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Listar por autor "Gonzálvez Maciá, José María"

Mostrando ítems 1-20 de 82

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A comparative study between a two-dimensional numerical minichannel evaporator model and a classical effectiveness-NTU approach under different dehumidifying conditions

Hassan, Abdelrahman Hussein Abdelhalim; Martínez Ballester, Santiago; Gonzálvez Maciá, José (Taylor & Francis, 2015-07-04)

In this article, a two-dimensional numerical model for a minichannel evaporator is implemented. This model takes into account the variation of wall temperature and moist air properties in both longitudinal and transverse ...
A comprehensive study of two-stage vapor compression cycles with vapor-injection for heating applications, taking into account heat sink of finite capacity

Tello Oquendo, Fernando M.; Navarro-Peris, Emilio; Gonzálvez-Maciá, José (Elsevier, 2018-09)

[EN] This paper presents a comprehensive study of two-stage vapor compression cycles with vapor-injection for several refrigerants considering that the heat sink has a limited capacity. The key parameters of the cycle ...
A new moving boundary model for evaluating the performance of wet fins: Application to minichannel evaporators

Hassan, Abdelrahman-Hussein; Martinez-Ballester, Santiago; Gonzálvez-Maciá, José (Elsevier, 2017)

[EN] In this paper, firstly, an innovative numerical model (Fin1D-MB) for wet fins of a minichannel evaporator was developed and verified. The proposed model is based on fin theory in conjunction with the moving boundary ...
A simplified model for shell-and-tubes heat exchangers. Practical application

Vera-Garcia, Francisco; Garcia-Cascales, J. R.; Gonzálvez-Maciá, José; Cabello, R.; Llopis, R.; Sanchez, D.; Torrella Alcaraz, Enrique (Elsevier, 2010)

[EN] In this paper, a simplified model for the study of shell-and-tubes heat exchangers (HXs) is proposed. The model aims to agree with the HXs when they are working as condensers or evaporators. Despite its simplicity, ...
Analysis and optimization of different two-stage transcritical carbon dioxide cycles for heating applications

Pitarch Mocholí, Miguel; Navarro-Peris, Emilio; Gonzálvez Maciá, José; Corberán Salvador, José Miguel (Elsevier, 2016-10)

[EN] Increased interest in the environmental impact of refrigeration technology is leading toward design solutions aimed at improving the energy efficiency and use of eco-friendly refrigerants with low GWP. The aim of this ...
Analysis and optimization of subcritical two-stage vapor injection heat pump systems

Redón Climent, Alicia; Navarro Peris, Emilio; Pitarch, M.; Gonzálvez Maciá, José; Corberán Salvador, José Miguel (Elsevier, 2014-07)

Two of the major problems of heat pump systems working in extreme conditions are the loss of efficiency of the system and the high compressor discharge temperatures. One possibility in order to overcome these issues is ...
Analysis of the Condensate Carryover Phenomenon on Fin and Tube Evaporators

Navarro-Peris, Emilio; Corberán Salvador, José Miguel; Gonzálvez Maciá, José; Zamora, Miguel (World Scientific Publishing, 2015)

Possible carryover of the condensate from the surface of the evaporator has always been a problem that in practice has been solved by limiting the air velocity. However, the need for more compact solutions and especially ...
Análisis de soluciones pasivas para la reducción de la demanda energética máxima en el edificio de deportes de la Universitat Politecnica de Valencia

Pinilla Parreño, María Dilia (Universitat Politècnica de València, 2016-09-05)

[ES] En el presente Trabajo Final de Grado (TFG) “Análisis de soluciones pasivas para la reducción de la demanda energética máxima en el edificio de deportes de la Universidad Politécnica de Valencia”, se va a desarrollar ...
Análisis de soluciones pasivas para la reducción de la demanda energética máxima en la casa del alumno de la Universitat Politecnica de Valencia

Morales Hernández, Laura (Universitat Politècnica de València, 2017-01-16)
Caracterización de un compresor de doble etapa scroll con inyección de vapor para aplicaciones de calefacción en climas extremos

Grado Vallet, Héctor de (Universitat Politècnica de València, 2013-05-16)

Consulta en la Biblioteca ETSI Industriales (9054)
Characterization of a vapor injection scroll compressor as a function of low, intermediate and high pressures and temperature conditions

