Energy and exergy analysis of a new ejector enhanced auto-cascade refrigeration cycle

Yan, Gang; Chen, Jiaheng; Yu, Jianlin

doi:10.1016/j.enconman.2015.07.087

Cited by 98 publications

(13 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this study, the friction loss of the mixing process was considered, and the mixing efficiency η mix [ 36 ] was introduced to obtain the velocity at the mixing chamber outlet.…”

Section: Cycle Description and Simulation Modelmentioning

confidence: 99%

Thermodynamic Analysis of Transcritical CO2 Ejector Expansion Refrigeration Cycle with Dedicated Mechanical Subcooling

Wang

Zheng

et al. 2019

Entropy

View full text Add to dashboard Cite

: The new configuration of a transcritical CO2 ejector expansion refrigeration cycle combined with a dedicated mechanical subcooling cycle (EMS) is proposed. Three mass ratios of R32/R1234ze(Z) (0.4/0.6, 0.6/0.4, and 0.8/0.2) were selected as the refrigerants of the mechanical subcooling cycle (MS) to further explore the possibility of improving the EMS cycle’s performance. The thermodynamic performances of the new cycle were evaluated using energetic and exergetic methods and compared with those of the transcritical CO2 ejector expansion cycle integrated with a thermoelectric subcooling system (ETS). The results showed that the proposed cycle presents significant advantages over the ETS cycle in terms of the ejector performance and the system energetic and exergetic performances. Taking the EMS cycle using R32/R1234ze(Z) (0.6/0.4) as the MS refrigerant as an example, the improvements in the coefficient of performance and system exergy efficiency were able to reach up to 10.27% and 15.56%, respectively, at an environmental temperature of 35 C and evaporation temperature of −5 C. Additionally, the advantages of the EMS cycle were more pronounced at higher environmental temperatures.

show abstract

“…In this study, the friction loss of the mixing process was considered, and the mixing efficiency η mix [ 36 ] was introduced to obtain the velocity at the mixing chamber outlet.…”

Section: Cycle Description and Simulation Modelmentioning

confidence: 99%

Thermodynamic Analysis of Transcritical CO2 Ejector Expansion Refrigeration Cycle with Dedicated Mechanical Subcooling

Wang

Zheng

et al. 2019

Entropy

View full text Add to dashboard Cite

show abstract

“…It is useful to identify the locations, magnitudes, and causes of process inefficiencies [20]. Exergy analysis is a powerful tool for designing, optimization, and performance evaluation of energy systems and it is aimed to determine the maximum performance of the system with overcoming exergy destructions [21,22].…”

Section: Exergy Analysismentioning

confidence: 99%

Performance improvement potentials of low global warming potential refrigerants for intercity bus air conditioning system

Ünal¹,

Kutlu²,

Erdinç³

2018

THERM SCI

View full text Add to dashboard Cite

Original scientific paper https://doi.org/10.2298/TSCI160704084UIn this study, theoretical investigation of two evaporator ejector refrigeration system was carried out based on energy and exergy analysis using R134a and low global warming potential refrigerants (namely R1234yf and R1234ze(E)). In order to perform the analyses, a simulation model was developed and then the influence of different parameters on the COP, COP increase rate and exergy destructions were discussed for each refrigerant. The model was validated with experimental data for R134a and later used to predict the behavior with R1234yf and R1234ze(E). It was found that the highest exergy destruction occurs in the R1234yf system and the increase rate in the COP with respect to the conventional system by using ejector as an expansion device are 15% for R134a, about 17% for R1234yf and about 15% for R1234ze(E), respectively.

show abstract

“…In order to further evaluate the intensity of the irreversibility at every cycle component, the exergy analysis is employed in the study to further explore the thermodynamic performance of the two systems [9][10][11].…”

Section: Thermal Analysis Of the Systemmentioning

confidence: 99%

Energy and Exergy Analysis of a Refrigeration System with Vapor Injection Using Reciprocating Piston Compressor

Tang¹,

Zheng²,

Yang³

et al. 2017

Proceedings of the 2nd 2016 International Conference on Sustainable Development (ICSD 2016)

View full text Add to dashboard Cite

Energy and exergy analysis of a new ejector enhanced auto-cascade refrigeration cycle

Cited by 98 publications

References 27 publications

Thermodynamic Analysis of Transcritical CO2 Ejector Expansion Refrigeration Cycle with Dedicated Mechanical Subcooling

Thermodynamic Analysis of Transcritical CO2 Ejector Expansion Refrigeration Cycle with Dedicated Mechanical Subcooling

Performance improvement potentials of low global warming potential refrigerants for intercity bus air conditioning system

Energy and Exergy Analysis of a Refrigeration System with Vapor Injection Using Reciprocating Piston Compressor

Contact Info

Product

Resources

About