The vortex tube is a device which uses air as refrigerating fluid since air is abundantly available in nature hence vortex tubes proves to be inexpensive and unhazardous to nature. The vortex tube is a structurally simple device with no moving parts that is capable of separating a high-pressure flow into two lower pressure flows with different energies, usually manifested as a difference in temperatures. Different design approaches are used to manufacture the vortex tube. Literature review reveals investigations to understand the heat transfer characteristics in a vortex tube with respect to various parameters like cross section area of a cold and hot end, nozzle area of inlet compressed air, cold orifice area, hot end area of the tube, and L/D ratio. As such, there is no theory so perfect, which gives the satisfactory explanation of the vortex tube phenomenon as explained by various researchers. Therefore, it was thought to perform experimentation. This paper review about the different design approaches and analysis of them.