OPTIMIZATION OF A MULTI-VANE EXPANDER AS THE PRIME MOVER IN AN ORGANIC RANKINE CYCLE
mover in an organic rankine cycle Extensive practical testing and computer modelling of two types of multi-vane expander has been accomplished. Conventional and lobe-type multi-vane expanders of 3-6 KW shaft power were tested using R11, steam, R113 and air as working fluids. Expander efficiencies of 65% (conventional) and 48% (lobe) have been measured. From computer simulations realistic target efficiencies of between 70-80% or better should be attainable. The major parameters affecting the performance of multi- vane expander are the mechanical efficiency and parasitic leakage coefficient. These in turn depend on various design and operating criteria which are specified in detail. Particular emphasis is laid on the need for effective internal sealing to maintain low parasitic leakage. The multi-vane expander has shown itself to be a rugged and reliable expansion device. It is flexible and versatile and with careful design and construction is capable of achieving high efficiencies. Its incorporation into Rankine-cycle driven heat pumps, waste heat generation sets and solar thermomechanical converters is both feasible and practicable.
Bibliographic Reference: EUR 8764 EN (1983) MF, 186 P., BFR 240, BLOW-UP COPY BFR 930, EUROFFICE, LUXEMBOURG, POB 1907
Availability: Can be ordered online
Record Number: 1989122011900 / Last updated on: 1987-01-01
Available languages: en