CN1743767A - Coaxial travelling-wave thermo acoustic drive refrigerating system - Google Patents
Coaxial travelling-wave thermo acoustic drive refrigerating system Download PDFInfo
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- CN1743767A CN1743767A CN 200410074089 CN200410074089A CN1743767A CN 1743767 A CN1743767 A CN 1743767A CN 200410074089 CN200410074089 CN 200410074089 CN 200410074089 A CN200410074089 A CN 200410074089A CN 1743767 A CN1743767 A CN 1743767A
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 18
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- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910000639 Spring steel Inorganic materials 0.000 claims description 4
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- 229920003023 plastic Polymers 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
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Abstract
The present invention relates to refrigeration and cryogenic technique field, specially refer to the refrigeration system that a kind of traveling wave thermoacoustic engine drives row ripple hot sound refrigerating machine, it comprises: traveling wave thermoacoustic engine and row ripple hot sound refrigerating machine; It is characterized in that described traveling wave thermoacoustic engine and row ripple hot sound refrigerating machine are installed among the shell, install one the two strict frequency-modulation element of isolating between traveling wave thermoacoustic engine and the row ripple hot sound refrigerating machine; Described traveling wave thermoacoustic engine is the coaxial travelling-wave thermoacoustic engine, and described capable ripple hot sound refrigerating machine is the coaxial travelling-wave hot sound refrigerating machine.Key technology of the present invention is to use a kind of flexible sheet and elasticity-quality frequency-modulation element with certain mass to substitute the effect of inertia tube and resonatron respectively, and has taked coaxial design.Its advantage is: system architecture is very compact, has eliminated hot sound direct current, and engine and refrigeration machine all can use the best effort medium of oneself.
Description
Invention field
The present invention relates to refrigeration and cryogenic technique field, specially refer to the refrigeration system that a kind of traveling wave thermoacoustic engine drives row ripple hot sound refrigerating machine.
Background technology
It is a kind of refrigeration new method of complete movement-less part that thermoacoustic engine drives hot sound refrigerating machine.Its stable and reliable operation, long service life; Use hotwork to be the energy, can utilize solar energy, used heat etc. as drive source, this is very meaningful for the occasion that electric power lacks; It as working medium, helps environmental protection with inert gas in addition, so have boundless development prospect.
Because the operation of standing wave heat sound machine is based on inner irreversible thermodynamic cycle, the entropy that irreversible heat exchange between its gas and plate are folded causes increases the conversion efficiency that has reduced standing wave heat sound machine, its thermodynamic efficiency often can not be very high, generally all below 0.2, and row ripple heat sound machine is similar to Stirling (Stirling) thermodynamic cycle, its process itself is reversible, therefore the efficient of row ripple heat sound machine is higher than the standing wave thermoacoustic system in theory, Just because of this, utilize row ripple heat sound machine more and more to be subjected to people's attention.
At present, typical traveling wave thermoacoustic engine drive row ripple hot sound refrigerating machine refrigeration system structure as shown in Figure 1, it comprises traveling wave thermoacoustic engine 14 and row ripple hot sound refrigerating machine 15; Traveling wave thermoacoustic engine 14 comprises a traveling wave thermoacoustic engine heater 1, two traveling wave thermoacoustic engine room temperature heat exchangers 2 and 2 ', a traveling wave thermoacoustic engine regenerator 3, a traveling wave thermoacoustic engine separator tube 4, a traveling wave thermoacoustic engine inertia tube 5, a traveling wave thermoacoustic engine capacitive pipe 6, a traveling wave thermoacoustic engine resonatron 7, regenerator 3 two ends connect heater 1 and room temperature heat exchanger 2 respectively, the capacitive pipe 6 of room temperature heat exchanger 2 another termination arcs, capacitive pipe 6 connects inertia tube 5 after turning over 180 degree, inertia tube 5 is made up of with the curved pipe that is connected two sections straight tubes two sections straight tubes, two sections straight tube angles are 90 degree, its internal diameter is less than capacitive pipe 6, the tail end of inertia tube 5 is divided into two, one is continued extension and connects resonatron 7, one is 90 degree and tells through room temperature heat exchanger 2 ' and connect separator tube 4, the other end of separator tube 4 takes back heater 1, thereby constitutes a loop configuration; Row ripple hot sound refrigerating machine 15 comprises a capable ripple hot sound refrigerating machine