Liquid–gas heat exchanger for household refrigerator

Dagilis, Vytautas; Vaitkus, Liutauras; Balčius, Algimantas

doi:10.1016/j.ijrefrig.2003.10.006

Cited by 7 publications

(3 citation statements)

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“…Dagilis et al [28] applied a steady state mathematical model under various operating conditions, giving an optimal inner IHX diameter for household refrigerating systems. Mastrullo et al [29] developed a simple chart to verify the effectiveness of installation of an IHX using several refrigerants, and they also sustained that the vapour heat capacity is the most influential property on the performance resulting.…”

Section: Introductionmentioning

confidence: 99%

Drop-in analysis of an internal heat exchanger in a vapour compression system using R1234ze(E) and R450A as alternatives for R134a

Mota-Babiloni

Navarro-Esbrí

Barragán-Cervera

et al. 2015

Energy

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Keywords:Internal heat exchanger R1234ze(E) R134a R450A Energy efficiency Refrigeration a b s t r a c tThe IHX (internal heat exchanger) is introduced in some refrigeration systems in order to achieve higher energy performances. Results obtained vary greatly depending on the refrigerant used and working conditions. This paper describes a drop-in analysis of IHX effects on the performance of a vapour compression system using R1234ze(E) and R450A (R134a/R1234ze(E) commercial mixture) as R134a low-GWP replacements. The tests were carried out in a completely monitored vapour compression system varying the condensing and evaporating temperature, with and without a counter-current flow tube-in-tube IHX. Because the cooling capacity rises and the power consumption remains similar, the conclusion is that the IHX has a positive influence on the energy efficiency for all refrigerants tested. The COP (coefficient of performance) gain using R1234ze(E) is the highest observed (overcomes the R134a COP for the same conditions). The R1234ze(E) and R450A discharge temperature increments are lower than those of R134a so does not reach dangerous values and the IHX pressure drops are also below than that of R134a.

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Section: Introductionmentioning

confidence: 99%

Drop-in analysis of an internal heat exchanger in a vapour compression system using R1234ze(E) and R450A as alternatives for R134a

Mota-Babiloni

Navarro-Esbrí

Barragán-Cervera

et al. 2015

Energy

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“…We performed simulation of refrigerating system with SLHX using the mathematical model presented in [16,17] with refrigerant properties from [18] and compressors parameters from [19]. According to the simulation, smaller liquid line diameter also has additional advantage in the systems comprising of counter-flow welded tube SLHX.…”

Section: Features Of Eutectic Systems and The Baseline Systemmentioning

confidence: 99%

Low Charge Transport Refrigerator (Ii). Theoretical and Experimental Investigation

Vaitkus

2012

mech

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“…Meier, 1995;Gan et al, 2000;Dagilis et al, 2004), studies dealing with exergetic aspects of household refrigerators (Bridges et al, 2001) and pulse tube refrigerators (Ya-Ling et al, 2006) are a few in numbers, while those of refrigeration systems are much in numbers (i.e. Yumrutas et al, 2002;Stegou-Sagia and Paignigiannis, 2003;Alexis, 2005).…”

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Thermoeconomic analysis of household refrigerators

Hepbaşlı

2007

Int. J. Energy Res.

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SUMMARYThis study deals with thermoeconomic analysis of household refrigerators for providing useful insights into the relations between thermodynamics and economics. In the analysis, the EXCEM method based on the quantities exergy, cost, energy and mass is applied to a household refrigerator using the refrigerant R134a. The performance evaluation of the refrigerator is conducted in terms of exergoeconomic aspects based on the various reference state temperatures ranging from 0 to 208C. The exergy destructions in each of the components of the overall system are determined for average values of experimentally measured parameters. Exergy efficiencies of the system components are determined to assess their performances and to elucidate potentials for improvement. Thermodynamic loss rate-to-capital cost ratios for each components of the refrigerator are investigated. Correlations are developed to estimate exergy efficiencies and ratios of exergy loss rate-to-capital cost as a function of reference (dead) state temperature. The ratios of exergy loss rates to capital cost values are obtained to vary from 2.949 Â 10 À4 to 3.468 Â 10 À4 kW US$ À1. The exergy efficiency values are also found to range from 13.69 to 28.00% and 58.15 to 68.88% on the basis of net rational efficiency and product/fuel at the reference state temperatures considered, respectively. It is expected that the results obtained will be useful to those involved in the development of analysis and design methodologies that integrate thermodynamics and economics.

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Liquid–gas heat exchanger for household refrigerator

Cited by 7 publications

References 0 publications

Drop-in analysis of an internal heat exchanger in a vapour compression system using R1234ze(E) and R450A as alternatives for R134a

Drop-in analysis of an internal heat exchanger in a vapour compression system using R1234ze(E) and R450A as alternatives for R134a

Low Charge Transport Refrigerator (Ii). Theoretical and Experimental Investigation

Thermoeconomic analysis of household refrigerators

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