Abstract: An artificial muscle device includes a plurality of intermuscular boards and a plurality of artificial muscles disposed between the intermuscular boards in an alternating pattern and communicatively coupled to a controller. Each of the one or more artificial muscles includes a housing comprising an electrode region and an expandable fluid region, a dielectric fluid housed within the housing, and an electrode pair positioned in the electrode region of the housing, the electrode pair including a first electrode and a second electrode. The electrode pair is actuatable between a non-actuated state and an actuated state such that actuation from the non-actuated state to the actuated state directs the dielectric fluid into the expandable fluid region, expanding the expandable fluid region, thereby applying pressure to the intermuscular boards.

Abstract: A method for controlling a dual fuel engine system includes determining a gas flow target for an internal combustion engine of the dual fuel engine system, where the gas flow target is based on a gas power target of the internal combustion engine, a thermal efficiency estimate of the internal combustion engine, and a lower heating value (LHV) within the internal combustion engine. The method also includes adjusting the gas flow target based on at least one of a measured gas temperature or a measured gas injector pressure and determining at least one base gas injector command based on the adjusted gas flow target, a gas substitution rate estimate, and a gas substitution rate target. The method further includes determining, based on the at least one base gas injector command, a gas injector command for at least one engine bank.

Abstract: An artificial muscle device includes a plurality of intermuscular boards and a plurality of artificial muscles disposed between the intermuscular boards in an alternating pattern and communicatively coupled to a controller. Each of the one or more artificial muscles includes a housing comprising an electrode region and an expandable fluid region, a dielectric fluid housed within the housing, and an electrode pair positioned in the electrode region of the housing, the electrode pair including a first electrode and a second electrode. The electrode pair is actuatable between a non-actuated state and an actuated state such that actuation from the non-actuated state to the actuated state directs the dielectric fluid into the expandable fluid region, expanding the expandable fluid region, thereby applying pressure to the intermuscular boards.

Abstract: Systems, methods and devices for optimizing heat transfer within a device or system used to compress and/or expand a gas, such as air, are described herein. In some embodiments, a compressed air device and/or system can include an actuator such as a hydraulic actuator that can be used to compress a gas within a pressure vessel. An actuator can be actuated to move a liquid into a pressure vessel such that the liquid compresses gas within the pressure vessel. In such a compressor/expander device or system, during the compression and/or expansion process, heat can be transferred to the liquid used to compress the air. The compressor/expander device or system can include a liquid purge system that can be used to remove at least a portion of the liquid to which the heat energy has been transferred such that the liquid can be cooled and then recycled within the system.

Abstract: Systems and methods for operating a hydraulically actuated device/system are described herein. For example, systems and methods for the compression and/or expansion of gas can include at least one pressure vessel defining an interior region for retaining at least one of a volume of liquid or a volume of gas and an actuator coupled to and in fluid communication with the pressure vessel. The actuator can have a first mode of operation in which a volume of liquid disposed within the pressure vessel is moved to compress and move gas out of the pressure vessel. The actuator can have a second mode of operation in which a volume of liquid disposed within the pressure vessel is moved by an expanding gas entering the pressure vessel. The system can further include a heat transfer device configured to transfer heat to or from the at least one of a volume of liquid or a volume of gas retained by the pressure vessel.

Abstract: A nanofuel engine including receiving nanofuel (including moderator, nanoscale molecular dimensions & molecular mixture) internally in an internal combustion engine that releases nuclear energy, is set forth. A nanofuel chemical composition of fissile fuel, passive agent, and moderator. A method of obtaining transuranic elements for nanofuel including: receiving spent nuclear fuel (SNF); separating elements from SNF, including a stream of elements with Z>92, fissile fuel, passive agent, fertile fuel, or fission products; and providing elements. A method of using transuranic elements to create nanofuel, including: receiving, converting, and mixing the transuranic elements with a moderator to obtain nanofuel. A method of operating a nanofuel engine loaded with nanofuel in spark or compression ignition mode.

Abstract: Systems and methods for operating a hydraulically actuated device/system are described herein. For example, systems and methods for the compression and/or expansion of gas can include at least one pressure vessel defining an interior region for retaining at least one of a volume of liquid or a volume of gas and an actuator coupled to and in fluid communication with the pressure vessel. The actuator can have a first mode of operation in which a volume of liquid disposed within the pressure vessel is moved to compress and move gas out of the pressure vessel. The actuator can have a second mode of operation in which a volume of liquid disposed within the pressure vessel is moved by an expanding gas entering the pressure vessel. The system can further include a heat transfer device configured to transfer heat to or from the at least one of a volume of liquid or a volume of gas retained by the pressure vessel.