cold head 8, two capable ripple hot sound refrigerating machine room temperature heat exchangers 9 and 9 ', a capable ripple hot sound refrigerating machine regenerator 10, a capable ripple hot sound refrigerating machine separator tube 11, a capable ripple hot sound refrigerating machine inertia tube 12, a capable ripple hot sound refrigerating machine capacitive pipe 13, its structure is similar to thermoacoustic engine, regenerator 10 two ends connect cold head 8 and room temperature heat exchanger 9 respectively, the capacitive pipe 13 of room temperature heat exchanger 9 another termination arcs, capacitive pipe 13 connects inertia tube 12 after turning over 180 degree, inertia tube 12 is made up of with the curved pipe that is connected two sections straight tubes two sections straight tubes, two sections straight tube angles are 90 degree, its internal diameter is less than capacitive pipe 13, the tail end of inertia tube 12 is divided into two, one is continued extension and links to each other with the resonatron 7 of traveling wave thermoacoustic engine 14, one is 90 degree and tells through room temperature heat exchanger 9 ' and connect separator tube 11, the other end of separator tube 11 takes back cold head 8, thereby constitutes a loop configuration.This shows that row ripple loop has occupied a lot of spaces, and resonatron is very long, reaches several meters even last ten meters, complete machine structure is very not compact, is unfavorable for so very much practical application.Such structure is expert in the ripple loop, also has heat sound direct current, and the existence of heat sound direct current has increased the thermal loss of traveling wave thermoacoustic engine and the loss of refrigeration capacity of row ripple hot sound refrigerating machine, makes the efficient of complete machine greatly descend.In addition, for row ripple hot sound refrigerating machine, working media generally requires good heat conductivity, specific heat capacity is big, gasification temperature is low etc., so helium etc. is only selection; For traveling wave thermoacoustic engine, producing big pressure ratio is its main target, so nitrogen, carbon dioxide, argon gas etc. are its best working medias.And present traveling wave thermoacoustic engine driving row ripple hot sound refrigerating machine generally is to use helium as common working media, and the pressure ratio that makes traveling wave thermoacoustic engine produce so is not too high, and this has also hindered the raising of overall efficiency.
Summary of the invention
The objective of the invention is to, make compact conformationization, the simplification of system, improve the driving pressure ratio, reduce cryogenic temperature, increase refrigerating capacity, thereby a kind of coaxial travelling-wave thermo acoustic drive refrigerating system is provided.
The object of the present invention is achieved like this:
Coaxial travelling-wave thermo acoustic drive refrigerating system provided by the invention comprises: traveling wave thermoacoustic engine 20 and row ripple hot sound refrigerating machine 21; It is characterized in that described traveling wave thermoacoustic engine 20 and row ripple hot sound refrigerating machine 21 are installed among the shell 16, install one the frequency-modulation element of the two isolation between traveling wave thermoacoustic engine 20 and the row ripple hot sound refrigerating machine 21; Described frequency-modulation element is a flexible sheet 19, or constitute by a flexible sheet 19 and the mass 26 that is fixed on a flexible sheet 19 centers, or by one in shell 16 pistons reciprocating 24 constitute with the flexible member that links to each other with piston 24, described flexible member is tension spring, flat spring or linear bearing; Described piston 24 quality are 5～2000 grams.
Described traveling wave thermoacoustic engine 20 is the coaxial travelling-wave thermoacoustic engine, comprise being positioned at frequency-modulation element one side, and begin a coaxial successively continuous heater 1, regenerator 3, room temperature heat exchanger 2, a capacitive pipe 6 and be installed in the phase modulation flexible sheet 17 of capacitive pipe 6 openends with sealing capacitive pipe 6 by its far-end; Leave gap 22 between described shell 16 and heater 1 and the regenerator 3; Leave between capacitive pipe 6 outside wall surface and shell 16 internal faces gap 22 '; Room temperature heat exchanger 2 closely cooperates with shell 16 internal faces;
Described capable ripple hot sound refrigerating machine 21 is the coaxial travelling-wave hot sound refrigerating machine, comprise being positioned at the frequency-modulation element opposite side, and begin a coaxial successively continuous cold head 8, regenerator 10, room temperature heat exchanger 9, a capacitive pipe 13 and be installed in the phase modulation flexible sheet 18 of capacitive pipe 13 openends with sealing capacitive pipe 13 by its far-end; Leave gap 23 between described shell 16 and cold head 8 and the regenerator 10; Leave between capacitive pipe 13 outside wall surface and shell 16 internal faces gap 23 '; Room temperature heat exchanger 9 closely cooperates with shell 16 internal faces.
