CN201656858U - Micro combustion semi-conductor thermoelectric generator - Google Patents
Micro combustion semi-conductor thermoelectric generator Download PDFInfo
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- CN201656858U CN201656858U CN2010201733897U CN201020173389U CN201656858U CN 201656858 U CN201656858 U CN 201656858U CN 2010201733897 U CN2010201733897 U CN 2010201733897U CN 201020173389 U CN201020173389 U CN 201020173389U CN 201656858 U CN201656858 U CN 201656858U
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Abstract
A micro combustion semi-conductor thermoelectric generator belongs to the field of electronic equipment. The generator comprises an upper thermoelectric generating sheet (4), an upper heat insulating sheet (2), a combustor (1), a lower heat insulating sheet (3) and a lower thermoelectric generating sheet (5) which are arranged sequentially from top to down, wherein the combustor (1) comprises a baseplate (9) provided with an air inlet channel (7), a combustion chamber (10) and an air outlet channel (6), and the air inlet channel (7) and the air outlet channel (6) parallel to each other and adopt variable diameters. The thermoelectric generator relates to the field of individual combat batteries, and is particularly suitable for supplying power for micro devices in the outdoors without common power sources and in the high-grade, high-precision, advanced technical fields of military and aviation by virtue of the advantages of small size, light weight and strong continuous service behavior.
Description
Technical field
The utility model relates to the mini combustion-type semiconductor thermo-electric generator of a kind of power demand several watts of magnitudes.
Background technology
Battery is the indispensable equipment of modern military forces use, to investigation equipment, to individual soldier's night vision goggles, arrives the warship opportunity of combat from thermal imager greatly from communication instrument, and the little GPS receiver that arrives all be unable to do without battery.The battery of necessary portable was ten hundreds of when according to statistics, the fight that drops into was sought in fight of U.S. army.Concerning the dismounted troops of 100 pounds of masterpiece wartime requirement heavy burdens, battery is a white elephant.Remove weight, battery performance also is a problem, and traditional battery working time is limited to be a common fault.
The development of individual soldier's compact power is one of the emphasis in electric power energy field.The purpose of this plan is to alleviate soldier's burden, provide crucial pulse power to set up, and minimizing is used to develop first-class fuel cell and electric capacity logistics and disposal cost.The parts exploitation of being devoted to compact power can be described as the foundation stone of hybrid power source, and the pulse operation pattern that can satisfy ground force's application in electric power system will obtain priority.Modern military equipment trends towards to electronization, miniaturization, and the stealth development, more and more to the demand of small generator especially.Common army's power plant for emergency mainly is made up of diesel engine generator, gasoline engine generator, fuel cell, storage battery etc. at present.Recent owing to the semiconductor temperature differential generating Development of Materials, and the superiority of temperature difference electricity generation device, adopt the military generator of semiconductor temperature difference power generating system more and more to come into one's own.
Abroad to the research of minisize thermoelectric electric organ more deep scientific research institutions such as Princeton university, University of Southern California and Michigan university are arranged.Minisize thermoelectric electric organ (Micro Fire) was released in U.S. USC aerodynamic experiment chamber in 2000, German Dresden University of Science and Technology utilizes Copper Foil to research and develop a kind of minisize thermoelectric electric organ as medium, and its area is 16 * 30mm
2, output voltage reaches 250mV.The Swiss-Roll thermoelectric converter that size has only coin-size has been invented by the Princeton University, and studied fuel sustained combustion requirements such as comprising hydrogen, methane, studies show that, more than 300 ℃ the time, hydrogen and Air mixing device can react under ratio in a big way, the heat that reaction produces through thermoelectric conversion, can be lighted the bulb of 100mW from 2W to 12W.
Domestic aspect: the microchannel combustion phenomena of platinum has been studied by Taiwan National Chenggong University.Pre-mixing gas combustion with hydrogen and air experimentizes, and combustion gas enters platinotron through preheating and produces reaction, and the platinotron surface covers with the ceramic wool of heat conductivity difference.Experimental result shows that air mixture has good reaction in the caliber of 1mm, 0.5mm and 0.2mm, and when temperature during greater than 550 degrees centigrade, platinotron reddens because of vigorous reaction, so can not work long hours.Experimental result show with platinum be catalyst to carry out the microtubule burning be feasible, its development has good space.People such as Tsing-Hua University clock Beijing have obtained the Flammability limits of burner and the Temperature Distribution situation at different Reynolds number lower combustion chamber center to two-dimentional Swiss-Roll burner having been carried out numerical simulation, have carried out some relevant experimental studies in addition.
