Now showing items 1-20 of 38

    • A communication-less control scheme for a variable air-gap wireless energy transfer system using current source resonant converter 

      Ghahderijani, Mohammad Moradi; Castilla Fernández, Miguel; Rey López, Juan Manuel; Torres Martínez, Javier; Garnica López, Miguel Andrés (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      This paper presents a robust control method for wireless energy transfer systems using current source resonant converter without any communication network. The proposed control strategy is valid even for systems with ...
    • A systematic review of machine learning techniques related to local energy communities 

      Hernández Matheus, Alejandro Henrique; Löschenbrand, Markus; Berg, Kjersti; Fuchs, Ida; Aragüés Peñalba, Mònica; Bullich Massagué, Eduard; Sumper, Andreas (2022-12)
      Article
      Open Access
      In recent years, digitalisation has rendered machine learning a key tool for improving processes in several sectors, as in the case of electrical power systems. Machine learning algorithms are data-driven models based on ...
    • Anharmonicity in multifrequency atomic force microscopy 

      Santos Hernández, Sergio; Barcons Xixons, Víctor (2014-07)
      Research report
      Open Access
      In multifrequency atomic force microscopy higher eigenmodes are externally excited to enhance resolution and contrast while simultaneously increasing the number of experimental observables with the use of gentle forces. ...
    • Control method for wireless inductive energy transfer systems with relatively large air gap 

      Van Der Pijl, Frank F. A; Bauer, Pavol T.; Castilla Fernández, Miguel (IEEE Press. Institute of Electrical and Electronics Engineers, 2013)
      Article
      Restricted access - publisher's policy
      Recent improvements in semiconductor technology make efficient switching possible at higher frequencies, which benefits the application of wireless inductive energy transfer. However, a higher frequency does not alter ...
    • Cubiertas verdes y rehabilitación: procesos de participación y cooperación universidad empresa 

      Bosch González, Montserrat; Rodríguez Cantalapiedra, Inma; Lacasta Palacio, Ana María; Calvo, Lidia; Boleda Torrent, Martí (2018)
      Conference report
      Open Access
      Las cubiertas vegetales pueden aportar interesantes beneficios a la edificación existente: mejoras en el comportamiento térmico; propiedades acústicas; regulación de las aguas pluviales; y en clave ciudad, mejorar los ...
    • Development of a power flow model for the transmission network of the iberian peninsula 

      Alonso Pérez, Javier (Universitat Politècnica de Catalunya / Technishe Universität Berlin, 2015)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   Technische Universität Berlin
      Over the last years, due to the increasing use of renewable energy, the typical way of producing and transporting electricity in Iberian Peninsula has changed. The way to produce energy has evolved from thermal and hydraulic ...
    • Dynamic simulations of an absorption system with different working pairs at chiller and heat pump application 

      Zheng, Jian; Castro González, Jesús; Oliet Casasayas, Carles (Purdue University, 2021)
      Conference report
      Restricted access - publisher's policy
      This work describes the dynamic simulation of a direct air-cooled single effect solar-driven absorption system and demonstrates the numerical results of the absorption system with different working pairs. The working pairs ...
    • Energy driven transmission schemes for coexistence between HTC and MTC 

      Liesegang Maria, Sergi; Pascual Iserte, Antonio; Muñoz Medina, Olga (VDE Verlag, 2021)
      Conference report
      Open Access
      Coexistence between human-type and machine-type communications is essential in future cellular networks. The former demands high data rates whereas long battery lifetimes are crucial for the latter. In this paper, we ...
    • Energy-consistent discretization of viscous dissipation with application to natural convection flows 

      Sanderse, Benjamin; Trias Miquel, Francesc Xavier (European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
      Conference report
      Open Access
      An energy-consistent formulation of incompressible natural convection flows is proposed. In particular, a discretization of the viscous dissipation term is derived which is consistent with the local kinetic energy equation ...
    • Estació de càrrega de drons 

      Shojaei Sola, David (Universitat Politècnica de Catalunya, 2020-06)
      Bachelor thesis
      Open Access
      El projecte consisteix en el disseny i simulació d’un ondulador, que genera un senyal amb freqüència suficient per a fer entrar en ressonància un tanc ressonantemissorcol·locat a laseva sortida.Gràcies a la part inductiva ...
    • Estudi d’un sistema de càrrega dinàmica sense fils 

      Chordà Herrera, Marc (Universitat Politècnica de Catalunya, 2021-01-13)
      Bachelor thesis
      Restricted access - author's decision
      Aquest treball s’enfoca en el món dels vehicles elèctrics i els sistemes de càrrega sense fils, per les grans avantatges que presenten i el gran mercat que s’espera que tinguin en els propers anys. És un estudi que tracta ...
    • Fertigstellung und Inbetriebnahme eines Versuchstands zur Vermessung experimenteller induktiver Batterieladesysteme 

      Vidal, Humbert (Universitat Politècnica de Catalunya, 2015)
      Master thesis
      Open Access
      Covenantee:   Karlsruher Institut für Technologie
      Within the framework of inductive technology, this master’s thesis represents the conclusion of several previous projects that pursuit a common objective, to design and develop an inductive wireless power transfer system ...
    • Fluid dynamics and heat transfer in the wake of a sphere 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Soria Guerrero, Manel; Gómez, Samuel; Domínguez Pumar, Manuel; Kowalski, Lukasz (2019-04)
      Article
      Open Access
      Direct numerical simulation and large-eddy simulation have been performed for a heated sphere at Reynolds numbers of $Re=1000$ and $Re=10^4$, respectively. The Prandtl number for both simulations has been $Pr=0.7$. ...
    • Grid Flexibility as pivotal instrument in the Energy Transition 

      Aragones Martinez, Victor (Universitat Politècnica de Catalunya, 2020-07-09)
      Master thesis
      Restricted access - author's decision
      Since industrial revolution started in 1750, the world GHG emissions have skyrocketed, reaching values which are dangerous for human health, as well as for the planet itself. An important share of this emissions is coming ...
    • Heat and Mass Transfer Technological Center 

      Oliva Llena, Asensio (Campus de Terrassa de la UPC, 2013-06-13)
      Conference report
      Open Access
    • High energy vibrational excitations of nitromethane in liquid water 

      Jurado Romero, Arnau; Calero, Carles; Sibert III, Edwin L.; Rey Oriol, Rosendo (2023-05-15)
      Article
      Open Access
      The pathways and timescales of vibrational energy flow in nitromethane are investigated in both gas and condensed phases using classical molecular mechanics, with a particular focus on relaxation in liquid water. We monitor ...
    • Impact of mobile transmitter sources on radio frequency energy harvesting 

      Hernández Coarasa, Antonio (Universitat Politècnica de Catalunya, 2012-09-05)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   Northeastern University
      [ANGLÈS] Wireless energy harvesting sensors networks constitute a new paradigm, where the motes deployed in the field are no longer constrained by the limited battery resource, but are able to recharge themselves through ...
    • Low order modeling of thermoacoustic instabilities 

      Fargas Cañas, Marina (Universitat Politècnica de Catalunya, 2022-01-26)
      Master thesis
      Restricted access - author's decision
      Pollution 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 

      Domínguez Pumar, Manuel; Pons Nin, Joan; Chávez Domínguez, Juan Antonio (Springer, 2016-11-11)
      Part of book or chapter of book
      Open Access
      The 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 

      Erol, Selçuk; François, Bertrand (Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica, 2015-06-02)
      Conference report
      Open Access