Described traveling wave thermoacoustic engine is two coaxial travelling-wave thermoacoustic engines 20, these two coaxial travelling-wave thermoacoustic engines 20 and a coaxial travelling-wave hot sound refrigerating machine 21 are " T " word shape and arrange, and be sleeved in " T " word shell 16, two traveling wave thermoacoustic engines 20 are with respect to coaxial travelling-wave hot sound refrigerating machine 21 symmetric arrangement, the cavity A that between two coaxial travelling-wave thermoacoustic engines 20 and coaxial travelling-wave hot sound refrigerating machine 21, has a shell to surround, described frequency-modulation element is installed on near-end one side of the capable ripple hot sound refrigerating machine 21 in this cavity A, and with the axis normal of capable ripple hot sound refrigerating machine 21.
The working media of described traveling wave thermoacoustic engine 20 and ripple hot sound refrigerating machine 21 is respectively B and C; Operating pressure equates; Described working media B be selected from nitrogen, carbon dioxide, argon gas, the helium a kind of, two or more, working media C be selected from helium, nitrogen, argon gas, carbon dioxide, the hydrogen a kind of, two or more.
Described flexible sheet 17,18,19,19 ' be silica gel, rubber, polyester plastics, spring steel, beryllium-bronze or stainless steel.
The tension range of described phase modulation flexible sheet 17,18 is 10
-1～10
4N/m
2, its quality is 5～500 grams.
The tension range of described flexible sheet 19 is 10
2～10
5N/m
2, quality is 5～2000 grams.
Described flexible sheet 19 ' and the gross mass that is fixed therein the mass (26) at heart place be 5～2000 grams, flexible sheet 19 ' tension range be 10
2～10
5N/m
2
The present invention compared with prior art its key technology is to use the flexible sheet with certain mass to substitute the effect of inertia tube, use can separate the engine refrigeration machine, frequency-modulation element that simultaneously can transmission sound merit has substituted the effect of resonatron, and taked coaxial design, make system architecture very compact, size greatly reduces.The diaphragm that substitutes inertia tube can play the purpose of eliminating heat sound direct current, can improve the efficient of engine and refrigeration machine, the frequency-modulation element that substitutes resonatron can reduce the operating frequency of system, can shorten the length of the pipeline that connects engine and refrigeration machine, can separate simultaneously the working media in engine and the refrigeration machine, make engine and refrigeration machine all can use the best effort medium of oneself further to improve the efficient of complete machine.
Description of drawings
Fig. 1 is that traditional traveling wave thermoacoustic engine drives row ripple hot sound refrigerating machine structural representation;
Fig. 2 is that coaxial travelling-wave thermo acoustic drive refrigerating system embodiment 1 frequency-modulation element is the structural representation of flexible sheet;
Fig. 3 is that coaxial travelling-wave thermo acoustic drive refrigerating system embodiment 1 frequency-modulation element is the structural representation that flexible sheet adds mass;
Fig. 4 is that coaxial travelling-wave thermo acoustic drive refrigerating system embodiment 1 frequency-modulation element is the structure of piston schematic diagram;
Fig. 5 is that coaxial travelling-wave thermo acoustic drive refrigerating system embodiment 2 frequency-modulation elements are the structural representation of flexible sheet;
Fig. 6 is that coaxial travelling-wave thermo acoustic drive refrigerating system embodiment 2 frequency-modulation elements are the structure of piston schematic diagram;
Fig. 7 is for adding a flexible sheet schematic diagram in the middle of the standing wave tube.
The specific embodiment
Before the narration specific embodiment, at first briefly explain relating to principles more of the present invention.
The effect that the tradition traveling wave thermoacoustic engine drives inertia tube in the row ripple hot sound refrigerating machine mainly is and capacitive pipe control phase together.And the present invention adopts flexible sheet to replace inertia tube, with capacitive pipe control phase.Its principle is as follows, and the pressure of supposing the flexible sheet both sides is P
1And P
2, the quality of flexible sheet is m, and tension force is K, and the area of flexible sheet is S, then has:
(P
1-P
2)S＝Kx+mx″ (1)
Wherein: x is the displacement of flexible sheet, x " for the second dervative of displacement (1) formula can further be write as following form:
(P
1-P
2)S＝(K-mω
2)x (2)
As can be seen from the above equation, suitably adjustment of tonicity K and quality m just can to obtain different pressure phase poor.
