The development of a small size Stirling engine as low power system for auxiliary employements aboard of sailing boats or caravan still appears interesting. In previous papers the author presented the design, the prototype construction and the experimental tests of a mono-cylinder beta-type configuration with the regenerator and part of the heat exchangers set on the displacer; the heat was irradiated by the head and it was removed by the water circulating through the rod of the displacer and around the cylinder. Considerable reductions in dead volume and global dimensions were obtained. At the same time, however, the weight of the heat exchanger regenerator displacer, mainly due to the cooler, kept the speed of revolution from increasing, with consequent limitation of specific power value; furthermore thermal insulation between hot and cold ends and displacer rod seals proved to be critical features as far as reliability is concerned. Then a new prototype has been developed adopting gamma-type configuration with stationary heat exchangers and with the displacer connecting rod linked to the crankshaft by means of an epicyclic train able to make its movement linear thus eliminating rod seal side loadings. The paper deals with the criteria followed with the design and the prototype construction, the adopted technical solutions are shown and discussed.
A new small Stirling engine prototype for auxiliary employements aboard
Prototyp eines neuen kleinen Stirlingmotors für Bordhilfseinrichtungen
1995
5 Seiten, 5 Bilder, 1 Tabelle, 7 Quellen
Aufsatz (Konferenz)
Englisch
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