Listar EMC_Articles por autoría "ce793ccc-1c84-42bf-8709-8581fb60fcdc"
Mostrando ítems 1-20 de 82
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A comparison between the modeling of a reciprocating compressor using artificial neural network and physical model
Belman, Juan; Ledesma, S.; Barroso-Maldonado, Juan Manuel; Navarro-Esbrí, Joaquín Elsevier (2015)This article presents the development, validation, and comparison of two methods for modeling a reciprocating compressor. Initially, the physical mode is based on eight internal sub-processes that incorporate infinitesimal ... -
A new HVAC ductwork steady-state flow analysis method: The Minimum Energy Dissipation Principle applied to flow networks including the effects of branched junctions
Soto Francés, Víctor Manuel; Pinazo Ojer, Jose Manuel; Sarabia Escriva, Emilio José; Navarro-Esbrí, Joaquín Elsevier (2021-09-23)The fact that the popular head loss coefficient concept, may become negative in branched junctions, is a symptom that something is not correctly managed. The paper makes a review of recent works which have sought new models ... -
A practical approach for teaching the organic rankine cycles (ORCs) in an advanced thermodynamics course
Mota-Babiloni, Adrián; Navarro-Esbrí, Joaquín; Molés Ribera, Francisco; Mateu-Royo, Carlos DYNA (2020-03)Higher Education Institutions must consider the most recently developed technologies to increase energy efficiency. A significant share of the heat used in industry is wasted while still being at usable temperature levels ... -
A review of refrigerant R1234ze(E) recent investigations
Mota-Babiloni, Adrián; Navarro-Esbrí, Joaquín; Moles, Fran; Barragán Cervera, Angel; Peris, Bernardo; Verdú, Gumersindo Elsevier (2016-02-25)Climate change is demonstrated through global surface temperatures increase in the last century. To stop this phenomenon, new regulations that ban or tax greenhouse gas fluids (HFC among them) have been approved. In the ... -
Advanced high temperature heat pump configurations using low GWP refrigerants for industrial waste heat recovery: A comprehensive study
Mateu-Royo, Carlos; Arpagaus, Cordin; Mota-Babiloni, Adrián; Navarro-Esbrí, Joaquín; Bertsch Stefan S. Elsevier (2021-01-02)High temperature heat pumps (HTHPs) have a great potential to improve industrial processes with thermal demand through industrial waste heat recovery and revalorization. Vapor compression HTHPs are very sensitive to the ... -
Advanced two-stage cascade configurations for energy-efficient –80 °C refrigeration
Udroiu, Cosmin-Mihai; Mota-Babiloni, Adrián; Navarro-Esbrí, Joaquín Elsevier (2022-06-24)In response to the COVID-19 pandemic, some vaccines have been developed requiring ultralow-temperature refrigeration, and the number of these freezers has been increased worldwide. Ultralow-temperature refrigeration operates ... -
Analysis based on EU Regulation No 517/2014 of new HFC/HFO mixtures as alternatives of high GWP refrigerants in refrigeration and HVAC systems
Mota-Babiloni, Adrián; Navarro-Esbrí, Joaquín; Barragán Cervera, Angel; Moles, Fran; Peris, Bernardo Elsevier (2015)The EU Regulation No 517/2014 is going to phase-out most of the refrigerants commonly used in refrigeration and air conditioning systems (R134a, R404A and R410A) because of their extended use and their high GWP values. ... -
Application of a lumped model for predicting energy performance of a variable-speed vapour compression system
Navarro-Esbrí, Joaquín; Ginestar, D.; Belman, Juan; Milián, V.; Verdú, Gumersindo Elsevier (2010)This work presents a model for a variable-speed vapour compression system that is able to predict accurately the system performance using data easily obtained from an industrial facility. The model uses information on the ... -
Automated modelling of complex refrigeration cycles through topological structure analysis
Belman, Juan; Riesco Avila, J.M.; Gallegos-Muñoz, Armando; Navarro-Esbrí, Joaquín; Aceves, S.M. Elsevier (2009)We have developed a computational method for analysis of refrigeration cycles. The method is well suited for automated analysis of complex refrigeration systems. The refrigerator is specified through a description of flows ... -
Bottoming organic Rankine cycle configurations to increase Internal Combustion Engines power output from cooling water waste heat recovery
Peris, Bernardo; Navarro-Esbrí, Joaquín; Moles, Fran Elsevier (2013-11-03)This work is focused on waste heat recovery of jacket cooling water from Internal Combustion Engines (ICEs). Cooling water heat does not always find use due to its low temperature, typically around 90 °C, and usually is ... -
