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Received: 5 October 2019 Accepted: 25 December 2019 Energy separation procedure of vortex tube can be improved by using truncated cone throttle valve. Experiments are performed to study the effect of the geometrical parameters on vortex tube refrigeration capacity by using air as the working fluid. In this experimental investigation, the parameters are focused on the cone length of throttle valve, inlet pressure and number of nozzle intakes. The effect of the cone length of throttle valve is also investigated in the range from 0 to 10 mm. The results present that there is an optimum cone length for obtaining the highest efficiency and φ=6mm is the optimal candidate under our experiments. A computational fluid dynamics model was developed to predict the performances of the vortex tube system. The numerical investigation was carried out by full 3D steady state CFD-simulation using FLUENT 6.3.26. This model utilizes the k-ε turbulence model to solve the flow equations.

Experimental and Three-Dimensional Investigation on Thermal Performance of a Vortex Tube