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Abstract
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The patterns of heat and mass transfer can be changed using various heat transfer controller angle in Double Circuit vortex tube (DCVT). In this parametric/experimental test, the effective parameter is focused on the heat transfer controller angle in DCVT. The heat transfer controller angle is considered over the range of 20 to 80 degree. The experimental tests indicate that the heat transfer angle should be small and not more than 75 under our experimental tests so there is an optimal heat transfer angle of controller to achieve the highest cooling efficiency. The preliminary experimental results indicate that θ=75 yields the highest cold temperature reduction, which exceeds θ=20 one by about 51.23%. In fact, the optimum model before the optimization was θ=70. Also, The ratio of actual cold temperature difference to the maximum temperature difference, ΔTc / (ΔTc)max, for the vortex tube with truncated cone control valve can be presented as a function of the cold mass ratio.
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