The ejector is a cooling system component developed to prevent energy losses in the throttling valve in conventional cooling systems. Since the cooling systems have a wide application in many different areas, any improvements to be made could have significant energy savings. For this reason, detailed simulation of the ejector system is important. In this study, CFD analysis of the ejector, which is a part of the ejector cooling system with a unique design, was made. It was aimed to prevent energy losses and produce the ideal design by modelling the flow occurring in the ejector with a unique design. The ideal values were evaluated by simulating according to the computational flow design made with the calculated preliminary values. The temperature, pressure and velocity graphs were analysed in 3D and the draft work was detailed. As a result, an ejector with ideal dimensions has been designed for the system.