The work of being done for minute yardstick burning and microminiature thermoelectric converter both at home and abroad mainly concentrates on the device fabrication micro-combustion experiment aspect relevant with some, does not almost carry out the research work of contents such as even distribution in the temperature field of the temperature difference that how to keep cold and hot section of thermoelectric generator and burner.
Existing patented invention is central to be ZL 200920126143.1 " a kind of portable minisize thermoelectric generator " as University Of Chongqing's patent No., adopt the catalytic combustion mode, its catalytic reaction bulk temperature will maintain 500-600 ℃, still the high temperature limit that can bear far above electrothermal module; Catalyst combustion reaction speed is lower than gas-phase reaction in addition, so the effective heat duty and the energy density of catalytic burner can reduce under the minute yardstick, and the catalyst in the micro-burner can not steady in a long-term, effectively work.
The design that adopts combustion tail gas heating semiconductor temperature differential generating sheet hot junction is also arranged, as Chinese Academy of Sciences Guangzhou Energy Research Institute's application number is 200910042333.X " a kind of minisize thermoelectric generator ": burner is by the burning of fuel, utilize the hot junction of its high-temperature tail gas heating electrothermal module, make with water-cooling pattern between the cold junction of the hot junction of electrothermal module and electrothermal module and produce temperature difference, thereby change temperature difference into electric energy output.Though this mode has reduced maximum temperature, but combustion chamber and thermo-electric generation sheet independent distribution, the heat major part that burning is produced is passed to the burner hearth wall with forms of radiation, be lost in the environment through thermal convection, obtained the lower tail gas of temperature like this, there are several problems in this design: the one, and the loss of heat is serious, and the 2nd, do not give full play to the effect of combustion chamber.
When adopting the flame combustion mode, for the identical caliber that is in the quenching diameter scope, combustion gas can not burnt therein, can cause heat too to concentrate on inside, combustion chamber like this, thereby make the skewness in temperature field, and then produce new problem: at first, the generated output instability of semi-conducting material; Secondly, semi-conducting material internal temperature gradient is excessive, and then corresponding thermal stress is inevitable very big, and the life-span reduces; Moreover, owing to there is the temperature extremal point, can directly burn semi-conducting material, and if avoid burning material, then can only reduce fuel, cause generating efficiency and power all to descend, also loss of stability burns.
The present invention mainly is a kind of mini combustion-type semiconductor thermo-electric generator of development, and burner can be described as the critical component of semiconductor temperature difference generator.The burner of superior performance is not only the needs that the microminiature thermoelectric generator works long hours, and also provides good working environment for the semiconductor temperature differential generating sheet.According to the domestic and international research progress,, still be that the catalytic combustion mode all can not solve the problem that is produced at present then no matter adopt flame combustion if use the burner that is in the identical caliber in the quenching diameter scope.For this reason, under the prerequisite that satisfies systematic entirety and perfect in shape and function, this team has designed a kind of burner: employing be the pipeline configuration of gradual change type and the symmetry arrangement form of many combustion chambers, made full use of the heat that burning is produced, and outlet passageway can pre-heating intaking, improves the air inlet enthalpy, realize smooth combustion, also solved simultaneously problems such as flame tempering, combustion mode is safe and effective, and the temperature field that obtains through numerical simulation in earlier stage distributes comparatively even.
Summary of the invention
The purpose of this utility model is to provide a kind of mini combustion-type semiconductor thermo-electric generator, and its burner combustion stability, temperature distribution evenness all are better than existing microminiature thermoelectric generating device.
