Research on the Mechanism of "Heterogeneousline-Mathematical Model" of ORC Vortex Expander

Firstly, the ORC organic Rankine cycle technology and the structure of the scroll expander are briefly described. Then, the geometric models of the constant cross-section (circular involute) scroll expander and the variable cross-section (circular involute-higher curve-circular involute) scroll expander are created according to the scroll profile meshing theory; and the corresponding leakage model is established. Finally, change trend of the volume of each working cavity and the length of the radial leakage line is analyzed, which lays a foundation for selecting the line structure of the scroll expander.