The present invention adopts elasticity-quality frequency-modulation element to replace traditional traveling wave thermoacoustic engine to drive resonatron in the row ripple hot sound refrigerating machine, make the system architecture compactness, volume reduces, and by quality that changes elasticity-quality frequency-modulation element and the frequency that elasticity can reduce system.Be that example illustrates its influence to frequency in managing to add one elasticity-quality frequency-modulation element in the standing wave tube shown in Figure 7 below.Elasticity-quality frequency-modulation element is divided into two ends with pipeline, and left side pipeline is designated as 1 pipeline, and defining its left end is the origin of coordinates, and the right pipeline is designated as 2 pipelines, defines its left end and is another origin of coordinates.
Acoustic pressure is designated as: P (x)=Ee
Ikx+ Fe
-ikx(3)
Then particle velocity is:
Wherein ω is an angular frequency, ρ
0Be the gas averag density, k is a wave number, and E, F are undetermined coefficient.
Left end at 1 pipeline has: E
1-F
1=0 (5)
Right-hand member at 2 pipelines has: E
2e
IkL-F
2e
-ikL=0 (6)
Elasticity-two ends, quality frequency-modulation element left and right sides speed equates, then has:
E
1e
ikL-F
1e
-ikL＝E
2-F
2 (7)
Pressure differential for elasticity-two ends, the quality frequency-modulation element left and right sides equals the elasticity-quality of quality frequency-modulation element and the product of acceleration:
Simultaneous (5) (6) (7) (8) can get:
ωmsin(kL)-2ρ
0α
0Scos(kL)＝0 (9)
α wherein
0Be the gas velocity of sound.Solving equation (9) can obtain the minimum positive number of ω and separate, so calculate the pipe in fundamental frequency.
Suppose in the pipe to be an atmospheric air, pipe length overall 6m, when not adding flexible sheet, the frequency of gas vibration should be 28.7Hz in the pipe.If central authorities add one elasticity-quality frequency-modulation element at pipe, cross-section of pipeline is long-pending to be 0.001m
2, the frequency of oscillation when table 1 has calculated different quality in the pipe.
Table 1
| Quality/ | 0 | 0.005 | 0.01 | 0.015 | 0.02 |
| Frequency/Hz | 28.7 | 17.857 | 13.913 | 11.8 | 10.4 |
As can be seen from Table 1, the quality that increases elasticity-quality frequency-modulation element can reduce system frequency, therefore in design can the part that engine is connected with refrigeration machine do very short, the resonant frequency that the quality by change elasticity-quality frequency-modulation element still can obtain to want.
Specifically describe coaxial travelling-wave thermo acoustic drive refrigerating system provided by the present invention below in conjunction with Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6.
As shown in Figure 2, frequency-modulation element is a coaxial travelling-wave thermoacoustic engine 20 with top.Make the coaxial travelling-wave thermoacoustic engine, comprise a heater 1, regenerator 3, room temperature heat exchanger 2, capacitive pipe 6, a phase modulation flexible sheet 17 and a shell 16, regenerator 3 two ends connect heater 1 and room temperature heat exchanger 2 respectively, room temperature heat exchanger 2 another termination capacitive pipes 6, capacitive pipe 6 opening parts are with 17 sealings of phase modulation flexible sheet.Shell is enclosed within the outside of heater 1 and regenerator 3, leaves certain interval 22 between shell 16 and heater 1 and the regenerator 3, the thermal buffer tube that replaces in traditional traveling wave thermoacoustic engine with this gap 22.Must leave certain clearance between the internal face of the outside wall surface of capacitive pipe 6 and shell 16, sound wave energy is circulated in the crack during this time smoothly.Room temperature heat exchanger 2 closely cooperates with shell 16 internal faces, can not leave the gap, all must carry out heat exchange with the room temperature heat exchanger through the room temperature heat exchanger when making the gas flow of its both sides.
