CN115163327A - Device for improving heat exchange effect of external heat source of Stirling engine - Google Patents
Device for improving heat exchange effect of external heat source of Stirling engine Download PDFInfo
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- CN115163327A CN115163327A CN202210686180.8A CN202210686180A CN115163327A CN 115163327 A CN115163327 A CN 115163327A CN 202210686180 A CN202210686180 A CN 202210686180A CN 115163327 A CN115163327 A CN 115163327A
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- flue gas
- heat exchange
- spoiler
- heating chamber
- stirling engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
- F02G1/055—Heaters or coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2255/00—Heater tubes
- F02G2255/20—Heater fins
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a Stirling engine and discloses a device for improving the heat exchange effect of an external heat source of the Stirling engine, which comprises a heating chamber (2), a heat exchange tube (5) and a flue gas spoiler (4), wherein the heat exchange tube (5) and the flue gas spoiler (4) are arranged in the heating chamber (2), a plurality of mounting holes matched with the caliber of the heat exchange tube (5) are formed in the flue gas spoiler (4), and the heat exchange tube (5) penetrates through the mounting holes to be connected with the flue gas spoiler (4). According to the invention, the flue gas spoiler is arranged in the heating chamber, the mounting hole is formed on the flue gas spoiler, the heat exchange tubes are distributed in the mounting hole, and the flow direction of the high-temperature flue gas introduced into the heating chamber is changed by the flue gas spoiler, so that the flow path of the high-temperature flue gas in the heating chamber is prolonged, the disturbance to the high-temperature flue gas is enhanced, the flow time of the high-temperature flue gas in the heating chamber is prolonged, the heat released by the high-temperature flue gas can be more fully absorbed by the working medium in the heat exchange tubes, and the heat exchange effect is enhanced.
Description
Technical Field
The invention relates to a Stirling engine, in particular to a device for improving the heat exchange effect of an external heat source of the Stirling engine.
Background
The Stirling engine is an external combustion engine, can utilize various types of external heat sources, has low requirement on the quality of fuel, has low emission of complete combustion pollutants, simple structure, few parts and high theoretical efficiency, can be automatically started, has quiet and stable running process, and has been successfully applied to the fields of spaceflight, automobiles, ships and the like. In the operation process of the Stirling engine, the working medium continuously absorbs heat to expand and cools to contract to realize continuous work, wherein the temperature difference between the heat source and the hot end working medium is far larger than that between the cold source and the cold end working medium, so that the heat exchange capacity of the heater has important influence on the actual efficiency of the Stirling engine. The high-temperature flue gas generated by fuel combustion is a heating heat source commonly adopted by the Stirling engine, if the heat exchange between the flue gas and the working medium in the heater can be enhanced, the irreversible loss in the heat transfer process is reduced, the average temperature of the working medium at the hot end is increased, the actual working efficiency of the Stirling engine can be effectively increased, the competitive advantage of the Stirling engine in the market is improved, and the application field of the Stirling engine is enlarged.
The heat exchange capacity between an external heat source and an internal working medium of the Stirling engine is enhanced, and the heat exchange quantity and the volume of the heating cavity are considered at the same time. At present, heaters of Stirling engines are mainly divided into fin type heaters and tube type heaters, wherein the fin type heaters are simple in structure, required heating cavities are small in size, heat exchange amount is small, dust is easy to accumulate, and the fin type heaters are suitable for Stirling engines with smaller power. Compared with a fin type heater, the tubular heater has large heat exchange capacity and wider application. However, the tubular heater generally needs a larger heating cavity volume, increases the heat dissipation area of a heat source, and affects the energy utilization efficiency and the compactness of the stirling engine, and for the above problems, chinese patent CN201711437650.2 is an arrangement structure and an installation method of a heater for a stirling engine, CN201580033078.6 radiant heat recovery type heater, and a stirling engine and an incinerator using the radiant heat recovery type heater, and CN201920014888.2 stirling engine heat exchangers and the like which use the radiant heat recovery type heater adopt a tube cluster heater with a heat exchange tube bent back and a plurality of tubes regularly arranged, and the specific arrangement mode is as follows: the heat regenerator is connected to single heat exchange tube one end, and the expansion chamber is connected to the other end, and the middle inflection is crooked, and the shape is similar to the U type, and many U type heat exchange tubes that the geometric dimension is the same are arranged into ring shape or rectangle annular tube cluster in heating chamber circumference, and this kind of mode helps the heat regenerator to arrange in expansion chamber week side to reduce the volume in heating chamber by a wide margin, improved the compactedness of engine, reduced the area of engine.
