Abstract
The purpose of our study is effective energy conversion from geothermal resources. But most of the geothermal resources are liquid dominated. Though the turbomachinery is not suitable for wet steam, helical screw expander is studied to apply the total flow power conversion machine. Theoretical work and efficiency were calculated using already proposed practical formula. If the operating conditions are not equal to the design conditions, the influences are greater at low dryness region. Then, it is necessary to understand the overview of the performance using practical formula before detailed design of total flow screw expander.
