CN108645248B - A kind of volumetric heat exchanger and its working method of self-pulsating enhanced heat exchange - Google Patents
A kind of volumetric heat exchanger and its working method of self-pulsating enhanced heat exchange Download PDFInfo
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- CN108645248B CN108645248B CN201810466107.3A CN201810466107A CN108645248B CN 108645248 B CN108645248 B CN 108645248B CN 201810466107 A CN201810466107 A CN 201810466107A CN 108645248 B CN108645248 B CN 108645248B
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- heat exchanger
- self
- shell
- exchanger tube
- heat exchange
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
- F28D7/024—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/10—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by imparting a pulsating motion to the flow, e.g. by sonic vibration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention provides the volumetric heat exchanger and its working method of a kind of self-pulsating enhanced heat exchange, and the heat exchanger includes shell, partition, heating agent entrance pipeline section, heating agent outlet pipe section, refrigerant inlet pipeline section, refrigerant exit pipeline section, heat exchanger tube, hose, flow-limiting valve, self-oscillation device and pulsation hydraulic transmission system.The volumetric heat exchanger of self-pulsating enhanced heat exchange provided by the invention, thermal medium generates pulsing jet by the helmholtz resonance chamber of self-oscillation device, pulsing jet is efficiently converted into the beneficial vibration of heat exchanger tube using pulsation hydraulic transmission system, compared to steady-flow operating condition, heat exchange efficiency is improved 30%.Heat exchange efficiency is improved, heat exchanger tube heat transfer area and material consumption are reduced, it is compact-sized, it is easy for installation, it can be applied to Ship Waste Heat recycling, power station oil transportation, chemical industry heating etc..
Description
Technical field
The present invention relates to a kind of pulsation enhanced heat exchange device, in particular to the positive displacement of a kind of self-pulsating enhanced heat exchange exchanges heat
Device and its working method, belong to technical field of heat exchangers.
Background technique
In daily industrial production, because thermal energy transmitting, exchange, conversion and control etc. need, heat exchanger is largely used.It is many
Well known, volumetric heat exchanger overall dimension is big, and heat transfer coefficient is small, this is because the fluid phase of heating surface and surrounding
Smaller to speed, there is only free convection circulations, this makes traditional volumetric heat exchanger heat exchange property very low.In addition, exchanging heat
Fouling often declines heat exchange property constantly in device.In recent years, it with domestic energy saving policy and the growth requirement of industry, changes
The enhanced heat exchange problem of hot equipment is increasingly paid close attention to.As a branch of enhanced heat exchange technology, Pulsating Flow enhanced heat exchange by
Pay attention to more and more.Pulsating Flow can achieve the effect that inhibit fouling while improving equipment heat exchange property again, therefore have
Its unique superiority receives extensive concern both at home and abroad, and has in industrial production and daily life and widely answer
Use prospect.But for potentially contacting between Pulsating Flow and vibration stream, current research work lacks very much.Strengthen in pulsation
It, can be also seldom using the design that beneficial vibration is enhanced heat exchange service in heat exchange.
Pulsating Flow is exactly the fluid of the generating periods such as flow parameter such as pressure, speed or variation paracycle.Common arteries and veins
Dynamic flow generating apparatus can be divided into two classes: autoexcitation pulsation source and pressure pulsation source.Fluid autoexcitation pulsation source mainly passes through and changes
Become pipeline structure form to generate the device of pulsation, this pulsation source is without additional consumption pump work.Existing autoexcitation pulsation source
There are one-way valve system, auto-excitation type system etc..One-way valve system, cardinal principle are opening under certain condition by check valve
Close the pulsation to cause flow.Such as industry in flow-limiting valve, when in pipeline flow velocity greatly to a certain extent after, flow-limiting valve is automatic
It closes, to cause fluid pressure pulses.One distinguishing feature of one-way valve system is that shock wave fluctuation pressure is high, in pipeline
Flowing be in reversing current feature.There are many types in self-pulsating source, relatively typically utilizes helmholtz resonance chamber principle,
Self-oscillation is generated in resonant cavity, and forms pulsing jet in outlet nozzle.
