Developing and testing low cost LTD Stirling engines

G. Aragón-González, M. Cano-Blanco, A. Canales-Palma, A. León-Galicia


The construction of miniature LTD Stirling engine prototypes, developed with low-cost materials and simple technologies is described. The protypes follow the Ringbom motor array, without mechanical linkages to actuate the displacer piston. Different designs, sizes, materials and mechanisms components have been tested. The power piston has been replaced with a flexible diaphragm and the mechanisms linkages were constructed with piano steel wire. Power output and efficiency experimental measurements are presented for two miniature LTD Stirling engines, the MM7 model from American Stirling Company and our simplest low cost model. A reasonable design to build low cost engines, rendering brake power and thermal efficiencies about 40 % those obtained with similar commercial engines, but only 5 % the cost has been obtained.


Stirling cycle; LTD machines; Ringbom motors; power, thermal efficiency measurement

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Revista Mexicana de Física S

 ISSN: In Process

  Non periodical electronic journal published by Sociedad Sociedad Mexicana de Física, A.C

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