A linear piston engine includes a housing having a combustion chamber located between opposing first and second piston chambers. A first piston assembly is located within the first piston chamber, and a second piston assembly is located within the second piston chamber. Each piston assembly includes a piston for reciprocating within the piston chamber. The piston is located adjacent to the combustion chamber. Each piston assembly also includes a crankshaft coupled to the piston for guiding the piston through a power stroke and a return stroke, and a linear output member coupled to the piston for providing a linear output motion based on reciprocating motion of the piston.

A system includes a reciprocating expander including: a piston disposed in a chamber; a crankshaft; a connector rod coupled between the piston and the crankshaft and configured to transfer torque to the crankshaft in response to movement of the piston in the chamber; and a fluid inlet and a fluid outlet on one side of the piston. The system also includes a first flowpath coupled between a wellbore and the reciprocating expander and configured to communicate gas from the wellbore into the fluid inlet of the reciprocating expander at a first pressure. The system further includes a second flowpath coupled between the reciprocating expander and downstream equipment and configured to communicate the gas from the reciprocating expander toward the downstream equipment at a second pressure, the second pressure being lower than the first pressure.

A system includes a reciprocating expander including: a piston disposed in a chamber; a crankshaft; a connector rod coupled between the piston and the crankshaft and configured to transfer torque to the crankshaft in response to movement of the piston in the chamber; and a fluid inlet and a fluid outlet on one side of the piston. The system also includes a first flowpath coupled between a wellbore and the reciprocating expander and configured to communicate gas from the wellbore into the fluid inlet of the reciprocating expander at a first pressure. The system further includes a second flowpath coupled between the reciprocating expander and downstream equipment and configured to communicate the gas from the reciprocating expander toward the downstream equipment at a second pressure, the second pressure being lower than the first pressure.

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.

A device and method for treating a wound of a patient with negative pressure is provided. The device comprises a heat-assisted pump system. The pump system can be powered in part by heat derived from the patient. The pump system may be configured to be highly planar, light weight, and portable. The pump system may comprise a Stirling engine or a thermal acoustic engine.

A device and method for treating a wound of a patient with negative pressure is provided. The device comprises a heat-assisted pump system. The pump system can be powered in part by heat derived from the patient. The pump system may be configured to be highly planar, light weight, and portable. The pump system may comprise a Stirling engine or a thermal acoustic engine.

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, a pump, a high-temperature heat exchanger, the second high-temperature heat exchanger, a condenser and an evaporator. An evaporator connects the second expander. The condenser passes through a pump and connects the evaporator. The second expander passes through the second high-temperature heat exchanger and connects the high-temperature heat exchanger. The compressor connects the high-temperature heat exchanger. The high-temperature heat exchanger connects an expander. The evaporator connects the compressor and the condenser. The expander connects the evaporator. The high-temperature heat exchanger and the second high-temperature heat exchanger connect the outside. The condenser connects 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, the second expander, a compressor, a pump, a high-temperature heat exchanger, the second high-temperature heat exchanger, a condenser and an evaporator. An evaporator connects the second expander. The condenser passes through a pump and connects the evaporator. The second expander passes through the second high-temperature heat exchanger and connects the high-temperature heat exchanger. The compressor connects the high-temperature heat exchanger. The high-temperature heat exchanger connects an expander. The evaporator connects the compressor and the condenser. The expander connects the evaporator. The high-temperature heat exchanger and the second high-temperature heat exchanger connect the outside. The condenser connects the outside. The expander and the second expander connect the compressor and transmit power.

The combined cycle power device in the present invention belongs to the field of energy and power technology. A combined cycle power device comprising an expander, the second expander, a compressor, the third expander, a pump, a high-temperature heat exchanger, a condenser and an evaporator. An evaporator connects the second expander has a vapor channel connected the that a condenser has a liquid refrigerant pipe which 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 third expander respectively has a vapor channel connected the that the expander connects the evaporator. The third expander connects the condenser. The high-temperature heat exchanger connects the outside. The condenser has the cooling medium channel. The expander, the second expander and the third expander connects the compressor.