CN103090384A - Regenerative microscale burner filled with porous media - Google Patents
Regenerative microscale burner filled with porous media Download PDFInfo
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- CN103090384A CN103090384A CN2013100147961A CN201310014796A CN103090384A CN 103090384 A CN103090384 A CN 103090384A CN 2013100147961 A CN2013100147961 A CN 2013100147961A CN 201310014796 A CN201310014796 A CN 201310014796A CN 103090384 A CN103090384 A CN 103090384A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention relates to a microscale flat plate type regenerative burner filled with porous media. The burner comprises a channel formed by an air inlet, an air outlet and a burner outer wall, wherein one end of the channel is closed and a T-shaped partition board is arranged at the other end of the channel. The T-shaped partition board is composed of a transverse partition board and a longitudinal end board, wherein the transverse partition board extends into the channel, the length of the transverse partition board is shorter than the length of the channel, the porous media are arranged on both an upper area and a lower area of the transverse partition board, the longitudinal end board is arranged on an end opening position of the other end of the channel, and the air inlet and the air outlet are both formed in the longitudinal end board and are symmetrically distributed at two sides of the position of the transverse partition board. According to the microscale flat plate type regenerative burner filled with porous media, a rectangular channel in the burner is divided into two areas by a middle heat conducting partition board, thus regenerative burning is realized. Due to the fact that the design which combines the porous media with the regenerative burning is adopted, microscale burning process in the channel is enabled to be sufficient and stable, and radiation wall temperature distribution is high and uniform, and accordingly positive effects for enhancing output property of a miniature thermal optoelectronic system are generated.
Description
Technical field
The invention belongs to small power Mechatronic Systems (Power MEMS, be called for short micropower system) field, belong to a kind of novel backheat combustion technology, refer in particular to a kind of flat backheating type burner of minute yardstick of filling porous medium.
Background technology
In recent years, along with deepening continuously of MEMS (Micro Electro-Mechanical System is called for short MEMS) research, the problem of micro power also is caused extensive attention gradually.After the Mechatronic Systems microminiaturization, the large young pathbreaker of its power supply or power set determines the size of whole system, do not have the power set of microminiaturization or miniaturization to provide the energy and power for it, the MEMS system will be difficult to bring into play its microminiaturized advantage, even might lose the meaning of its microminiaturization own.Under such a background, just to have arisen at the historic moment based on the micro power systems (Power MEMS) of hydrocarbon fuel combustion, its energy density is expected to break through 100kW/kg, therefore also is described as the 4th milestone of dynamic power machine development.
Micro power systems has that energy density is high, the source is abundant, supply is rapid, portable, the life-span is long and to a series of advantages such as environmental injury are little, thereby potential application scenario is very many, except the power supply that can serve as the MEMS such as micropump, microdriver, microrobot, can also fight etc. for mobile electronic device, wireless telecommunications system, spacecraft, automobile, soldier necessary electric energy or power is provided, thus this device further develop that improve also will be to the huge positive impact of all trades and professions such as microelectronics, information, biology generation.At present, research for such device has made some progress, also the micro power systems of existing various ways is by develop, as silicon-base miniature gas turbine, miniature rotary polygonal piston engine, minisize thermoelectric electric organ, minitype heat optoelectronic system, micro-free-piston/cylinder electrical power generator, miniature resonance reciprocating internal combustion engine etc.
In above-mentioned several micro-power plants, minitype heat optoelectronic system (Micro-thermophotovoltaic System, abbreviation MTPV System) operation principle is comparatively unique, it utilizes hydrocarbon fuel at the heat energy that the micro-burner internal combustion produces, the burner outer wall face to be heated, and the sufficiently high photon strikes low bandgap of the energy that high-temperature wall surface gives off photocell produces electric energy.Compare with other device, it is simple in structure, and advantage is also very obvious, is mainly reflected in: at first, the employing of premixed combustion mode will improve complete combustibility greatly under same residence time; Secondly, because this system utilizes the emittance of high-temperature wall surface to carry out photoelectric conversion, under minute yardstick, the burner face just can significantly increase the whole efficiency of system than large characteristics; At last, owing to there is no moving component, processing and assembling are very easy to, and also do not have the problems such as the leakage that caused by friction and parts inefficacy.
