Ara es mostren els items 1-20 de 27

  • A finite volume method to solve the frost growth using dynamic meshes 

    Bartrons Casademont, Eduard; Oliet Casasayas, Carles; Gutiérrez Álvarez, Enrique; Naseri, Alireza; Pérez Segarra, Carlos David (2018-09-01)
    Article
    Accés restringit per política de l'editorial
    The physical mechanisms of frost formation have been widely studied, yet much empirism is still needed in numerical approaches. Indeed, accurate simulations of frost growth can be reached by setting up a specific combination ...
  • Analysis and design of a drain water heat recovery storage unit based on PCM plates 

    Morales-Ruiz, S; Rigola Serrano, Joaquim; Oliet Casasayas, Carles; Oliva Llena, Asensio (2016-10-01)
    Article
    Accés obert
    This paper is focused on the detailed analysis of a PCM plate heat storage unit with a particular configuration, looking for the maximum contact area with the fluid (water) and the minimum volume to be used in a real ...
  • Analysis of fin-and-tube evaporators in no-frost domestic refrigerators 

    Oliet Casasayas, Carles; Pérez Segarra, Carlos David; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2010)
    Comunicació de congrés
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    This paper summarizes the research work carried out by the authors on domestic refrigerator no-frost evaporators. It includes an explanation of the experimental unit that is currently being constructed to test isobutane ...
  • Analysis of the dynamic behavior of refrigerated spaces using air curtains 

    Jaramillo Ibarra, Julian Ernesto; Pérez Segarra, Carlos David; Oliva Llena, Asensio; Oliet Casasayas, Carles (2009-01-01)
    Article
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    This article is devoted to the study of air curtains applied to reduce the refrigerated chambers heat gains. The proposed strategy is based on the numerical simulation of air curtains by means of computational fluid dynamics ...
  • Analysis of vapour-compression refrigerating systems 

    Sadurní Caballol, Alexandre; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (2011)
    Comunicació de congrés
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    The aim of this paper is to show the authors proposal for steady state numerical simulation of Vapour-Compression Refrigerating Systems (dry expansion, liquid overfeed systems, ...). The developed tool allows using different ...
  • An immersed boundary method to conjugate heat transfer problems in complex geometries. Application to an automotive antenna 

    Favre, F.; Antepara Zambrano, Óscar; Oliet Casasayas, Carles; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (2019-02-05)
    Article
    Accés restringit per política de l'editorial
    Considering that the most common reason for electronic component failure is the excessive temperature level, an efficient thermal management design can prolong the operating life of the equipment, while also increasing its ...
  • A simple optimization approach for the insulation thickness distribution in household refrigerators 

    Trias Miquel, Francesc Xavier; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (Elsevier, 2018-09)
    Article
    Accés restringit per política de l'editorial
    Determination of the optimal insulation thickness is of great relevance in many thermal engineering applications. In this paper, a simple optimization strategy based on the Lagrange multipliers is presented. The optimal ...
  • Comparison of the performance of falling film and bubble absorbers for air-cooled absorption systems 

    Castro González, Jesús; Oliet Casasayas, Carles; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio (2009-07-01)
    Article
    Accés obert
    Small capacity, air-cooled NH3–H2O absorption systems are becoming more attractive in applications where the input energy can be obtained for free (e.g., solar energy, exhaust gases of engines, etc.), due to the increasing ...
  • Detailed analysis of fin-and-tube evaporators 

    Oliet Casasayas, Carles; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2009-09-17)
    Comunicació de congrés
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    This paper is devoted to the presentation of a new model for fin-and-tube evaporators, focusing on the solid core simulation and its integration with a quasi-homogeneous two-phase flow model for the in-tube refrigerant ...
  • Drain water heat recovery storage-type unit for residential housing 

    Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2016-06-25)
    Article
    Accés obert
    The drain water heat recovery (DWHR) system is an interesting household technology to reduce energy costs and environmental impact. The objective of the utilisation of these devices is the recovery of the waste heat from ...
  • Dynamic numerical simulation of a mechanical vapour compression (MVC) desalination system that use renewable source energy 