Application No. is 201210145569.8 patents to disclose a kind of adjustable reciprocating pulsating flow intensified heat transmission heat exchanger,
It, can be with enhanced heat exchange by adjusting mean flow rate, ripple frequency, the pulse amplitude of the revolving speed control Pulsating Flow of motor.But by
In needing to need electric energy, and energy consumption is very high by motor and frequency modulation pipeline pump trandfer fluid.Tradition pulsation fills
It sets generally using the methods of solenoid valve or reciprocating pump, but these pulse modes belong to active heat transfer enhancement technology, need to consume volume
Outer energy consumption, is restricted in practical applications.
Application No. is 201621070008.6 patents to disclose a kind of impact of water hammer pulsation wave heat-exchanger rig, passes through spring
The switch of check valve and dash valve, causes impact of water hammer wave in heat-exchange system, and loine pressure is presented large amplitude and periodically presses
Power pulsation, so that the heat exchange property on plate-type heat-exchange surface is improved.Although a kind of passive pulsation enhanced heat exchange, does not have
Have to hold and potentially be contacted between Pulsating Flow and pipeline configuration vibration, can not be strengthened using advantageous configuration vibration
Heat exchange service.
Summary of the invention
The purpose of the invention is to overcome the above-mentioned problems of the prior art and defect, it is strong to provide a kind of self-pulsating
Change the volumetric heat exchanger of heat exchange.
The present invention significantly more efficient can utilize fluid self-pulsating and will flow in the case where being not necessarily to consume external energy consumption
Body pulsation is converted to heat exchanger tube beneficial to vibration, plays augmentation of heat transfer, scale suppression and the effect of scale removal.
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of volumetric heat exchanger of self-pulsating enhanced heat exchange, including shell, partition, heating agent entrance pipeline section, heating agent go out
Mouth pipeline section, refrigerant inlet pipeline section, refrigerant exit pipeline section, heat exchanger tube, hose, flow-limiting valve, self-oscillation device and pulsation fluid power pass
Dynamic device；The partition is equipped in the shell, the partition is equipped with hole, and the shell is separated into up and down by the partition
Two cavitys, the upper cavity and the lower chamber are connected to by the hole on the partition, and the refrigerant exit pipeline section is connected to institute
The upper cavity of shell is stated, the refrigerant inlet pipeline section is connected to the lower chamber of the shell, and the heat exchanger tube passes through the partition
Hole, the arrival end of the heat exchanger tube are located in the upper cavity of the shell and are connected to the heating agent inlet tube by the hose
Section, the outlet end of the heat exchanger tube are located in the lower chamber of the shell and are connected to the heating agent by another hose
Outlet pipe section；The pulsation hydraulic transmission system includes top cover, pedestal, diaphragm, rigid rod structure and reset spring, the bottom
Seat is fixed on the housing, and the diaphragm is equipped between the top cover and the pedestal, and the pedestal, which is equipped with, is connected to the film
The hole of piece, one end of the rigid rod structure pass through the top cover and withstand on the diaphragm, and the other end goes out with the heat exchanger tube
Mouth end is fixed, and the reset spring is additionally provided between the rigid rod structure and the top cover；The self-oscillation device includes
Front nozzle vibrates chamber, rear nozzle, outlet(discharge) flange and flanks pipeline, and the vibration is equipped between the front nozzle and the rear nozzle
Swing chamber, the rear nozzle by the outlet(discharge) flange be connected to the pedestal hole and it is described flank pipeline, the front nozzle is logical
Cross heating agent outlet pipe section described in the pipeline connection equipped with the flow-limiting valve.
It is further preferred that the shape of the shell is cuboid, the hole of the partition is circular hole, the aperture of the partition
The unilateral gap of edge and the heat exchanger tube is 10-20mm.Coolant media enters upper cavity from the lower chamber of the shell, warp
The heat exchanger tube is crossed, is sufficiently exchanged heat with the thermal medium in the heat exchanger tube；Wherein refrigerant, thermal medium can be water, oil
Deng.
