An expander of the piston (2) and cylinder (3) type is inverted from normal orientation, with the crankshaft (4) upper most and the cylinder head (5) lower most. The cylinder head has a pair of liquid injectors (6, 7) oriented for respective liquids pentane and glycerine to be injected as mists into contact with each other at the bottom of the cylinder. The pentane is vaporised by transfer of latent heat to it from the glycerine. Respective injector valves (9, 10) from high pressure rails (11, 12) fed by pumps (14, 15) are provided. An exhaust valve (16) is opened by a cam (17) driven at crankshaft speed by a chain drive.

An expander of the piston (2) and cylinder (3) type is inverted from normal orientation, with the crankshaft (4) upper most and the cylinder head (5) lower most. The cylinder head has a pair of liquid injectors (6, 7) oriented for respective liquids pentane and glycerine to be injected as mists into contact with each other at the bottom of the cylinder. The pentane is vaporised by transfer of latent heat to it from the glycerine. Respective injector valves (9, 10) from high pressure rails (11, 12) fed by pumps (14, 15) are provided. An exhaust valve (16) is opened by a cam (17) driven at crankshaft speed by a chain drive.

Provided is a power generation system with which it is possible to perform efficient power generation. The power generation system comprises: an evaporation chamber; a reciprocal heat-insulating cylinder provided with a forward-side expansion chamber and a backward-side expansion chamber; an operating fluid supply/ejection means which performs a supply flow passageway forming operation and an ejection flow passageway forming operation in an alternating and reciprocal manner; a heat-insulating expansion chamber; a liquefied operating fluid recirculating means; and a compression/liquefaction recirculating means. The heat-insulating expansion chamber may be provided separately on both the ejection flow passage downstream side of the forward-side expansion chamber and on the ejection flow passage downstream side of the backward-side expansion chamber.

Provided is a power generation system with which it is possible to perform efficient power generation. The power generation system comprises: an evaporation chamber; a reciprocal heat-insulating cylinder provided with a forward-side expansion chamber and a backward-side expansion chamber; an operating fluid supply/ejection means which performs a supply flow passageway forming operation and an ejection flow passageway forming operation in an alternating and reciprocal manner; a heat-insulating expansion chamber; a liquefied operating fluid recirculating means; and a compression/liquefaction recirculating means. The heat-insulating expansion chamber may be provided separately on both the ejection flow passage downstream side of the forward-side expansion chamber and on the ejection flow passage downstream side of the backward-side expansion chamber.

Disclosed is a paired compress gas energy power system and power method. The paired compress gas energy power system includes: a paired compress gas energy storage device having a high pressure air container and a low pressure air container, the high pressure air container is filled with a high pressure gas, the low pressure air container is filled with a low pressure gas; a paired compress gas energy engine, respectively connected to the low pressure air container and the high pressure air container; and a power device connected to the rotary shaft of the paired compress gas energy engine, the power device is driven by the paired compress gas energy engine. The invention converts the paired compress gas energy into the mechanical torque energy through the paired compress gas energy engine to drive the power device to work, or to drive the generator to generate electric energy.

Disclosed is a paired compress gas energy power system and power method. The paired compress gas energy power system includes: a paired compress gas energy storage device having a high pressure air container and a low pressure air container, the high pressure air container is filled with a high pressure gas, the low pressure air container is filled with a low pressure gas; a paired compress gas energy engine, respectively connected to the low pressure air container and the high pressure air container; and a power device connected to the rotary shaft of the paired compress gas energy engine, the power device is driven by the paired compress gas energy engine. The invention converts the paired compress gas energy into the mechanical torque energy through the paired compress gas energy engine to drive the power device to work, or to drive the generator to generate electric energy.

Provided is a power generation system with which it is possible to perform efficient power generation. The power generation system comprises: an evaporation chamber; a reciprocal heat-insulating cylinder provided with a forward-side expansion chamber and a backward-side expansion chamber; an operating fluid supply/ejection means which performs a supply flow passageway forming operation and an ejection flow passageway forming operation in an alternating and reciprocal manner; a heat-insulating expansion chamber; a liquefied operating fluid recirculating means; and a compression/liquefaction recirculating means. The heat-insulating expansion chamber may be provided separately on both the ejection flow passage downstream side of the forward-side expansion chamber and on the ejection flow passage downstream side of the backward-side expansion chamber.

Provided is a power generation system with which it is possible to perform efficient power generation. The power generation system comprises: an evaporation chamber; a reciprocal heat-insulating cylinder provided with a forward-side expansion chamber and a backward-side expansion chamber; an operating fluid supply/ejection means which performs a supply flow passageway forming operation and an ejection flow passageway forming operation in an alternating and reciprocal manner; a heat-insulating expansion chamber; a liquefied operating fluid recirculating means; and a compression/liquefaction recirculating means. The heat-insulating expansion chamber may be provided separately on both the ejection flow passage downstream side of the forward-side expansion chamber and on the ejection flow passage downstream side of the backward-side expansion chamber.

An engine apparatus including at least four piston assemblies is provided. Each piston assembly includes a piston attached to a connection member at a first end and a second end. Each piston of the piston assembly defines a first chamber and a second chamber separated by the piston. The first chamber and the second chamber are each defined at the first end and at the second end. Each first chamber of one piston assembly is fluidly connected to the second chamber at a different piston assembly. At least one first chamber at the first end is fluidly connected to a respective second chamber at the second end. At least one first chamber at the second end is fluidly connected to a respective second chamber at the first end. At least one first chamber at one end is fluidly connected to a respective second chamber at the same end.

A near-adiabatic engine has four stages in a cycle: a means of near adiabatically expanding the working fluid during the downstroke (expansion stroke); a means of cooling the working fluid at Bottom Dead Center (BDC); a means of near adiabatically compressing that cooled fluid from the lower pressure/temperature level at BDC to the higher level at Top Dead Center (TDC); and finally, a means of passing that working fluid back into the high pressure/temperature source in a balanced condition with minimal resistance to that flow.