Abstract
Exergy analysis and performance of a Ranque–Hilsch Vortex Tube (RHVT) with various nozzle cross-section areas (NCSA = 3 × 3, 4 × 4, 5 × 5 mm 2) were determined under inlet pressures ( P i) of 260, 300 kPa (absolute) pressurized air. The maximum difference in the temperatures of hot output and cold output streams was obtained for NCSA = 3 × 3 mm 2. The total inlet exergy ( ∑ E ˙ i ) , total outlet exergy ( ∑ E ˙ O ) , total lost exergy ( ∑ E ˙ Lost ) and exergy efficiency ( η, %) were calculated. It was determined that the exergy efficiency of the system, varied between 1% and 39%, and the highest exergy efficiency was obtained for NCSA = 3 × 3 mm 2. The exergy efficiency strongly depends on the level of P i, ξ and v cold. Variation of the exergy efficiency decreased with decreasing P i, ξ, v cold and the highest and lowest exergy efficiencies were found when the values of P i, ξ, v cold reached maximum and minimum levels, respectively.
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