CN1195158C - Heater for thermoacoustic engine - Google Patents

Abstract

The present invention discloses a heater for a thermoacoustics engine, which is provided with a rigid pipe, wherein both ends of the rigid pipe are provided with connecting parts. The rigid pipe is transversely penetrated with a plurality of cuboid blocks which are parallel mutually, wherein a thermal source channel is arranged in the middle of each cuboid block, the periphery of the end of each cuboid block is fixedly sealed with the wall surface of the rigid pipe, and fluid channels are arranged longitudinally at the intervals of the cuboid blocks in the rigid pipe. A thermoacoustics effect is a phenomenon of the interconversion between heat and sound, and a thermoacoustics engine is a device which realizes the conversion of heat energy and sound energy by using the thermoacoustics effect. The similar device which realizes the conversion of heat energy and sound energy can be divided into a thermoacoustics engine and a thermoacoustics refrigerating machine according to the direction of energy conversion, and can also be divided into a standing wave type, a traveling wave type and a mixed type of standing wave and traveling wave according to the feature of a sound field. The thermoacoustics engine can build a suitable phase relation between the velocity and the pressure of oscillating fluid without external mechanical means, and no moving parts exist in a system of the thermoacoustics engine except oscillating gas; especially a slide sealing part is eliminated, so that the present invention has the advantages of simple structure and long service life.

Description

The thermoacoustic engine heating equipment

Technical field

The present invention relates to a kind of thermoacoustic engine heating equipment, this heater can be used for the heating of interior motion of pipeline and non-moving fluid.

Background technique

Thermoacoustic engine utilizes thermoacoustic effect that thermal power transfer is the sound merit, and the heat of input is provided by heater, so heater is one of core component of thermoacoustic engine, plays a part very important in thermoacoustic engine.Theoretical along with heat sound and test further extension, thermoacoustic engine are towards high-power, high efficiency target development, and the efficient, the heating power that how to improve heater have become one of thermoacoustic engine exploitation urgent problem.Mode of heating commonly used at present has: gas fuel combustion heating, electric heating tube heating, ribbon heater heating, solar energy heating, steam heating, induction heating, carborunbum tube heating etc., no matter but select which kind of mode of heating, all need to design a kind of compactness, heat exchanger efficiently.We are applicable to electric heating tube mode of heating, gas fuel combustion mode of heating, steam heating mode, induction heating mode, carborunbum tube mode of heating etc. by the thermoacoustic engine heating equipment of design.When between the different heating mode, switching, only need the working medium or the mode of thermal source one side are done some suitable adjustment.

Summary of the invention

The purpose of this invention is to provide a kind of thermoacoustic engine heating equipment.

It has rigid pipe, the rigid pipe two ends are provided with connected element, laterally run through being provided with the cuboid piece that a plurality of centres that are parallel to each other have the thermal source passage on the rigid pipe, its end periphery and rigid pipe wall fixing seal, place, the inherent cuboid of rigid pipe block gap vertically is provided with the fluid passage.

Thermoacoustic effect is the phenomenon of changing mutually between heat and the sound, i.e. time equal thermomechanical effect between working fluid in the sound field and the solid dielectric.Thermoacoustic engine is a kind of device of realizing heat energy and acoustic energy conversion by thermoacoustic effect.Can be divided into according to the transformation of energy direction: thermoacoustic engine (also claiming thermoacoustic compressor), hot sound refrigerating machine; Can be divided into according to sound field characteristic: stationary mode, travelling-wave type, the capable ripple hybrid type of standing wave.Thermoacoustic engine does not need outside mechanical means just can make between the speed of oscillating fluid and the pressure to set up suitable phase relationship, in the system except that oscillating gas, do not have moving element, particularly eliminated sliding sealing part, therefore simple in structure and service life is long.

