CN102679770B - Adjustable reciprocating pulsating flow reinforced heat transfer heat exchanger - Google Patents
Adjustable reciprocating pulsating flow reinforced heat transfer heat exchanger Download PDFInfo
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- CN102679770B CN102679770B CN2012101455698A CN201210145569A CN102679770B CN 102679770 B CN102679770 B CN 102679770B CN 2012101455698 A CN2012101455698 A CN 2012101455698A CN 201210145569 A CN201210145569 A CN 201210145569A CN 102679770 B CN102679770 B CN 102679770B
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Abstract
The invention relates to an adjustable reciprocating pulsating flow reinforced heat transfer heat exchanger, which comprises a shell, end enclosures, tube plates and a heat exchange pipe, wherein two ends of the shell are respectively connected with the end enclosures on two sides by the tube plates, and the inlet ends of the heat exchange pipe are fixed on the tube plates. The heat exchanger is characterized in that the tube pass inlet of the end enclosure on one side is connected with a reciprocating pulsating flow generating device, and the amplitude and the frequency of the reciprocating pulsating flow generating device are adjusted by adjusting the rotating speed of the device and the flow rate of a branch where the device is located. The heat exchanger has the advantages that 1) the steady-state flow rate is adjusted through an output branch I, an output branch II acquires pulsating flow rate, and the average flow rate, the pulsating frequency and the pulsating amplitude of the pulsating flow in a main path III can be adjusted by adjusting the rotating speed of a motor so as to obtain pulsating flow with research value; and 2) reinforced heat transfer, scale inhibition and scale removal of the conventional heat exchanger can be realized by simply improving the structural form of the heat exchanger, and the heat exchanger is simple in structure and easy to implement.
Description
Technical field
The present invention relates to a kind of shell-and-tube heat exchanger, concrete a kind of reciprocating pump that utilizes that relates to produces pressure fluctuation stream, in order to the adjustable reciprocating pulsating flow intensified heat transmission heat exchanger of augmentation of heat transfer.
Background technology
In industrial production, because thermal energy transfer, exchange, conversion and control etc. need, heat exchanger is adopted in a large number, wherein general with the shell-and-tube heat exchanger application again.In order to improve the enhanced heat exchange coefficient, the scientific worker is studied from managing the many aspects such as interior insertion eddy flow original paper, vibrating enhanced heat transfer, electric field-enhanced heat transfer and change heat exchanger tube shape both at home and abroad.This type of strengthening is most widely used with structure-reinforced technology at present, inserts the eddy flow original paper and mainly to insert silk ribbon and spring, take and drive flow disturbance as main, and fluid all be take constant voltage and flowed as main.How to apply regular fluid pressure pulses and strengthen the research of heat-transfer effect few, also do not propose effective version.Pulsating Flow conducts heat as a kind of novel heat transfer technology, and main research concentrates on biology, information and nanometer technology, by it, dispels the heat efficiently and heat transmission function, has solved the thermal boundary bottleneck in a lot of fields and the consumption that greatly reduces the energy.These have all illustrated important application background and researching value that Pulsating Flow conducts heat.This seminar is carrying out national natural science fund subsidy project " research of tubular heat exchanger Augmented Heat Transfer of Elastic Coiled Tube Bundles by Flow Induced Vibration mechanism " research (NO.50976080) at present, this subject study also relates to Pulsating Flow, so obtain Pulsating Flow, is exactly an important content of this subject study.The pulsating flow generator that the domestic patent No. is " CN200910060614.8 ", can only regulate fluid and periodically change, and can not realize the adjusting of pulse amplitude, and the fluid periodically pulsing that this Pulsating Flow generating means produces is accurate not.Based on this, seeking to solve the pulsating flow intensified heat transmission heat exchanger of regulating Pulsating Flow frequency and amplitude becomes the emphasis that the research Pulsating Flow conducts heat.
Summary of the invention
Subject matter to be solved by this invention all is based on above-mentioned prior art and a kind of adjustable reciprocating pulsating flow intensified heat transmission heat exchanger of proposing, it can regulate amplitude and the frequency of Pulsating Flow simultaneously, by the variation of amplitude and frequency, can effectively utilize fluid pressure pulses to change the effect that strengthens disturbance and play augmentation of heat transfer and scale removal.