It is further preferred that the oscillation chamber is helmholtz resonance chamber, the diameter of the front nozzle is less than the rear spray
The diameter of mouth, the front nozzle, the hole of the rear nozzle and the pedestal are coaxial.
It is further preferred that the rigid rod structure includes vertical bar and the round tube that vertical bar top is arranged in, the round tube set
Mounted in the outlet end of the heat exchanger tube, the other end of the vertical bar is equipped with flange, and the reset spring is sleeved on the vertical bar
On, one end withstands on the other end on the flange of the vertical bar and withstands on the top cover.
It is further preferred that the pedestal includes upper flange and lower flange, the end face of upper flange side is recessed interior
Concave surface, the pedestal are installed on the housing by its lower flange, and the cap edge is equipped with the upper flange with the pedestal
The mounting flange to match is equipped with hole in the middle part of the top cover, installs the mounting flange, described of top cover described in screw bolt passes
Upper flange and the fixation of the edge mounting hole and the pedestal of diaphragm, the diaphragm rest part are tightly fitted in the interior of pedestal
On concave surface.The material of the diaphragm can be stainless steel or rubber.
It is further preferred that the heating agent entrance pipeline section, the heating agent outlet pipe section penetrate the shell and with it is described
Case weld.
It is further preferred that the hose is wire braided hose, by inner glue layer, layer of steel wire braiding layer and outer glue-line group
At internal diameter is equal with the heat exchange pipe outside diameter.Hose bearing capacity is high, and non-deformability is strong, have excellent oil resistant, it is heat-resisting,
Ageing-resistant performance.
It is further preferred that the heat exchanger tube uses stainless steel material, arranged in coiled, it is good flexible axially having
Property,
Preferably, the coil pipe internal diameter of the heat exchanger tube is 20-30mm, and wall thickness 2-3mm, spiral linear diameter is 100-200mm,
Number is enclosed as 5-15 circle, screw pitch 20-40mm.
A kind of working method of the volumetric heat exchanger of self-pulsating enhanced heat exchange of the invention, includes the following steps:
Step 1: thermal medium enters the heat exchanger tube through the heating agent entrance pipeline section, coolant media enters through the refrigerant
Mouth pipeline section enters the shell, and thermal medium transfers heat to coolant media by the heat exchanger tube；
Step 2: from the thermal medium of pipe out that changes after heating agent outlet pipe section outflow, through the limit
It flows valve and reaches the front nozzle, when the flow velocity of thermal medium reaches the limit value of the flow-limiting valve, the flow-limiting valve closes automatically
It closes, to generate controllable fluid pressure pulse, the flowing in pipeline is in reversing current feature, destroys thermal medium described
The heat transfer coefficient of the heat exchanger tube and scale suppression and scale removal are improved in boundary layer in heat transfer tube wall；
Step 3: when the flow velocity of thermal medium that flowed out from the heating agent outlet pipe section the flow-limiting valve limit value with
When lower, enter the oscillation chamber by the front nozzle, when the unstable perturbation wave that the front nozzle generates is passing through the vibration
When swinging chamber, fluid self-oscillation is generated, forms pulsing jet at the rear nozzle；
Step 4: the pulsing jet come out from the rear nozzle impacts the pulsation hydraulic power along the outlet(discharge) flange
The diaphragm in device, the diaphragm pumps under the action of pulsing jet and the reset spring, then
The of reciprocating vibration of the heat exchanger tube is caused by the rigid rod structure being bonded with the diaphragm, and then in the shell
The thermal medium and coolant media for carrying out heat exchange cause pulsation to interfere, and effectively destroy the side of coolant media and thermal medium
Interlayer increases fluid turbulent degree inside and outside the heat exchanger tube, improves convection transfer rate, and is able to suppress the heat exchange
Pipe and the enclosure interior fouling reduce the housing bottom sediment, and last thermal medium flanks pipeline outflow from described,
And the refrigerant value being heated is flowed out from the refrigerant exit pipeline section.
