Revolving vane expander having delivery conduit arranged to control working fluid flow

A revolving vane expander comprising:

• a cylinder rotatable about an axis;
• a rotor housed within the cylinder to establish a working chamber between the rotor and the radially inner surface of the cylinder, the working chamber operative to receive and expand a working fluid, the rotor being eccentrically mounted relative to the cylinder;
• a vane secured to one of the cylinder or the rotor, the vane slidably receivable within a slot established in the other of the cylinder or the rotor, the vane configured to link rotational movement of the cylinder and the rotor;
• and
• a delivery conduit arranged to control flow of the working fluid, the delivery conduit having a opening, wherein rotating the rotor moves the opening between a first position and a second position, the first position permitting more of the working fluid to flow through the conduit than the second position.