Characterization and modeling of a scroll expander with air and ammonia as working fluid
Mendoza, Luis Carlos; Navarro-Esbrí, Joaquín; Bruno, Joan Carles; Lemort, Vincent; Coronas, Alberto Elsevier (2014-09)This paper presents the experimental characterization and modeling of a scroll expander. The expander used here is a scroll compressor modified to work as an expander. It is characterized in two experimental setups using ... -
Commercial refrigeration – An overview of current status
Mota-Babiloni, Adrián; Navarro-Esbrí, Joaquín; Barragán Cervera, Angel; Moles, Fran; Peris, Bernardo; Verdú, Gumersindo Elsevier (2015)Commercial refrigeration comprises food freezing and conservation in retail stores and supermarkets, so, it is one of the most relevant energy consumption sectors, and its relevance is increasing. This paper reviews the ... -
Comparative analysis of HFO-1234ze(E) and R-515B as low GWP alternatives to HFC-134a in moderately high temperature heat pumps
Mateu-Royo, Carlos; Mota-Babiloni, Adrián; Navarro-Esbrí, Joaquín; Barragán Cervera, Angel Elsevier (2020-12-17)This article provides a theoretical energy performance and carbon footprint analysis of the hydrofluoroolefin HFO-1234ze(E) and the mixture R-515B as low global warming potential (GWP) refrigerants to replace the ... -
Comparative evaluation of R1234yf, R1234ze(E) and R450A as alternatives to R134a in a variable speed reciprocating compressor
Mendoza-Miranda, Juan Manuel; Mota-Babiloni, Adrián; Ramírez Minguela, J. J.; Muñoz Carpio, V. D.; Carrera Rodríguez, M.; Navarro-Esbrí, Joaquín; Salazar Hernández, C. Elsevier (2016-11-01)A comparative energetic evaluation of R1234yf, R1234ze(E) and R450A as alternatives to R134a in a variable speed compressor is carried out. A compressor model based on dimensionless numbers was obtained using the ... -
Comparative study of transcritical vapor compression configurations using CO2 as refrigeration mode base on simulation
Pérez García, V.; Belman, Juan; Navarro-Esbrí, Joaquín; Rubio Maya, C. Elsevier (2013-03)Despite of the excellent efficiency of the CO2 transcritical cycle in heat pump mode, there is a loss of efficiency in refrigeration mode compared with the subcritical vapor compression cycle with HFC refrigerants. This ... -
Comprehensive experimental evaluation of R1234yf-based low GWP working fluids for refrigeration and heat pumps
Al-Sayyab, Ali; Navarro-Esbrí, Joaquín; Barragán Cervera, Angel; Kim, Sarah; Mota-Babiloni, Adrián Elsevier (2022-03-17)This work presents an experimental comparison for low GWP refrigerants used in vapour compression cooling and heating systems. The study compares three lower global warming potential (GWP) refrigerants (R513A, R516A, and ... -
Computational tool for experimental refrigeration system analysis using spreadsheets
Mendoza-Miranda, Juan Manuel; Belman, Juan; Gallegos-Muñoz, Armando; Mota-Babiloni, Adrián; Navarro-Esbrí, Joaquín Publicaciones DYNA (2014-12)This paper presents a spreadsheet application for data filtering and energy analysis, which has applications in research and experimental evaluation of the energetic performance of alternative refrigerants. Experimental ... -
Conventional and Advanced Exergoeconomic Analysis of a Compound Ejector-Heat Pump for Simultaneous Cooling and Heating
Al-Sayyab, Ali; Navarro-Esbrí, Joaquín; Soto Francés, Víctor Manuel; Mota-Babiloni, Adrián MDPI (2021-06-13)This work focused on a compound PV/T waste heat driven ejector-heat pump system for simultaneous data centre cooling and waste heat recovery for district heating. The system uses PV/T waste heat as the generator’s heat ... -
Design of an environmentally friendly refrigeration laboratory based on cooling capacity calculation for graduate students
Mota-Babiloni, Adrián; Makhnatch, Pavel; Navarro-Esbrí, Joaquín; Moles, Fran; Khodabandeh, Rahmatollah Ahmad Ibrahim (2018)Lower global warming potential (GWP) refrigerants must be used in refrigeration education to integrate the environmentally responsible engineering principles in class. However, most of the refrigeration educational ... -
Development and validation of a micro-fin tubes evaporator model using R134a and R1234yf as working fluids
Mendoza-Miranda, Juan Manuel; Ramírez Minguela, J. J.; Muñoz Carpio, V. D.; Navarro-Esbrí, Joaquín Elsevier (2015)This paper presents a model of shell and tube evaporator with micro-fin tubes using R1234yf and R134a. The model developed for this evaporator uses the ε-NTU method to predict the evaporating pressure, the refrigerant ...