For the Stirling engine taking high-temperature flue gas generated by combustion as an external heat source, although the U-shaped tube cluster type heater can greatly reduce the volume of a heating cavity on the premise of keeping the volume of a working medium side unchanged, the flue gas circulation path in the heating cavity is shortened by nearly half, the residence time of the high-temperature flue gas in the heating cavity is short, insufficient heat exchange between the flue gas and the working medium in a heat exchange tube is easily caused, the heat efficiency of the Stirling engine is influenced, the problem is relieved by prolonging the length of the heat exchange tube, the useless volume of the Stirling engine can be increased, and the output power of the working medium per unit mass is influenced. Therefore, a method for strengthening heat exchange capacity of an external heat source of the Stirling engine is needed, and the heat exchange capacity of high-temperature flue gas and working media in the pipe is effectively improved on the premise of not increasing the volume of a heating cavity and the useless volume of the engine.
For an external heating system of a stirling engine, chinese patent CN201811226590.4 discloses a method for increasing a convective heat transfer area by installing fins on the outer side of each heat exchange tube, and documents also propose that a flue gas flow director is added on the outer ring side of each heat exchange tube of a U-shaped heat exchange tube cluster to perform enhanced heat transfer, but the method can only perform enhanced heat transfer by small-amplitude disturbance flue gas, and cannot greatly increase the heat exchange effect of the flue gas with a working medium in a heating cavity.
Disclosure of Invention
The invention aims to provide a device for improving the heat exchange effect of an external heat source of a Stirling engine, which can improve the heat exchange effect of smoke in a heating cavity and working media in a heat exchange tube on the premise of not increasing the volume and the volume of the engine.
In order to solve the technical problem, the invention provides a device for improving the heat exchange effect of an external heat source of a Stirling engine, which comprises a heating chamber, a heat exchange tube and a flue gas spoiler, wherein the heat exchange tube and the flue gas spoiler are arranged in the heating chamber, the flue gas spoiler is provided with a plurality of mounting holes matched with the caliber of the heat exchange tube, and the heat exchange tube penetrates through the mounting holes to be connected with the flue gas spoiler.
Preferably, the smoke spoiler is provided in a spiral shape.
Preferably, the smoke spoiler is arranged in a single spiral structure. Through above-mentioned preferred technical scheme, set up the flue gas spoiler into single helical structure to can increase the disturbance to the high temperature flue gas through changing the flow path of high temperature flue gas in the heating chamber, thereby improve the heat transfer effect between high temperature flue gas and the interior working medium of heat transfer pipe.
Further preferably, a plurality of the flue gas spoilers are arranged in the heating chamber, and the flue gas spoilers are arranged in the axial direction of the heating chamber at equal intervals.
Further preferably, the smoke spoiler is arranged into a double-spiral structure. Through this preferred technical scheme, adopt helical structure's flue gas spoiler, can change high temperature flue gas into along the vortex route double helix flow of flue gas spoiler by the vertical flow in the heat transfer cavity, strengthened the heat transfer effect between high temperature flue gas and the interior working medium of heat exchange tube.
