Now showing items 1-20 of 22

    • A 0D approach fot extended operational modeling of air ejectors in thermal systems 

      Schillaci, Eugenio; Oliet Casasayas, Carles; Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Vemula, Jagadish Babu; Duponcheel, Matthieu; Bartosiewicz, Yann; Planquart, Philippe (Begell House, 2023)
      Conference report
      Restricted access - publisher's policy
      Classic ejector models work accurately only in normal operating conditions, i.e. when the primary flow is in supercritical conditions. Moreover, they do not take into account abnormal situations, such as when the primary ...
    • Coupling of thermal and electrical systems for the simulation of ECS architectures 

      Ablanque Mejía, Nicolás; Gurumurthy, Sriram; Torras Ortiz, Santiago; Monti, Antonello; Rigola Serrano, Joaquim; Oliet Casasayas, Carles (Linköping University, 2023)
      Conference report
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      This work is focused on the coupling of two complex models based on different underlying physics: a vapor compression refrigerating system and its electrical drive system. The main challenge was to correctly handle the ...
    • 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 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
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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 ...
    • Heat Exchanger Surrogates for a Vapor Compression System 

      Loka, Nasrulloh Ratu Bagus Satrio; Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Gurumurthy, Sriram; Monti, A.; Rigola Serrano, Joaquim; Oliet Casasayas, Carles; Couckuyt, Ivo; Dhaene, Tom (Linköping University, 2023)
      Conference report
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      Given the computationally intensive nature of heat exchanger simulators, utilizing a data-driven surrogate model for efficiently computing the heat exchanger outputs is desirable. This study focuses on developing integrated ...
    • Heat exchangers modelling and calibration for complete ECS architectures simulations 

      Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim (European Conference for AeroSpace Sciences (EUCASS), 2022)
      Conference lecture
      Open Access
      The aeronautical industry is currently designing new Environmental Control System (ECS) architectures based on the More Electrical Aircraft (MEA) concept in order to improve the energy consumption efficiency inside commercial ...
    • Manual de pràctiques de laboratori de Termodinàmica (v1) 

      Torras Ortiz, Santiago; Ablanque Mejía, Nicolás; Román Concha, Frida Rosario; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Calventus Solé, Yolanda (Universitat Politècnica de Catalunya, 2023)
      Practical exercise
      Open Access
    • 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)
      Conference report
      Restricted access - publisher's policy
      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 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)
      Conference lecture
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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. ...
    • Numerical Model of Capillary Tubes: Enhanced Performance and Study of Non-Adiabatic Effects 

      Ablanque Mejía, Nicolás; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (Purdue University, 2014)
      Conference report
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      In the present work a numerical model to simulate the thermal and fluid-dynamic phenomena inside non-adiabatic capillary tubes is presented. It consists of an improved version of the distributed model detailed in Ablanque ...
    • Numerical simulation and experimental validation of vapor compression refrigerating systems: special emphasis on natural refrigerants 

      Ablanque Mejía, Nicolás (Universitat Politècnica de Catalunya, 2010-07-21)
      Doctoral thesis
      Open Access
      The aim of this work is to study the thermal and fluid-dynamic behavior of vapor compression refrigerating systems and their constitutive elements (heat exchangers, expansion devices, compressors and connecting tubes) ...
    • Numerical simulation of capillary tubes. Application to domestic refrigeration with isobutane 

      Ablanque Mejía, Nicolás; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2010)
      Conference lecture
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      This work presents the implementation and validation of a numerical model that simulates the thermal and fluiddynamic phenomena inside capillary tubes. The algorithm is based on a two-phase flow model where the governing ...
    • Numerical simulation of non-adiabatic capillary tubes. Special emphasis on the near-saturation zone 

      Ablanque Mejía, Nicolás; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Oliva Llena, Asensio (Elsevier, 2015-04-15)
      Article
      Open Access
      The aim of this article is to present a distributed numerical model that simulates the thermal and fluid-dynamic phenomena inside non-adiabatic capillary tubes. The resolution approach is based on a two-phase flow model ...
    • Numerical studies on passive vapor compression cycle regulating elements 

      Ablanque Mejía, Nicolás; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (International Institute of Refrigeration, 2015)
      Conference report
      Restricted access - publisher's policy
      The present work analyses the role of both the capillary tube and the low pressure accumulator on domestic refrigerators. The main goal is to provide a better insight on how the refrigerant flow is regulated by the capillary ...
    • Simulation of Household Refrigerators with a Flexible Numerical Tool 

      Ablanque Mejía, Nicolás; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (Purdue University, 2014)
      Conference report
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      This work presents a flexible numerical platform to simulate a whole household refrigeration unit taking into account both the refrigeration cycle itself and the refrigerated compartments network. The methodology implemented ...
    • Thermal System Oriented Simulation of Aircraft Electrical Environmental Control Systems Including its Electric Coupling 

      Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (European Conference for AeroSpace Sciences (EUCASS), 2019)
      Conference report
      Open Access
      A flexible numerical platform based on libraries has been developed within the Dymola/Modelica framework to simulate Environmental Control Systems (ECS). The goal was to build up a flexible tool to analyse complex systems ...
    • Thermal Systems Oriented Two-Phase Heat Exchanger Models. Focus on Numerical Robustness 

      Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim (Purdue University, 2022)
      Conference lecture
      Open Access
      The simulation of complex refrigeration architectures (that usually include vapor compression cycles) provides useful information for design, study and optimization purposes. Such arrangements may include several interconnected ...
    • Transient response in small capacity vapour compression systems. Experimental data and numerical approach 

      Ablanque Mejía, Nicolás; Rigola Serrano, Joaquim; Oliet Casasayas, Carles; Pérez Segarra, Carlos David (2011)
      Conference lecture
      Restricted access - publisher's policy
      The aim of this work is to introduce a numerical approach to study the transient response of vapour compression refrigerating systems. The emphasis is put on small capacity systems working with R600a (power consumption ...
    • Transient Thermal Management of Vapor Cycles to Simulate Aircraft Electrical Environment Control Systems 

      Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (International Institute of Refrigeration, 2019)
      Conference lecture
      Restricted access - publisher's policy
      A Modelica library has been developed to simulate both transient and steady state of vapor cycle systems (VCS) integrated within Electrical Environment Control Systems (E-ECS) architectures applied in the thermal management ...
    • Vapor Compression System Modelica Library for Aircraft ECS 

      Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (Purdue University, 2018)
      Conference report
      Restricted access - publisher's policy
      This work presents a Modelica library aimed to simulate vapor compression systems at both steady and transient conditions. The simulation of these specific systems is particularly challenging ...