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G. Maruthi Prasad Yadav ¹, P. Mallikarjuna Reddy ², B. Uma Maheswar Gowd ³

Affiliations
1 Department of Mechanical Engineering, St Johns College of Engg & Technology, Yemmiganur-518360, AP, IN
2 Department of Mechanical Engineering, PVKK Institute of Technology, Anantapur, AP, IN
3 Department of Mechanical Engineering, JNTUA, Anantapur-515002, AP, IN

Abstract

Vortex tube is a simple device injected with pressurized gas through tangential nozzles, creates a strong swirl flow field. This vortex in the inlet causes the pressure distribution of the flow in radial direction. As a result a free vortex is produced as the peripheral warm stream escapes through opening of conical valve and a forced vortex as the inner cold stream escapes through orifice. The performance of vortex tube mainly depends on the flow pattern. The inlet at the nozzle and exit at the hot end are key parameters that affect the flow pattern. So the main intention of this work is to investigate the effect of inlet nozzle number and conical angle of control valve at hot end. The results revealed that temperature drop increases with increase of nozzle number whereas the same is increasing with increasing conical angle up to 45° and decreasing thereafter.

Keywords

Nozzle, Conical Angle, Control Valve, Temperature Drop.

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D. Raja Sekhar ¹, U. Preeti Rao ², P. Mallikarjuna Reddy ³

Affiliations
1 GITAM University, Visakhapatnam, IN
2 GIET, Rajahmundry, IN
3 SJCET, Emmiganur, Kurnool, IN

Abstract

The Magneto Caloric Effect is an intrinsic property of a magnetic solid. It is the response of this solid to the application or removal of magnetic fields. When magnetic material (Regenerator) is subjected to a magnetic field the magnetic moments are aligned and the magnetic entropy is lower. And the sample heats up when the field is removed the magnetic entropy is increased and the temperature is lowered. The magnitude of the magnetic entropy and the adiabatic temperature changes are strongly dependent upon the magnetic order process. The objective of this work is to investigate the effect of magnetic field on the regenerator bed. The entropy depends not only on temperature but also on some other quantity, in this case magnetic field. Therefore, these materials can be forced to undergo various types of thermodynamic cycles that cause entropy to move from a low temperature to a high temperature due to a work input. A Finite Element model is built and meshed in ANSYS 10.0 Emag Module. Thermal analysis is done on the magnetic material using commercial FEA software ANSYS 10.0. Magnetic field distributions can be estimated using ANSYS Electromagnetic analysis.

Keywords

Magnetic Field Distribution, Magnetic Refrigeration, Finite Element Analysis.

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