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The paper presents the analysis of the energy performance of an air vortex cooling tube under variations of the
air inlet properties, with three independent experimental tests validated through the energy balance in the device.
The experimental analysis includes the following variations of the input conditions: First, the effect of the air inlet
pressure to the vortex tube, focused on the analysis of temperature variations in the output cold stream and in the cooling
capacity when the cold flow fraction varies. Second, we studied air inlet temperature variations to the vortex tube under
different cold flow fractions, which is an analysis not found in the literature. And finally, is studied the performance of the
vortex tube when the insulation is provided or in absence of insulation.