Yet, the efficient of minitype heat optoelectronic system and power density are all also fully up to expectations, practical application from device still has not small distance, its reason is also many-sided, wherein comparatively outstanding is a bit of paramount importance parts---micro-scale burner in system, the effect of its internal-combustion tissue not yet reaches best condition, thereby causes the bulk temperature of radiating surface desirable not enough.Compare with the burning under conventional yardstick, in micro-system, the smooth combustion process realizes that difficulty is larger, problem concentrates on mainly that the fuel residence time is short, large surface to volume ratio causes the excessive and fuel of heat loss to select on some unique combustion characteristics such as face is narrow, and this is also other common problem that faces based on micro-power plant of minute yardstick burning.And the micro-burner that minitype heat optoelectronic system adopts has certain difference with the burner in other a few class micro power systems, and this is because the outside wall surface of burner has also been served as the radiator of follow-up photoelectric conversion process.So we also wish the chemical energy burned device outside wall surface absorption as much as possible that burning produces, to keep the condition of high temperature of wall when pursuing full combustion of fuel.
Therefore, for minitype heat optoelectronic system, how we carry out the appropriate design of burner effectively, how to realize stable minute yardstick combustion process, how about obtain higher outside wall surface Temperature Distribution, just seem particularly important.
Summary of the invention
The present invention is according to the characteristics of minute yardstick burning and the job requirement of minitype heat optoelectronic system, designs a kind of flat backheating type burner of minute yardstick of novel filling porous medium.
Basic structure of the present invention and operation principle be as shown in Figure 1: designed burner mainly is comprised of three parts, the porous media of the T-shape dividing plate that the burner outer wall of right-hand member sealing, left end insert and dividing plate up and down.Combustor external is rectangular structure, its inside is also rectangular channel, be provided with the heat conduction baffle of a horizontal positioned near the left end place at the central cross-section of this burner, fill with porous material respectively the corresponding region up and down of dividing plate, thereby form porous media district separately, dividing plate right side remainder is designed to the combustion zone.Like this, fuel and oxidant are after abundant premix, to at first pass through porous media district, bottom, entering into the combustion zone burns, after the combustion product that generates passes through from the porous media district on top again, drain into outside device finally by exhaust outlet, after the heat that the outer wall of burner (being the radiation wall) produces absorbs, then complete follow-up opto-electronic conversion task in to combustion process.
A kind of porous media backheating type micro-scale burner of the present invention comprises the passage that air inlet, gas outlet and burner outer wall consist of, and an end sealing of passage, the other end are provided with T-shaped dividing plate; T-shaped dividing plate is made of diaphragm plate and vertical end plate, and diaphragm plate extends in passage, and diaphragm plate length is less than passage length; The upper and lower zone of diaphragm plate all arranges porous media; Vertical end plate is positioned at the port of the passage other end, and air inlet, gas outlet all are arranged on vertical end plate, and is symmetrically distributed in the both sides of diaphragm plate position.
Burner outer wall adopts the SiC ceramic material to make, and T-shaped separator material is copper-tungsten, and porous media adopts Al
2O
3Foam micropore ceramics or high temperature resistance multilayer wire netting are processed to form, and adopt high-temperature plastic to be bonded in the both sides up and down of diaphragm plate.
