges, opportunities, and research needs
(2020-12-01)
Article
Accés obertThis paper provides a comprehensive and critical review and evaluation of the technological state-of-the-art of high-temperature low-sag (HTLS) conductors by analyzing research articles, theses, reports, white papers and ...