Navarro-Peris, Emilio; Redón Climent, Alicia; Gonzálvez Maciá, José; Martínez Galván, Israel Octavio; Corberán Salvador, José Miguel (Elsevier, 2013-11)

The interest in two stage cycles has increased in the last years and some compressor manufacturers have commercialized compressors adapted to work in these conditions. Nevertheless, the information supplied by them usually ...
Comparative experimental study of an open piston compressor working with R-1234yf, R-134a and R-290

Navarro-Peris, Emilio; Martínez Galván, Israel Octavio; Nohales Herraiz, Jesús Ángel; Gonzálvez Maciá, José (Elsevier, 2013-05)

Among the different alternatives proposed in the automotive field to replace R-134a and R-1234yf is a new generation fluid which has recently gained great importance for MAC (Mobile Air Conditioning) systems. This fluid ...
Comparative study of the performance of a heat pump for heating with R410A and R32 as refrigerant, using the software IMST-ART

Sánchez-Moreno-Giner, Luis; López-Juárez, Emilio; Gonzálvez-Maciá, José (Universidad de Castilla-La Mancha José Antonio Almendros Ibáñez, 2019-06-14)

[EN] According to the European Commission, at this moment, heating and cooling in buildings account for half of the energy consumption, while only a 16% of the energy used in this issue is obtained employing renewable ...
Comparison of different modeling approaches for minichannel evaporators under dehumidification

Hassan, Abdelrahman-Hussein; Martinez-Ballester, Santiago; Gonzálvez-Maciá, José (Springer-Verlag, 2019-10)

[EN] This paper firstly presents a comprehensive minichannel evaporator model (MCHX-1D-MB) based on fin theory coupled with the moving boundary technique along fin height. To validate the presented model, experimental data ...
Comparison of the performance of a vapor-injection scroll compressor and a two-stage scroll compressor working with high pressure ratios

Tello-Oquendo, Fernando M.; Navarro-Peris, Emilio; Gonzálvez-Maciá, José (Elsevier, 2019-09)

[EN] This paper presents a comparative analysis of the performance of a vapor-injection scroll compressor (SCVI) and a two-stage scroll compressor (TSSC) working with high pressure ratios in heat pump applications. ...
Desarrollo de un modelo de secadora de ropa doméstica asistido por ciclo de compresión de vapor y posterior validación

Barceló Ruescas, Francisco (Universitat Politècnica de València, 2019-09-02)

[ES] En la presente tesis se ha desarrollado un modelo dinámico de simulación de secadoras de ropa asistidas por ciclo de compresión de vapor enfocado a asistir en el desarrollo de producto basado en simulación. Este modelo ...
Desarrollo de un modelo para el cálculo del consumo de climatización en vehículos de pasajeros urbanos

Vásconez Núñez, Daniela Carina (Universitat Politècnica de València, 2019-05-20)

[ES] El sistema de climatización es uno de los equipos auxiliares más importantes de un vehículo, el cual mantiene un ambiente térmicamente confortable al controlar la temperatura y la humedad relativa del aire interior, ...
Desarrollo de una bomba de calor doméstica que usa propano como fluido de trabajo

López Juárez, Emilio (Universitat Politècnica de València, 2023-09-10)

[ES] Las regulaciones medioambientales imponen el uso de refrigerantes con cada vez menor Poder de Calentamiento Atmosférico (PCA), y obligan a que la búsqueda de refrigerantes alternativos a los actuales sea una necesidad ...
Design and Analysis of Charge-Reduced Refrigerant Cycles Using R290

Schnabel, Lena; Methler, Timo; Hassan, Abdelrahman; Dankwerth, Clemens; Gonzálvez-Maciá, José (John Wiley & Sons, 2023-03)

[EN] R290 is one of the most promising refrigerants for heat pumps and cooling processes working in a temperature range of -15 to 70°C. The nearly neglectable global warming potential and attractive thermodynamic properties ...
Development and validation in a 2D-GIS environment of a 3D shadow cast vector-based model on arbitrarily orientated and tilted surfaces

Viana-Fons, Joan Dídac; Gonzálvez-Maciá, José; Payá-Herrero, Jorge (Elsevier, 2020-10-01)

[EN] This paper presents a systematic GIS-based methodology to obtain the shadow cast profile of a group of buildings on arbitrarily orientated and tilted surfaces. The model is integrated in the widely-employed 2D-GIS ...