Organic Rankine Cycles are a promising technology to generate power from low temperature heat sources and can therefore help to transform current energy systems into renewable ones. However, ORCs are often affected by a broad range of operating conditions; therefore detailed component models are required for the design process. This work validates a semi-empirical model of a twin-screw expander with experimental data from an Organic Rankine Cycle test rig. The results show a satisfying accuracy of the model.
Keywords Organic Rankine Cycle (ORC), twin-screw expander, modelling, experimental validation