A controller reduces a rotational speed of a Rankine cycle from a predetermined normal rotational speed during an operation of a compressor in a predetermined state when the controller determines that a predicted refrigerant flow quantity, which is predicted by assuming that the compressor is operated in a sole operation of the Rankine cycle at the predetermined normal rotational speed of the Rankine cycle, exceeds a predetermined flow quantity. The predetermined state is a state that satisfies a predetermined condition, which relates to the sole operation of the Rankine cycle.
A complex fluid machine (100) comprises a compressor device (110) for a refrigerating cycle (20) and an expansion device (120) for Rankine cycle (30) to collect waste heat from an engine (10) and convert into a rotational force, wherein the compressor device (110) and the expansion device (120) are arranged in a fluid machine housing (111, 101c, 121), but those devices (110, 120) are operatively independent from each other. The compressor and expansion devices (110, 120) are formed as scroll type devices, and each of the fixed scroll wraps (112b, 122b) are formed at a common base plate (101) and extend in opposite directions.
A complex fluid machine has an expansion-compressor device, a pump, and a motor generator, wherein the expansion-compressor device, the pump, and the motor generator are operatively connected and arranged in series, and a power transmitting device for disconnecting the pump from the motor generator, when the expansion-compressor device is driven by the motor generator so as to be operated as a compressor device.
A complex fluid machine has an expansion-compressor device, a pump, and a motor generator, wherein the expansion-compressor device, the pump, and the motor generator are operatively connected and arranged in series, and a power transmitting device for disconnecting the pump from the motor generator, when the expansion-compressor device is driven by the motor generator so as to be operated as a compressor device.
A check valve is provided to each discharge port, which communicates between a corresponding working chamber and a high pressure chamber in an integrated compressor/expander apparatus. A valve mechanism, which is opened in a motor mode, is provided to communicate between the working chamber and the high pressure chamber.