SET Proceedings 2978-4387 Caravel Press 10.65582/set.2010.035 2010.035 Numerical Investigation of an Ejector with Transcritical CO2 as Working Fluid ZhuYinhai Yinhai.zhu@mail.tsinghua.edu.cn JiangPeixue jiangpx@mail.tsinghua.edu.cn Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing, China 24082010 9 978-1-995850-04-7 1 7 24 August 2010 © 2010 Copyright WSSET 2010

The transcritical CO2 ejector is modelled and analyzed based on the Computational Fluid Dynamics (CFD) technique. The real gas properties of CO2 such as density, specific heat, enthalpy, entropy, viscosity and sound speed are considered in the study. The ejector performance is investigated by varying the two key geometries: nozzle exit position (NXP) and diameter ratio (αD). The flow characteristic and the shock wave pattern are analyzed by the detailed flow field in the ejector.

 CO2 refrigeration cycle ejector real gas CFD modelling 24 to 27 August 2010 9th International Conference on Sustainable Energy Technologies SET2010 9 Shanghai, China