International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 06 | June-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 1971 TO INVESTIGATE THE EFFECT OF SPINNER GEOMETRY ON COP OF VORTEX TUBE REFRIGERATION Chetan K Dhuwe 1 ,Bhojraj N Kale 2 ,Mangesh V Dhoke 3 1 Student, M-Tech, Heat Power Engineering, DBACER, Nagpur, Maharashtra, India 2 Assit.Professor, Mechanical Department Engineering, DBACER, Nagpur, Maharashtra, India 3 Lecturer, Mechanical Department Engineering, GHRP, Nagpur, Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - The vortex tube is a simple device used in industry for generation of cold and hot air streams from a single compressed air supply. This simple device is very efficient in separation of air streams of different temperatures. Any fluid (air) that flows and rotates about an axis such as a tornado, is called a vortex. A vortex tube creates a vortex and separates it into two air streams-one hot and one cold. Figure shows how a vortex tube works. Compressed air enters a cylindrical chamber which causes the air to spiral. At the end of the hot tube, a small portion of this air exits through a needle valve as hot air. The remaining air is forced back through the center of the cylindrical tube. This super-cooled air flows through the center of the generator and exits through the cold port and is the required part of our project. The geometry of vortex tube changes in this experiment is spinner notches angle which is situated inside the vortex tube after nozzle. Due to this part the flow of vortex (tornado) form. The angle taken of spinner notches is upto 45 degree. So by changing the different angles (25, 35, 45 degree) the variations in temperature is obtained and COP of vortex tube may be increased. Key Words: VORTEX TUBE, COP, TEMPERATURE, CFD ANALYSIS 1. INTRODUCTION The primary objective for this experiment is to determine the coefficient of performance (cop) of vortex tube by changing the geometry of vortex tube, inside the vortex tube there is a spinner notches which has an definite angle, by changing the angle of this spinner notches the cop may varied. The analysis of this phenomenon is done by using ANSYS CFD FLUENT software. CFD has a full form of Computational Fluid Dynamics, but it’s scopeis not only limited to fluid dynamics. So, when we say computational fluid dynamics, weessentially mean computational transport phenomena, so which involve computational fluid dynamics, heat transfer, mass transfer or any process which involves transport phenomena with it. On CREO PARAMETRIC the three cad model of vortex tube can be made of notches spinner angle of 25˚, 35˚ and 45˚. This models is then call on ANSYS CFD software and analysis will be carry out at different pressures. The minimum cold temperature obtained on any of the model of vortex tube is the efficient vortex tube. COP of all the models of vortex tube is calculated by doing simple calculations and the maximum COP obtained by this calculation based on the temperature is the final result is this experiment. 2. LITERATURE REVIEW Early in the nineteenth century, the great physicist James Clerk Maxwell imagined that someday we might be able to get hot and cold air with the same device with the help of a "friendly little demon" who would sort out and separate the hot and cold molecules of air (Cockreill, 1995). Later his dream had come true. The “friendly little demon” is called vortex tube in 1928, a French physics student George Ranque occasionally found the phenomenon of energy separation in the vortex tube during his experiment with a vortex-type pump developed by him. He noticed that the warm air would be drawn from one end, and the cold air from the other. Later it was discovered that the mechanism is closely related to the swirling flow of the air within the tube. Air molecules in the swirl near the wall of the tube tend to have higher velocity compared to those in the central region of the tube. After energy separation in the vortex tube, the inlet air stream was separated into two air streams: hot air stream and cold air stream, the hot airstream left the tube from one end and the cold air stream left from another end. The outlets from where the hot and cold air streams leaving the tube are called the hot and cold end respectively. In this experimental study of the vortex tube performance has been carried out to investigate the parameters affecting vortex tube operation. Four cases has been studied, in which the influence of the tube length L, the number of entrance nozzles NZ, Cold air orifice diameters dc and inlet pressure under various condition. The effects on these parameters on the Hot and Cold outlet temperature as function of cold air mass ratio (€ ) are discuss and presented. And also the coefficient of performance (COP) Of the vortex tube as a refrigerator and as a heat pump has been calculated. PROCEDURE FOR ANALYSIS A. Creo Modeling of Vortex Tube Steps for making the creo model :