An internal combustion engine has a plurality of engine units, each having a working space, in which two rotary pistons are arranged so as mesh with each other and thereby divide the working space into an inflow region and an outflow region. Each engine unit has a closable inlet opening to the inflow region and a closable exhaust gas outlet opening. The internal combustion engine further includes a feed-line pipe to the inlet openings and an exhaust gas collection pipe connected to the exhaust gas outlet openings, so that the engine units are connected in parallel with each other. The internal combustion engine further includes exhaust gas lines which connect the engine units with each other in series. In certain cases, a control device operates some of the engine units either as internal combustion engines, or as expansion engines.

A piston-cylinder unit including a piston that is fluid pressure supported and movable in a linear manner in a cylinder, wherein the cylinder, a face wall of the piston and a face wall of the cylinder define a compression cavity which is at a minimum size in a portion of a top dead center of the piston, wherein the compression cavity is connected in a fluid transferring manner with a bearing gap which is formed between a cylinder inner circumferential wall and a piston outer circumferential wall, wherein a plurality of fluid outlet nozzles are arranged in at least one cross-sectional plane of the cylinder in the cylinder inner circumferential wall along a circumference, which fluid outlet nozzles open into the bearing gap and are connected with a supply conduit for a pressurized fluid.

The combined cycle power device of the present invention belongs to the field of energy and power technology. A combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser and an evaporator. A condenser has a liquid refrigerant pipe which passes through a pump and connects the evaporator. An evaporator connects a high-temperature heat exchanger. The high-temperature heat exchanger has a vapor channel connected a compressor. The compressor has a low-pressure vapor channel connected the evaporator. The evaporator connects the compressor and the second expander respectively. The second expander connects the condenser. The high-temperature heat exchanger connects the outside. The condenser has the cooling medium channel connected the outside. The evaporator has the heat source medium channel connected the outside. The expander and the second the expander connect the compressor and transmit power.

The combined cycle power device of the present invention belongs to the field of energy and power technology. A combined cycle power device comprises an expander, the second expander, a compressor, the third expander, a pump, a high-temperature heat exchanger, the second high-temperature heat exchanger, a condenser and an evaporator. A condenser connects a pump and an evaporator, an evaporator connects the second expander, the second expander connects the second high-temperature heat exchanger and a high-temperature heat exchanger, a compressor connects the high-temperature heat exchanger, the high-temperature heat exchanger connects an expander, the expander connects the evaporator, the third expander connects the condenser, the evaporator connects compressor and the third expander. The high-temperature heat exchanger and the second high-temperature heat exchanger have the heat source medium, the condenser has the cooling source medium. The expander, the second expander and the third expander connect the compressor and transmit power.

The combined cycle power device is provided in the present invention and belongs to the field of energy and power technology. A combined cycle power device comprising an expander, the second expander, a compressor, a pump, a high-temperature heat exchanger, a condenser and an evaporator. An evaporator connects the second expander after that a condenser passes through a pump and connects the evaporator. The second expander connects the high-temperature heat exchanger. A compressor connects the high-temperature heat exchanger. The high-temperature heat exchanger connects an expander. The evaporator connects the compressor and the condenser respectively after that the expander connects the evaporator. The high-temperature heat exchanger connects the outside. The condenser connects the outside. The evaporator connected the outside. The expander and the second expander connect the compressor and transmit power.

The combined cycle power device of the present invention belongs to the field of energy and power technology. A combined cycle power device comprises an expander, a compressor, the second expander, a pump, the second pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser and a mixed evaporator. A condenser connects a mixed evaporator. An expander connects the mixed evaporator. The mixed evaporator connects a compressor. The mixed evaporator passes through the second expander and connects the condenser. The compressor connects a high-temperature heat exchanger. A high-temperature evaporator connects the high-temperature heat exchanger after that the condenser passes through the second pump and connects the high-temperature evaporator. The high-temperature heat exchanger connects the expander. The high-temperature heat exchanger and the high-temperature evaporator have connect the outside respectively. The condenser connects the outside. The expander connects the compressor and transmits power.

The combined cycle power device is provided in the present invention and belongs to the field of energy and power technology. A combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser and an evaporator. An evaporator has a vapor channel connected with a high-temperature heat exchanger, a compressor has a vapor channel connected with the high-temperature heat exchanger, the high-temperature heat exchanger has a vapor channel connected with an expander, the evaporator has a low-pressure vapor channel connected with the compressor and the condenser respectively. The high-temperature heat exchanger has the heat source medium channel connected with the outside, the condenser has the cooling medium channel connected with the outside, the evaporator has the heat source medium channel connected with the outside, the expander connects with with the compressor and transmits power.

The combined cycle power device is provided in the present invention and belongs to the field of energy and power technology. A combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser and an evaporator. An evaporator has a vapor channel connected with a high-temperature heat exchanger, a compressor has a vapor channel connected with the high-temperature heat exchanger, the high-temperature heat exchanger has a vapor channel connected with an expander, the evaporator has a low-pressure vapor channel connected with the compressor and the condenser respectively. The high-temperature heat exchanger has the heat source medium channel connected with the outside, the condenser has the cooling medium channel connected with the outside, the evaporator has the heat source medium channel connected with the outside, the expander connects with with the compressor and transmits power.

An internal combustion engine comprises a plurality of engine units (50A-50C), each having a working space (11), in which two rotary pistons (20, 30) are arranged so as mesh with each other and thereby divide the working space (11) into an inflow region (12) and an outflow region (13). Each engine unit comprises a closable inlet opening (62A-62C) to the inflow region (12) and a closable exhaust gas outlet opening (64A-64C). The internal combustion engine further comprises a feed-line pipe (60) to the inlet openings (62A-62C) and an exhaust gas collection pipe (66) connected to the exhaust gas outlet openings (64A-64C), so that the engine units (50A-50C) are connected in parallel with each other. The internal combustion engine further comprises exhaust gas lines (63A, 63B) which connect the engine units (50A, 50B) with each other in series. In dependence upon a desired power output, a control device (70) operates some of the engine units (50B, 50C) either as internal combustion engines, wherein the respective inlet opening (62B-62C) is opened, or as expansion engines, wherein respective inlet opening (62B-62C) remains closed and the respective rotary pistons (20, 30) are instead driven by exhaust gas flowing in via the respective exhaust gas line (63A, 63B).

Systems and methods for assessing the health of a first apparatus by monitoring a second apparatus are described herein. A method for monitoring a health of a first apparatus may comprise receiving a performance parameter from a second apparatus, wherein performance of the second apparatus is dependent upon the health of the first apparatus, assessing the performance parameter, and determining the health of the first apparatus. In various embodiments, the performance parameter may comprise at least one of a speed value of the second apparatus, a position value of the second apparatus, a temperature value of the second apparatus, or a time value of the second apparatus.