A kind of mini combustion-type semiconductor thermo-electric generator is characterized in that: comprise thermo-electric generation sheet, last heat shield, burner, intake of food in the morning and vomitting in the evening backing, following thermo-electric generation sheet from top to bottom successively; Wherein burner comprises substrate, has inlet channel, combustion chamber and outlet passageway on the substrate successively, and wherein inlet channel and outlet passageway are parallel type structure; Above-mentioned inlet channel is divided into three sections along the air inlet route, and first section diameter is less than maximum quenching diameter, and second section diameter is greater than maximum quenching diameter, and the 3rd section diameter is less than maximum quenching diameter; Above-mentioned its outlet passageway is divided into three sections along the route of giving vent to anger, and first section diameter is less than maximum quenching diameter, and second section diameter is greater than maximum quenching diameter, and the 3rd section diameter is less than maximum quenching diameter; Be provided with electronic ignition device in the above-mentioned combustion chamber.
Adopt the purpose that becomes caliber to be to control the fail safe of flame combustion on the one hand, realized the even distribution of heat on the other hand, specifically: combustion gas can not be burnt less than the part of quenching diameter scope at caliber, and during by big caliber, because mass flow conservation, speed can reduce, and high-temperature fuel gas increased in the burner internal stops time, and the even diffusion of heat has also been quickened in heat exchange area increase simultaneously.Find after deliberation: if employing is greater than the caliber of maximum quenching diameter near the import and export of combustion chamber, then will form two flame fronts in inside, combustion chamber, admission line and outlet pipe to the combustion chamber extends respectively, heat can be derived rapidly, and circumference wall, the wall of high temperature is the continuous gas in heating air inlet pipeline and the outlet pipe also, make that the quenching distance under the minute yardstick is nonsensical, even just caliber is less than quenching diameter, but because the heat effect of high-temperature wall surface, feasible burning still can take place, and the direct result of Chan Shenging is that burning is tempered to import like this, and safety loses guarantee.So a kind of like this pipeline configuration of this patent design.
Above-mentioned mini combustion-type semiconductor thermo-electric generator can adopt the single combustion chamber structure, is specially: the combustion chamber is positioned at the center of substrate, and above-mentioned inlet channel and outlet passageway are Double-spiral around this combustion chamber.The parallel spiral of inlet channel and outlet passageway is arranged, and has on the one hand reduced flow resistance, has improved the air inlet enthalpy on the other hand, makes under the minute yardstick burning more stable.
Above-mentioned mini combustion-type semiconductor thermo-electric generator, can adopt many chamber structures, be specially: the substrate of said burner evenly is divided into 3-4 sub-combustion zone, and wherein each combustion zone is established respectively by above-mentioned inlet channel and combustion chamber and outlet passageway and formed.Many chamber structures can be distributed to each combustion zone through the heat that burning is produced more equably with identical charge flow rate with single combustion chamber, simultaneously more air-flow conduit has increased the heat convection area, slow down the degree of burning of burner, thereby also optimized the even distribution of heat.
In above-mentioned many chamber structures, the import of the inlet channel of all sub-combustion zones can all be positioned at substrate center and communicate, and so just can adopt same admission line to provide combustion gas and Air mixing gas to burner, and is convenient and practical.
In above-mentioned many chamber structures; all sub-combustion zones can be symmetrically distributed along substrate center; size according to institute's subregion area; the winding number of admission line and outlet pipe is set, and sub-combustion zone number is many more, and geometric figure is complicated more; process also difficult more; this patent adopts 3-4 combustion chamber to many combustion-chamber burners, if any number is more but the burner that structure is identical, all within this patent rights protection scope.
Above-mentioned mini combustion-type semiconductor thermo-electric generator, its substrate can comprise upper substrate and infrabasal plate, and upper substrate and infrabasal plate have groove, and the butt joint back forms above-mentioned inlet channel, combustion chamber and outlet passageway; And between parallel model inlet channel and outlet passageway, form the dividing plate that links to each other with substrate.This processing method needs upper and lower base plate is all done etching, and processing is comparatively complicated, but seal is better.
Above-mentioned mini combustion-type semiconductor thermo-electric generator, its substrate can be carved with groove, and this substrate and last heat shield, heat shield is fitted and formed above-mentioned inlet channel, combustion chamber and outlet passageway down.Processing is simple, but seal is relatively poor.
