Exergy analysis of a domestic refrigerator using eco-friendly R290/R600a refrigerant mixture as an alternative to R134a

Saravanakumar, R.; Selladurai, V.

doi:10.1007/s10973-013-3264-3

Cited by 55 publications

(16 citation statements)

References 24 publications

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“…Measurement results were used for the proposed new heat transfer correlation to determine the value of the shell-side heat transfer coefficient. The starting point of the new correlation was the general form of the equation to determine the heat transfer coefficient [10]:…”

Section: Results In the Evaporatormentioning

confidence: 99%

Measurement testing of heat transfer coefficients in the evaporator and condenser of heat pumps

Sánta¹,

Garbai

2014

J Therm Anal Calorim

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In our earlier studies, it has been stated that the validity and limits of correlations developed for the calculation of heat transfer processes in the evaporator and condenser of heat pumps are not published in general. The values yielded for model structures and process characteristics indicate extreme ranges of standard deviation. While the description and physical and mathematical modeling of phenomena occurring in heat pump components have developed really much and the mathematical accuracy of solutions can be increased at one's own discretion, descriptions of changes in heat transfer and heat transfer coefficients in the course of refrigerant flow are quite uncertain. At the same time, these factors highly influence the accuracy of the solution. Our study presents the measurements and the new proposed heat transfer correlations, developed on the basis of such measurements, which can be used for calculating heat transfer in heat pump evaporators and condensers with higher accuracy than existing correlations in the literature.Keywords Evaporator Á Heat transfer coefficient Á Heat pump Á Condenser Á R134aList of symbolsVolumetric flow rate (m 3 h -1 ) M Molecular mass (kg kmol -1 )Greek letters a Heat transfer coefficient (Wm -2 K -1 ) k Thermal conductivity (Wm -1 K -1 ) q Density (kg m -3 )

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Section: Results In the Evaporatormentioning

confidence: 99%

Measurement testing of heat transfer coefficients in the evaporator and condenser of heat pumps

Sánta¹,

Garbai

2014

J Therm Anal Calorim

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“…Also, an exergy analysis of domestic refrigerator using eco-friendly R290/R600a refrigerant mixture as an alternative to R134a revealed an improvement of 28.5 % in COP for combination of R290/R600a mixture when compared to R134a. The findings of the study, however, also stated that combination of R290/ R600a showed the highest average exergetic efficiency at an evaporator temperature -10°C [14]. An estimation of chemical exergy of solid, liquid and gaseous fuels used in thermal power plants revealed that chemical exergy of the fuel is mostly influenced by the chemical composition as well as ratio of hydrogen and carbon in the fuel.…”

Section: Introductionmentioning

confidence: 82%

Thermodynamic optimization and chemical exergy quantification for absorption-based refrigeration system

Gupta

Anand

et al. 2015

J Therm Anal Calorim

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The present article suggests a thermodynamic analysis of flat-plate collector-based single-effect ammonia-water vapor absorption refrigeration system. The investigation involves the development of numerical and computational model based on physical and chemical exergies for the analysis of single-effect absorption systems. The investigation revealed that various operating parameters influence COP, exergy loss in different components as well as exergy efficiency. The COP cooling , COP heating and exergy efficiency show a decreasing trend with an increase in the generator temperature (60-100°C) and lie in the range of 0.398-0.435, 1.39-1.43 and 0.1421-0.2975, respectively. The COP cooling and COP heating show an increasing trend with an increase in the evaporator temperature, whereas exergy efficiency shows a decreasing trend with an increase in the evaporator temperature. However, The COP cooling , COP heating and exergy efficiency show a decreasing trend with an increase in absorber and condenser temperature. The variation in physical ðW PH loss Þ and chemical exergy losses ðW CH loss Þ with ambient temperature has also been discussed in the analysis. It is noticed that the highest percentage of non-dimensional physical and chemical exergy losses are found to be in the generator. The second worst component from the non-dimensional physical and chemical irreversibility viewpoints is the absorber, followed by solution heat exchanger, evaporator and condenser.

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“…Thesedays, maximumenergy is wasted for the purpose of cooling and air conditioning in both domestic and industrial fronts. However the refrigerants with the help of which cooling and air-conditioning are achieved have increased global warming and are reasons forozone layer depletion [8] . The prerequisiteof an ideal refrigerantis to possess good physical as well as chemical properties by which refrigerants should be non-toxic, non-flammable and have low boiling point.…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of VCR System with Air-Cooled Condenser Working With Refrigerants R-134a & Hydrocarbon

Kumar,

Jha

2019

IJEAT

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This paper gives a detailed exergy analysis of a Vapour Compression Refrigeration System with the refrigerants R-134a and HC (mixture of R-290/R-600a). The aim of this paper is to find out the Exergy Analysis, Exergetic efficiency, Exergy Product, Exergy Destruction Ratio (EDR), Co-efficient of performance and 2nd law efficiency for the main components of the system such as compressor, condenser, evaporator and expansion device (throttle valve). The objective of this work is to find out an exergy analysis of the Hydrocarbon refrigerant as an alternative for R-134a. The VCRS performance using R134a will be evaluated for the effect of evaporating temperature on COP, exergetic efficiency and EDR and then compared with Hydrocarbon refrigerant. Due to prevention of GWP (Global Warming Potential), Hydrocarbon and R-134a are used as refrigerants to give better result for domestic refrigerator operation[8] .

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Exergy analysis of a domestic refrigerator using eco-friendly R290/R600a refrigerant mixture as an alternative to R134a

Cited by 55 publications

References 24 publications

Measurement testing of heat transfer coefficients in the evaporator and condenser of heat pumps

Measurement testing of heat transfer coefficients in the evaporator and condenser of heat pumps

Thermodynamic optimization and chemical exergy quantification for absorption-based refrigeration system

Exergy Analysis of VCR System with Air-Cooled Condenser Working With Refrigerants R-134a & Hydrocarbon

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