As shown in Figure 2, frequency-modulation element is a coaxial travelling-wave thermoacoustic engine 21 with the lower part.Make the coaxial travelling-wave hot sound refrigerating machine, comprise a cold head 8, regenerator 10, room temperature heat exchanger 9, capacitive pipe 13, a phase modulation flexible sheet 18 and a shell 16, regenerator 10 two ends connect cold head 8 and room temperature heat exchanger 9 respectively, room temperature heat exchanger 9 another termination capacitive pipes 13, capacitive pipe 13 opening parts are with 18 sealings of phase modulation flexible sheet.Shell is enclosed within the outside of cold head 8 and regenerator 3, leaves certain interval 25 between shell 16 and cold head 8 and the regenerator 10, replace thermal buffer tube in tradition row ripple hot sound refrigerating machines with this gap 25.Must leave certain clearance between the internal face of the outside wall surface of capacitive pipe 13 and shell 16, sound wave energy is circulated in the crack during this time smoothly.Room temperature heat exchanger 2 closely cooperates with shell 16 internal faces, can not leave the gap, all must carry out heat exchange with the room temperature heat exchanger through the room temperature heat exchanger when making the gas flow of its both sides.
As shown in Figure 2, make a coaxial travelling-wave thermoacoustic engine 20 and a coaxial travelling-wave thermoacoustic engine 21 respectively with said method, and they are connected together by same shell 16, the cavity that between engine and refrigeration machine, has one section shell to surround, in this cavity, frequency-modulation element is installed, with traveling wave thermoacoustic engine and strict isolation of row ripple hot sound refrigerating machine, this frequency-modulation element has the effect of regulating frequency of sound wave, replace the too huge resonatron of volume in traditional traveling wave thermoacoustic engine driving row ripple hot sound refrigerating machine, played the effect that reduces frequency of sound wave simultaneously.Frequency-modulation element is a flexible sheet 19, its material is a silica gel, quality is 200 grams, tension force is that (this flexible sheet 19 can be selected rubber or polyester plastics for use to 2000N/m as required, can certainly select spring steel, beryllium-bronze or stainless steel and other metal materials for use, its quality between 5-2000 gram all can); Phase modulation flexible sheet 17 and 18 is a silica gel thin film, quality is 20 grams, tension force be 500N/m (this phase modulation flexible sheet 17 and 18 can be selected rubber or polyester plastics as required for use, can certainly select spring steel, beryllium-bronze or stainless steel and other metal materials for use, its quality between 5-500 gram all can).Can use pure nitrogen gas as working media in the traveling wave thermoacoustic engine, the carbon dioxide mixture that also can use the nitrogen of 80% molar content and 20% molar content is as working media.The interior used working media of the ripple hot sound refrigerating machine of being expert at is a helium, and also the mixture that can use helium and carbon dioxide is as working media, and the molar content of two kinds of gases is respectively 95% and 5%.Working medium pressure in engine and the refrigeration machine is 30bar.
During work, at first, in traveling wave thermoacoustic engine 20, charge into working media nitrogen, in row ripple hot sound refrigerating machine 21, charge into the working media helium.In the gas replenishment process and after inflation finishes, must guarantee that traveling wave thermoacoustic engine 20 equates with the pressure of gas in the traveling wave thermoacoustic engine 21, make frequency-modulation element be in the equilbrium position substantially, and the deflection of phase modulation flexible sheet maximum must damage to prevent flexible sheet within its regime of elastic deformation.Open traveling wave thermoacoustic engine heater 1, room temperature heat exchanger 2, formation temperature gradient in the regenerator 3 of traveling wave thermoacoustic engine can produce the thermal acoustic oscillation of self-excitation after thermograde reaches certain value; The thermal acoustic oscillation of self-excitation is that sound wave is propagated from regenerator 3, through heater 1, in gap 22, propagate, arrive room temperature heat exchanger 2 then, 2 pairs of working media nitrogen of room temperature heat exchanger cool off, and arrive phase modulation flexible sheet 17 places again, at phase modulation flexible sheet 17 place's sound wave separated into two parts, a part feeds back to regenerator 3 through engine phase modulation flexible sheet 17, capacitive pipe 6, room temperature heat exchanger 2, and another part is propagated toward the direction of refrigeration machine phase modulation flexible sheet 18.The sound wave of propagating toward refrigeration machine phase modulation flexible sheet 18 directions enters refrigerator system through frequency-modulation element, sound wave at first passes through the cavity between shell 16 and the capacitive pipe 13 in refrigerator system, entered the gap 25 of thermal buffer tube effect through room temperature heat exchanger 9 then, enter regenerator 10 through cold head 8 again, in regenerator 10, carry out the heat carrying, the temperature of cold head 24 is reduced.After this sound wave by room temperature heat exchanger 9, capacitive pipe 13, phase modulation flexible sheet 18, feeds back to the cavity between shell 16 and the capacitive pipe 13 successively.The elastic deformation amount who should be noted that two phase modulation flexible sheets must to prevent the weakening effect of flexible sheet to sound wave, prevent that also flexible sheet is destroyed simultaneously more than or equal to the maximum displacement of its both sides gas.