    Morales Ruíz, Sergio; Rigola Serrano, Joaquim; Castro González, Jesús; Oliet Casasayas, Carles; Oliva Llena, Asensio (International Solar Energy Society, 2017)
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    This paper presents a numerical model to analyse the thermal and fluid dynamic behaviour of a mechanical vapour compression MVC desalination system, which uses renewable energy to supply the electricity required by the ...
  • Dynamic Performance of a Mechanical Vapor Compression (MVC) Desalination System 

    Morales Ruíz, Sergio; Castro González, Jesús; Rigola Serrano, Joaquim; Oliet Casasayas, Carles; Oliva Llena, Asensio (Purdue University, 2018)
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  • Experimental analysis of no-frost domestic refrigerator evaporators 

    Oliet Casasayas, Carles; Pérez Segarra, Carlos David; Oliva Llena, Asensio; Rigola Serrano, Joaquim (2011)
    Comunicació de congrés
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    The air-to-refrigerant evaporator placed in no-frost refrigerators is a critical component because of its simultaneous treatment of both cooler and freezer air streams, which implies a strong drying process on the cooler ...
  • Experimental and numerical study of the dynamic behavior of an air to water heat pump 

    Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Aizpurua Udabe, Imanol; Oliet Casasayas, Carles; Rigola Serrano, Joaquim (Phetradico Communication and Publishing, 2017)
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    This work is focused on studying the dynamic behavior of an air to water heat pump both experimentally and numerically. The system consists of a conventional heat pump cycle (compressor, condenser, capillary tube and ...
  • Flow and heat transfer in a wall-bounded pin matrix 

    Paniagua Sánchez, Leslye; Oliet Casasayas, Carles; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (Begell House, 2012)
    Text en actes de congrés
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  • Frost formation: optimizing solutions under a finite volume approach 

    Bartrons Casademont, Eduard; Pérez Segarra, Carlos David; Oliet Casasayas, Carles (Institute of Physics (IOP), 2016)
    Text en actes de congrés
    Accés obert
    A three-dimensional transient formulation of the frost formation process is developed by means of a finite volume approach. Emphasis is put on the frost surface boundary condition as well as the wide range of empirical ...
  • Heat and moisture insulation by means of air curtains: application to refrigerated chambers 

    Giráldez García, Héctor; Pérez Segarra, Carlos David; Oliet Casasayas, Carles; Oliva Llena, Asensio (Elsevier, 2016-08)
    Article
    Accés obert
    The present study is devoted to the determination of the efficiency of air curtain units (ACUs) applied to heat and moisture insulation of refrigerated chambers. A detailed study of the fluid dynamics and heat and mass ...
  • Modular simulation of vapour compression systems with an object oriented tool 

    Ablanque Mejía, Nicolás; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (2013)
    Text en actes de congrés
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    The objective of this work is to simulate vapour compression refrigeration systems through a modular approach by means of an object - oriented numerical tool called NEST. For this purpose, the global system is modeled as ...
  • Numerical analysis of no-frost domestic refrigerator evaporators 

    Oliet Casasayas, Carles; Pérez Segarra, Carlos David; Oliva Llena, Asensio; Rigola Serrano, Joaquim (2011)
    Comunicació de congrés
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    The air-to-refrigerant evaporator placed in no-frost refrigerators is a critical component because of its simultaneous treatment of both cooler and freezer air streams, which implies a strong drying process on the cooler ...
  • Numerical and experimental analysis of air to water heat pumps 

    Oliet Casasayas, Carles; Sadurní Caballol, Alexandre; Ablanque Mejía, Nicolás; Rigola Serrano, Joaquim (International Energy Agency, 2014)
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    In the present work a numerical and experimental analysis of a R134a air to water heat pump is carried out. A numerical model has been developed and implemented to predict the heat pump thermal and fluid-dynamic behavior. ...