72 results about "Stirling engine" patented technology

The utility model relates to a periodic modification structure of a reciprocating mechanical transmission gear, which comprises a transmission gear, a non-meshing surface of the transmission gear is modified to form a meshing clearance, and the meshing surface is gapless. The gear backlash on the meshing side of the gear is eliminated to prevent the gear from being knocked in the return stroke due to the alternate change of positive and negative torque, the non-meshing side is shaped to form the backlash to prevent the interference seizure phenomenon in the gear transmission process, and the gear transmission can achieve the states of more stable operation and lower vibration noise after being changed. The transmission gear is especially suitable for transmission gears of piston connecting rod reciprocating motion machines such as Stirling engines and diesel engines.

The invention relates to the field of Stirling engines, and provides a Stirling engine oil-free lubrication cylinder sleeve and a Stirling engine, the Stirling engine oil-free lubrication cylinder sleeve comprises a cylinder sleeve body, and the inner hole wall of the cylinder sleeve body is divided into a high-speed section and low-speed sections located on the two sides of the high-speed section in the axial direction of the cylinder sleeve body; continuous net-shaped textures are arranged on the surface of the inner wall of the high-speed section, pit textures distributed in an array mode are arranged on the surface of the inner wall of the low-speed section, and the net-shaped textures and the pit textures form gradient surface textures in the axial direction of the cylinder sleeve body. The gradient surface texture is arranged on the inner surface of the cylinder sleeve according to the reciprocating speed characteristic of a piston, the high-speed section strengthens gas dynamic pressure bearing through the net-shaped texture, the low-speed section optimizes adhesion resistance and abrasive dust storage through the pit texture, the gas lubrication potential is fully released, friction reduction and service life prolonging of a dynamic sealing friction pair are achieved, and the service life is prolonged. The problems that a single surface structure of a traditional cylinder sleeve cannot be matched with the reciprocating speed difference of a piston, and the gas lubrication effect is insufficient are solved.

The invention discloses an underwater platform passive residual heat removal system and method coupled with a Stirling engine. The condenser and the shell are integrally designed in a conformal mode, a plurality of rectangular channels are evenly arranged in the circumferential direction of the shell, phase change working media of the heat pipe system are arranged in the rectangular channels, and heat dissipation and cooling are conducted on the phase change working media and seawater outside the shell; a plurality of capillary channels are evenly arranged in an inner cavity of the cooler in the annular circumferential direction, helium working media flowing in a high-frequency and high-pressure oscillation mode in the Stirling engine are arranged in the capillary channels, the outer walls of the capillary channels and the inner cavity of the cooler form a containing cavity, and the containing cavity is filled with liquid heat pipe working media. The helium working medium serves as a heat source to supply phase change of the liquid heat pipe working medium; the input end of the ascending pipe is connected to the output end of the cooler; the input end of the condenser is connected to the output end of the ascending pipe; the input end of the downcomer is connected to the output end of the condenser, and the output end is connected to the input end of the cooler; the vacuum assembly is arranged on the ascending pipe or the descending pipe.

The present invention relates to a Stirling engine and provides a composite heat source Stirling engine heat collection system, comprising a heating cavity, a heating tube cluster, a combustion heating device and a flue gas outlet, wherein the heating tube cluster is surrounded by the heating cavity arranged outside the heating cavity, the outer wall of the heating cavity is a light-transmitting layer, a solar energy concentrating heat collection device is arranged outside the light-transmitting layer to concentrate sunlight and enable it to pass through the light-transmitting layer to heat the working fluid in the heating tube cluster, the heating cavity is provided with the combustion heating device and the flue gas outlet, the heating tube cluster is formed by arranging a number of heating tubes, the working fluid inlet of the heating tube cluster is connected to a regenerator, and the working fluid outlet of the heating tube cluster is connected to an expansion chamber. The composite heat source Stirling engine heating system of the present invention can enable the Stirling engine to work all day and night, making up for the unstable and discontinuous characteristics of solar energy and improving the reliability of the Stirling engine.