The present invention solves the scheme that the problem of above-mentioned proposition adopts: the adjustable reciprocating pulsating flow intensified heat transmission heat exchanger, include housing, end socket, tube sheet and heat exchanger tube, the housing two ends are connected with the both sides end socket by tube sheet respectively, the arrival end of heat exchanger tube is fixed on tube sheet, it is characterized in that the tube side entrance on a side seal head wherein is connected with reciprocating Pulsating Flow generating means, rotating speed by regulating reciprocating Pulsating Flow generating means and the flow of its place branch road are regulated its amplitude and frequency, described reciprocating Pulsating Flow generating means includes water tank, output branch road I, output branch road II and main road III,
Wherein, described output branch road I comprises the first stop valve and frequency modulation tubing pump, and the first stop valve one end is connected with water tank, and the other end is connected with the frequency modulation tubing pump, the frequency modulation tubing pump is for providing the output constant-pressure fluid, and the first stop valve is for the size of regulation output branch road I output flow;
Described output branch road II comprises the second stop valve, reciprocating pulsating flow generator and check-valves, the second stop valve one end is connected with water tank, the other end is connected with reciprocating pulsating flow generator, the second stop valve is for the size of regulation output branch road II output flow, check-valves is connected with reciprocating pulsating flow generator, for preventing the fluid of exporting the branch road I, enters output branch road II;
Described output branch road I is connected with two interfaces of output branch road II by threeway, and another interface of threeway is connected with the main road III, and the fluid of output branch road I and output branch road II flows into the main road III, thus output ripple stream.
Press such scheme, described reciprocating pulsating flow generator includes frequency modulation motor, piston crank mechanism and pumping cylinder, the piston rod of described piston crank mechanism is connected with the output of frequency modulation motor, the piston of piston crank mechanism matches with pumping cylinder, pumping cylinder is provided with dump valve near check-valves one side, be provided with inlet valve near the second stop valve one side, carry out the variation of regulating frequency by frequency modulation motor, and the variation of the length of piston displacement in pumping cylinder and stop valve adjusting amplitude.Realize the change that inlet valve and dump valve " gradually leave-gradually close-gradually open " in the reciprocating motion process, thereby realize the output ripple fluid, the rotating speed of frequency modulation motor is adjustable, by this, regulates ripple frequency.
Press such scheme, the mouth of pipe sectional area of described output branch road I, output branch road II and the pipeline of main road III is identical.Therefore, the flow velocity in the main road III is the flow velocity sum of output branch road I and output branch road II.
The invention has the advantages that: 1) by output branch road I, regulate steady state flow, output branch road II obtains pulsating flow, and the rotating speed of regulating motor can realize the adjusting to mean flow rate, ripple frequency and the pulse amplitude of Pulsating Flow in the main road III, obtain the Pulsating Flow of researching value.2) on traditional shell-and-tube heat exchanger by enter to be equipped with the pipeline of reciprocating pulsating flow generator in the tube side termination, its version has been carried out to simple improvement, just can realize augmentation of heat transfer, scale suppression and the scale removal of traditional heat exchangers, and simple in structure, be easy to realize.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention
1 end socket in figure, 2 tube side outlets, 3 tube sheets, 4 housings, 5 heat exchanger tubes, 6 shell side outlets, 7 main road III, 8 output branch road II, 9 check-valves, 10 dump valves, 11 pumping cylinders, 12 pistons, 13 piston rods, 14 inlet valves, 15 frequency modulation motors, 16 second stop valves, 17 water tanks, 18 output branch road I, 19 first stop valves, 20 frequency modulation tubing pumps.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
The adjustable reciprocating pulsating flow intensified heat transmission heat exchanger, include housing 4, end socket 1, tube sheet 3 and heat exchanger tube 5, the housing two ends are connected with the both sides end socket by tube sheet respectively, the arrival end of heat exchanger tube is fixed on tube sheet, also be provided with shell side outlet 6 on housing, it is characterized in that the tube side entrance (being provided with tube side outlet 2 on the opposite side end socket) on a side seal head wherein is connected with reciprocating Pulsating Flow generating means, rotating speed by regulating reciprocating Pulsating Flow generating means and the flow of its place branch road are regulated its amplitude and frequency, described reciprocating Pulsating Flow generating means includes water tank 17, output branch road I 18, output branch road II 8 and main road III 7, described output branch road I 18, the mouth of pipe sectional area of the pipeline of output branch road II 8 and main road III 7 is identical, therefore, flow velocity in main road III 7 is the flow velocity sum of output branch road I 18 and output branch road II 8, the flow direction of fluid as shown by arrows in FIG.,
Wherein, described output branch road I 18 comprises the first stop valve 19 and frequency modulation tubing pump 20, the first stop valve 19 1 ends are connected with water tank, the other end is connected with frequency modulation tubing pump 20, frequency modulation tubing pump 20 is for providing the output constant-pressure fluid, and the first stop valve 19 is for the size of regulation output branch road I output flow;
Described output branch road II 8 comprises the second stop valve 16, reciprocating pulsating flow generator and check-valves 9, the second stop valve 16 1 ends are connected with water tank, the other end is connected with reciprocating pulsating flow generator, the second stop valve 16 is for the size of regulation output branch road II 8 output flows, check-valves 9 is connected with reciprocating pulsating flow generator, for preventing the fluid of exporting branch road I 18, enters output branch road II 8; Described reciprocating pulsating flow generator includes frequency modulation motor 15, piston crank mechanism and pumping cylinder 11, the piston rod 13 of described piston crank mechanism is connected with the output of frequency modulation motor, the piston 12 of piston crank mechanism matches with pumping cylinder, pumping cylinder is provided with dump valve 10 near check-valves 9 one sides, be provided with inlet valve 14 near the second stop valve 16 1 sides, carry out the variation of regulating frequency by frequency modulation motor, and piston 12 is in the length of pumping cylinder 11 interior displacements and the variation of the second stop valve 16 adjusting amplitudes.Realize the change that inlet valve 14 and dump valve 10 " gradually leave-gradually close-gradually open " in the reciprocating motion process, thereby realize the output ripple fluid, the rotating speed of frequency modulation motor is adjustable, by this, regulates ripple frequency.