Fuel constantly enters combustion chamber and sustained combustion by admission line, radiation and heat conduction along with heat, the heat sink uniform temperature that is heated to, heat is from the hot junction of both direction heating thermo-electric generation sheet up and down, and make thermo-electric generation sheet two ends form the temperature difference by certain type of cooling, continue the output electric energy at power output end.
The utility model has the advantages that: burner operation safety and stability, temperature field are more evenly distributed, its profile is a sheet type, volume is little, can be effectively be electric energy output with the thermal power transfer of fuel combustion, be specially adapted to not have the open-air of common power and provide power supply for the micro device in military, the aviation aspect high, precision and frontier technical field.
Description of drawings
Fig. 1 is the sectional view of mini combustion-type semiconductor thermo-electric generator.
Fig. 2 is the two-sided heat-supply type burner of a mini combustion-type semiconductor thermo-electric generator single combustion chamber structure chart.
Fig. 3 is the two-sided heat-supply type burner three chamber structure figure of mini combustion-type semiconductor thermo-electric generator.
Fig. 4 is the two-sided heat-supply type burner four chamber structure figure of mini combustion-type semiconductor thermo-electric generator.
Figure of abstract and above-mentioned each number in the figure title, 1. burner is 2. gone up heat shield, 3. descends heat shield, 4. goes up the thermo-electric generation sheet, 5. descends the thermo-electric generation sheet, 6. outlet passageway, 7. inlet channel, 8. dividing plate, 9. substrate, 10. combustion chamber
Embodiment
With reference to accompanying drawing, the utility model comprises thermo-electric generation sheet 4 and following thermo-electric generation sheet 5 on the power output end, burner 1 with different pipeline configurations, usually formed by high temperature resistant and nonconducting silicon chip or silicon dioxide etching, its spiral channel spirals with circular or square or suitable arbitrarily shape on same plane.Helix-type flute is square spiraling in the illustrated example, and its height and width are between 500um～1mm.For single combustion chamber burner (Fig. 2), at last thermo-electric generation sheet 4 and following thermo-electric generation sheet 5, and and the center of last heat shield 2 and following heat shield 3 be provided with through hole, connect electronic ignition device, usually make height, the width of the diameter of thermo-electric generation sheet central through hole and pipeline identical, combustion gas enters central combustion chamber's burning after outlet passageway is expelled to atmospheric environment from inlet channel 7.The heat that burning is discharged is given last thermo-electric generation sheet 4 and following thermo-electric generation sheet 5 by last heat shield 2 and following heat shield 3 heat conduction, makes the top and bottom of thermo-electric generation sheet form a fixed difference difference by certain type of cooling and exports electric energy then.As can see from Figure 2, before entering spiral channel, caliber is within the quenching diameter, and can realize local flame propagation in whole spiral channel, can guarantee that the combustion gas burning can not be tempered to air inlet, and stability and safety can be controlled.Combustion gas can not be burnt less than the part of quenching diameter scope at caliber, and during by big caliber, because the mass flow conservation, speed can reduce, and high-temperature fuel gas increased in the burner internal stops time, and heat exchange area increases and also quickened the even diffusion of heat simultaneously.
For many combustion-chamber burners, a plurality of combustion chambers are arranged, the gas-air body enters from the air inlet that is in same through hole rectangle or positive triangle and arranges, in the center, combustion chamber igniter is arranged, the gas that ignites, the air intake duct diameter is in the quenching diameter scope, can realize the stability and safety burning, outlet pipe subregion diameter is about 2 times of admission line diameters, and this spatial dimension also can realize methane or combustion of hydrogen, makes heat distribution more even.Consider the quenching diameter scope, fuel gas adopts compression gases such as methane or hydrogen to mix mutually with compressed air.The combustion chamber of three kinds of burners is imported and exported the position and has all been adopted the gradual change caliber, makes flame stabilization in inside, combustion chamber, and then obtains the even temperature field, good working environment is provided for the semiconductor temperature differential generating sheet.