Preferably, the smoke spoiler is provided in a multi-spiral structure. Through this preferred technical scheme, change the flow direction of high temperature flue gas into many spirals and flow, strengthened the heat transfer effect of high temperature flue gas to working medium in the heat transfer pipe.
Further preferably, the heat exchange tubes are provided with U-shaped heat exchange tubes, the lengths of the U-shaped heat exchange tubes are equal, the U-shaped heat exchange tubes penetrate through the flue gas spoiler to form a circular tube cluster, and the center of the circular tube cluster coincides with the center of the heating chamber.
Preferably, the heating chamber comprises a plurality of flue gas inlets and flue gas outlets, the flue gas inlets are arranged on the side edge of the lower portion of the heating chamber at equal intervals, the flue gas outlets are arranged on the upper end face of the heating chamber, and the opposite connecting line of the flue gas outlets penetrates through the center of the end face of the heating chamber.
Further preferably, the inner wall of the heating chamber is further provided with a limiting groove, and the flue gas spoiler is clamped with the limiting groove so as to be fixed.
Preferably, the flue gas spoiler conforms to the shape of the inner wall of the heating chamber.
According to the technical scheme, the device for improving the heat exchange effect of the external heat source of the Stirling engine is characterized in that the smoke spoiler is arranged in the heating chamber, the smoke spoiler is provided with the mounting hole, the mounting hole is internally provided with the plurality of heat exchange tubes, and each heat exchange tube is clamped with the mounting hole so as to fix the heat exchange tube. The flue gas spoiler changes the flow direction of the high temperature flue gas that lets in the heating chamber, has prolonged the flow path of high temperature flue gas in the heating chamber, has increased the disturbance to the high temperature flue gas to improved the heat transfer time of high temperature flue gas in the heating chamber with the intraductal working medium of heat transfer, make the heat of the release of absorption high temperature flue gas that the working medium in the heat transfer pipe can be more abundant, strengthened the heat transfer effect.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
FIG. 1 is a schematic view of the external structure of a Stirling engine heating chamber of the present invention;
FIG. 2 is a schematic view of the internal structure of the single-spiral flue gas spoiler and the heating chamber of the present invention;
FIG. 3 is a schematic view of the spiral groove of the heating chamber and the smoke spoiler at the position I in FIG. 2 according to the present invention;
FIG. 4a is a schematic structural view of a single-spiral flue gas spoiler and a heat exchange tube bundle of the present invention;
FIG. 4b is a schematic structural view of a single-spiral flue gas spoiler of the present invention;
FIG. 5a is a schematic structural view of a double-helix flue gas spoiler and a heat exchange tube bundle of the present invention;
FIG. 5b is a schematic structural view of the double spiral flue gas spoiler of the present invention;
FIG. 6a is a schematic structural view of a multi-spiral flue gas spoiler and a heat exchange tube bundle of the present invention;
FIG. 6b is a schematic structural view of the multi-spiral flue gas spoiler of the present invention.