The invention has the advantages that following two aspects: at first, arranging of heat conduction baffle can realize the backheat burning easily, the tail gas that i.e. burning produces can carry out preheating to the air inlet of opposite side by central dividing plate, therefore the heat content of air inlet is significantly increased, and then can improve the reaction speed in micro-scale burner, the flame failure limit of reduction fuel; Secondly, the setting in porous media district, dividing plate up and down, not only can be in even gas distribution, extend air-flow at the residence time of burner inside, thereby improve the completeness of combustion process, and the accumulation of heat ability of porous media can also play and strengthen the effect that between dividing plate two sidewinds, heat transmits, and makes the effect of backheat further be strengthened, and under identical operating condition, the air inlet enthalpy can rise to higher numerical value.Therefore, under the comprehensive function of porous media and these two parts of heat conduction baffle, pyroreaction zone in micro-burner will better be expanded, maximum temperature also will be improved, this will bring, and radiation wall place is higher, more uniform temperature distributes, thereby the output performance that improves minitype heat optoelectronic system is produced positive effect, be used widely as early as possible in association area for this system and lay a solid foundation.
Description of drawings
Fig. 1 is the structural representation of the flat micro-scale burner of porous media backheating type;
1. air inlets wherein, 2. exhaust outlet, 3. T-shape dividing plate 4. descends the porous media district, 5. goes up the porous media district, 6. combustion zone, 7. burner outer wall (radiation wall);
Fig. 2 is T-shape diaphragm structure schematic diagram.
The specific embodiment
The flat micro-scale burner of porous media backheating type has as shown in Figure 1 comprised air inlet 1, exhaust outlet 2, T-shape dividing plate 3, lower porous media district 4, upper porous media district 5, combustion zone 6 and burner outer wall (radiation wall) 7.
In the present invention, the micro-scale burner outside is rectangular structure, the length of two outside wall surface in up and down and the size on width are 10mm * 10mm, its external overall height is 2.4mm, consider the actual effect of opto-electronic conversion, burner adopted emissivity be 0.9 and SiC ceramic material with stronger resistance to elevated temperatures process; When making, at first the available dedicated boring cutter is processed into the inner rectangular channel design of left side opening, right side sealing with a SiC piece that meets above-mentioned apparent size, and channel height is 2mm, and namely burner wall 7 thickness are 0.2mm; Subsequently, for forming the backheat passage, can adopt high temperature resistant, heat conductivility preferably copper-tungsten (as CuW55) process a T-shape diaphragm structure 3 as shown in Figure 2, wherein laterally (horizontal positioned) part is namely as heat conduction baffle, and thickness is that 0.2mm, length and width are of a size of 5mm * 10mm; Left side longitudinal baffle thickness is also that 0.2mm, height and width dimensions and burner apparent size are consistent, be 2.4mm * 10mm, the hole that it is 0.8mm that its center, up and down respectively processes a diameter is with air inlet 1 and the exhaust outlet 2 as burner; Then, be the Al that 0.9mm, length width size and heat conduction baffle are consistent with two thickness
2O
3Foam micropore ceramics or high temperature resistance multilayer wire netting adopt high-temperature plastic to be bonded in the both sides up and down of heat conduction baffle, to form the porous media district 4 and 5 in burner; At last, to fill in previous rectangle burning gallery with the T-shape dividing plate of porous media, and utilize high-temperature plastic that the wall portions of longitudinal baffle and the burning gallery leftmost side is bonded and sealed, finally form a flat micro-scale burner of porous media backheating type.
During work, gas cylinder out hydrogen (or methane) and oxygen (or air) after pressure-reducing valve decompression, first by the gas mass flow controller limited flow rate, after enter in blender and fully mix, mixed gas is imported in micro-burner through nozzle by the copper conduit.By the setting to flow controller, can realize the accurate control to fuel, oxidizer flow rate and equivalent proportion.
Claims (2)
1. a porous media backheating type micro-scale burner, comprise the passage that air inlet, gas outlet and burner outer wall consist of, and it is characterized in that: an end sealing of passage, the other end are provided with T-shaped dividing plate; T-shaped dividing plate is made of diaphragm plate and vertical end plate, and diaphragm plate extends in passage, and diaphragm plate length is less than passage length; The upper and lower zone of diaphragm plate all arranges porous media; Vertical end plate is positioned at the port of the passage other end, and air inlet, gas outlet all are arranged on vertical end plate, and is symmetrically distributed in the both sides of diaphragm plate position.