Described output branch road I 18 is connected with two interfaces of output branch road II 8 by threeway, and another interface of threeway is connected with main road III 7, and the fluid of output branch road I 18 and output branch road II 8 flows into main road III 7, thus output ripple stream.
Operation principle of the present invention is: for tube side, tube side porch changes in flow rate is mainly by pulsating flow generator output pressure Pulsating Flow, and then add that the fluid average discharge that another branch road provides realizes, when the fluid of these two branch roads is flowed in each heat exchanger tube by end socket after, the pulse change of fluid pressure will cause fluid turbulent reinforcement in tube side, thereby heat-transfer effect is strengthened, pulse change due to fluid pressure produces a whirlpool for close pipe layer internal face vicinity simultaneously, greatly strengthened the disturbance of fluid, reduced the thickness in boundary layer, the pulse change pair of fluid pressure can produce denudation with the schmutzband of shell side internal face simultaneously, thereby can reach the effect of scale suppression and scale removal, for shell side, shell side porch changes in flow rate is mainly by after pulsating flow generator output pressure Pulsating Flow, and the pulse change of fluid pressure directly can make fluid turbulent enhancing in shell side, reaches the effect of augmentation of heat transfer, scale suppression and scale removal.
Pulsating Flow of the present invention produces as follows: at first the fluid of constant voltage is provided by frequency modulation tubing pump 20, by the first stop valve 19 just can regulation output branch road I 18 in the uninterrupted of fluid, namely the pressure size of regulating constant hydraulic fluid.8 of output branch road II are rotatablely moving of frequency modulation motor 15 to be converted to the reciprocating motion of piston 12 by toggle, when piston rod 13 drive pistons 12 move right, the volume of pumping cylinder 11 increases and formation low pressure, dump valve 10 is subject to fluid pressure effect in discharge pipe and cuts out, and inlet valve 14 is subject to the differential pressure action in water tank level and pumping cylinder and opens, make liquid suction pumping cylinder 11.When piston 12 is moved to the left, pushing due to piston, the interior fluid pressure of pumping cylinder 11 increases, thereby make suction valve closure, dump valve is opened, make liquid discharge pumping cylinder 11, complete the circulation of a job, drive piston 12 by piston rod 13 moves reciprocatingly in pumping cylinder, realize continuous suction and the discharge of fluid, thereby the pressure pulse that forms fluid changes, and the frequency of Pulsating Flow mainly relies on the rotating speed of frequency control motor 15 to regulate, the amplitude of Pulsating Flow is length and the second stop valve 16 comprehensive adjustment in the interior two ends of pumping cylinder 11 displacement by piston 12.So converge and flow into main road III 7 with the fluid of exporting branch road II 8 when output branch road I 18, then pass in the middle of tube side, just can realize the variation of heat exchanger tube tube side fluid flow and the periodic adjustment of fluid pressure.
The fluid flow of stream of pulses output of the present invention and fluid pressure are periodicity half-wave curvilinear characteristic, when the fluid flow of output and fluid pressure are the half-wave curve, be arranged on the reciprocating motion of the pistons on reciprocating pulse stream generator, the discharge opeing periodic breaks is carried out, its instantaneous delivery is inhomogeneous, thereby has formed half waveform curve.Reciprocating pulse stream generator is equipped with frequency control motor and piston crank mechanism and drives the variation that piston moves left and right distance in pumping cylinder, can realize the periodically sinusoidal wave or periodically amplitude A in the triangular wave feature and the variation of frequency n size of fluid flow and fluid pressure.