Reference numerals
1. Flue gas outlet 2 heating chamber
3. Flue gas inlet 4 flue gas spoiler
5. 6 working medium outlets of heat exchange tubes
7. Working medium inlet of expansion cavity 8
9. High-temperature flue gas 10 working medium
Detailed Description
The following describes in detail embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, and for example, the term "connected" may be a fixed connection, a detachable connection, or an integral connection; either directly or indirectly through intervening media, either internally or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
An embodiment of the device for improving the heat exchange effect of the external heat source of the stirling engine of the invention, as shown in fig. 1 to 3, comprises a heating chamber 2, a heat exchange pipe 5 and a flue gas spoiler 4, wherein the heating chamber 2 can be cylindrical, rectangular, truncated cone-shaped, etc., and the flue gas spoiler 4 is provided in a corresponding shape according to the shape of the heating chamber 2, although only the heating chamber 2 and the flue gas spoiler 4 in the three shapes are described in the embodiment, in the actual production, the shapes of the heating chamber 2 and the flue gas spoiler 4 are not limited to the three cases, and can be provided in other shapes. The heat exchange tube 5 and the flue gas spoiler 4 are arranged in the heating chamber 2, a plurality of mounting holes matched with the caliber of the heat exchange tube 5 are formed in the flue gas spoiler 4, and the heat exchange tube 5 penetrates through the mounting holes to be clamped with the flue gas spoiler 4. After the flue gas spoiler 4 and the heat exchange tube 5 are installed, the useless volume of the hot end of the Stirling engine cannot be increased, the volume of a flue gas heating cavity of the Stirling engine cannot be changed, namely, on the premise of not influencing the compactness of the internal structure of the Stirling engine, the flow path of flue gas in the heating cavity 2 is changed through the flue gas spoiler 4, high-temperature flue gas 9 introduced into the heating cavity 2 advances along the direction of the flue gas spoiler 4, the movement direction of the high-temperature flue gas 9 is limited, heat exchange can be generated between the high-temperature flue gas 9 and the heat exchange tube 5 within the heating cavity 2 for a longer time, sufficient heat exchange between the high-temperature flue gas 9 and a working medium 10 introduced into the heat exchange tube 5 is realized, and the heat exchange efficiency is improved.
Some embodiments of the device for improving the heat exchange effect of the external heat source of the stirling engine of the invention are that the smoke spoiler 4 is arranged in a spiral shape, and particularly, the smoke spoiler 4 can be arranged in a single spiral shape. High temperature flue gas 9 lets in from the flue gas entry 3 of heating chamber 2 bottom, then move to exhanst gas outlet 1 gradually along spiral helicine flue gas spoiler 4, in the in-process of moving, the flow path of high temperature flue gas 9 in heating chamber 2 has been prolonged through spiral helicine flue gas spoiler 4, make high temperature flue gas 9 constantly produce the heat exchange in heating chamber 2 with working medium 10 in the heat exchange tube 5, the heat transfer time between high temperature flue gas 9 and the heat exchange tube 5 has been increased, and the flow direction of flue gas is constantly changed through setting up of flue gas spoiler 4, thereby the disturbance to high temperature flue gas 9 has been strengthened, make working medium 10 in the heating tube can be more abundant absorption high temperature flue gas 9 release's heat, the heat transfer effect has been strengthened.
Specifically, as shown in fig. 4a to 4b, high-temperature flue gas 9 enters from a flue gas inlet at the lower part of the heating cavity, exchanges heat with working medium 10 in the heat exchange tube 5 in the heating cavity 2, and then flows out from a flue gas outlet 1 at the upper part of the heating cavity 2. In one embodiment, the temperature of high-temperature flue gas 9 is 1582K, the high-temperature flue gas enters a heating chamber 2 at the speed of 1.15m/s, a working medium 10 with the temperature of 600K enters a heat exchange tube 5 at the speed of 5m/s to exchange heat with the high-temperature flue gas 9, the diameter of the inner space of the heating chamber 2 is 100mm, the height of the inner space of the heating chamber is 120mm, 28 heat exchange tubes 5 are distributed on each flue gas spoiler 4, the wall thickness of each single heat exchange tube 5 is 0.5mm, the inner diameter of each heat exchange tube 5 is 3mm, the outer diameter of each heat exchange tube is 4mm, the tube length of each heat exchange tube is 190.12mm, and after each heat exchange tube 5 is bent in a U shape, the distance between the inner side and the outer side of each heat exchange tube 5 is 16mm. The width of the single spiral smoke spoiler 4 is 50mm, the thread pitch is 35mm, and the thickness of the smoke spoiler 4 is 1mm. For heating chamber 2 that does not have flue gas spoiler 4, this single heliciform flue gas spoiler 4 has prolonged flue gas flow path, becomes high temperature flue gas flow direction from the vertical flow of from the bottom up and flows along the spoiler path of flue gas spoiler 4 to the heat transfer effect of working medium 10 in high temperature flue gas 9 and the heat exchange tube 5 has been strengthened.