The invention discloses a Stirling engine multi-component fuel high-pressure pure oxygen combustor and a combustion method thereof. The combustor comprises a combustor body, a nozzle assembly, a flame blocking ring and a heating pipe array, wherein the nozzle assembly, the flame blocking ring and the heating pipe array are integrated in the combustor body. The nozzle assembly comprises a fuel oil channel, a reformed gas channel and oxygen channels, the fuel oil channel and the reformed gas channel are coaxially arranged, the oxygen channels are laterally arranged, the fuel oil channel is arranged along the axis of the nozzle body, the reformed gas channel is of an annular structure and surrounds the peripheral side of the fuel oil channel, and the multiple oxygen channels surround the side portion of the nozzle body; the flame blocking ring is of an inverted frustum-shaped structure; the heating pipe array comprises first heating pipes and second heating pipes which are arranged in a staggered mode, the first heating pipes are located on the center side of the combustor and are of a light pipe structure, the second heating pipes are located on the inner wall side of the combustor, and fins are arranged on the outer surfaces of the second heating pipes. According to the invention, efficient mixed combustion of multi-component fuel is realized through optimization of a combustion structure, and the uniformity of a temperature field and the heat exchange efficiency are improved.

The invention belongs to the technical field of aircraft thermal management, and discloses a high-power hybrid power thermal management system. Comprising a Stirling engine, a high-temperature heat pipe loop, a medium-temperature heat source loop and a low-temperature heat source loop. The Stirling engine comprises a Stirling engine and a Stirling cryocooler which are oppositely arranged, and harmonic oscillators are adopted between the Stirling engine and the Stirling cryocooler for phase modulation. One end of the Stirling engine serves as a high-temperature end to be connected with the high-temperature heat source loop; a room temperature end between the two is connected with a medium-temperature heat source loop; a temperature difference is constructed in the Stirling engine through the high-temperature heat source loop and the medium-temperature heat source loop, external heat is absorbed through the Stirling engine to generate work, and therefore corresponding cooling capacity is generated in the low-temperature heat source loop of the Stirling cryocooler.

The invention discloses a Stirling engine pure oxygen combustion system and method, and the Stirling engine pure oxygen combustion system comprises a Stirling engine body which is used for converting heat energy into mechanical energy; the reformer is connected with the exhaust hole of the Stirling engine body through a waste heat recovery pipeline, so that diesel oil in the reformer can be subjected to steam reforming through exhaust waste heat; the metal monolithic catalytic system is a monolithic catalyst which takes FeCrAl honeycomb as a matrix and is arranged in the reformer; the direct blowing type swirl nozzle is connected with the Stirling engine body and the reformer and is used for mixing and combusting diesel oil, reformed gas and pure oxygen; and the ejector is connected with the Stirling engine body and the direct blowing type swirl nozzle and is used for adjusting the flue gas recirculation proportion. According to the system, through the coupling design of fuel reforming and pure oxygen combustion, deep utilization of exhaust waste heat is achieved, and the combustion efficiency and the efficiency of an external combustion system are improved.

The application provides a Stirling heat engine and heat pump system, and the Stirling heat engine at least comprises: a shell provided with a containing cavity; a first heat exchanger arranged in a first end of the containing cavity; a second heat exchanger arranged in a second end of the containing cavity; a regenerator arranged in the containing cavity and located between the first heat exchanger and the second heat exchanger; a first piston arranged in the first end and located on a side of the first heat exchanger away from the regenerator, the first piston is sealingly arranged with an inner side wall of the first end, and a first compression cavity is formed between the first piston and the first heat exchanger; wherein the first piston is provided with a first buffer cavity, and a ventilation mechanism is arranged on a side of the first piston facing the first heat exchanger and communicated with the first buffer cavity and the first compression cavity respectively, and the ventilation mechanism and the first buffer cavity are used for adjusting the air pressure in the first compression cavity. In this way, the heat pumping efficiency and energy efficiency of the Stirling heat engine can be improved.

