Tello-Oquendo, Fernando M.; Navarro-Peris, Emilio; Gonzálvez-Maciá, José(Elsevier, 2017)
[EN] This paper presents a characterization methodology for vapor-injection scroll compressors (SCVI). An SCVI was characterized in a modified calorimetric test bench, which is able to control the intermediate pressure and ...
Martínez Ballester, Santiago(Universitat Politècnica de València, 2012-10-10)
La presente tesis se ha llevado a cabo en el Instituto de Ingeniería Energética de la Universitat Politècnica de València y durante una estancia en el National Institute of Standards and Technology (NIST). El objetivo ...
Martínez-Ballester, Santiago; Corberán, José M.; Gonzálvez-Maciá, José(Elsevier, 2013)
[EN] The present work presents a model (Fin1Dx3) for air-to-refrigerant microchannel condensers and gas coolers, with any refrigerant circuitry. The model applies a segment-by-segment discretization to the heat exchanger, ...
Martínez-Ballester, Santiago; Corberán, José M.; Gonzálvez-Maciá, José(Elsevier, 2013)
[EN] For a microchannel heat exchanger (MCHX), given the working conditions, main geometric data of the fin and tubes, heat transfer and face areas, there are multiple choices for the refrigerant circuitry and aspect ratio. ...
Navarro-Peris, Emilio; Corberán Salvador, José Miguel; Martínez Galván, Israel Octavio; Gonzálvez Maciá, José(Elsevier, 2012-03)
The oil temperature in the compressor sump is an important parameter describing the performance of a refrigeration compressor. Its estimation is necessary for evaluation of the lubricant-refrigerant mixture composition and ...
Martínez Galván, Israel; Gonzálvez-Maciá, José; Corberán, José M.; Royo, Rafael(Elsevier, 2011)
[EN] The paper presents the experimental results of a charge optimization study of a water-to-water chiller with two different oils: Mineral and POE. The employed chiller is a prototype which works with propane as refrigerant ...
Tello Oquendo, Fernando Mauricio; Navarro-Peris, Emilio; Gonzálvez Maciá, José; Corberán Salvador, José Miguel(Elsevier, 2016-03)
The current paper presents a comparative study between a scroll compressor with vapor-injection (SCVI) and a two-stage reciprocating compressor (TSRC) operating under extreme conditions. The present work is divided into ...
[EN]
This paper presents experimental results from a brine-to-water heat pump used for space heating at low tem-perature, with a low refrigerant charge of R290 (propane). Performance and refrigerant distribution were ...
Sánchez-Moreno Giner, Luis(Universitat Politècnica de València, 2023-09-06)
[ES] Debido a la crisis climática, es necesario encontrar fuentes alternativas para la climatización de locales y la producción de agua caliente sanitaria (ACS). Las bombas de calor se presentan como una alternativa excelente ...
[EN] This paper presents a semi-empirical model of scroll compressors and proposes a methodology in order to extend this model to vapor-injection scroll compressors. The model takes into account the ideal evolution of the ...
Corberán, José M.; Fernández de Córdoba, Pedro; Gonzálvez-Maciá, José; Alias, F.(Taylor & Francis, 2001)
[EN] An in-depth analysis has been carried out on the discretization of a heat exchange, the discretization of the governing equations, and the solution strategy for the resulting system of equations. An iterative global ...
Parra Gimeno, Sandra(Universitat Politècnica de València, 2023-10-24)
[ES] Ante la urgencia de resolver el problema del cambio climático, los refrigerantes con alto potencial de calentamiento global (PCG) están siendo eliminados paulatinamente, con la intención de sustituirlos por nuevos ...
Tello Oquendo, Fernando Mauricio(Universitat Politècnica de València, 2021-04-05)
[ES] Esta tesis doctoral presenta un estudio de compresores scroll con inyección de vapor (SCVI) para bombas de calor que operan en climas fríos o para aplicaciones de calentamiento de agua a alta temperatura. Para ello, ...
Tello-Oquendo, Fernando M.; Navarro-Peris, Emilio; Gonzálvez-Maciá, José(Universidad de Castilla-La Mancha
José Antonio Almendros Ibáñez, 2019-06-14)
[EN] Vapor-injection technique comprises the injection of vapor refrigerant into an intermediate stage
of compression. This technique is used in refrigeration systems and heat pumps working in
extreme conditions. The ...
[EN] The current paper studies the most suitable ultra-low-global warming potential (GWP) (GWP < 30) candidates in the market, considering also its grade of flammability and toxicity, for heat pumps employed for different ...
This paper presents a comparative study between the air-side heat transfer results of a two-dimensional numerical model for minichannel evaporators (Fin2D-W), and the results of the classical ε¿NTU approach. This study ...