According to some embodiments of the device for improving the heat exchange effect of the external heat source of the Stirling engine, the heating chamber 2 can be further internally provided with the plurality of flue gas spoilers 4, the plurality of flue gas spoilers 4 are arranged in the axial direction of the heating chamber 2 at equal intervals, and the plurality of flue gas spoilers 4 are arranged in the heating chamber 2 in the axial direction at equal intervals, so that more turbulent flow paths can be formed in the heating chamber 2, and the heat exchange effect of the high-temperature flue gas 9 and the working medium 10 in the heat exchange tube 5 can be further improved.
Specifically, when only two flue gas spoilers 4 are arranged in the heating chamber 2, the two flue gas spoilers 4 form a double-helix structure, as shown in fig. 5a to 5b, high-temperature flue gas 9 enters from a flue gas inlet 3 at the lower part of the heating chamber 2, exchanges heat with the heat exchange tube 5, and then flows out from a flue gas outlet 1 at the upper part of the heating chamber 2, the flow path of the high-temperature flue gas 9 is also divided into two parts due to the disturbance of the double-helix flue gas spoilers 4, each part moves in a helix, in the present embodiment, the temperature of the high-temperature flue gas 9 is 1582K, the high-temperature flue gas 9 enters the heating chamber 2 at a speed of 1.15m/s, a working medium 10 at a temperature of 600K enters the heat exchange tube 5 at a speed of 5m/s for heat exchange, the diameter of the inner space of the heating chamber 2 is 100mm and the height of 120mm, at least 28 heat exchange tubes 5 are arranged in the heating chamber 2, the wall thickness of each heat exchange tube 5 is 0.5mm, the inner diameter is 3mm, the outer diameter is 4mm, the tube length is 190.12mm, after each heat exchange tube 5U-shaped bend, the inner and the outer side of the heat exchange tube is 16mm, the pitch of the double-shaped flue gas spoilers is 70mm, the pitch of the double-shaped flue gas spoilers is 1mm, and the width of the double-shaped flue gas spoilers 4 is 1mm, and the same as the width of the two vanes. For the heating cavity without the flue gas spoiler 4, the flow path of the high-temperature flue gas 9 is further prolonged by the double-spiral flue gas spoiler 4, so that the flow direction of the high-temperature flue gas 9 is changed from vertical flow from bottom to top into annular flow along the double-spiral spoiler, and the heat exchange effect of the high-temperature flue gas 9 on the working medium 10 in the heat exchange tube 5 is enhanced.
Specifically, when a plurality of flue gas spoilers 4 are arranged in the heating chamber 2, the flue gas spoilers 4 are arranged at equal intervals to form a multi-spiral structure, as shown in fig. 6a to 6b, high-temperature flue gas 9 enters from a flue gas inlet 3 at the lower part of the heating chamber 2, exchanges heat with the heat exchange tube 5, and then flows out from a flue gas outlet 1 at the upper part of the heating chamber 2, the flow path of the high-temperature flue gas 9 is divided into a plurality of parts due to the disturbance of the multi-spiral blades, each part is spiral, the temperature of the high-temperature flue gas 9 is 1582K, the high-temperature flue gas enters the heating chamber 2 at the speed of 1.15m/s, and a working medium 10 with the temperature of 600K enters the heat exchange tube 5 at the speed of 5m/s to exchange heat with the high-temperature flue gas 9. The diameter of the inner space of the heating chamber 2 is 100mm, the height of the heating chamber is 120mm, the heat exchange tubes 5 can be composed of 28 single tubes, the wall thickness of each heat exchange tube 5 is 0.5mm, the inner diameter of each heat exchange tube 5 is 3mm, the outer diameter of each heat exchange tube is 4mm, the tube length of each heat exchange tube is 190.12mm, and after the heat exchange tubes 5 are bent into a U shape, the heating tube intervals of the inner side and the outer side of each U-shaped heat exchange tube 5 are 16mm. The number of the smoke spoilers 4 forming multiple helices can be set to 4, and can also be set to more, and the smoke spoilers can be adjusted according to actual needs, the width of each smoke spoiler 4 is 50mm, the thread pitch is 140mm, the thickness is 1mm, and the smoke spoilers 4 forming multiple helices are arranged at equal intervals. Compared with the heating chamber 2 without smoke turbulence, the multi-spiral smoke turbulence plate 4 prolongs the smoke flowing path, the smoke flowing direction is changed from vertical flowing from bottom to top into multi-spiral flowing along the turbulence path, and the heat transfer effect of the high-temperature smoke 9 to the working medium 10 in the heat exchange pipe 5 is enhanced.
