PERFORMANCE OF 2-STAGE PVC HOT CASCADE TYPE RANQUE-HILSCH VORTEX TUBE

Abstract

Vortex tube is a non-conventional cooling device, having no moving parts which will produce cold air and hot air from the source of compressed air without affecting the environment. When a high pressure air is tangentially injected into vortex chamber a strong vortex flow will be created which will be split into two air streams. It can be used for any type of spot cooling or heating application. In this paper, three Ranque-Hilsch vortex tubes were used, which have 25 mm inside diameter and length/diameter ratio was 12. Their performances were examined as one of the classical Ranque-Hilsch vortex tube and other was hot cascade type Ranque-Hilsch vortex tube. Performance analysis was according to temperature difference between the hot outlet and the inlet (ΔThot.), temperature difference between the inlet and the cold outlet (ΔTcold.) and Coefficient of Performance (COP). The ΔThot values of hot cascade type Ranque-Hilsch vortex tubes were greater than the ΔThot values of classical Ranque-Hilsch vortex tube and ΔTcold values of hot cascade type Ranque-Hilsch vortex tubes were greater than the ΔTcold values of classical Ranque-Hilsch vortex tube, which were determined experimentally. It was found that hot cascade type vortex tube Ranque-Hilsch COP is better than the classical Ranque-Hilsch vortex tube COP.