Frequency-modulation element in the present embodiment can also select for use flexible sheet shown in Figure 3 19 ' to add the form of mass 26, and flexible sheet 19 ' quality is 20 grams, and tension force is 2000N/m, and mass 26 is fixed on the center of flexible sheet 19 ', and quality is 250 grams.The gross mass of flexible sheet 19 ' in the frequency-modulation element of this structure and mass 26 all can between the 5-2000 gram.
Frequency-modulation element in the present embodiment can also be selected frequency-modulation element shown in Figure 4 for use.24 is piston, and 25 is flat spring or linear bearing.Flat spring or linear bearing are fixed on shell 16 inwalls, and support piston is done straight reciprocating motion.The quality of piston 24 all can between the 5-2000 gram.(flat spring and linear bearing are prior aries, therefore it are not described further)
As shown in Figure 5, make two coaxial travelling-wave thermoacoustic engines and a coaxial travelling-wave hot sound refrigerating machine respectively with said method, and they are connected together by " T " word shape shell, two traveling wave thermoacoustic engine symmetric arrangement are beneficial to reduce system vibration.The cavity that between engine and refrigeration machine, has one section shell to surround, in this cavity, frequency-modulation element is installed, this frequency-modulation element is a flexible sheet 19, this diaphragm is positioned at the side by the near traveling wave hot sound refrigerating machine, axis normal with row ripple hot sound refrigerating machine, it will be gone ripple hot sound refrigerating machine and two strict isolation of traveling wave thermoacoustic engine, and communicate between two traveling wave thermoacoustic engines.Frequency-modulation element has the effect of regulating frequency of sound wave, has replaced the too huge resonatron of volume in traditional traveling wave thermoacoustic engine driving row ripple hot sound refrigerating machine, has played the effect that reduces frequency of sound wave simultaneously.Flexible sheet 19 materials are beryllium-bronze, and quality is 300 grams, and tension force is 5000N/m; The phase modulation flexible sheet is a rubber film, and quality is 30 grams, and tension force is 700N/m.Use in the traveling wave thermoacoustic engine mixture that molar content respectively accounts for 1/4 carbon dioxide, helium, nitrogen and argon gas as working media, gross pressure is 35bar; Used working media is the mixture of helium, argon gas and hydrogen in the row ripple hot sound refrigerating machine, and wherein the molar content of helium is 90%, and the molar content of argon gas and hydrogen is 5%, and gross pressure is 35bar.
During work, at first, charge into working media simultaneously in two traveling wave thermoacoustic engines, promptly the mixture of carbon dioxide and helium charges into working media, i.e. the mixture of helium and argon gas in row ripple hot sound refrigerating machine.In the gas replenishment process and after inflation finishes, must guarantee that traveling wave thermoacoustic engine equates with the pressure of gas in the row ripple hot sound refrigerating machine, make frequency-modulation element be in the equilbrium position substantially, and the deflection of phase modulation flexible sheet maximum must damage within its regime of elastic deformation to prevent flexible sheet.The course of work of present embodiment is substantially the same manner as Example 1.Two traveling wave thermoacoustic engines are called first traveling wave thermoacoustic engine and second traveling wave thermoacoustic engine, at first narrate the course of work of first traveling wave thermoacoustic engine.Open heater, the room temperature heat exchanger of first traveling wave thermoacoustic engine, formation temperature gradient in the regenerator of traveling wave thermoacoustic engine can produce the thermal acoustic oscillation of self-excitation after thermograde reaches certain value; The thermal acoustic oscillation of self-excitation is that sound wave is propagated out from regenerator, through heater, in the gap, propagate, arrive the room temperature heat exchanger then, the room temperature heat exchanger cools off working media nitrogen, arrives phase modulation flexible sheet place again, at phase modulation flexible sheet place sound wave separated into two parts, a part feeds back to regenerator through engine phase modulation flexible sheet, capacitive pipe, room temperature heat exchanger, and another part is propagated toward the direction of refrigeration machine phase modulation flexible sheet.The structure of second traveling wave thermoacoustic engine and the first traveling wave thermoacoustic engine symmetry, its course of work is also identical with first traveling wave thermoacoustic engine, therefore no longer repeats.The sound wave of propagating toward refrigeration machine phase modulation flexible sheet direction enters refrigerator system through frequency-modulation element, sound wave at first passes through the cavity between shell and the capacitive pipe in refrigerator system, entered the gap of thermal buffer tube effect through the room temperature heat exchanger then, enter regenerator through cold head again, in regenerator, carry out the heat carrying, the temperature of cold head is reduced.After this sound wave by room temperature heat exchanger, capacitive pipe, phase modulation flexible sheet, feeds back to the cavity between shell and the capacitive pipe successively.The elastic deformation amount who should be noted that three phase modulation flexible sheets must to prevent the weakening effect of flexible sheet to sound wave, prevent that also flexible sheet is destroyed simultaneously more than or equal to the maximum displacement of its both sides gas.