Abstract: Systems, methods and devices for optimizing heat transfer within a device or system used to compress and/or expand a gas, such as air, are described herein. In some embodiments, a compressed air device and/or system can include an actuator such as a hydraulic actuator that can be used to compress a gas within a pressure vessel. An actuator can be actuated to move a liquid into a pressure vessel such that the liquid compresses gas within the pressure vessel. In such a compressor/expander device or system, during the compression and/or expansion process, heat can be transferred to the liquid used to compress the air. The compressor/expander device or system can include a liquid purge system that can be used to remove at least a portion of the liquid to which the heat energy has been transferred such that the liquid can be cooled and then recycled within the system.

Abstract: In various embodiments, foam is compressed to store energy and/or expanded to recover energy.

Abstract: A displacer for adjusting a level of a liquid cryogen in a cryostat. The displacer including an expandable member at least partially defining a sealed chamber. The expandable member being configured to transition from a collapsed state where the sealed chamber has a smaller volume to an expanded state where the sealed chamber has a larger volume. The displacer includes a first end piece attached to a first end of the expandable member and a second end piece attached to a second end of the expandable member.

Abstract: In various embodiments, compressed-gas energy storage and recovery systems include a cylinder assembly for compression and/or expansion of gas, a reservoir for storage and/or supply of compressed gas, and a system for thermally conditioning gas within the reservoir.

Abstract: In various embodiments, a mechanical assembly and/or storage vessel is fluidly coupled to a circulation apparatus for receiving pressurized heat-transfer fluid from an outlet at a first elevated pressure, boosting a pressure of the heat-transfer fluid to a second pressure larger than the first pressure, and returning heat-transfer fluid to an inlet at a third pressure.

Abstract: Heat engine with at least two cylinder-piston units, each containing an expansion fluid, which stands under a prestressing pressure and which changes its volume in the case of a change of temperature and thus moves the piston, elements for the individually controllable supply of heat to the expansion fluid of each cylinder-piston unit, and a control means controlling the heat supply elements to allow each expansion fluid to alternately heat up and cool down and thus move the pistons, wherein a common prestressing fluid acts on the pistons of all cylinder-piston units in order to exert a common prestressing pressure on the expansion fluids, the control means is fitted with a pressure gauge for the prestressing pressure, and the control means controls the heating and cooling phases of the heat supply elements in dependence on the measured prestressing pressure in order to hold the prestressing pressure within a predetermined range.

Abstract: Systems, methods and devices for optimizing heat transfer within a device or system used to compress and/or expand a gas, such as air, are described herein. For example, systems, methods and devices for optimizing the heat transfer within an air compression and expansion energy storage system are described herein. A compressor and/or expander device can include one or more of various embodiments of a heat transfer element that can be disposed within an interior of a cylinder or pressure vessel used in the compression and/or expansion of a gas, such as air. Such devices can include hydraulic and/or pneumatic actuators to move a fluid (e.g., liquid or gas) within the cylinder or pressure vessel. The heat transfer element can be used to remove heat energy generated during a compression and/or expansion process.

Abstract: Systems, methods and devices for optimizing heat transfer within a device or system used to compress and/or expand a gas, such as air, are described herein. In some embodiments, a compressed air device and/or system can include an actuator such as a hydraulic actuator that can be used to compress a gas within a pressure vessel. An actuator can be actuated to move a liquid into a pressure vessel such that the liquid compresses gas within the pressure vessel. In such a compressor/expander device or system, during the compression and/or expansion process, heat can be transferred to the liquid used to compress the air. The compressor/expander device or system can include a liquid purge system that can be used to remove at least a portion of the liquid to which the heat energy has been transferred such that the liquid can be cooled and then recycled within the system.

Abstract: In various embodiments, foam is compressed to store energy and/or expanded to recover energy.

Abstract: In various embodiments, gas is compressed to store energy and/or expanded to recover energy to or from high pressures, and the gas is exchanges heat with a heat-exchange fluid that is thermally conditioned at low pressures.

Abstract: In various embodiments, efficiency of energy storage and recovery systems compressing and expanding gas is improved via heat exchange between the gas and a heat-transfer fluid.