It is further preferred that from the heating agent entrance pipeline section flow into thermal medium flow velocity 1.5m/s~3m/s it
Between, temperature is between 55 DEG C to 90 DEG C, and the limit value of the flow-limiting valve is between 3-3.5m/s.
Compared with prior art, technical solution of the present invention has the following advantages and beneficial effects:
The volumetric heat exchanger of self-pulsating enhanced heat exchange provided by the invention, thermal medium is by self-oscillation device
Helmholtz resonance chamber generates pulsing jet, and pulsing jet is efficiently converted into heat exchanger tube using pulsation hydraulic transmission system
Beneficial to vibration, coolant media and thermal medium are destroyed in the boundary layer of heat exchange pipe surface；Reach in thermal medium flow velocity in 3-
When prescribed limits between 3.5m/s, using opening and closing of the flow-limiting valve in the limit value, the violent reciprocal vibration of heat exchanger tube had both been prevented
It is dynamic, and thermal medium is made to form pressure fluctuation, the pulsation of thermal medium flow is caused, the turbulivity of thermal medium is increased；In this way
The case where being not necessarily to external energy consumption, steady-flow operating condition is compared, heat exchange efficiency can be improved 30%.It can not only prevent from changing
The fouling of heat pipe can also effectively inhibit enclosure interior fouling, reduce housing bottom sediment, improve heat exchanger service life,
And reduce the operation expense to volumetric heat exchanger.Due to improving heat exchange efficiency, reduce heat exchanger tube heat-transfer area
Long-pending and material consumption, compact-sized, occupied area is small, easy for installation, can be applied to Ship Waste Heat recycling, power station oil transportation, chemical industry
The fields such as heating.
Detailed description of the invention
Fig. 1 is the overall structure schematic three dimensional views of the embodiment of the present invention；
Fig. 2 is the cross-sectional view of the embodiment of the present invention；
Fig. 3 is heating agent circuit schematic three dimensional views in the embodiment of the present invention；
Fig. 4 is self-oscillation device and the enlarged drawing at pulsation hydraulic transmission system in the embodiment of the present invention；
Fig. 5 is the schematic three dimensional views of heat exchanger tube in the embodiment of the present invention；
Fig. 6 is the schematic three dimensional views of self-oscillation device in the embodiment of the present invention；
Fig. 7 is the cross-sectional view of self-oscillation device in the embodiment of the present invention；
Fig. 8 is the schematic three dimensional views of middle arteries of embodiment of the present invention hydrodynamic force actuators；
Fig. 9 is the cross-sectional view of middle arteries of embodiment of the present invention hydrodynamic force actuators；
Figure 10 is the schematic three dimensional views of diaphragm in the embodiment of the present invention；
Figure 11 is the schematic three dimensional views of rigid rod structure in the embodiment of the present invention；
In figure: 1 be shell, 2 be partition, 3 be heating agent entrance pipeline section, 4 be heating agent outlet pipe section, 5 be refrigerant inlet pipeline section,
6 it is refrigerant exit pipeline section, 7 be heat exchanger tube, 8 be hose, 9 is that pipeline I, 10 is flow-limiting valve, 11 be pipeline II, 12 is from exciting
Swing device, 12-1 is front nozzle, 12-2 be oscillation chamber, 12-3 be rear nozzle, 12-4 is outlet(discharge) flange, 12-5 be flank pipeline,
13 be pulsation hydraulic transmission system, 13-1 is top cover, 13-2 is pedestal, 13-3 is diaphragm, 13-4 is rigid rod structure, 13-5
For reset spring.
Specific embodiment
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and direction term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.
