Modélisation des performances d’un moteur Ericsson à cycle de joule ouvert
Résumé
The performances of an open Joule cycle Ericsson engine associated to a biomass micro-CHP unit are
studied with a dynamic model impl
emented with the bond graph formalis
m. The dynamic phenomena of the
expansion cylinder (pressure drops across the valves, th
ermal losses through the cylinder wall, mechanical energy
exchanges through the crank and connecting rod system, m
echanical friction) are re
presented. The expansion
cycle and the indicated mean pressure
of the Ericsson engine are strongly modified when considering the
dynamic effects in the expansion cylinder, in particular
the following influent parameters: sinusoidal valve lift,
intake air temperature and pressure of the expansion
cylinder, timing of intake
and exhaust valve closing,
rotational speed, mechanical friction losses.