The vapor jet ejector cooling cycle driven by waste heat. It is a very auspicious approach of producing ‘free cooling’ by utilizing low-grade energy sources. The mechanism behind the ejector-based on waste heat cooling is very unique, when compared to absorption or adsorption cooling technologies. They are also aimed at producing heat driven cooling. This type of ejector cooling system is actually more closely related to vapor compression technology.
In this paper simulations of a vapor-jet ejector operating with refregerent R134a as the working fluid by using CFD (computational fluid dynamics). The impact of varying geometry parameters on ejector performance will be considered. Different mixing section radii will be considered for the analysis.3D modeling is done by using Catia V5 and analysis is done by Ansys fluent14.5.
International Journal of Research and Innovation on Science, Engineering and Technology (IJRISET)
CFD ANALYSIS ON EJECTOR COOLING SYSTEM WITH VARIABLE THROAT
Srihari Anusuri1, A.Sirisha Bhadrakali2, V.V.Kamesh3.
1 Research Scholar, Department of Mechanical Engineering, Aditya Engineering College, Surampalem, Andhra Pradesh, India.
2 Assistant Professor, Department of Mechanical Engineering, Aditya Engineering College, Surampalem, Andhra Pradesh, India.
3 Associate Professor, Department of Mechanical Engineering, Aditya Engineering College, Surampalem, Andhra Pradesh, India.
Research Scholar,Department of Mechanical Engineer-
ing, Aditya Engineering College, Surampalem, Andhra
Year of publication: 2016
Review Type: peer reviewed
Volume: III, Issue : I
Citation:Srihari Anusuri, Research Scholar "Cfd Analy-
sis on Ejector Cooling System With Variable Throat Ge-
ometry" International Journal of Research and Innova-
tion on Science, Engineering and Technology (IJRISET)
EJECTOR WORKING PRINCIPLE
As outlined in a typical ejector consists of a motive nozzle,
a suction chamber, a mixing section and a diffuser. The
working principle of the ejector is of converting internal
energy and pressure related flow work contained in the
motive fluid stream into kinetic energy. The motive nozzle
is a converging-diverging design. It allows the high-speed
jet to become supersonic.
Schematic of a typical two-phase ejector design
Depending on the state of the primary fluid, the flow at
the motive nozzle exit might be 2-phase. Flashing of the
primary flow inside the nozzle might be delayed due to
thermodynamic and hydrodynamic non-equilibrium ef-
fects. The high-speed jet initiates the interaction with the
secondary fluid which is inside the suction chamber. Mo-
mentum is transferred from the primary flow to the sec-
ondary flow. For the stagnant suction flow an additional