It as shown in Figures 1 to 4, is a kind of volumetric heat exchanger of self-pulsating enhanced heat exchange of the invention, including shell
1, partition 2, heating agent entrance pipeline section 3, heating agent outlet pipe section 4, refrigerant inlet pipeline section 5, refrigerant exit pipeline section 6, heat exchanger tube 7, hose
8, flow-limiting valve 10, self-oscillation device 12 and pulsation hydraulic transmission system 13；The partition 2 is equipped in the shell 1, it is described
Partition 2 is equipped with hole, and the shell 1 is divided into two cavitys up and down, the upper cavity and the lower chamber by the partition 2
By the hole connection on the partition 2, the refrigerant exit pipeline section 6 is connected to the upper cavity of the shell 1, the refrigerant inlet
Pipeline section 5 is connected to the lower chamber of the shell 1, and the heat exchanger tube 7 passes through the hole of the partition 2, the arrival end of the heat exchanger tube 7
It is connected to the heating agent entrance pipeline section 3 in the upper cavity of the shell 1 and through the hose 8, the heat exchanger tube 7 goes out
Mouth end is located in the lower chamber of the shell 1 and is connected to the heating agent outlet pipe section 4 by another hose 8；The arteries and veins
Hydrodynamic force actuators 13 include top cover 13-1, pedestal 13-2, diaphragm 13-3, rigid rod structure 13-4 and reset spring 13-5,
The pedestal 13-2 is fixed on the shell 1, and the diaphragm 13- is equipped between the top cover 13-1 and the pedestal 13-2
3, the pedestal 13-2 are equipped with the hole for being connected to the diaphragm 13-3, and one end of the rigid rod structure 13-4 passes through the top cover
13-1 is withstood on the diaphragm 13-3, and the outlet end of the other end and the heat exchanger tube 7 is fixed, the rigid rod structure 13-4 with
The reset spring 13-5 is additionally provided between the top cover 13-1；The self-oscillation device 12 includes front nozzle 12-1, oscillation
Chamber 12-2, rear nozzle 12-3, outlet(discharge) flange 12-4 and pipeline 12-5 is flanked, the front nozzle 12-1 and the rear nozzle 12-3
Between be equipped with the oscillation chamber 12-2, the rear nozzle 12-3 is connected to the pedestal 13-2's by the outlet(discharge) flange 12-4
Hole and it is described flank pipeline 12-5, the front nozzle 12-1 passes through heating agent described in the pipeline connection for being equipped with the flow-limiting valve 10
Outlet pipe section 4.
As shown in Figures 2 and 3, the arrival end of the flow-limiting valve 10 is connect by pipeline I 9 with the heating agent outlet pipe section,
The outlet end of the flow-limiting valve 10 is connect by pipeline II 11 with the front nozzle 12-1.
The shape of the shell 1 is cuboid, and the hole of the partition 2 is circular hole, the verge of opening of the partition 2 with it is described
The unilateral gap of heat exchanger tube 7 is 10-20mm.
As shown in figure 4, the oscillation chamber 12-2 is helmholtz resonance chamber, the diameter of the front nozzle 12-1 is less than described
The diameter of rear nozzle 12-3, the front nozzle 12-1, the hole of the rear nozzle 12-3 and the pedestal 13-2 are coaxial.
As shown in Fig. 4, Fig. 9 and 11, the rigid rod structure 13-4 includes vertical bar and the round tube that vertical bar top is arranged in, institute
The outlet end that round tube is sleeved on the heat exchanger tube 7 is stated, the other end of the vertical bar is equipped with flange, the reset spring 13-5 set
On the vertical bar, one end withstands on the other end on the flange of the vertical bar and withstands on the top cover 13-1.
As shown in Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9 and Figure 10, the pedestal 13-2 includes upper flange and lower flange, thereon method
The end face of blue side is recessed inner concave, and the pedestal 13-2 is mounted on the shell 1 by its lower flange, the top
The lid edge 13-1 is equipped with the mounting flange to match with the upper flange of the pedestal 13-2, is equipped with hole in the middle part of the top cover 13-1,
The mounting flange of top cover 13-1, the edge mounting hole of the diaphragm 13-3 and the pedestal 13- described in screw bolt passes are installed
2 upper flange and fixation, the diaphragm 13-3 rest part is tightly fitted on the inner concave of pedestal 13-2.