According to one embodiment of the device for improving the heat exchange effect of the external heat source of the Stirling engine, the heat exchange tubes 5 are provided with the U-shaped heat exchange tubes 5 with the same length, the U-shaped heat exchange tubes 5 penetrate through the flue gas spoilers 4 to form the circular tube cluster, the center of the circular tube cluster is overlapped with the center of the heating chamber 2, the heating chamber 2 is provided with the flue gas outlet 1, the upper end face of the heating chamber 2 is arranged, the connecting line of the flue gas outlet 1 penetrates through the center of the end face of the heating chamber 2, namely the flue gas outlet 1 is symmetrically arranged relative to the center of the end face, the flue gas inlets 3 are arranged on the periphery of the lower side wall of the heating chamber 2, the flue gas inlets 3 are circumferentially arranged at equal intervals, so that high-temperature flue gas 9 can simultaneously enter the periphery of the heating chamber 2 to complete heat exchange with working media 10 in the heat exchange tubes 5, in addition, the inner wall of the heating chamber 2 is also provided with the limiting grooves, and the flue gas spoilers 4 are mutually matched with the limiting grooves, so as to complete installation of the flue gas blocking spoilers 4. In addition, the surface forms of the flue gas spoiler 4 and the heat exchange tube 5 are not limited, the surfaces of the flue gas spoiler 4 and the heat exchange tube 5 can be smooth surfaces, and spoiler fins or other spoiler structures can be added to ensure that the flow path of the high-temperature flue gas 9 entering the heating chamber 2 is changed.
The heating chamber 2 of the invention is internally provided with a heat exchange tube 5, a flue gas spoiler 4 and an expansion cavity 7, the outside of the heating chamber 2 is surrounded by a heat insulation wall body, a working medium 10 is input in the heat exchange tube 5, the working medium 10 is usually helium, the heat exchange tube 5 is arranged in a through hole arranged on the flue gas spoiler 4, thereby fixing the heat exchange tube 5 through the flue gas spoiler 4, the working medium outlet 6 of the heat exchange tube 5 is communicated with the inlet of the expansion chamber 7, the working medium inlet 8 of the heat exchange tube 5 is communicated with the outlet of the heat regenerator, thereby realizing the circulating heat exchange between the working medium 10 in the heat exchange tube 5 and the high-temperature flue gas 9 in the heating chamber 2, inputting the working medium 10 from the working medium inlet 8 of the heat exchange tube 5, after exchanging heat with the high-temperature flue gas 9 in the heating chamber 2, the flue gas is output from the working medium outlet 6 of the heat exchange tube 5 to finish the heat exchange with the high-temperature flue gas 9, and on the premise of not adding an external power source, not increasing the useless volume of the hot end and not increasing the total volume of the heating chamber 2, the spiral smoke spoiler 4 prolongs the flow path of the high-temperature smoke 9 in the heating chamber 2, increases the disturbance to the high-temperature smoke 9, the working medium 10 in the heat exchange tube 5 can fully absorb the heat released by the high-temperature flue gas 9, the heat exchange effect is strengthened, the utilization efficiency of the heat of the high-temperature flue gas 9 is improved, the device has simple structure, convenient installation and lower cost, only a plurality of smoke spoilers 4 which are matched with the heat exchange tube need to be installed in the heating chamber 2, and the high-temperature flue gas does not have throttling and flowing dead zones in the process of spirally flowing around the flue gas spoiler 4, and the high-temperature flue gas 9 has small resistance and is not easy to scale or deposit scale, so that the high-temperature flue gas can be efficiently operated for a long time.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should also be considered as disclosed in the present invention, and all such modifications and combinations are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides an improve device of stirling engine outer heat source heat transfer effect, its characterized in that, including heating cavity (2), heat exchange tube (5) and flue gas spoiler (4), heat exchange tube (5) with flue gas spoiler (4) set up in heating cavity (2), seted up on flue gas spoiler (4) a plurality of with heat exchange tube (5) bore assorted mounting hole, heat exchange tube (5) pass the mounting hole with flue gas spoiler (4) link to each other.