The invention discloses a data center heat dissipation device based on a Stirling engine. The data center heat dissipation device comprises an immersed cooling box, the Stirling engine, a generator, a storage battery, a refrigeration engine and a refrigeration mechanism. A steam flowing area is arranged at the upper part in the immersed cooling box; the Stirling engine comprises an air cylinder and a connecting rod set. An in-cylinder piston capable of conducting piston motion is arranged in the air cylinder and divides the interior of the air cylinder into a hot cavity and a cold cavity, and the hot cavity is in heat exchange contact with the steam flowing area. The power input part of the connecting rod group is in transmission connection with the in-cylinder piston, and the power output part of the connecting rod group is in transmission connection with the power input part of the generator; the electric energy output end of the generator is electrically connected with the electric energy input end of the storage battery; the refrigeration engine is used for driving the piston in the cylinder to do piston motion; the refrigerating mechanism is used for conveying cooling liquid to circularly flow in the hot cavity and the cold cavity respectively; after the scheme is adopted, the PUE can be reduced, and the heat exchange capability of the system can be enhanced at the same time.

The invention discloses an integrated Stirling engine heat regenerator-cooler assembly. A shell-and-tube cooler of the heat regenerator-cooler assembly comprises a cooler structural part and a cooler heat exchange tube bundle which are fixedly connected. The side wall of the cooler structural part is sleeved with multiple layers of cooler heat exchange tube bundles which are distributed in the circumferential direction. The metal wire mesh sintering type filter pad, the metal wire mesh sintering type heat regenerator and the cooler structural member are all of circular ring structures; the metal wire mesh sintering type heat regenerator and the cooler structural part are coaxially arranged, and the metal wire mesh sintering type heat regenerator is fixedly installed between the cooler structural part and the heat regenerator outer cylinder body. And wire mesh sintering type filter pads are fixedly mounted on the two end surfaces of the wire mesh sintering type heat regenerator. The heat regenerator-cooler assembly can effectively reduce the flow loss of a working medium and achieve efficient heat exchange, so that efficient work of the Stirling engine is guaranteed.

The invention relates to the technical field of 3D printing, and provides a Stirling type liquid cooling FDM 3D printing spray head device and a 3D printer, and the spray head device comprises a wire feeding assembly, an energy conversion assembly, a heating assembly and a hot melting spray head; the heating assembly is provided with a first wire channel, and the heating assembly is used for heating a printing wire passing through the first wire channel to be in a molten state; the hot melting nozzle is mounted at an outlet of the first wire channel, and the printing wire heated to be in a molten state is extruded out of the hot melting nozzle; the energy conversion assembly is configured to be used for collecting heat of the heating assembly and converting the collected heat into mechanical energy so as to drive the wire feeding assembly. According to the FDM 3D printing nozzle device, the wire feeding assembly, the energy conversion assembly, the heating assembly and the hot melting nozzle jointly form an energy conversion device similar to a Stirling engine, heat is converted into mechanical energy, the wire feeding, wire melting and printing functions of the FDM 3D printing nozzle device are achieved, a motor and a power supply module do not need to be configured, and the manufacturing cost is reduced. Effects of efficient liquid cooling, energy recycling and weight reduction are achieved.

The invention discloses a surface texturing piston ring based on a gas lubrication Stirling engine and a manufacturing method, the piston ring is made of a filled polytetrafluoroethylene material, and circular pit textures which are uniformly distributed are arranged on the sealing surface, used for forming dynamic sealing with a cylinder sleeve, of the piston ring; the radius of the circular pit texture ranges from 100 micrometers to 300 micrometers, the area occupancy of the circular pit texture on the sealing surface ranges from 10% to 40%, and the depth-diameter ratio ranges from 0.001 to 0.01. According to the method, by optimizing the geometrical parameters and the distribution form of the surface texture, enhancing the gas dynamic pressure bearing capacity and improving the piston ring-cylinder sleeve mixed lubrication condition, the problem that the piston ring is rapidly abraded and fails under the oil-free lubrication working condition is solved, the abrasion rate is reduced, the service life of a sealing piece is prolonged, and the reliability and the operation stability of the Stirling engine are improved.