Abstract: Apparatus (100) comprising a power plant or air motor utilizing compressed air or liquid air for energy storage. The apparatus includes an electrical plant (200), a mechanical plant (300), and a pneumatic plant (400). When operating as a compressor, the plant receives electrical and/or direct mechanical power as an input to drive the plant, compress air, and store its output in the form of compressed or liquefied air. When operating as an engine, the plant consumes the compressed or liquid air to drive a mechanism of the engine and deliver mechanical power and/or electrical power as an output.

Abstract: Embodiments relate generally to energy storage systems, and in particular to energy storage systems using compressed gas as an energy storage medium. In various embodiments, a compressed gas storage system may include a plurality of stages to convert energy into compressed gas for storage, and then to recover that stored energy by gas expansion. In certain embodiments, a stage may comprise a reversible compressor/expander having a reciprocating piston. Pump designs for introducing liquid for heat exchange with the gas, are described. Gas flow valves featuring shroud and/or curtain portions, are also described.

Abstract: The invention relates to a method for producing superheated steam in an engine in which highly compressed water is injected into a very hot medium located in the engine, resulting in explosion-like evaporation. Said process is to take place in a specially developed rotational-translational engine in order to utilize a maximum of the thrust of the steam. The engine is to comprise at least two cylinders which have a circular cross-sectional shape (10) and inside which the drive shaft (11) is disposed eccentrically. A rotor (12) that is connected to an element (16) which is inserted through the drive shaft (11) is arranged on the drive shaft. Said element (16) can be moved back and forth in the drive shaft (11) while the ends thereof are fixedly anchored to the rotor (12). The two ends of the rotor (10) are provided with a specially designed triple-roll seal (13) that can lengthen and shorten the rotor (10), which is a requirement when the drive shaft (11) is placed non-axially in a circular cylinder (10).

Abstract: To improve the separation efficiency of a gas-liquid separator in the gas-liquid separator and an air conditioner, the gas-liquid separator having a vessel with an inlet pipe and an outlet pipe is arranged such that an exit end section of the inlet pipe is formed to be closed or to have a gap, an expanded end section having a width greater than the diameter of that portion of the inlet pipe which crosses a container of the gas-liquid separator is provided, and that a lateral hole is formed in a side face of the expanded end section. Refrigerant vapor and refrigerant liquid are efficiently separated from each other at the expanded end section, and this improves separation efficiency of the gas-liquid separator.

Abstract: Systems and methods for operating a hydraulically actuated device/system are described herein. For example, systems and methods for the compression and/or expansion of gas can include at least one pressure vessel defining an interior region for retaining at least one of a volume of liquid or a volume of gas and an actuator coupled to and in fluid communication with the pressure vessel. The actuator can have a first mode of operation in which a volume of liquid disposed within the pressure vessel is moved to compress and move gas out of the pressure vessel. The actuator can have a second mode of operation in which a volume of liquid disposed within the pressure vessel is moved by an expanding gas entering the pressure vessel. The system can further include a heat transfer device configured to transfer heat to or from the at least one of a volume of liquid or a volume of gas retained by the pressure vessel.

Abstract: In various embodiments, a mechanical assembly and/or storage vessel is fluidly coupled to a circulation apparatus for receiving pressurized heat-transfer fluid from an outlet at a first elevated pressure, boosting a pressure of the heat-transfer fluid to a second pressure larger than the first pressure, and returning heat-transfer fluid to an inlet at a third pressure.

Abstract: Method of conversion of heat into fluid power includes pumping of the working liquid into a hydropneumatic accumulator with gas compression, subsequent gas expansion with displacement of the working liquid from the other accumulator as well as supply of heat to the gas by transferring the gas through the hotter heat exchanger and removal of heat from the gas by transferring the gas through another, colder heat exchanger performed so that the average temperature of the gas during expansion is higher than that during compression, wherein the gas is transferred between different accumulators through said heat exchangers. The device for conversion of heat into fluid power includes at least two accumulators, the means for liquid supply and intake as well as the means for heating and cooling containing at least two flow-type gas heat exchangers installed with the possibility of gas transfer through them between gas reservoirs of different accumulators.

Abstract: In various embodiments, efficiency of energy storage and recovery systems compressing and expanding gas is improved via heat exchange between the gas and a heat-transfer fluid.