2. a kind of porous media backheating type micro-scale burner according to claim 1 is characterized in that: burner outer wall adopts the SiC ceramic material to make, and T-shaped separator material is copper-tungsten, and porous media adopts Al
2O
3Foam micropore ceramics or high temperature resistance multilayer wire netting are processed to form, and adopt high-temperature plastic to be bonded in the both sides up and down of diaphragm plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310014796.1A CN103090384B (en) | 2013-01-16 | 2013-01-16 | A kind of porous media backheating type micro-scale burner |
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| CN201310014796.1A CN103090384B (en) | 2013-01-16 | 2013-01-16 | A kind of porous media backheating type micro-scale burner |
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| CN103090384A true CN103090384A (en) | 2013-05-08 |
| CN103090384B CN103090384B (en) | 2016-04-06 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321780A (en) * | 2013-06-04 | 2013-09-25 | 天津科技大学 | Electric energy and thrust generating method and device through micro pulse combustion |
| CN103629666A (en) * | 2013-11-06 | 2014-03-12 | 江苏大学 | Bidirectional gas inlet heat-returning type microscale combustor filled with porous media |
| CN103712211A (en) * | 2013-12-18 | 2014-04-09 | 江苏大学 | Pre-mixing micro-catalysis combustion chamber with low heat loss |
| CN104791796A (en) * | 2015-03-30 | 2015-07-22 | 济南大学 | S-shaped regenerative chamber type regenerative burner nozzle |
| CN106100518A (en) * | 2016-06-14 | 2016-11-09 | 中国工程物理研究院材料研究所 | Passive slight fever photoelectricity, slight fever electricity and slight fever combined power system and implementation method |
| CN108278600A (en) * | 2018-02-08 | 2018-07-13 | 江苏大学 | A kind of combined type minute yardstick backheating type burner |
| CN111765457A (en) * | 2020-06-28 | 2020-10-13 | 江苏科技大学 | Combined micro burner using waste heat |
| CN113091059A (en) * | 2021-03-22 | 2021-07-09 | 武汉理工大学 | Anisotropic miniature flat burner |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103321780A (en) * | 2013-06-04 | 2013-09-25 | 天津科技大学 | Electric energy and thrust generating method and device through micro pulse combustion |
| CN103321780B (en) * | 2013-06-04 | 2015-10-28 | 天津科技大学 | A kind of micropulsation burning electric energy and thrust production method and device |
| CN103629666A (en) * | 2013-11-06 | 2014-03-12 | 江苏大学 | Bidirectional gas inlet heat-returning type microscale combustor filled with porous media |
| CN103712211A (en) * | 2013-12-18 | 2014-04-09 | 江苏大学 | Pre-mixing micro-catalysis combustion chamber with low heat loss |
| CN103712211B (en) * | 2013-12-18 | 2016-04-06 | 江苏大学 | A kind of micro-catalytic combustor of low-heat loss premixed |
| CN104791796A (en) * | 2015-03-30 | 2015-07-22 | 济南大学 | S-shaped regenerative chamber type regenerative burner nozzle |
| CN106100518A (en) * | 2016-06-14 | 2016-11-09 | 中国工程物理研究院材料研究所 | Passive slight fever photoelectricity, slight fever electricity and slight fever combined power system and implementation method |
| CN108278600A (en) * | 2018-02-08 | 2018-07-13 | 江苏大学 | A kind of combined type minute yardstick backheating type burner |
| CN108278600B (en) * | 2018-02-08 | 2024-02-09 | 江苏大学 | Combined microscale regenerative burner |
| CN111765457A (en) * | 2020-06-28 | 2020-10-13 | 江苏科技大学 | Combined micro burner using waste heat |
| CN113091059A (en) * | 2021-03-22 | 2021-07-09 | 武汉理工大学 | Anisotropic miniature flat burner |
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| CN103090384B (en) | 2016-04-06 |
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Granted publication date: 20160406 Termination date: 20170116 |