Expansion work recovery by two-phase ejector is known to be beneficial to vapor compression cycle performance. However, one of the biggest challenges with ejector vapor compression cycle is that the ejector cycle performance is sensitive to working condition changes which are common in real world applications. Different working conditions require different ejector geometries to achieve maximum ...

This work addresses the optimization of ammonia–water absorption cycles for cooling and refrigeration applications with economic and environmental concerns. Our approach combines the capabilities of process simulation, multi-objective optimization (MOO), cost analysis and life cycle assessment (LCA). The optimization task is posed in mathematical terms as a multi-objective mixed-integer nonline...

Machining operation and presence of water droplets cause increase the surface roughness wet steam ejector walls change its performance in refrigeration cycle. The purpose this work is to investigate influences primary nozzle on ejectors cycle with as a working flow. Eulerian-Eulerian model validated by comparison numerical results experimental data. Moreover, different has been successfully app...

Ejectors are simple mechanical devices with no moving parts which convert the pressure energy of a motive fluid to kinetic and generate suction secondary fluid. The ability recover waste heat, operate using solar power use geothermal make ejector-based systems attractive in different industrial applications. main challenge refrigeration is their relatively low coefficient performance (COP). In ...

This paper presents the analysis of a two phase flow ejector for the transcritical CO2 cycle. A detailed simulation model of a two phase flow ejector was developed. A controllable ejector expansion device was designed, constructed, and installed in a transcritical CO2 experimental air conditioning system. System-level experimental results were obtained at different operation conditions and vari...

In this study, a novel dual-nozzle ejector enhanced vapor-compression cycle (DEVC) for solar assisted airsource heat pump systems is proposed. In DEVC, the use of the dual-nozzle ejector for recovering the expansion losses is a very promising approach to improve the cycle performance. A mathematical model of the DEVC is developed to predict its performance under specified operating conditions. ...