The core component of thermoacoustic engine is: cooler, thermal acoustic regenerator, heater.Cooler and heater are in the regenerator two ends respectively, because their cooling and heating, bigger temperature gradient of axial formation at thermal acoustic regenerator, this gradient is the driving force of thermoacoustic engine work, and reaching the critical value thermoacoustic engine when the axial-temperature gradient of regenerator is spontaneous oscillation.Cooler is stabilized in ambient temperature to the cold junction temperature of regenerator, so the size of regenerator axial-temperature gradient just depends primarily on the heating power that heater provides.More than analyze the proper functioning that explanation will realize thermoacoustic engine, following condition is indispensable: working fluid, solid dielectric, temperature gradient.Because the heater in the thermoacoustic engine is in the high pressure hyperbaric environment, and can be limited for the space of heating, so sealing and heat transfer problem are particularly outstanding.Advantage of the present invention is: slot on rigid pipe, insertion has the cuboid piece of thermal source passage, the contacted periphery in cuboid piece end and rigid pipe surface is guided in sealing, solve with welding or bonding method then, electric heating tube can mount and dismount very easily and not influence other parts of heater simultaneously, and therefore a kind of new approaches of effective solution High Temperature High Pressure sealing problem are provided; Fluid passage and thermal source passage are evenly distributed, and fluid is evenly heated, and in the confined space, can evenly provide bigger heating power for fluid.

Description of drawings

Fig. 1 is a thermoacoustic engine heating equipment example overall pattern;

Fig. 2 is the sectional view of the heater fluid passage of charged heat pipe.

Embodiment

The thermoacoustic engine heating equipment has rigid pipe 2, the rigid pipe two ends are provided with connected element 4, laterally run through on the rigid pipe and be provided with the cuboid piece 3 that a plurality of centres that are parallel to each other have the thermal source passage, its end periphery and rigid pipe wall fixing seal, the inherent cuboid piece of rigid pipe 3 intervals vertically are provided with fluid passage 1.

The effect of fluid passage is for fluid provides path, simultaneously heat is passed to fluid.The final goal of design and making heater is that working fluid is heated to desired temperature at the heater place, so guiding theory of the present invention is efficiently, equably fluid is heated.The material of fluid passage does not have strict restriction, preferably has bigger thermal conductivity and can anti-higher temperature, but can consider to add poor conductors such as one deck pottery or asbestos when Insulation Problems exists.The fluid passage can directly cut out on material with wire cutting method, also can utilize the gap between the plate to make.The effect of rigid pipe is a seals high pressure gas, big passage is provided and realizes connection between the pipeline, provides rigid support for the fluid passage simultaneously.The cuboid piece that has the thermal source passage is used for by solid heating arrangements such as high temperature fluid or placement electric heating tubes, and its receives and transmits to the fluid passage from the heat of high temperature heat source and these heats, is a heat exchanger components therefore.Thermal source passage material is not strict with, preferably has bigger thermal conductivity and can anti-higher temperature, but when Insulation Problems occurs, can consider to add from the teeth outwards materials such as one deck pottery, asbestos, its another one important function be by and rigid pipe between the welding or bonding realization elevated-temperature seal.Thermal source is the carrier of heat of high temperature, is the heat supply parts.The kind of thermal source depends on the selection of mode of heating, and the present invention is applicable to electric heating tube mode of heating, gaseous fuel mode of heating, steam or hot water mode of heating, induction heating mode, carborunbum tube mode of heating.Therefore thermal source can be electric heating tube, high-temperature flue gas, high-temperature steam, hot water, induction installation or carborunbum tube etc.The effect of connected element is to realize being connected of heater and other conduit component.