2. An arrangement for improving the heat transfer effect of an external heat source of a stirling engine according to claim 1, wherein the flue gas spoiler (4) is provided in a spiral shape.
3. An arrangement for improving the heat transfer effect of an external heat source of a stirling engine according to claim 2, wherein the flue gas spoiler (4) is provided in a single spiral configuration.
4. An arrangement for improving the heat exchange effect of an external heat source of a stirling engine according to claim 2, wherein a plurality of the flue gas spoilers (4) are arranged in the heating chamber (2), and the plurality of the flue gas spoilers (4) are arranged at equal intervals in the axial direction of the heating chamber (2).
5. An arrangement for improving the heat exchange effect of an external heat source of a Stirling engine according to claim 4, wherein the smoke spoiler (4) is configured into a double-spiral structure.
6. An arrangement for improving the heat exchange effect of an external heat source of a stirling engine according to claim 4, wherein the flue gas spoiler (4) is provided in a multi-spiral structure.
7. An arrangement for improving the heat exchange effect of an external heat source of a Stirling engine according to claim 1, wherein the heat exchange tubes (5) are arranged into U-shaped heat exchange tubes, the U-shaped heat exchange tubes are equal in length, and a plurality of the U-shaped heat exchange tubes penetrate through the flue gas spoiler (4) to form a circular ring-shaped tube bundle, and the center of the circular ring-shaped tube bundle is coincident with the center of the heating chamber.
8. The device for improving the heat exchange effect of the external heat source of the Stirling engine is characterized in that the heating chamber (2) comprises a plurality of flue gas inlets (3) and flue gas outlets (1), the flue gas inlets (3) are arranged on the lower side edge of the heating chamber (2) at equal intervals, the flue gas outlets (1) are arranged on the upper end face of the heating chamber (2), and the connecting line of the opposite flue gas outlets (1) penetrates through the center of the end face of the heating chamber (2).
9. The device for improving the heat exchange effect of the external heat source of the Stirling engine is characterized in that a limiting groove is formed in the inner wall of the heating chamber (2), and the smoke spoiler (4) is clamped with the limiting groove so as to fix the smoke spoiler (4).
10. A device for improving the heat exchange effect of an external heat source of a stirling engine according to any one of claims 1 to 9, wherein the flue gas spoiler (4) conforms to the shape of the inner wall of the heating chamber (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2022102244537 | 2022-03-09 | ||
| CN202210224453 | 2022-03-09 |
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| CN115163327A true CN115163327A (en) | 2022-10-11 |
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| CN113175766A (en) * | 2021-04-30 | 2021-07-27 | 华中科技大学 | Double-helix finned tube type adsorption bed for adsorption refrigeration system and application |
| CN214948967U (en) * | 2021-03-29 | 2021-11-30 | 东莞市仙津保健饮料食品有限公司 | Flue gas economizer and condensation steam boiler |
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