As shown in Fig. 2, the heating agent entrance pipeline section 3, the heating agent outlet pipe section 4 penetrate the shell 1 and with it is described
Shell 1 welds.
As shown in figure 5, the heat exchanger tube 7 uses stainless steel material, arranged in coiled.
The coil pipe internal diameter of the heat exchanger tube 7 is 20mm, and wall thickness 2mm, spiral linear diameter is 100mm, and circle number is that 10 screw pitch are
20mm。
A kind of working method of the volumetric heat exchanger of self-pulsating enhanced heat exchange of the invention, comprises the concrete steps that:
Step 1: thermal medium enters the heat exchanger tube 7 through the heating agent entrance pipeline section 3, coolant media is through the refrigerant
Entrance pipeline section 5 enters the shell 1, and thermal medium transfers heat to coolant media by the heat exchanger tube 7；
Step 2: from the thermal medium of pipe 7 out that changes after the heating agent outlet pipe section 4 outflow, through described
Flow-limiting valve 10 reaches the front nozzle 12-1, when the flow velocity of thermal medium reaches the limit value of the flow-limiting valve 10, the limit
Stream valve 10 is automatically closed, to generate controllable fluid pressure pulse, the flowing in pipeline is in reversing current feature, destroys heat
The heat transfer coefficient of the heat exchanger tube 7 and scale suppression and scale removal are improved in boundary layer of the medium on 7 inner wall of heat exchanger tube；
Step 3: working as restriction of the flow velocity in the flow-limiting valve 10 of the thermal medium flowed out from the heating agent outlet pipe section 4
When value is following, enter the oscillation chamber 12-2 by the front nozzle 12-1, when unstable the disturbing of front nozzle 12-1 generation
Dynamic wave generates fluid self-oscillation, forms pulsing jet at the rear nozzle 12-3 when passing through the oscillation chamber 12-2；
Specifically when the front nozzle 12-1 unstable perturbation wave generated is passing through the shear layer in the oscillation chamber 12-2
When, shear layer has selection amplification to it, forms collar vortex structure, and collar vortex vibrates the interior of chamber 12-2 with described in shear flow
Wall is hit, and is generated pressure disturbance wave in collision area and is upstream reflected, induces new disturbance at the shear layer separation of upstream,
New perturbation pressure and original disturbance mutually constantly excitation, the oscillation chamber 12-2 is interior just to generate fluid self-oscillation, the spray after described
Mouth 12-3 forms pulsing jet.
Step 4: the pulsing jet come out from the rear nozzle 12-3 impacts the pulsation along the outlet(discharge) flange 12-4
The diaphragm 13-3 in hydraulic transmission system 13, film under the action of pulsing jet and the reset spring 13-5
Piece 13-3 pumps, and then causes described change by the rigid rod structure 13-4 being bonded with the diaphragm 13-3
Heat pipe 7 it is of reciprocating vibration, and then in the shell 1 carry out heat exchange thermal medium and coolant media cause pulsation interfere,
The boundary layer for effectively destroying coolant media and thermal medium, increases fluid turbulent degree inside and outside the heat exchanger tube 7, improves
Convection transfer rate, and it is able to suppress 1 internal incrustation of the heat exchanger tube 7 and the shell, it is heavy to reduce 1 bottom of shell
Starch, last thermal medium flanks pipeline 12-5 outflow from described, and the refrigerant being heated is worth from the refrigerant exit pipeline section
6 outflows.