The fluid passage of exemplary heater is by (Φ 100 * 100mm) reaches the standard grade and cuts out 36 rectangular channels and make, and it also can select other material such as stainless steel etc. for use at the brass cylinder.Rigid pipe is made with high temperature resistant stainless steel, and internal diameter is 100mm, and it both can use ready-made Stainless Steel Tube, also can directly process with stainless steel bars; The cuboid piece is of a size of 96 * 12 * 120mm, directly cuts out on stainless steel materials with wire cutting method; Need to prove, adopt the method that directly on stainless steel bars, cuts out fluid passage and thermal source passage can make making easier, just no longer include independent rigid pipe, fluid passage like this in the heater and have the cuboid piece of thermal source passage, but the three is closed as a whole.Thermal source is the nickel chrome wire electric heating tube of using always, in order to reduce the thermal contact resistance of it and thermal source passage, and electric heating tube tightness slightly in inserting passage the time, this exemplary heater has designed 24 electric heating tubes altogether.After carrying out above-mentioned individual components, the fluid passage with immersing in liquid nitrogen after cold being set in the rigid pipe, hang down as for the fluid axial passage and between the fluid passage, cut out three grooves that connect rigidity tube walls and fluid passage, be of a size of 96 * 12mm, the cuboid piece with immersing in liquid nitrogen after cold packing in the slot, outside argon arc welded seal, on cuboid tile height direction, cut out the thermal source passage then, have 3 cuboid pieces in the exemplary heater, have 8 thermal source passages on each cuboid piece, at last electric heating tube is inserted in the passage.

The material of said fluid passage, rigid pipe, cuboid piece can be stainless steel, red copper, brass, alloy, pottery or asbestos; Thermal source is high-temperature steam, hot water, high-temperature flue gas, electric heating tube, carborunbum tube or indcution heater; The form of connected element is flange connection, welding or integral production.

Use bolt heater other parts close-coupled during use, will realize excellent sealing between flange with thermoacoustic engine.Because heater is in the condition of high temperature, so the sealing of it and other parts generally will be adopted metal or other alloy pad.After the thermoacoustic engine assembling is finished, system is vacuumized to guarantee that the inside does not have exist (the removing oxidizing gas) of air, the degree of vacuum of system charges into high-pressure working gas after reaching requirement, then electric heating tube is switched on, and heater enters working state.After heater continuous operation a period of time, the regenerator hot-side temperature constantly raises, and the axial-temperature gradient of regenerator reaches system's starting of oscillation after the critical value.If system is quit work, only need to cut off the power supply of electric heating tube.When this exemplary heater was used for non-thermoacoustic engine occasion separately, usage mode was identical.

Claims (6)

1. thermoacoustic engine heating equipment, it is characterized in that: have rigid pipe (2), the rigid pipe two ends are provided with connected element (4), laterally run through on the rigid pipe and be provided with the cuboid piece (3) that a plurality of centres that are parallel to each other have the thermal source passage, its end periphery and rigid pipe wall fixing seal, the inherent cuboid piece (3) of rigid pipe interval vertically is provided with fluid passage (1).

2. a kind of thermoacoustic engine heating equipment according to claim 1 is characterized in that: the material of said fluid passage is stainless steel, red copper, brass, alloy, pottery or asbestos, being shaped as circle, rectangle or the rectangle of fillet is arranged of its runner.

3. a kind of thermoacoustic engine heating equipment according to claim 1 is characterized in that: the material of said rigid pipe is stainless steel, red copper, brass, alloy or pottery; The profile of rigid pipe is cuboid, cylindrical body or elbow.

4. a kind of thermoacoustic engine heating equipment according to claim 1 is characterized in that: the material of said cuboid piece is stainless steel, red copper, brass, alloy, pottery or asbestos; The thermal source passage be shaped as circle, rectangle, the rectangle that fillet is arranged or fin.

5. a kind of thermoacoustic engine heating equipment according to claim 1 is characterized in that: said thermal source is high-temperature steam, hot water, high-temperature flue gas, electric heating tube, carborunbum tube or indcution heater.

6. a kind of thermoacoustic engine heating equipment according to claim 1 is characterized in that: the form of said connected element is that flange connection, welding or system are done.

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