36results about "Heater tubes" patented technology

A burner for an external combustion engine using liquid or gaseous fuel, the burner being arranged for heat exchange between the inlet air to the burner and the exhaust air from the burner. The burner includes an external housing, a shroud within this housing, which shroud forms part of the centrally positioned combustion chamber. The burner includes air inlet apparatus and guide apparatus for guiding the inlet air to the combustion chamber, an igniter and fuel inlet apparatus and gas exhaust apparatus. The external housing, an element of the inlet apparatus, the guide apparatus, and heat exchange elements are formed as inverted shaped dishes or shells about the combustion chamber.

The invention provides an apparatus for generating heat and transferring the heat to a heater head of an external combustion engine, preferably, a Stirling engine. Fuel and air are introduced into a combustion chamber and mixed to form an air/fuel mixture. The air/fuel mixture is combusted over a combustion catalyst positioned in physical contact with a heat spreader, which itself is positioned in physical contact with a heat acceptor surface. The heat acceptor surface is secured in thermal communication with the heater head. Depending upon the design of the heater head, heat flux from the heat acceptor surface into the heater head may occur radially or non-radially.

A thermodynamic machine includes at least one chamber in which an isothermal expansion and/or compression is to be carried out, said chamber being longitudinally defined by first and second walls that are mobile relative to each other. The chamber is divided by partitions extending longitudinally from each of the first and second walls, the partitions being interleaved within each other, and the distance between the partitions extending from a same wall being such that the ratio between the distance squared and the cycle duration of the thermodynamic machine is lower than the average thermal diffusivity of the gas contained in the chamber.

A Stirling engine with internal regenerator and integral geometry for heat transfer and fluid flow has a displacer piston with a plurality of cavities traversing through the displacer piston and arranged in a specific cross sectional geometry. A heater head has heater fin protrusions that are arranged in the specific geometry, and a cooling bridge has cooler fin protrusions that are in the specific geometry. The displacer piston alternates between the heater head and the cooling bridge, with the cavities of the piston alternately enveloping the heater protrusions and the cooling protrusions, providing more efficient heat transfer to and from the working fluid. Each cavity in the displacer also contains a regenerator core, further improving heat transfer efficiency. The heater fin protrusions may also contain thermally conductive cores. A bellows assembly may also be used to seal the displacer piston from the heater head in order to reduce unswept volume.

A system for electricity generation using heat contained in exhaust gas from a combustor (enclosed flare) to drive an external combustion Stirling cycle engine which directly drives at least one alternator or generator. A battery is connected to the alternator or generator through a divider circuit followed by a filter circuit. Electric power distribution circuits are electrically connected to output circuits of the alternators or generators for consumption of the electric power on-site, for sale to a commercial electric power distribution grid, or for any other desired uses.

A heat exchanger assembly for transferring heat across a wall of a housing is disclosed. The assembly comprises an outer heat exchanger having an outer ring disposed outside the housing and having an interior surface in contact with an exterior surface of the wall; an inner support disposed inside the housing and having an exterior surface; and a plurality of inner heat fins connecting the exterior surface of the inner support to an interior surface of the wall of the housing.

A radiation thermal absorber based on characteristic absorption spectrum, a Stirling engine and an operation method thereof. The radiation thermal absorber allows working gas in the Stirling engine to absorb radiation heat quickly, and help the Stirling engine adopt assistant heating to ensure steady operation when solar power is not enough. The radiation thermal absorber includes a heater base, a radiation energy conversion device, heating tubes, a combustion chamber and valves of the heating tubes. The radiation energy conversion device converts the solar energy into radiation energy near a characteristic absorption peak of the working gas, and the working gas absorbs the radiation directly in depth.

The invention relates to the technical field of engines, in particular to a free piston Stirling engine. The free piston Stirling engine comprises two Stirling mechanisms which are oppositely arranged, a heat source is arranged between the two Stirling mechanisms; each Stirling mechanism comprises a shell and a heat pipe type heater; a communicating pipeline is connected between the two Stirling mechanisms; the communicating pipeline communicates with two expansion cavities or two compression cavities or two back cavities, the heat pipe type heater comprises a heater body and a plurality of heat pipes, the condensation ends of the heat pipes are correspondingly arranged in heat pipe embedding holes, and the evaporation ends of the heat pipes penetrate through the shell to be connected withthe heat source. The free piston Stirling engine is compact in structure, vibration of the engine is reduced, each Stirling mechanism adopts a heat pipe type heater to achieve heat transmission, heatloss in energy transmission is effectively reduced, and the working efficiency of the engine is improved.

Coil solar receiver for a Stirling disk, the main components of which are pipes (where the sun hits), collectors, tanks and cupolas (of which there are two types, one that houses the regenerator, and the expansion cupola that is the area where the working gas is at a higher temperature) that includes a series of pipes (1) that perpendicularly exit from one collector (2) and perpendicularly enter another (2) and where each pipe consists of two semicircumferential curved parts (10) and three straight parts (11) parallel to one another: a center straight part (between curve and curve) and two straight parts on the ends (between the curve and the exit of one collector (2)), the two straight end parts being located on the same plane, while the center straight part is located in a separate plane.

An aspect of the present disclosure is directed to a system for energy conversion. The system includes a closed cycle engine containing a volume of working fluid. The engine includes an expansion chamber and a compression chamber each separated by a piston attached to a connection member of a piston assembly. The engine further includes a plurality of heater conduits extended from the expansion chamber. The engine includes a plurality of chiller conduits extended from the compression chamber. The expansion chamber and heater conduits are fluidly connected to the compression chamber and chiller conduits via a walled conduit.

The invention discloses a self-adaption device and method applied to Stirling engine heating pipe overtemperature. The self-adaption device and the method applied to Stirling engine heating pipe overtemperature comprises a plurality of memory alloys; each memory alloy is arranged on the inner wall of a heating pipe; when the temperature in the heating pipe is lower than the temperature threshold of the memory alloys, each memory alloy is attached to the inner wall of the heating pipe; when the temperature in the heating pipe exceeds the temperature threshold of the memory alloys, each memory alloy is bent in the radial direction of the heating pipe; and when the shapes of the memory alloys change and bend and when a gas working medium with the same mass flow rate flows, the bent memory alloys enhance disturbance of airflow, the convective heat transfer coefficient is improved, convection heat exchange between the gas working medium and the heating pipe is enhanced, and the purpose of reducing the temperature of the heating pipe is achieved. The self-adaption device and method applied to Stirling engine heating pipe overtemperature adopt enhanced heat exchange, the waste of energy is avoided, the operation of a generation set is not paused, the operation is more stable, the cooling of the heating pipe is realized, meanwhile, the solar energy can be effectively utilized, the power generation can also not be interrupted, and the stability of power output is guaranteed.

A tubular reactor which acts as a combustor and heat exchanger is disclosed. Such reactor supplants a system with a combustor having a heat exchanger arranged around the combustor. The combined system includes a diffuser having an inlet for a fuel-and-air mixture and a plurality of holes defined in its surface through which the fuel-and-air mixture exits the diffuser and a plurality of tubes. First linear portions along the length of each tube are mutually parallel with a centerline of the first portions of the tubes displaced from the diffuser by a predetermined distance. Centerlines of the linear portions of adjacent tubes are displaced from each other by a predetermined gap. The fuel and air combust in the proximity of the first portion of the tubes for effective heat transfer to gases traveling through the tubes. Such a tubular reactor can be employed within a thermal-compression heat pump.