Pre-mixing micro-catalysis combustion chamber with low heat loss

Abstract

The invention relates to a micro power system, in particular to a pre-mixing micro-catalysis combustion chamber with low heat loss. A clapboard which is excellent in heat-conducting performance is placed in the micro combustion chamber; the combustion chamber is partitioned into a preheating region and a combustion region; the clapboard is made by bonding a thin copper sheet, a platinum catalyst and a porous copper sheet. Mixed gas is preheated before being ignited, thereby reducing outward heat loss due to radiation, enhancing the flame stability and raising the average temperature of a wall surface.

Description

technical field [0001] The invention belongs to the technical field of micro-power electromechanical systems, and specifically relates to micro-thermal photoelectric devices. It is an innovative design of the combustion chamber structure based on micro-scale premixed combustion technology and catalytic combustion technology, so as to improve the overall performance of the flat-plate micro-thermal photoelectric system; A partition with good thermal conductivity is placed in the micro-combustion chamber, which divides the combustion chamber into a preheating zone and a combustion zone. The partition is made of thin copper sheets, platinum catalysts and porous copper sheets; in this way, the mixed gas is ignited It has been preheated before, which reduces the heat loss to the outside world, and also improves the stability of the flame and the average temperature of the wall. Background technique [0002] Micro power system (Power MEMS) is a new research field of micro electrome...

AI Technical Summary

Problems solved by technology

[0002] Micro power system (Power MEMS) is a new research field of micro electromechanical system (MEMS) developed in recent years; micro power system uses hydrogen or hydrocarbons as fuel, and is characterized in that it is less than 1cm 3 The volume can output 1-20w power; the energy density of hydrogen and hydrocarbons is more than 100 times that of traditional batteries, so the micro power system using hydrogen and hydrocarbons as fuel has a huge advantage over traditional batteries; Several micro-power systems with different concepts have appeared; such as micro gas turbine gas turbine, micro propulsion system, etc.; however, due to the miniaturization of size and the existence of high-speed moving parts, these devices still have many problems, such as heat loss, friction, sealing, processing, assembly, etc.

[0003] Under micro-scale conditions, the residence time of the premixed gas in the combustion chamber is significantly reduced, and the difficulty of complete reaction increases; With the increase of instability, how to achieve high efficiency and stable combustion has become a problem to be solved; at present, the design of thermal cycle or steady flow device is mainly used to achieve stable combustion, such as "Swiss roll" type micro burner, micro blunt body burner etc. However, these burners have complex structures and are not easy to process

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