An experimental investigation on exergy analysis of an ejector expansion refrigeration system

Sağ, Nagihan Bilir; Ersoy, H. Kursad; Hepbaşlı, Arif

doi:10.1504/ijex.2017.087654

Cited by 4 publications

(4 citation statements)

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“…Upon juxtaposing their findings with our own results for the purpose of comparative analysis, it was ascertained that the discrepancy manifested in an error rate of 2.5%. [ 29 ] In the same study, when the cooling capacity was taken as 4.20 kW, the COP value was found to be 2.39 for EERC when compared for 60 °C condenser temperature, 10 °C evaporator temperature, and 40.3 °C condenser inlet temperature parameters. Compared to our results, an error rate of 3.01% was obtained.…”

Section: Resultsmentioning

confidence: 94%

“…Compared to our results, an error rate of 3.01% was obtained. [ 29 ] Also, they observed a COP value of 2.22 for the EERC when the cooling capacity was set at 4.36 kW. This was done under specific conditions, including a 60 °C condenser temperature, 10 °C evaporator temperature, and 42.9 °C condenser inlet temperature.…”

Section: Resultsmentioning

confidence: 99%

“…Bilir Sag et al [29] 2 isentropic efficiency correlation (Equation ( 23)) used in the Udroi et al study, the highest COP was found to be 0.89, while the result of the analysis made with Equation ( 1) was found to be COP = 1.11. [7] Since the compressor isentropic efficiency formula in Equation ( 1) was used in the continuation of this study, this conversion has been made so that the comparison can be correct.…”

Section: Kwmentioning

confidence: 97%

“…Comparison between the theoretical results of this study and experimental results of Bilir Sag et al for EERC. [29] Researcher Refrigerant (R134a) COP -…”

Section: Thermodynamic Analysis Comparisonmentioning

confidence: 99%

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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

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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.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Kwmentioning

confidence: 97%

“…Comparison between the theoretical results of this study and experimental results of Bilir Sag et al for EERC. [29] Researcher Refrigerant (R134a) COP -…”

Section: Thermodynamic Analysis Comparisonmentioning

confidence: 99%

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