Between 1.5m/s~3m/s, temperature exists the flow velocity of the above-mentioned thermal medium flowed into from the heating agent entrance pipeline section 3
Between 55 DEG C to 90 DEG C, the limit value of the flow-limiting valve 10 is between 3-3.5m/s.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (10)
1. a kind of volumetric heat exchanger of self-pulsating enhanced heat exchange, it is characterised in that: including shell (1), partition (2), heating agent
Entrance pipeline section (3), heating agent outlet pipe section (4), refrigerant inlet pipeline section (5), refrigerant exit pipeline section (6), heat exchanger tube (7), hose
(8), flow-limiting valve (10), self-oscillation device (12) and pulsation hydraulic transmission system (13)；Be equipped in the shell (1) it is described every
Plate (2), the partition (2) are equipped with hole, and the shell (1) is separated into two cavitys up and down, the epicoele by the partition (2)
Body is connected to the lower chamber by the hole on the partition (2), and the refrigerant exit pipeline section (6) is connected to the shell (1)
Upper cavity, the refrigerant inlet pipeline section (5) are connected to the lower chamber of the shell (1), and the heat exchanger tube (7) passes through the partition
(2) hole, the arrival end of the heat exchanger tube (7) are located in the upper cavity of the shell (1) and are connected to institute by the hose (8)
Heating agent entrance pipeline section (3) is stated, the outlet end of the heat exchanger tube (7) is located in the lower chamber of the shell (1) and by another
The hose (8) is connected to the heating agent outlet pipe section (4)；The pulsation hydraulic transmission system (13) includes top cover (13-1), bottom
Seat (13-2), diaphragm (13-3), rigid rod structure (13-4) and reset spring (13-5), the pedestal (13-2) are fixed on described
On shell (1), it is equipped with the diaphragm (13-3) between the top cover (13-1) and the pedestal (13-2), the pedestal (13-2)
Equipped with the hole for being connected to the diaphragm (13-3), one end of the rigid rod structure (13-4) passes through the top cover (13-1) and withstands on institute
It states on diaphragm (13-3), the other end and the outlet end of the heat exchanger tube (7) are fixed, the rigid rod structure (13-4) and the top
The reset spring (13-5) is additionally provided between lid (13-1)；The self-oscillation device (12) includes front nozzle (12-1), vibration
Swing chamber (12-2), rear nozzle (12-3), outlet(discharge) flange (12-4) and flank pipeline (12-5), the front nozzle (12-1) with it is described
The oscillation chamber (12-2) is equipped between rear nozzle (12-3), the rear nozzle (12-3) is connected by the outlet(discharge) flange (12-4)
Lead to the pedestal (13-2) hole and it is described flank pipeline (12-5), the front nozzle (12-1) pass through be equipped with the flow-limiting valve
(10) heating agent outlet pipe section (4) described in pipeline connection.
2. a kind of volumetric heat exchanger of self-pulsating enhanced heat exchange according to claim 1, it is characterised in that: the shell
The shape of body (1) is cuboid, and the hole of the partition (2) is circular hole, the verge of opening and the heat exchanger tube of the partition (2)
(7) unilateral gap is 10-20mm.
3. a kind of volumetric heat exchanger of self-pulsating enhanced heat exchange according to claim 1, it is characterised in that: the vibration
Swinging chamber (12-2) is helmholtz resonance chamber, and the diameter of the front nozzle (12-1) is less than the diameter of the rear nozzle (12-3),
The front nozzle (12-1), the rear nozzle (12-3) and the hole of the pedestal (13-2) are coaxial.
4. a kind of volumetric heat exchanger of self-pulsating enhanced heat exchange according to claim 1, it is characterised in that: described rigid
Property rod structure (13-4) include vertical bar and the round tube that vertical bar top is set, the round tube is sleeved on going out for the heat exchanger tube (7)
The other end at mouth end, the vertical bar is equipped with flange, and the reset spring (13-5) is sleeved on the vertical bar, and one end withstands on institute
The other end on the flange of vertical bar is stated to withstand on the top cover (13-1).
5. a kind of volumetric heat exchanger of self-pulsating enhanced heat exchange according to claim 1, it is characterised in that: the bottom
Seat (13-2) includes upper flange and lower flange, and the end face of upper flange side is recessed inner concave, and the pedestal (13-2) is logical
It crosses its lower flange to be mounted on the shell (1), the top cover edge (13-1) is equipped with the upper flange with the pedestal (13-2)
The mounting flange to match, top cover (13-1) middle part are equipped with hole, install the peace of top cover (13-1) described in screw bolt passes
Fill flange, the diaphragm (13-3) edge mounting hole and the pedestal (13-2) upper flange and fixation, the diaphragm (13-
3) rest part is tightly fitted on the inner concave of pedestal (13-2).