Abstract: An electrical generator converts the high blast pressures of explosives into useful electricity by capturing the explosive gases and using the high gas pressures to alternately push water hydraulically between two tanks and through water turbines connected to DC electric generators. Water expelled through a water turbine from one tank is used to fill the other tank. Batteries can be used to store the electrical energy generated, and inverters followed by transformers convert the DC electric from the turbine-generators to 110-VAC, 220-VAC, and 440-VAC. A microcomputer controller connected to various sensors and solenoid valves coordinates the timing and routing of the detonation of explosives, tank pressures, venting, valving, and load control.

Abstract: An engine and a method for operating the engine comprising a chamber defined by at least one fixed wall and at least one movable wall, the volume of the chamber variable with movement of the movable wall; an injector arranged to inject liquid into the chamber while the chamber has a substantially minimum volume; apparatus through which energy is introduced that is absorbed by the fluid which then explosively vaporizes, performing work on the movable wall; and apparatus which returns the movable wall to a position prior to the work being performed thereon so the chamber has the substantially minimum volume, substantially evacuating the chamber of vaporized fluid without substantially compressing the vaporized fluid.

Abstract: The invention relates to a piston steam engine having flash vaporization. Said inventive piston steam engine can be operated with various working mediums and at different temperatures. The liquid working medium is successively injected into individual prechambers of the vapor machine cylinder. The inlet temperature of said working medium is adapted to the expansion step in the working cycle of the machine in relation to the respective point in time of injection.

Abstract: Systems, methods and devices for optimizing heat transfer within a device or system used to compress and/or expand a gas, such as air, are described herein. For example, systems, methods and devices for optimizing the heat transfer within an air compression and expansion energy storage system are described herein. A compressor and/or expander device can include one or more of various embodiments of a heat transfer element that can be disposed within an interior of a cylinder or pressure vessel used in the compression and/or expansion of a gas, such as air. Such devices can include hydraulic and/or pneumatic actuators to move a fluid (e.g., liquid or gas) within the cylinder or pressure vessel. The heat transfer element can be used to remove heat energy generated during a compression and/or expansion process.

Abstract: A steam engine has a pipe shaped fluid container, a heating and cooling devices respectively provided at a heating and cooling portions of the fluid container, and an output device connected to the fluid container, so that the output device is operated by the fluid pressure change in the fluid container, to generate an electric power. In such a steam engine, an inner radius “r1” of the cooling portion is made to almost equal to a depth “?1” of the thermal penetration, which is calculated by the following formula (1); ? 1 = 2 ? a 1 ? ( 1 ) wherein, “a1” is a heat diffusivity of the working fluid at its low pressure, and “?” is an angular frequency of the movement of the working fluid.

Abstract: A system for producing energy includes a solvent chamber, a pressure chamber and a semi-permeable barrier separating the solvent chamber from the pressure chamber. The solvent chamber holds a solvent, and the pressure chamber hold a solute solution comprising a solute dissolved in a solvent. The semi-permeable barrier is permeable to solvent molecules and impermeable to solute molecules. Solvent molecules effuse across the semi-permeable barrier into the solute solution of the closed pressure chamber to increase the pressure of the pressure chamber, thereby generating energy in the form of hydrostatic pressure. A conversion device may convert the increased pressure in the pressure chamber to energy. The solute solution may be expelled and recycled after use.

Abstract: A system and method for providing a rotational output using a non-combustion heat source. The system may include a sealed chamber and a triggering element. The sealed chamber may contain a substance that expands when heated and contracts when cooled. The sealed chamber may include a displacer capable of moving within the sealed chamber, wherein the displacer moves when the substance is heated and a heat source situated within the sealed chamber. The heat source heats the substance when activated. The triggering element is coupled to the sealed chamber and activates the heat source. The system may include mechanisms for translating the displacer movement into a rotational output or other output.

Abstract: The present invention relates generally to micro heat engines (MHEs) and methods of manufacture. More particularly, the present invention relates to an MHE including a substrate having a sealed microchannel for operatively containing a liquid droplet within the microchannel and a thermal bridge for providing a heat source or heat sink to the microchannel. The MHE also includes a piezoelectric sensor responsive to a pressure change within the microchannel to induce voltage across the piezoelectric sensor and a power output.

