A New Windage Loss Model for S-CO2 Turbomachinery Design

A supercritical CO2 (S-CO2) Brayton cycle is a compact and simple power conversion system with competitive efficiency. However, the strong real gas effects of S-CO2 pose challenges to design its components. In particular, designing turbomachinery for expansion compression processes has accurately reflect effects. Windage loss one major losses that affects motor load heat generation in turbomachinery. The windage substantial impact on overall efficiency especially an since reported be dominant mechanism due high fluid density rotational speed. Therefore, accurate model reflecting effect essential obtaining optimal as well maximizing performance cycle. this study, existing models are first compared recently obtained data from experiments conducted by KAIST research team under conditions order understand uncertainty caused models. This followed proposing new which explains better.