4.6 Article

Experimental investigation of a two-phase ejector installed into the refrigeration system for performance enhancement

Related references

Note: Only part of the references are listed.
Article Energy & Fuels

Optimization of motive nozzle position in a modified two-phase ejector expansion household refrigeration cycle using an artificial neural network

Yongseok Jeon et al.

Summary: This study investigates the influence of the motive nozzle exit position (NXP) on the performance of a dual evaporator ejector cycle (DEEC) in a household refrigeration system. An artificial neural network (ANN) model is used to analyze the pressure lifting ratio and coefficient of performance (COP) of the DEEC under various operating and ejector geometry conditions. The optimal NXP is proposed to achieve maximum performance in the DEEC, resulting in a COP that is 2.3% and 8.4% higher than those of the conventional NXP and the baseline cycle, respectively.

ENERGY REPORTS (2022)

Article Engineering, Mechanical

Energy conservation in vapour compression refrigeration system using vapour injection technique

Chandramohan Rajamani et al.

Summary: This paper investigates the use of vapor injection in rotary compressors, which significantly increases cooling capacity and coefficient of performance while meeting indoor conditions.

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING (2021)

Article Thermodynamics

Feasibility study and in-depth performance assessment of needle valve using as expansion device in refrigeration system

Kittiwoot Sutthivirode et al.

Summary: The needle valve (NEV) shows great potential as an expansion device in VCR, with its COP similar to TEV and better than CT. Economic assessment indicates that NEV has similar cost-effectiveness to TEV and higher than CT. Overall, NEV can efficiently be used as an expansion device in VCR.

CASE STUDIES IN THERMAL ENGINEERING (2021)

Article Energy & Fuels

Performance evaluation of CO2 supermarket refrigeration system with multi-ejector and dedicated mechanical subcooling

Xi Liu et al.

Summary: The paper proposes a CO2 supermarket refrigeration system using multi-ejector and dedicated mechanical subcooling, which greatly improves system performance and energy efficiency in diverse climate types in China.

ENERGY REPORTS (2021)

Article Energy & Fuels

Analysis on the optimal mixing pressure and efficiency limit of an ideal ejector

Jielin Luo et al.

Summary: This paper investigates the upper limit of ejector performance by constructing an ideal ejector and thermodynamically optimizing its working process to achieve minimal entropy generation. The analytical solutions for optimal mixing pressure and maximal entrainment ratio are deduced for ideal gas working conditions. The thermodynamic upper limits provided in this study offer a more reasonable benchmark for evaluating ejector performance compared to previous models.

ENERGY REPORTS (2021)

Article Thermodynamics

Sizing and control rules of dedicated mechanical subcooler in transcritical CO2 booster systems for commercial refrigeration

G. Cortella et al.

Summary: The use of Dedicated Mechanical Subcoolers in commercial refrigeration plants requires an optimization process involving various factors such as gas cooler pressure, activation and setpoint temperature values, subcooling degree, and subcooler size to improve energy efficiency while considering costs. The study reveals that the size of the DMS is crucial in hot climate conditions, with potential energy savings of up to 3.5% and optimal control rules should be adopted at mild-warm conditions. Energy use is identified as the most significant cost item in the economic analysis.

APPLIED THERMAL ENGINEERING (2021)

Article Thermodynamics

CFD simulation of vortex flashing R134a flow expanded through convergent-divergent nozzles

Jingwei Zhu et al.

INTERNATIONAL JOURNAL OF REFRIGERATION (2020)

Article Thermodynamics

Experimental enhancement of a CO2 transcritical refrigerating plant including thermoelectric subcooling

D. Sanchez et al.

INTERNATIONAL JOURNAL OF REFRIGERATION (2020)

Article Thermodynamics

Experimental study on the separator in ejector-expansion refrigeration system

Chen Lin et al.

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID (2019)

Article Thermodynamics

Numerical study of high-speed two-phase ejector performance with R134a refrigerant

Sunghoon Baek et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2018)

Article Thermodynamics

Performance improvement of a transcritical CO2 refrigeration cycle using two-stage thermoelectric modules in sub-cooler and gas cooler

Siamak Jamali et al.

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID (2017)

Article Thermodynamics

Experimental investigation on motive nozzle throat diameter for an ejector expansion refrigeration system

Nagihan Bilir Sag et al.

ENERGY CONVERSION AND MANAGEMENT (2016)

Article Thermodynamics

Preliminary experimental results on the R134a refrigeration system using a two-phase ejector as an expander

H. Kursad Ersoy et al.

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID (2014)

Article Engineering, Multidisciplinary

Effect of evaporator temperature on vapor compression refrigeration system

Abdullah A. A. A. Al-Rashed

ALEXANDRIA ENGINEERING JOURNAL (2011)

Article Energy & Fuels

Performance improvement of the vapour compression refrigeration cycle by a two-phase constant area ejector

Nagihan Bilir et al.

INTERNATIONAL JOURNAL OF ENERGY RESEARCH (2009)

Article Thermodynamics

Performance characteristics of natural-refrigerants-based ejector expansion refrigeration cycles

J. Sarkar

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY (2009)