Provided is a free-piston Stirling engine that can be easily manufactured by reducing manufacturing processes. A free-piston Stirling refrigerator comprises: a piston capable of reciprocating inside a first cylinder; a first leaf spring for controlling the reciprocating motion of the piston; a connection body for connecting the piston to the movable portion of the first leaf spring; a support arm portion for supporting the fixation portion of the first leaf spring in a state where the positional relation with the first cylinder is fixed; a washer for adjusting the movable mass mp of a piston assembly; and an attachment portion that is disposed on the connection body 13 and to which the washer is attached, and the attachment portion is disposed in such position as to enable the washer to be attached while the piston assembly is assembled, thereby reducing disassembly and reassembly processes and allowing easy manufacturing.

The invention discloses an opposed fin heater applied to a Stirling engine. The heater comprises a heat exchange sleeve, heat exchange fins, a pressure-bearing shell, a plurality of multifunctional adjusting blocks, a shell temperature measurement fixing column, an inner cavity temperature measurement fixing column, a column section flange and an adjusting inner core. According to the heater, opposed interfaces of the two Stirling engines are provided by adopting the symmetrically-arranged column section flanges, the two Stirling engines share a hot end working cavity, axial vibration is mutually counteracted when the two engines work at the same time, and a single-machine vibration acceleration signal can be reduced by 50%; heat generated by an external heat source is transmitted to the internal working medium through the heat exchange sleeve and the heat exchange fins in sequence; the multifunctional adjusting block can adjust the weight, the internal volume and the heat capacity of the heater by selecting different materials and structures, and therefore adjustment of parameters such as the weight, the gravity center and the thermal inertia of the heater is achieved.

A kind of heat storage energy power generation system, including heat storage device and stirling engine, the main shaft transmission output of stirling engine is connected generator, and intelligent general control system is associated with control above-mentioned each device, several parallel power shafts are arranged in stirling engine, and one power cylinder is connected at the both ends of each power shaft, power shaft is driven connection main shaft by respective corresponding crank mechanism, two power cylinders on the same power shaft are respectively connected with the both ends of corresponding heating cylinder by gas pipeline, and the inner chamber of heating cylinder is divided into two variable chambers by moving partition and constitutes gas alternate reciprocating mechanism, and each heating cylinder is heated by heat storage device.The utility model has the advantages of reasonable structure, power cylinder is connected at the both ends of power shaft, action stroke is not idle, and the efficiency of work is high, the working phase of crank mechanism of different power shafts can be staggered, to ensure that main shaft has no dead point, and rotation output is more stable and continuous.The number of power cylinder can be adjusted conveniently by intelligent control work, and output power generation power is adjusted.

The application discloses a Stirling refrigeration engine system and a heat exchange system thereof, which comprises a Stirling engine body, wherein the Stirling engine body comprises a refrigeration head, the refrigeration head comprises a plurality of refrigeration components, the refrigeration components comprise a cover body one, a cover body two and a plurality of refrigeration capillary tubes, the cover body one is connected with a hot cylinder of the Stirling engine body, the cover body two is connected with a cold cylinder of the Stirling engine body, and the two ends of the refrigeration capillary tubes are connected between the cover body one and the cover body two respectively, the Stirling refrigeration engine system further comprises a rotary driver, a rotary output shaft of the rotary driver is connected with a rotating shaft of the Stirling engine body, and the rotary driver is used for driving the Stirling engine body to work, and the refrigeration capillary tubes can be cooled and refrigerated. The Stirling engine body can be driven to generate a Stirling cooling cycle by the electric rotary driver, working gas forms a Stirling refrigeration cycle in the Stirling engine body, and high-speed refrigeration is achieved by using the working gas to form a closed cycle to do work.

