Search Results - "Sieres, Jaime"
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Thermodynamic and heat transfer analyses for R1234yf and R1234ze(E) as drop-in replacements for R134a in a small power refrigerating system
Published in Applied thermal engineering (05-04-2015)“…In this paper we present two different analyses of R1234yf and R1234ze(E) as drop-in replacements for R134a in a small power refrigeration system. The first…”
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Seasonal Efficiency of a Brine-to-Water Heat Pump with Different Control Options according to Ecodesign Standards
Published in Clean technologies (01-06-2022)“…The seasonal performance of a heat pump indicates its average performance during the heating and/or cooling season, taking into account the different energy…”
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Modeling of simultaneous heat and mass transfer processes in ammonia-water absorption systems from general correlations
Published in Heat and mass transfer (01-11-2007)Get full text
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4
Drop-in performance of the low-GWP alternative refrigerants R452B and R454B in an R410A liquid-to-water heat pump
Published in Applied thermal engineering (05-01-2021)“…•R452B and R454B drop-in tests are performed in an R410A liquid-to-water heat pump.•The heat pump uses a variable speed compressor and an electronic expansion…”
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Experimental analysis of R1234yf as a drop-in replacement for R134a in a small power refrigerating system
Published in International journal of refrigeration (01-07-2018)“…•R1234yf as a drop-in replacement for R134a is evaluated•Experimental results for different compressor supply frequency values are obtained•Cooling powers for…”
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Influence of the refrigerant charge in an R407C liquid-to-water heat pump for space heating and domestic hot water production
Published in International journal of refrigeration (01-02-2020)“…•The refrigerant charge effect in an R407C liquid-to-water heat pump is evaluated.•Experimental results for space heating with domestic hot water production…”
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7
Semi-analytical solution of unsteady heat conduction in plain walls with equal surface temperatures: The Transversal Method Of Lines (TMOL) delimited to the “small time” sub-domain
Published in International communications in heat and mass transfer (01-07-2020)“…The present paper addresses uni-directional, unsteady, heat conduction in a plane wall with uniform initial temperature and equal temperature prescribed at the…”
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Plain correlation asymptotes to predict the center and mean temperatures and total heat transfer in simple solid objects with uniform surface temperature at limiting small-time conditions
Published in International journal of heat and mass transfer (01-03-2019)“…•Unsteady one-dimensional heat conduction.•Simple solid objects: plate, cylinder and sphere.•Prescribed uniform temperature boundary condition.•Exact,…”
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Research on the effect of the refrigerant charge in a variable capacity heat pump
Published in HVAC&R research (02-07-2024)“…Current energy efficiency regulations have led to the development of heat pumps equipped with variable speed compressors (VSC) and electronic expansion valves…”
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10
Analysis of the impact of different operating conditions on the performance of a reversible heat pump with domestic hot water production
Published in International journal of refrigeration (01-02-2018)“…•A validated mathematical model for a liquid-to-water heat pump is presented.•The model considers actual dimensions and heat transfer features of all…”
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A general review of the Wilson plot method and its modifications to determine convection coefficients in heat exchange devices
Published in Applied thermal engineering (01-12-2007)“…Heat exchange devices are essential components in complex engineering systems related to energy generation and energy transformation in industrial scenarios…”
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Performance analysis of a R407C liquid-to-water heat pump: Effect of a liquid–vapor heat exchanger and domestic hot water production
Published in International journal of refrigeration (01-05-2019)“…•An experimental analysis of a liquid-to-water heat pump with R407C is presented.•Experimental results for space heating with domestic hot water production…”
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13
Theoretical analysis of a CO2-NH3 cascade refrigeration system for cooling applications at low temperatures
Published in Applied thermal engineering (01-06-2009)“…As a result of environmental problems related to global warming and depletion of the ozone layer caused by the use of synthetic refrigerants (CFC's, HCFC's and…”
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14
The importance of the ammonia purification process in ammonia–water absorption systems
Published in Energy conversion and management (01-08-2006)“…Practical experience in working with ammonia–water absorption systems shows that the ammonia purification process is a crucial issue in order to obtain an…”
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15
Condensation of superheated R134a and R437A inside a vertical tube
Published in Science & technology for the built environment (18-08-2017)“…An experimental study is performed to investigate condensation of superheated R134a and R437A inside a vertical tube. Experimental tests have been performed at…”
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Experimental analysis of a domestic electric hot water storage tank. Part II: dynamic mode of operation
Published in Applied thermal engineering (2007)“…In this paper, the experimental analysis of a full-scale Domestic Electric Hot Water Storage Tank (DEHWST) with a capacity of 150 l is reported. The tank is…”
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17
Experimental analysis of a domestic electric hot water storage tank. Part I: Static mode of operation
Published in Applied thermal engineering (2007)“…In this paper, the experimental analysis of the static mode of operation of a full-scale Domestic Electric Hot Water Storage Tank (DEHWST) with a capacity of…”
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18
Compression–absorption cascade refrigeration system
Published in Applied thermal engineering (01-04-2006)“…This paper describes the study carried out to analyse a refrigeration system in cascade with a compression system at the low temperature stage and an…”
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A hybrid formulation for fast explicit calculation of thermodynamic properties of refrigerants
Published in International journal of refrigeration (01-06-2012)“…When simulating refrigeration systems or equipment, knowledge of refrigerant thermodynamic properties is required. Even though the traditional equations of…”
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Effect of surface radiation on buoyant convection in vertical triangular cavities with variable aperture angles
Published in International journal of heat and mass transfer (01-12-2007)“…The present investigation deals with the numerical computation of laminar natural convection with and without surface-to-surface radiation in a class of…”
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