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

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 s treams. It can be used for any type of spot cooling or heating application. In this paper, three Ranque - Hilsch vort ex tubes were used, which have 25 mm inside diameter and length/diameter ratio was 12 . Their performances were examined as one of the classic al 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 (?T hot .) , temper ature difference between the inlet and the cold outlet (?T cold .) and Coefficient of Performance (COP). The ?T hot values of hot cascade type Ranque - Hilsch vortex tubes were greater than the ? T hot values of clas sical Ranque - Hilsch vortex tube and ? T cold values of hot cascade type Ranque - Hilsch vortex tubes were greater than the ?T cold 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.