| 摘要 |
The invention relates to the cogeneration plant (50) of electrical and heat energy comprising a rotary expander (1), a steam generator (10), optionally an exchanger- overheater (10c), an electrical alternator/generator (2), an exchanger/condenser (3) and a high-pressure pump for the condensed water (5), configured so as to realize a Rankine or Rankine-Hirn thermodynamic cycle able to produce electrical and heat energy preferably for one or more dwelling units or for other users of any type. The positive-displacement rotary expander (1) comprises a housing (11, 12) provided with an internal cavity defining a toroidal cylinder (or an annular cylinder), two pairs of pistons (24-25; 34-35) rotatingly housed internally of the toroidal (or annular) cylinder, a casing (13) and a three-shaft kinetic connection housed in the casing and configured so as to operate a drive transmission from and/or towards the two pairs of pistons; the kinetic joint comprises a primary shaft (41), a first secondary shaft (21) and a second secondary shaft (31), and each secondary shaft is connected to a respective pair of pistons (24-25; 34-35); the rotation of the primary shaft at a constant velocity determines a periodical cyclic variation of the rotation velocity of the two secondary shafts. |