6. a kind of volumetric heat exchanger of self-pulsating enhanced heat exchange according to claim 1, it is characterised in that: the heat
Matchmaker's entrance pipeline section (3), the heating agent outlet pipe section (4) penetrate the shell (1) and weld with the shell (1).
7. a kind of volumetric heat exchanger of self-pulsating enhanced heat exchange according to claim 1, it is characterised in that: described to change
Heat pipe (7) uses stainless steel material, arranges in coiled.
8. a kind of volumetric heat exchanger of self-pulsating enhanced heat exchange according to claim 1, it is characterised in that: described to change
The coil pipe internal diameter of heat pipe (7) is 20-30mm, and wall thickness 2-3mm, spiral linear diameter is 100-200mm, encloses number as 5-15 circle, screw pitch
For 20-40mm.
9. according to claim 1 to a kind of work of the volumetric heat exchanger of self-pulsating enhanced heat exchange described in 8 any one
Method, which is characterized in that comprise the concrete steps that:
Step 1: thermal medium enters the heat exchanger tube (7) through the heating agent entrance pipeline section (3), coolant media is through the refrigerant
Entrance pipeline section (5) enters the shell (1), and thermal medium transfers heat to coolant media by the heat exchanger tube (7)；
Step 2: from the thermal medium that the heat exchanger tube (7) come out after the heating agent outlet pipe section (4) outflow, through the limit
It flows valve (10) and reaches the front nozzle (12-1), when the flow velocity of thermal medium reaches the limit value of the flow-limiting valve (10), institute
It states flow-limiting valve (10) to be automatically closed, to generate controllable fluid pressure pulse, the flowing in pipeline is in reversing current feature, is destroyed
Boundary layer of the thermal medium on the heat exchanger tube (7) inner wall is improved the heat transfer coefficient of the heat exchanger tube (7) and scale suppression and is removed
Dirt；
Step 3: working as restriction of the flow velocity in the flow-limiting valve (10) of the thermal medium flowed out from the heating agent outlet pipe section (4)
When value is following, enter the oscillation chamber (12-2) by the front nozzle (12-1), when the front nozzle (12-1) is generated not
Stable Perturbation wave generates fluid self-oscillation, is formed at the rear nozzle (12-3) when passing through oscillation chamber (12-2)
Pulsing jet；
Step 4: the pulsing jet come out from the rear nozzle (12-3) impacts the pulsation along the outlet(discharge) flange (12-4)
The diaphragm (13-3) in hydraulic transmission system (13), in pulsing jet and the reset spring (13-5) under the action of institute
It states diaphragm (13-3) to pump, then be made by the rigid rod structure (13-4) being bonded with the diaphragm (13-3)
It is made at the of reciprocating vibration of the heat exchanger tube (7), and then to the thermal medium and coolant media of progress heat exchange in the shell (1)
It is interfered at pulsation, effectively destroys the boundary layer of coolant media and thermal medium, it is rapid to increase the interior outer fluid of the heat exchanger tube (7)
Mobility improves convection transfer rate, and is able to suppress the heat exchanger tube (7) and the shell (1) internal incrustation, reduces institute
State shell (1) bottom sediment, last thermal medium flanks pipeline (12-5) outflow from described, and the refrigerant value being heated from
Refrigerant exit pipeline section (6) outflow.
10. a kind of working method of the volumetric heat exchanger of self-pulsating enhanced heat exchange according to claim 9, feature
Be: between 1.5m/s~3m/s, temperature arrives the flow velocity of the thermal medium flowed into from the heating agent entrance pipeline section (3) at 55 DEG C
Between 90 DEG C, the limit value of the flow-limiting valve (10) is between 3-3.5m/s.
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