The application provides a high-temperature heat exchanger for a Stirling engine and the Stirling engine, the high-temperature heat exchanger comprises a cylindrical shell, a circular ring fin group and a plurality of heat pipes, the circular ring fin group is arranged on the inner side of the cylindrical shell and the axes coincide, the plurality of heat pipes are embedded and penetrate through the cylindrical shell and the circular ring fin group along the direction perpendicular to the axis of the cylindrical shell, and the plurality of heat pipes are arranged in parallel with each other. The application realizes increasing the number of the arranged heat pipes, and further increases the contact area of the heat pipes and the circular ring fin group, reduces the circumferential temperature difference in the circular ring fin, enhances the overall heat exchange performance of the high-temperature heat exchanger, and improves the engine efficiency.

The present application relates to power generation system technical field, provide a kind of distributed stirling power generation system, it includes: heat pipe stack, heat conducting piece, generator and multiple stirling engines;The heat pipe stack is equipped with multiple heat pipes, multiple the high temperature end heat exchanger of multiple stirling engines is connected to the heat conducting piece respectively, so that the heat of the heat pipe can be conducted to the high temperature end heat exchanger by the heat conducting piece;The generator is equipped with compression cavity, and the air chamber of each stirling engine is communicated with the compression cavity of the generator.This distributed stirling power generation system multiple stirling engines are connected with heat pipe through heat conducting piece, increase the system heat exchange area, reduce heat loss, improve the thermoelectric conversion efficiency of power generation system.And the redundancy of this system is high, and the processing and manufacturing difficulty is low.

Conventional Stirling engines have the following drawbacks: • The two working gases that exchange heat with each other do not reach the heat exchanger at the same time. The pressure, volume, temperature, and entropy of the working gas change continuously. [Solution] A combination of a cylinder and a piston creates a first heating chamber, a second heating chamber, a first cooling chamber, and a second cooling chamber. The first heating chamber and the second cooling chamber are small for the same volume. The second heating chamber and the first cooling chamber are large for the same volume. Each cylinder is connected by a vent pipe with a check valve. The vent pipes connecting the second heating chamber and the first cooling chamber, and the vent pipes connecting the third cooling chamber and the first heating chamber, are passed through the heat exchanger. The pistons and crankshafts are connected such that when the volumes of the first heating chamber and the first cooling chamber are at their minimum, the volumes of the second heating chamber and the second cooling chamber are maximized. The first and second heating chambers are heated with a high-temperature heat source, and the first and second cooling chambers are cooled with a low-temperature heat source.

The application relates to the technical field of free piston Stirling generators, and provides a free piston Stirling power generation system with built-in air compression devices, which comprises a heat source, a Stirling generator, air compression devices and a helium heat transfer pipeline. The helium heat transfer pipeline sequentially passes through the heat source and the Stirling generator, so that heat transfer gas in the helium heat transfer pipeline is heated by the heat source and then supplied to the Stirling generator to generate heat and power. The air compression devices are arranged in the expansion cavity of the Stirling generator, and the kinetic energy of a phase adjuster in the Stirling generator is used to provide air compression driving force, so that the structure of the Stirling power generation system is simplified, and the air compression devices do not need to rely on other additional driving components. The helium heat transfer pipeline adopts a gas medium, high-pressure gas generated by the helium heat transfer pipeline is directly coupled with the heat source for heat exchange, and the corrosion of other heat transfer mediums (for example, molten salt, liquid metal and the like) to the heat head structure does not need to be considered. The free piston Stirling power generation system has the advantages of simple and compact structure, wide heat source adaptability and high thermoelectric efficiency.