Abstract: An air cycle refrigerating/cooling system includes a first heat exchanger for cooling air, a turbine unit that has a compressor for compressing the air and an expansion turbine for adiabatically expanding the air, and a second heat exchanger for cooling the air. A compressor rotor of the compressor and a turbine rotor of the expansion turbine are attached to a common main shaft in the turbine unit in such a manner that the turbine unit drives the compressor rotor with a power generated by the turbine rotor, and the main shaft is rotatably supported by a rolling contact bearing. A part or the entirety of a thrust force applied to the main shaft is supported by an electromagnet, and a pressure equalizing device for equalizing a gas pressure at opposite ends of the rolling contact bearing is provided.

Abstract: The invention relates to a piston steam engine having flash vapourisation. Said inventive piston steam engine can be operated with various working mediums and at different temperatures. The liquid working medium is successively injected into individual prechambers of the vapour machine cylinder.

Abstract: The concentricity and coaxiality of a central bore through a piston for a free piston Stirling machine is improved with a piston that has a sleeve with a core constructed from at least two, separate, axially-engaging core components sealed within the sleeve. During fabrication, a central bore is machined through each of the core components. The piston is assembled by heating the sleeve and cooling the core components, inserting the core components into the sleeve and then allowing the sleeve to cool and the core components to warm. This drives the core components into sealed engagement with each other and with the sleeve and aligns the central bore coaxially with the outer cylindrical surface of the sleeve.

Abstract: A steam engine has a pipe shaped fluid container, a heating and cooling devices respectively provided at a heating and cooling portions of the fluid container, and an output device connected to the fluid container, so that the output device is operated by the fluid pressure change in the fluid container, to generate an electric power. In such a steam engine, the fluid pressure in the fluid container is adjusted such that the fluid pressure does not exceed a saturated vapor pressure at the operating temperature. As a result, unnecessary condensation and liquefaction of the steam due to the increased pressure higher than the saturated vapor pressure can be prevented, to improve performance of the steam engine.

Abstract: This invention provides a heat engine based on the well-developed structure of internal combustion engines. The heat engine comprises at least a piston and cylinder assembly and at least two heating chambers associated with said piston and cylinder assembly to provide a significantly increased time period for heat transfer from a heat source to the gaseous working of the engine without increasing the number of strokes per power stroke in a cycle. Each said heating chamber has therewithin a heat exchanger unit that facilitates heat transfer from the heating source to the working fluid, such as air, substantially under a constant volume, a port leading to said cylinder space, and a heating-chamber valve, said valve opening or closing the port to establish or block communication between said heating chamber and cylinder space.

Abstract: There is provided a micro power generator enhanced in efficiency and power generation output, and having an increased temperature range for operation. The micro power generator comprises: a high-temperature heat source; a low-temperature heat source; an enclosed body containing a working substance therein, the enclosed body being deformable by means of a phase change of the working substance between a first shape wherein heat can be transferred from the high-temperature heat source and a second shape wherein heat can be transferred to the low-temperature heat source; a permanent magnet constituting the enclosed body, the permanent magnet being maintained in a first position when the enclosed body has the first shape and in a second position when the enclosed body has the second shape; and a wire in which an electric current is induced by a movement of the permanent magnet.

Abstract: The internal pressure p1 of the hollow body of a pneumatic structural element that comprises a hollow body (1), at least two traction elements (4) and at least one compression member (2) can be electrothermally varied by means of a fluid. The hollow body (1) houses a void (12) which is filled with a gas (15), and a container (9) which contains a volatile liquid (10). Said liquid (10) can be heated or cooled by means of a heat pump (13). Said heat pump (13) thermally contacts the liquid (10) via lamellas (24). A pressure sensor (14) measures the pressure inside the void (12). A cable (16) links the sensor (14) and the heat pump (13) with control and regulating electronics (23).

Abstract: A steam engine has a looped fluid container, in which working fluid is filled. A heating device, a cooling device and an output device are arranged at the fluid container. A lower side valve is provided at a fluid passage of the fluid container between the heating device and the output device. An upper side valve is provided at another fluid passage of the fluid container between the cooling device and the output device. The upper and lower valves are respectively controlled to open and close the respective fluid passages at proper timings, to increase heat efficiency.

Abstract: Internal explosion engine and generator having an explosion chamber, a movable member forming one wall of the chamber, a charge of non-combustible gas sealed inside the chamber, means for repeatedly igniting the gas in an explosive manner to drive the movable member from a position of minimum volume to a position of maximum volume, means for returning the movable member from the position of maximum volume to the position of minimum volume, and means coupled to the movable member for providing electrical energy in response to explosion of the gas. In one disclosed embodiment, the movable member is a piston connected to a crankshaft, and it is returned to the position of minimum volume by a flywheel on the crankshaft. In another, two pistons are connected back-to-back in a hermetically sealed chamber to prevent loss of the explosive gas.