Frequency-modulation element in the present embodiment can also be selected piston for use, as shown in Figure 6.Spring one end is fixed on the outer casing inner wall, and the other end and piston link together.
Claims (8)
1, a kind of coaxial travelling-wave thermo acoustic drive refrigerating system comprises: traveling wave thermoacoustic engine (20) and row ripple hot sound refrigerating machine (21); It is characterized in that described traveling wave thermoacoustic engine (20) and row ripple hot sound refrigerating machine (21) are installed among the shell (16), install one the frequency-modulation element of the two isolation between traveling wave thermoacoustic engine (20) and the row ripple hot sound refrigerating machine (21); Described frequency-modulation element is a flexible sheet (19), or constitute by a flexible sheet (19) and the mass (26) that is fixed on a flexible sheet (19) center, or by a pistons reciprocating (24) and the flexible member formation that links to each other with piston (24) in shell (16), described flexible member is tension spring, flat spring or linear bearing;
Described traveling wave thermoacoustic engine (20) is the coaxial travelling-wave thermoacoustic engine, comprise being positioned at frequency-modulation element one side, and begin coaxial successively continuous a heater (1), a regenerator (3), a room temperature heat exchanger (2), a capacitive pipe (6) and be installed in the phase modulation flexible sheet (17) of capacitive pipe (6) openend with sealing capacitive pipe (6) by its far-end; Leave gap (22) between described shell (16) and heater (1) and the regenerator (3); Leave gap (22 ') between capacitive pipe (6) outside wall surface and shell (16) internal face; Room temperature heat exchanger (2) closely cooperates with shell (16) internal face;
Described capable ripple hot sound refrigerating machine (21) is the coaxial travelling-wave hot sound refrigerating machine, comprise being positioned at the frequency-modulation element opposite side, and begin coaxial successively continuous a cold head (8), a regenerator (10), a room temperature heat exchanger (9), a capacitive pipe (13) and be installed in the phase modulation flexible sheet (18) of capacitive pipe (13) openend with sealing capacitive pipe (13) by its far-end; Leave gap (23) between described shell (16) and cold head (8) and the regenerator (10); Leave gap (23 ') between capacitive pipe (13) outside wall surface and shell (16) internal face; Room temperature heat exchanger (9) closely cooperates with shell (16) internal face.
2, by the described coaxial travelling-wave thermo acoustic drive refrigerating system of claim 1, it is characterized in that, described traveling wave thermoacoustic engine is two coaxial travelling-wave thermoacoustic engines (20), these two coaxial travelling-wave thermoacoustic engines (20) are " T " word shape with a coaxial travelling-wave hot sound refrigerating machine (21) and arrange, and be sleeved in " T " word shell (16), two traveling wave thermoacoustic engines (20) are with respect to coaxial travelling-wave hot sound refrigerating machine (21) symmetric arrangement, the cavity (A) that between two coaxial travelling-wave thermoacoustic engines (20) and coaxial travelling-wave hot sound refrigerating machine (21), has a shell to surround, described frequency-modulation element is installed on near-end one side of the capable ripple hot sound refrigerating machine (21) in this cavity (A), and with the axis normal of capable ripple hot sound refrigerating machine (21).
3,, it is characterized in that the working media of described traveling wave thermoacoustic engine (20) and ripple hot sound refrigerating machine (21) is respectively (B) and (C) by claim 1 or 2 described coaxial travelling-wave thermo acoustic drive refrigerating systems; Operating pressure equates; Described working media (B) be selected from nitrogen, carbon dioxide, argon gas, the helium a kind of, two or more, working media (C) be selected from helium, nitrogen, argon gas, carbon dioxide, the hydrogen a kind of, two or more.
