In order to determine parameters of the scroll expander semiempirical
model [36] used for dynamic performance investigation
of a small scale solar ORC system [37], Twomey [38] conducted
the laboratory ORC experiments by employing an automotive
scroll compressor as expander. The maximum efficiency of the
expander was 59% and the maximum output power in experiments
reached to 0.55 kW for the rotational speed varying from
479 to 1256 r/min.