Thermodynamic analysis of auto-cascade refrigeration cycles, with and without ejector, for ultra low temperature freezing using a mixture of refrigerants R600a and R1150

Rodríguez-Jara, Enrique Ángel; Sánchez-de-la-Flor, Francisco José; Carrillo, José Antonio Expósito; Salmerón-Lissén, José Manuel

doi:10.1016/j.applthermaleng.2021.117598

Cited by 49 publications

(10 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[18] The properties of the refrigerants used in this study are given in Table 2. [10,[19][20][21][22][23] In Figure 5, a computational flow chart is provided for the method used in the analysis of CEIRC. First, the thermodynamic modeling of the ejector is solved, followed by the analysis of the refrigeration cycle with energy, exergy, and environmental effects.…”

Section: Thermodynamic Analyses Of the Systemmentioning

confidence: 99%

“…Within this scope, newly developed refrigeration cycles incorporating ejectors have been comprehensively investigated in the literature. [6,10,11] Chen et al utilized a cascade mechanical compression ejector refrigeration cycle as the lower cycle and a heat-driven ejector refrigeration cycle as the upper cycle. The working fluids for the ejector refrigeration cycle included R245ca, R600, and R601b, and the findings demonstrated that their maximum increased COP values were 0.95%, 1.33%, and 1.16%, respectively.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermodynamic and Environmental Analysis of Novel Cascade Refrigeration Cycles with Ejector and Intercooler for Ultralow Temperatures Using Eco‐Friendly Refrigerants

Hacıpaşaoğlu,

Öztürk

2023

Energy Tech

View full text Add to dashboard Cite

The present study introduces a novel cascade ejector intercooler refrigeration cycle (CEIRC) and a novel cascade ejector booster refrigeration cycle (CEBRC), which are designed to improve ultralow temperature (ULT) refrigeration system performance based on various refrigerants in terms of energy, exergy, and environment. Through the analysis conducted with eco‐friendly refrigerants for CEIRC, the refrigerant pair exhibits the highest performance that is found to consist of RE170 for high‐temperature cycles and R170 for low‐temperature cycles. These refrigerants have very low global warming potential and are eco‐friendly. The coefficient of performance (COP) reveals improvements of 3.20–9.51%, 10.55–19.12%, and 31.96–65.97% over the CEBRC, cascade ejector refrigeration cycle (CERC), and cascade vapor compression refrigeration cycle (CVCRC), respectively, resulting in corresponding exergy efficiency improvements of 3.18–9.49%, 10.48–19.12%, and 31.87–65.98%. The total compressor power and exergy destruction are also compared, indicating that the CEIRC exhibits the best performance among the four. CEIRC achieves a COP increase of 11.6% compared with the cascade refrigeration cycle, which is considered the cycle with the highest performance operating at ultralow temperatures in the literature, which is CERC. The kg CO2 effect of the CEIRC is 11.35% lower than that of the CERC.

show abstract

Section: Thermodynamic Analyses Of the Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermodynamic and Environmental Analysis of Novel Cascade Refrigeration Cycles with Ejector and Intercooler for Ultralow Temperatures Using Eco‐Friendly Refrigerants

Hacıpaşaoğlu,

Öztürk

2023

Energy Tech

View full text Add to dashboard Cite

show abstract

“…Mota-Babiloni et al [25] concluded that using ejectors has recently been considered in research papers in auto-cascade architectures. Rodríguez-Jara et al [26] thermodynamically evaluated natural refrigerants R-600a and R-1150 in auto-cascade ultra-low temperature applications, ranging from −50°C to −100°C. The ejector as an expansion device improved the COP up to 12%, with an optimal R-1150 mass fraction of 0.45.…”

Section: Introductionmentioning

confidence: 99%

Two-stage cascade configurations based on ejectors for ultra-low temperature refrigeration with natural refrigerants

Udroiu¹,

Mota-Babiloni²,

Giménez-Prades³

et al. 2023

International Journal of Thermofluids

View full text Add to dashboard Cite

“…In recent years, in response to the current COVID-19 pandemic, the ultra-low temperature (UTL) around − 80 °C is increasingly demanded in biomedical areas such as the cryopreservation of new vaccines and cryosurgery. Economical refrigeration in the ULT range cannot be achieved with standard single-stage systems because of the required high compression ratio, which leads to a low efficiency and high discharge temperature [ 2 ]. Principally, temperatures below − 40 °C can be obtained by multi-stage compression refrigeration cycles, cascade refrigeration cycles and auto-cascade refrigeration cycles (ARC) [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, Bai et al [ 14 , 15 ] also studied a two-stage ARC, and results show that by adding an ejector to the system can boost the exergy efficiency and COP by 25.1% and 9.6%, respectively. Rodríguez-Jara et al [ 2 ] used an ejector as the expansion valve in ARC and found that the COP was increased by 12%. This study also indicates that the mixture of R1150/R600a is a suitable combination for ARC.…”

Section: Introductionmentioning

confidence: 99%

Energy and exergy analysis of a modified three-stage auto-cascade refrigeration cycle using low-GWP refrigerants for sustainable development

Qin

Zhang

et al. 2022

J Therm Anal Calorim

View full text Add to dashboard Cite

This study proposed a modified three-stage auto-cascade refrigeration cycle (MTARC) operating with environmentally benign zeotropic mixture of R1234yf/R170/R14 at the refrigeration temperature level of − 80 °C. Compared with the conventional three-stage auto-cascade refrigeration cycle (CTARC), MTARC incorporates an additional pressure regulator between the condenser and separator to realize phase separation at a lower pressure and temperature. A comprehensive evaluation of energy and exergy performance of the two cycles was conducted theoretically. Under a typical working condition, the cooling capacity, COP and exergy efficiency of the MTARC are improved by 15.85%, 11.69% and 7.65% in comparison with the CTARC, respectively. In addition, a lower evaporating temperature was also obtained by the MTARC under the same operating condition. When the intermediate pressure drops from 2 to 1 MPa, the cooling capacity, COP and exergy efficiency are improved by 35.43%, 25.25% and 16.74%, respectively, for the MTARC, meanwhile the compressor outlet temperature increases 19.93 °C from 92.27 to 112.20 °C. Therefore, the selection of the intermediate pressure should be comprehensively considered to ensure a desirable cycle performance and a proper working condition for the compressor. The proposed modified cycle offers new pathways for designing innovative cryogenic refrigeration systems, thereby potentially improving the energy economy in a myriad of modern energy applications for sustainability concerns.

show abstract

Thermodynamic analysis of auto-cascade refrigeration cycles, with and without ejector, for ultra low temperature freezing using a mixture of refrigerants R600a and R1150

Cited by 49 publications

References 46 publications

Thermodynamic and Environmental Analysis of Novel Cascade Refrigeration Cycles with Ejector and Intercooler for Ultralow Temperatures Using Eco‐Friendly Refrigerants

Thermodynamic and Environmental Analysis of Novel Cascade Refrigeration Cycles with Ejector and Intercooler for Ultralow Temperatures Using Eco‐Friendly Refrigerants

Two-stage cascade configurations based on ejectors for ultra-low temperature refrigeration with natural refrigerants

Energy and exergy analysis of a modified three-stage auto-cascade refrigeration cycle using low-GWP refrigerants for sustainable development

Contact Info

Product

Resources

About