4, by the described coaxial travelling-wave thermo acoustic drive refrigerating system of claim 1, it is characterized in that described flexible sheet (17,18,19,19 ') is silica gel, rubber, polyester plastics, spring steel, beryllium-bronze or stainless steel.
5, by claim 1 or 4 described coaxial travelling-wave thermo acoustic drive refrigerating systems, it is characterized in that the tension range of described phase modulation flexible sheet (17,18) is 10
-1～10
4N/m
2, its quality is 5～500 grams.
6, by claim 1 or 4 described coaxial travelling-wave thermo acoustic drive refrigerating systems, it is characterized in that the tension range of described flexible sheet (19) is 10
2～10
5N/m
2, quality is 5～2000 grams.
7, by claim 1 or 4 described coaxial travelling-wave thermo acoustic drive refrigerating systems, it is characterized in that, described flexible sheet (19 ') and the gross mass that is fixed on the mass (26) of flexible sheet (19 ') center are 5～2000 grams, and the tension range of flexible sheet (19 ') is 10
2～10
5N/m
2
By the described coaxial travelling-wave thermo acoustic drive refrigerating system of claim 1, it is characterized in that 8, described piston (24) quality is 5～2000 grams.
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| CNB2004100740892A CN1332160C (en) | 2004-09-03 | 2004-09-03 | Coaxial travelling-wave thermo acoustic drive refrigerating system |
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|---|---|---|---|
| CNB2004100740892A CN1332160C (en) | 2004-09-03 | 2004-09-03 | Coaxial travelling-wave thermo acoustic drive refrigerating system |
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| CN1743767A true CN1743767A (en) | 2006-03-08 |
| CN1332160C CN1332160C (en) | 2007-08-15 |
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| CN100441980C (en) * | 2006-04-28 | 2008-12-10 | 中国科学院理化技术研究所 | Oil lubrication compressor gas supplied circulating refrigerating device |
| CN100572986C (en) * | 2006-03-24 | 2009-12-23 | 中国科学院理化技术研究所 | Utilize the heat activated traveling wave thermoacoustic cooling device of the coaxial configuration of solar energy |
| CN100593678C (en) * | 2006-12-31 | 2010-03-10 | 中国科学院理化技术研究所 | Tandem type thermoacoustic system |
| CN1818512B (en) * | 2006-03-14 | 2010-04-14 | 中国科学院理化技术研究所 | Device for eliminating straight flow of two-way air inlet pulsing pipe refrigerator |
| CN101566405B (en) * | 2008-04-22 | 2011-05-11 | 中国科学院理化技术研究所 | Thermally-driven thermoacoustic refrigerator device in traveling and stationary wave type acoustic field |
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| CN1137630A (en) * | 1995-06-05 | 1996-12-11 | 中国科学院低温技术实验中心 | Heat driven thermoacoustic refrigerator without motion component |
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| US6792764B2 (en) * | 2002-04-10 | 2004-09-21 | The Penn State Research Foundation | Compliant enclosure for thermoacoustic device |
| US6725670B2 (en) * | 2002-04-10 | 2004-04-27 | The Penn State Research Foundation | Thermoacoustic device |
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| CN100593678C (en) * | 2006-12-31 | 2010-03-10 | 中国科学院理化技术研究所 | Tandem type thermoacoustic system |
| CN101275541B (en) * | 2007-03-27 | 2011-08-31 | 中国科学院理化技术研究所 | Heat voice traveling wave engine and uses thereof |
| CN101566405B (en) * | 2008-04-22 | 2011-05-11 | 中国科学院理化技术研究所 | Thermally-driven thermoacoustic refrigerator device in traveling and stationary wave type acoustic field |
| CN102374152A (en) * | 2010-08-06 | 2012-03-14 | 中国科学院理化技术研究所 | Thermal compressor system |
| CN104048445A (en) * | 2013-03-14 | 2014-09-17 | 中国科学院理化技术研究所 | Cryogenic thermo-acoustic refrigerator without inertance tube or air reservoir |
| CN104048445B (en) * | 2013-03-14 | 2016-01-06 | 中国科学院理化技术研究所 | The low-temperature thermoacoustic refrigerator of a kind of noninertia pipe and air reservoir |
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