Abstract: The engine for converting thermal energy to stored fluid energy includes expansion cylinders (61a–f) with expansion chambers (62a–f) and flexible membranes (63a–f). Heating and cooling of working fluid inside the cylinders (61a–f) is carried out by fluid supply lines (73, 71) communicating with external heat resources and sinks. Pressure accumulator (66a) is adapted to store a pressurised fluid (64a–f), such as hydraulic oil, from the individual cylinders (61a–f). In use, this pressurised fluid is delivered at an elevated and above a minimum threshold pressure level, irrespective of the irregularities of the movement of the expansion cylinders (61a–f).

Abstract: A heat engine, preferably combined with an electric generator, and advantageously implemented using micro-electromechanical system (MEMS) technologies as an array of one or more individual heat engine/generators. The heat engine is based on a closed chamber containing a motive medium, preferably a gas; means for alternately enabling and disabling transfer of thermal energy from a heat source to the motive medium; and at least one movable side of the chamber that moves in response to thermally-induced expansion and contraction of the motive medium, thereby converting thermal energy to oscillating movement. The electrical generator is combined with the heat engine to utilize movement of the movable side to convert mechanical work to electrical energy, preferably using electrostatic interaction in a generator capacitor.

Abstract: Internal explosion engine and generator having an explosion chamber, a movable member forming one wall of the chamber, a charge of non-combustible gas sealed inside the chamber, means for repeatedly igniting the gas in an explosive manner to drive the movable member from a position of minimum volume to a position of maximum volume, means for returning the movable member from the position of maximum volume to the position of minimum volume, and means coupled to the movable member for providing electrical energy in response to explosion of the gas. In one disclosed embodiment, the movable member is a piston connected to a crankshaft, and it is returned to the position of minimum volume by a flywheel on the crankshaft. In another, two pistons are connected back-to-back in a hermetically sealed chamber to prevent loss of the explosive gas.

Abstract: The invention concerns a device forming a mechanism, in particular for use in the space sector, characterised in that it comprises in combination: a material (300) with low melting point capable of producing a soldering joint, at least heating means (400), a structure having an architecture with a zone blocked by the low melting point material (300), capable of being released by liquefying the low melting point material, and means for forced rolling of the low melting point metal (300) in liquid state, after the heating means (400) have been activated, to produce a shock absorbing function.

Abstract: A combustion-driven hydroelectric generating system has one or more combustion cylinders that contain a liquid (such as water) and receive a combustible fuel/oxidizer mixture that is ignited and the explosive force of the combustion acts on the surface of the liquid to transfer a metered slug of the liquid to a pressurized vessel containing a pressurized gas (preferably an inert gas). The pressurized liquid from the pressurized vessel serves as a “head of water” that can be used to operate a water wheel (Pelton wheel) or hydroelectric generator and perform other useful work. The transferred liquid is replaced in the combustion cylinders, another charge of the fuel/oxidizer is introduced and ignited and the process is repeated.

Abstract: A thermodynamic cycle consisting of six events repeated continuously. Event 1 is adiabatic compression of a carrier gas to raise its temperature. Event 2 is liquid Injection into the hot carrier gas near the end of event 1. Event 3 is temperature equalization between the carrier gas and injected liquid with the liquid's full or partial vaporization. Event 4 is adiabatic expansion of the mixture. Event 5 exhausts the mixture. Exhaust should be captured to save and separate the mixture into its components to increase efficiency, however, this cycle may be either an open or closed cycle. Event 6 is the induction a new charge of carrier gas, which brings the cycle back to the initial conditions of event one. This cyclical sequence of six events numbered from any starting point will be referred to as the RAKH CYCLE. Engines using it are RAKH engines. Refrigeration machines using it are RAKH refrigerators.

Abstract: A micromachined fluid handling device having improved properties. The valve is made of reinforced parylene. A heater heats a fluid to expand the fluid. The heater is formed on unsupported silicon nitride to reduce the power. The device can be used to form a valve or a pump. Another embodiment forms a composite silicone/parylene membrane. Another feature uses a valve seat that has concentric grooves for better sealing operation.