Claims (7)
1. a mini combustion-type semiconductor thermo-electric generator is characterized in that: comprise thermo-electric generation sheet (4), last heat shield (2), burner (1), intake of food in the morning and vomitting in the evening backing (3), following thermo-electric generation sheet (5) from top to bottom successively;
Wherein burner (1) comprises substrate (9), has inlet channel (7), combustion chamber (10) and outlet passageway (6) on the substrate (9) successively, and wherein inlet channel (7) is a parallel type structure with outlet passageway (6);
Above-mentioned inlet channel (7) is divided into three sections along the air inlet route, and first section diameter is less than maximum quenching diameter, and second section diameter is greater than maximum quenching diameter, and the 3rd section diameter is less than maximum quenching diameter;
Above-mentioned its outlet passageway (6) is divided into three sections along the route of giving vent to anger, and first section diameter is less than maximum quenching diameter, and second section diameter is greater than maximum quenching diameter, and the 3rd section diameter is less than maximum quenching diameter;
Above-mentioned combustion chamber is provided with electronic ignition device in (10).
2. mini combustion-type semiconductor thermo-electric generator according to claim 1, it is characterized in that: the combustion chamber (10) of said burner (1) is positioned at the center of substrate (9), and above-mentioned inlet channel (7) and outlet passageway (6) are Double-spiral around this combustion chamber (10).
3. mini combustion-type semiconductor thermo-electric generator according to claim 1, it is characterized in that: the substrate (9) of said burner (1) evenly is divided into 3-4 sub-combustion zone, and wherein each combustion zone is established respectively by above-mentioned inlet channel (7) and combustion chamber (10) and outlet passageway (6) and formed.
4. mini combustion-type semiconductor thermo-electric generator according to claim 3 is characterized in that: the import of the inlet channel of above-mentioned all sub-combustion zones (7) all is positioned at substrate (9) center and communicates.
5. mini combustion-type semiconductor thermo-electric generator according to claim 3 is characterized in that: above-mentioned all sub-combustion zones are symmetrically distributed along substrate (9) center.
6. mini combustion-type semiconductor thermo-electric generator according to claim 1, it is characterized in that: aforesaid substrate (9) comprises upper substrate and infrabasal plate, upper substrate and infrabasal plate have groove, and the butt joint back forms above-mentioned inlet channel (7), combustion chamber (10) and outlet passageway (6); And between parallel model inlet channel (7) and outlet passageway (6), formed the dividing plate (8) that links to each other with substrate.
7. mini combustion-type semiconductor thermo-electric generator according to claim 1, it is characterized in that: aforesaid substrate (9) is carved with groove, and this substrate (9) forms above-mentioned inlet channel (7), combustion chamber (10) and outlet passageway (6) with last heat shield (2), following heat shield (3) applying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201733897U CN201656858U (en) | 2010-04-27 | 2010-04-27 | Micro combustion semi-conductor thermoelectric generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201733897U CN201656858U (en) | 2010-04-27 | 2010-04-27 | Micro combustion semi-conductor thermoelectric generator |
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| CN201656858U true CN201656858U (en) | 2010-11-24 |
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| CN2010201733897U Expired - Lifetime CN201656858U (en) | 2010-04-27 | 2010-04-27 | Micro combustion semi-conductor thermoelectric generator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860280A (en) * | 2010-04-27 | 2010-10-13 | 南京航空航天大学 | Mini combustion-type semiconductor thermo-electric generator |
| CN103114877A (en) * | 2013-03-08 | 2013-05-22 | 青岛大学 | Energy recovery device |
| CN103475268A (en) * | 2013-09-03 | 2013-12-25 | 华中科技大学 | Micro-burning electric generating device |
-
2010
- 2010-04-27 CN CN2010201733897U patent/CN201656858U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860280A (en) * | 2010-04-27 | 2010-10-13 | 南京航空航天大学 | Mini combustion-type semiconductor thermo-electric generator |
| CN101860280B (en) * | 2010-04-27 | 2012-07-25 | 南京航空航天大学 | Mini combustion-type semiconductor thermo-electric generator |
| CN103114877A (en) * | 2013-03-08 | 2013-05-22 | 青岛大学 | Energy recovery device |
| CN103475268A (en) * | 2013-09-03 | 2013-12-25 | 华中科技大学 | Micro-burning electric generating device |
| CN103475268B (en) * | 2013-09-03 | 2016-04-20 | 华中科技大学 | A kind of micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101124 Effective date of abandoning: 20120725 |