The formation and evaporation of nanodroplets in steam ejectors is neglected many numerical simulations. We analyse the influence a primary nozzle on ejector performances considering phase change processes. model validated detail against experimental data supersonic nozzles available literature. results show that first nonequilibrium condensation observed within nozzle, while under-expanded flo...

One of the issues that need to be addressed in order to improve the durability and efficiency of a PEM fuel cell system is the management of the hydrogen feeding procedure. It has been demonstrated these aspects are improved when a hydrogen recirculation systems are used [1]. In this work, an ejector has been designed and manufactured and implemented in an experimental PEM fuel cell Test Statio...

Dual fuel engines with LNG as have become a feasible solution for ship power units in the current situation, but their efficiency needs to be further enhanced meet increasingly stringent emission requirements. This paper designs dual-loop system, including supercritical CO2 cycle and thermally driven ejector refrigeration cycle, recovering exhaust gas charge air heat of marine dual engine. The ...

Optimization of a High-Efficiency Jet Ejector by Computational Fluid Dynamics Software. (May 2005) Somsak Watanawanavet, B.S., Chulalongkorn University Co-Chairs of Advisory Committee: Dr. Mark T. Holtzapple Dr. Charles J. Glover Research was performed to optimize high-efficiency jet ejector geometry (Holtzapple, 2001) by varying nozzle diameter ratios from 0.03 to 0.21, and motive velocities f...

In this article we have made an attempt to survey some results on performance of jet ejector. The literature is also reviewed to pursue further work in this area. Key wordsHEVS, EVS, jet ejector, performance of venture scrubber, characteristics of jet ejector, efficiency