This application relates to the field of Stirling engine cooling technology, specifically to a Stirling engine cooler based on a printed circuit board. The cooler includes: a cooler housing comprising an outer tube, an inner tube, and a slot; the cooler housing is secured to the outer wall of the engine via the slot; air guide plates and heat dissipation plates are fitted onto the outer wall of the inner tube, with multiple air guide plates and heat dissipation plates arranged alternately; a water inlet and a water outlet, one end of which is connected to the internal space of the heat dissipation plate; a first airflow groove and a second airflow groove are provided on the surface of both the air guide plates and the heat dissipation plate. Through the above structural design, this application improves the compactness of the engine cooler, cools the helium gas emitted by the engine through the alternating arrangement of air guide plates and heat dissipation plates, resulting in a larger heat exchange area and higher heat exchange efficiency.

The utility model relates to the technical field of Stirling engine model measurement, in particular to a device for measuring the power of a Stirling engine model and a control system, comprising a support mechanism, a conversion mechanism, an adjusting mechanism and an electronic scale, the control system comprises two groups of direct-current power supplies, a heating end temperature control unit, a cooling end temperature control unit and an electrodynamic torque meter circuit unit; the Stirling engine model and the testing device are combined and assembled, so that the power efficiency can be conveniently and accurately measured; through cooperation of the Stirling engine model and the control system, the cold and heat source temperature can be conveniently and accurately controlled, and meanwhile the problem that the Stirling engine model is overheated after running for a long time is solved.

This application discloses an ultra-compact counter-flow microchannel cooler for Stirling engines, comprising a cooling shell and a cooling core. The cooling core includes multiple heat dissipation plates and multiple air guide plates. Both the heat dissipation plates and air guide plates are hollow tubular structures. The heat dissipation plates and air guide plates are alternately stacked in the radial direction. The heat dissipation plates have cooling channels in the axial direction, and the air guide plates have air guide channels in the axial direction. Hot fluid and cold fluid exchange heat in the multiple air guide plates and heat dissipation plates. This application solves the technical problem that traditional shell-and-tube coolers cannot be used for high-heat-load heat exchange within a confined annular space. Through the alternating stacking design of the air guide plates and heat dissipation plates in the heat exchange core, the heat exchange area per unit volume can be significantly increased, the compactness of the cooler structure can be improved, and the heat exchange power can be increased.

The present application relates to the field of energy conversion, and provides a Stirling engine, which comprises an energy conversion device and a linear motor, the energy conversion device is arranged to form an axial temperature gradient, the energy conversion device is provided with a buffer tube, one end of the buffer tube is communicated with an expansion cavity in the energy conversion device, the expansion cavity is located at one end of the energy conversion device away from the linear motor, and the buffer tube extends along the axial direction of the energy conversion device; the linear motor comprises a piston, a phase adjuster and a cylinder body, the piston can reciprocate in a second cavity of the cylinder body, the piston is slidingly and sealingly connected with the buffer tube, the phase adjuster is located at the other end of the buffer tube, the phase adjuster is slidingly and sealingly connected with the piston, a first cavity is formed between the phase adjuster, the piston and the buffer tube, and the first cavity is communicated with the expansion cavity through the buffer tube. The Stirling engine provided by the present application sets the buffer tube in the engine, and installs the phase adjuster in the linear motor, so that the phase adjuster is away from the energy conversion device, and the influence of high-temperature or low-temperature environment on the phase adjuster is reduced.

The invention discloses a metal monolithic catalyst for fuel reforming of a Stirling engine and a preparation method of the metal monolithic catalyst. The method comprises the following steps: performing in-situ oxidation on a FeCrAl honeycomb metal matrix at 950 DEG C to form an Al2O3 nano whisker layer with the diameter of 2-5 microns and the length of 10-20 microns; coating gamma-Al2O3 support slurry on the porous support layer in a dip-coating manner to form a porous support layer; alternately dipping in a cerium nitrate solution and a zirconium nitrate solution, and roasting to construct a Ce0. 75Zr0. 25O2 porous functional layer; and a high-dispersion noble metal active layer is loaded according to the molar ratio of Pt to Rh being 1: 1. The obtained catalyst has high interface bonding strength, high specific surface area and excellent mass and heat transfer performance, can realize high diesel conversion rate and high hydrogen selectivity under the working condition of high-temperature and high-pressure reforming, and shows good carbon deposition resistance and stable operation capability.

