Experimental study of influence of internal heat exchanger in a chest freezer using r-513a as replacement of r-134a

Pérez-García, V.; Méndez-Méndez, D.; Belman-Flores, J.M.; Rodríguez-Muñoz, J.L.; Montes-Rodríguez, J. J.; Ramírez-Minguela, J.J.

doi:10.1016/j.applthermaleng.2021.117969

Cited by 8 publications

(4 citation statements)

References 25 publications

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“…En la literatura existen trabajos que se enfocan en identificar la mejor ubicación del IHX dentro de sistemas de refrigeración por eyecto-compresión. Por ejemplo, Pérez-García et al [14] estudiaron experimentalmente la influencia del IHX sobre el comportamiento energético en una nevera. Para su estudio, emplearon el refrigerante R513A como alternativa al R134a.…”

Section: Estado Del Arteunclassified

“…El principio de operación del ciclo es el siguiente: refrigerante entra al intercambiador de calor (IHX-1) como líquido saturado (3) y transfiere energía al fluido proveniente del separador de líquido que se encuentra como vapor saturado (14), lo cual provoca una reducción de su temperatura e ingrese al segundo intercambiador de calor (IHX-2) como líquido subenfriado (4), mientras que al compresor entra el refrigerante como vapor sobrecalentado (1). En el compresor, el refrigerante es comprimido, incrementándose su presión y temperatura (2), y enviado hacia el condensador.…”

Section: Metodologíaunclassified

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Energy and exergy analysis of an ejector-compression refrigeration cycle with double IHX

Rodríguez Muñoz,

Pacheco Cedeño,

Valencia Castillo

et al. 2023

Rev. Ci. Tec.

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This paper shows an energy and exergy analysis of an ejector-compression refrigeration cycle, in which two heat exchangers are included to the system: 1) between the condenser and liquid separator (IHX-1) and 2) between the condenser and the evaporator (IHX-2), which is an alternative configuration proposed and this configuration is defined as ERC+IHX-1+IHX-2. The effect of evaporation temperature and the heat exchanger effectiveness on the energy and exergy efficiencies and the irreversibilities of each component of the cycle have been analyzed for refrigeration and air conditioning applications. The results show that for the alternative configuration and an effectiveness of IHX-1=80%, it results slightly with a higher COP than when the configurations work with an effectiveness of IHX-2=80%. However, the exergy efficiency increases when the evaporation temperature decreases. The components that show the highest contribution to the irreversibilities in the ERC+IHX-1+IHX-2 configuration are: the condenser, the compressor and the evaporator; whereas that the lowest contribution is due to the expansion valve and IHX-1. In addition, the alternative configuration proposed presents a higher exergetic efficiency and lower irreversibilities than the configurations ERC+IHX-1 y ERC+IHX-2 reported in the literature.

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Section: Estado Del Arteunclassified

Section: Metodologíaunclassified

Energy and exergy analysis of an ejector-compression refrigeration cycle with double IHX

Rodríguez Muñoz,

Pacheco Cedeño,

Valencia Castillo

et al. 2023

Rev. Ci. Tec.

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“…The simulated results showed that R-515A has a lower condensation rate than those of R-450A and R-513A. García et al [84] investigated the influence of the internal heat exchanger (IHX) on the thermal behavior of a chest freezer in a vapor compression refrigeration cycle for R-513A and R-134a. Their results indicate that for the same operating conditions, 6.25% less refrigerant mass is required for R-513A compared to R-134a.…”

Section: Condensation Htcs and Pressure Drop Characteristics Inside P...mentioning

confidence: 99%

A Comprehensive Review Regarding Condensation of Low-GWP Refrigerants for Some Major Alternatives of R-134a

et al. 2022

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In this review, the condensation HTCs (heat transfer coefficients) and pressure drop characteristics of some major low-global-warming-potential (GWP) refrigerants alternative to R-134a such as R-1234ze(E), R-1234ze(Z), R-1234yf, R-513A, and R-450A are reviewed. The thermofluids’ characteristics inside/outside a tube, minichannel, microfin tube, and plate heat exchanger are examined. In addition, several other refrigerants attributed to low GWP are also included in the present review. The experimental/numerical/simulation results’ analysis reveals that condensation HTCs and pressure drop characteristics depend on several parameters such as thermodynamics and transport properties of the working fluid, mass flux of the refrigerants, heat flux, saturation temperature, vapor quality, flow patterns, flow conditions, orientation of the condensing geometry, and condensation geometry (shape, size, and smooth/enhanced).

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“…Pérez-García et al [23] experimentally studied the influence of IHX on the thermal behavior of a freezer. R-513A was used as a substitute refrigerant for R-134a.…”

Section: Introductionmentioning

confidence: 99%

Experimental Testing of a Water-to-Water Heat Pump with and without IHX by Using Refrigerants R1234yf and R1234ze(E)

2023

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The use of heat pumps is increasing worldwide, and knowledge of their properties is becoming more and more important. Although numerous tests regarding heat pumps have been performed, due to the large number of influencing variables, the entire range of input parameters is not covered, and there is no overall picture regarding the range of the coefficient of performance (COP) of heat pumps and their output parameters. This study extends existing research and provides a much more detailed comparison of results for the application of R1234yf and R1234ze(E) refrigerants, including the pressure drop across the evaporator, condenser, and internal heat exchanger (IHX). The appropriate mathematical model for the selected components was defined and verified experimentally. A total of 60 series of measurements were performed at different evaporating and condensing temperatures. The deviation of the numerical simulation results from the experimentally determined results was up to 7.4% for cooling capacity, 8.1% for heating capacity, 7.2% for COP and 6.8% for compressor energy consumption. This study shows that COP increases from 4.77% to 10.73% for R1234ze(E) compared to R1234yf. The use of an IHX in the thermal cycle further increases COP for both refrigerants between 2.61% and 4.99%.

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Experimental study of influence of internal heat exchanger in a chest freezer using r-513a as replacement of r-134a

Cited by 8 publications

References 25 publications

Energy and exergy analysis of an ejector-compression refrigeration cycle with double IHX

Energy and exergy analysis of an ejector-compression refrigeration cycle with double IHX

A Comprehensive Review Regarding Condensation of Low-GWP Refrigerants for Some Major Alternatives of R-134a

Experimental Testing of a Water-to-Water Heat Pump with and without IHX by Using Refrigerants R1234yf and R1234ze(E)

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