Effects of working fluid, nozzle number, nozzle material and connection type on thermal performance of a Ranque-Hilsch vortex tube: A review

A vortex tube is a mechanical device which provides instant heating and cooling by separating the hot and cold streams via application of compressed working fluid to the orifice nozzles. Due to its energy separation capability researchers tend to make detailed investigations about vortex tubes recently. In order to make an investigation both numerical and experimental, the common accepted way of scientific researches is reviewing previous researches. Therefore, review studies play a vital role on new studies. In accordance with this phenomenon, this paper presents a comprehensive review about the parameters which affect the thermal performance of a RHVT such as working fluid, nozzle number, nozzle material, circuit connection type and cold mass fraction. The main objective of this study is to lead future investigations about vortex tubes having qualified outcomes.