Now showing items 1-20 of 40

    • 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
      Open Access
      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 ...
    • 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
      Open Access
      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 ...
    • 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
      Open Access
      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 ...
    • 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
      Open Access
      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)
      Conference lecture
      Restricted access - publisher's policy
      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
      Restricted access - publisher's policy
      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)
      Conference lecture
      Restricted access - publisher's policy
      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 ...
    • Assessment of numerical aspects using LES in particle separation devices 

      Muela Castro, Jordi; Rigola Serrano, Joaquim; Oliet Casasayas, Carles; Pérez Segarra, Carlos David; Oliva Llena, Asensio (European Conference for AeroSpace Sciences (EUCASS), 2019)
      Conference report
      Open Access
      Numerical simulations can be a powerful tool for the design and optimization of Foreign Object Debris (FOD) protection and separation devices. This work aims to study the relevance and influence of different modelling and ...
    • 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
      Open Access
      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)
      Conference lecture
      Restricted access - publisher's policy
      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 ...
    • Development of Innovative Heat Sinks for Power Electronics Cooling within the More Electrical Aircraft 

      Oliet Casasayas, Carles; Naseri, Alireza; Rigola Serrano, Joaquim; Oliva Llena, Asensio; Mullen, David; McKay, Connor; Hoell, Klaus; Preishuber-Pfluegl, Florian; Migneau, Maxime (European Conference for AeroSpace Sciences (EUCASS), 2019)
      Conference report
      Open Access
    • 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
      Open Access
      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)
      Conference report
      Restricted access - publisher's policy
      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)
      Conference report
      Restricted access - publisher's policy
    • Dynamic simulation of indirect air conditioning systems with optimized computational time 

      Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (2019)
      Conference report
      Open Access
    • Experimental analysis of no-frost domestic refrigerator evaporators 

      Oliet Casasayas, Carles; Pérez Segarra, Carlos David; Oliva Llena, Asensio; Rigola Serrano, Joaquim (2011)
      Conference lecture
      Restricted access - publisher's policy
      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)
      Conference report
      Restricted access - publisher's policy
      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)
      Conference report
      Restricted access - publisher's policy
    • Frost formation: optimizing solutions under a finite volume approach 

      Bartrons Casademont, Eduard; Pérez Segarra, Carlos David; Oliet Casasayas, Carles (Institute of Physics (IOP), 2016)
      Conference report
      Open Access
      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
      Open Access
      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 ...