The present application relates to heat exchange device technical field, provide a kind of heat transfer device and stirling engine, wherein, heat transfer device is used to transfer heat to the heat end heat exchanger of stirling engine, heat transfer device includes the shell for containing condensing medium;Shell includes evaporation part, condensing part and transition part, condensing part is used to be covered in the outside of heat end heat exchanger, evaporation part is located below condensing part and evaporation part is communicated with the lower end of condensing part, so that the liquid condensing medium of condensing part flows to evaporation part under the action of gravity, the first end of transition part is communicated with condensing part, second end is communicated with evaporation part, the cross-sectional area of the first end of transition part is greater than the cross-sectional area of the second end of transition part.Such setting, directly make the condensing part of heat transfer device cover on heat end heat exchanger, can guarantee the heat exchange efficiency between heat transfer device and heat end heat exchanger;Avoid the setting of red copper block, it is favorable to reduce quality, and then can solve the problem of heavy of high-power stirling engine.

The utility model discloses a Fresnel-Stirling solar power conversion system with a low gravity center, which realizes environment-friendly and sustainable energy conversion by combining a Fresnel lens and a Stirling engine. In the system, sunlight collected by the Fresnel lens is used as a heat source, and ambient air is used as a cold source, namely, the Fresnel lens concentrates the sunlight to the heat source part of the Stirling engine, so that the working gas is heated to expand and pushes the piston to do work, then the cold source cools the working gas, the working gas is shrunk, and the piston returns, the process is repeated, and the working gas is heated to expand and push the piston to do work. Therefore, continuous power is generated. A user can control the host to drive the stepping motor to rotate the lens, so that the lens is always aligned with the sun as time goes on, the influence caused by rotation of the earth is counteracted, and more solar energy is utilized as much as possible. The system is opposite to a traditional scheme, the Stirling engine is located below the collecting lens, the gravity center of the whole system is lowered, and the system is more stable.

The present invention relates to a heat engine comprising at least one Stirling engine for converting thermal energy into mechanical energy or vice versa, and at least one power output. The Stirling engine has at least one displacer cylinder with a displacer piston and at least one working cylinder with a working piston. The displacer piston is connected to the power output via a displacer-piston-side transmission line, and the working piston is connected to the power output via a working-piston-side transmission line.

An interior space climate control system featuring a temperature differential engine, with the temperature differential engine configured to exploit the temperature differential of at least two sources with different temperatures. The fluids may be used to provide additional benefits to an interior space, such as heating, hot water, cooling, and refrigeration, and unused climate control fluids may in turn be used as sources of fluids with temperature differentials.

The invention provides a free piston thermoacoustic Stirling air floatation piston structure which comprises an air cylinder internally provided with a mounting cavity. The phase modulator, the power piston and the gas spring piston are all arranged in the mounting cavity, one side of the phase modulator is connected with a Rod rod, and the Rod rod penetrates through the power piston and is connected with the gas spring piston; air gaps are reserved between the gas spring piston and the inner wall of the air cylinder, between the power piston and the inner wall of the air cylinder and between the phase modulator and the inner wall of the air cylinder; a compression cavity is formed between the phase modulator and the power piston; the air supply pipeline is distributed on the inner wall of the air cylinder and corresponds to the axial positions of the phase modulator, the power piston and the gas spring piston, and one end of the air supply pipeline is communicated with the air gap; the other end of the air supply pipeline is communicated with the high-pressure air cavity; and high-pressure gas in the high-pressure gas cavity enters the air gap to form a high-pressure gas film. The gas spring piston, the power piston and the phase modulator are supported, gas floating supporting points are moved to the two sides from the center, and the torque resistance is improved.