Search Results - "Sieres, Jaime"

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  1. 1

    Thermodynamic and heat transfer analyses for R1234yf and R1234ze(E) as drop-in replacements for R134a in a small power refrigerating system by Janković, Zvonimir, Sieres Atienza, Jaime, Martínez Suárez, José Antonio

    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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    Journal Article
  2. 2

    Seasonal Efficiency of a Brine-to-Water Heat Pump with Different Control Options according to Ecodesign Standards by Sieres, Jaime, Ortega, Ignacio, Cerdeira, Fernando, Álvarez, Estrella, Santos, José M.

    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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  3. 3
  4. 4

    Drop-in performance of the low-GWP alternative refrigerants R452B and R454B in an R410A liquid-to-water heat pump by Sieres, Jaime, Ortega, Ignacio, Cerdeira, Fernando, Álvarez, Estrella

    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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  5. 5

    Experimental analysis of R1234yf as a drop-in replacement for R134a in a small power refrigerating system by Sieres, Jaime, Santos, José Manuel

    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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  6. 6

    Influence of the refrigerant charge in an R407C liquid-to-water heat pump for space heating and domestic hot water production by Sieres, Jaime, Ortega, Ignacio, Cerdeira, Fernando, Álvarez, Estrella

    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. 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 by Campo, Antonio, Macia, Yunesky Masip, Sieres, Jaime

    “…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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  8. 8

    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 by Campo, Antonio, Sieres, Jaime, Masip-Macía, Yunesky

    “…•Unsteady one-dimensional heat conduction.•Simple solid objects: plate, cylinder and sphere.•Prescribed uniform temperature boundary condition.•Exact,…”
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  9. 9

    Research on the effect of the refrigerant charge in a variable capacity heat pump by Ortega, Ignacio, Sieres, Jaime, Cerdeira, Fernando, Álvarez, Estrella, Santos, José Manuel

    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. 10

    Analysis of the impact of different operating conditions on the performance of a reversible heat pump with domestic hot water production by Janković, Zvonimir, Sieres, Jaime, Cerdeira, Fernando, Pavković, Branimir

    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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  11. 11

    A general review of the Wilson plot method and its modifications to determine convection coefficients in heat exchange devices by Fernández-Seara, José, Uhía, Francisco J., Sieres, Jaime, Campo, Antonio

    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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  12. 12

    Performance analysis of a R407C liquid-to-water heat pump: Effect of a liquid–vapor heat exchanger and domestic hot water production by Ortega, Ignacio, Sieres, Jaime, Cerdeira, Fernando, Álvarez, Estrella, Rodríguez, Juan

    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. 13

    Theoretical analysis of a CO2-NH3 cascade refrigeration system for cooling applications at low temperatures by DOPAZO, J. Alberto, FERNANDEZ-SEARA, José, SIERES, Jaime, UHIA, Francisco J

    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. 14

    The importance of the ammonia purification process in ammonia–water absorption systems by Fernández-Seara, José, Sieres, Jaime

    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. 15

    Condensation of superheated R134a and R437A inside a vertical tube by Sieres, Jaime, Martín, Elena, Martínez-Suárez, José Antonio

    “…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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  16. 16

    Experimental analysis of a domestic electric hot water storage tank. Part II: dynamic mode of operation by Fernández-Seara, José, Uhı´a, Francisco J., Sieres, Jaime

    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. 17

    Experimental analysis of a domestic electric hot water storage tank. Part I: Static mode of operation by Fernández-Seara, José, Uhía, Francisco J., Sieres, Jaime

    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. 18

    Compression–absorption cascade refrigeration system by Fernández-Seara, José, Sieres, Jaime, Vázquez, Manuel

    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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  19. 19

    A hybrid formulation for fast explicit calculation of thermodynamic properties of refrigerants by Sieres, Jaime, Varas, Fernando, Martínez-Suárez, Jose Antonio

    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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  20. 20

    Effect of surface radiation on buoyant convection in vertical triangular cavities with variable aperture angles by Sieres, Jaime, Campo, Antonio, Ridouane, El Hassan, Fernández-Seara, José

    “…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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