Claims (2)
1. adjustable reciprocating pulsating flow intensified heat transmission heat exchanger, include housing (4), end socket (1), tube sheet (3) and heat exchanger tube (5), the housing two ends are connected with the both sides end socket by tube sheet respectively, the arrival end of heat exchanger tube is fixed on tube sheet, it is characterized in that the tube side entrance on a side seal head wherein is connected with reciprocating Pulsating Flow generating means, rotating speed by regulating reciprocating Pulsating Flow generating means and the flow of its place branch road are regulated its amplitude and frequency, described reciprocating Pulsating Flow generating means includes water tank (17), output branch road I (18), output branch road II (8) and main road III (7),
Wherein, described output branch road I (18) comprises the first stop valve (19) and frequency modulation tubing pump (20), the first stop valve (19) one ends are connected with water tank, the other end is connected with frequency modulation tubing pump (20), frequency modulation tubing pump (20) is for providing the output constant-pressure fluid, and the first stop valve (19) is for the size of regulation output branch road I output flow;
Described output branch road II (8) comprises the second stop valve (16), reciprocating pulsating flow generator and check-valves (9), the second stop valve (16) one ends are connected with water tank, the other end is connected with reciprocating pulsating flow generator, the second stop valve (16) is for the size of regulation output branch road II (8) output flow, check-valves (9) is connected with reciprocating pulsating flow generator, for preventing the fluid of exporting branch road I (18), enters output branch road II (8);
Described output branch road I (18) is connected with two interfaces of output branch road II (8) by threeway, another interface of threeway is connected with main road III (7), the fluid of output branch road I (18) and output branch road II (8) flows into main road III (7), thus output ripple stream;
Described reciprocating pulsating flow generator includes frequency modulation motor (15), piston crank mechanism and pumping cylinder (11), the piston rod of described piston crank mechanism (13) is connected with the output of frequency modulation motor, the piston of piston crank mechanism (12) matches with pumping cylinder, pumping cylinder is provided with dump valve (10) near check-valves (9) one sides, be provided with inlet valve (14) near the second stop valve (16) one sides, carry out the variation of regulating frequency by frequency modulation motor, and the variation of the length of piston (12) displacement in pumping cylinder (11) and stop valve (16) adjusting amplitude.
2. by adjustable reciprocating pulsating flow intensified heat transmission heat exchanger claimed in claim 1, it is characterized in that described output branch road I (18), output branch road II (8) are identical with the mouth of pipe sectional area of the pipeline of main road III (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101455698A CN102679770B (en) | 2012-05-11 | 2012-05-11 | Adjustable reciprocating pulsating flow reinforced heat transfer heat exchanger |
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| CN2012101455698A CN102679770B (en) | 2012-05-11 | 2012-05-11 | Adjustable reciprocating pulsating flow reinforced heat transfer heat exchanger |
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| CN102679770A CN102679770A (en) | 2012-09-19 |
| CN102679770B true CN102679770B (en) | 2013-12-11 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104930880B (en) * | 2015-06-06 | 2017-04-05 | 浙江工业大学 | A kind of pulsation flow tube shell type heat exchanger and its heat-exchange method |
| CN106766549A (en) * | 2016-12-27 | 2017-05-31 | 武昌船舶重工集团有限公司 | A kind of heat-exchange system of ship equipment |
| CN107941076A (en) * | 2017-11-10 | 2018-04-20 | 武汉工程大学 | A kind of high-performance heat exchanger system and its heat-exchange method |
| CN109990506B (en) * | 2019-04-09 | 2020-03-27 | 山东大学 | Pulsating heat exchanger and deep well heat exchange system thereof |
| CN110926061B (en) * | 2019-04-09 | 2020-09-18 | 山东大学 | Noise-controlled deep well mining refrigeration system |
| CN112977782A (en) * | 2021-03-26 | 2021-06-18 | 江苏科技大学 | Pulsating flow enhanced heat exchange ship cooling water system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202907U (en) * | 1985-07-17 | 1986-05-28 | 中国船舶工业总公司第五三研究所 | Switchable indicator for measuring liquid flowrate |
| EP0635694B1 (en) * | 1993-07-22 | 1997-09-10 | L. & C. Steinmüller GmbH | System for cooling a gas which forms deposits |
| CN201344172Y (en) * | 2009-01-21 | 2009-11-11 | 武汉工程大学 | Pulsating flow generator |
| CN201429364Y (en) * | 2009-01-21 | 2010-03-24 | 武汉工程大学 | Pulsating flow heat transfer enhancing heat exchanger |
-
2012
- 2012-05-11 CN CN2012101455698A patent/CN102679770B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202907U (en) * | 1985-07-17 | 1986-05-28 | 中国船舶工业总公司第五三研究所 | Switchable indicator for measuring liquid flowrate |
| EP0635694B1 (en) * | 1993-07-22 | 1997-09-10 | L. & C. Steinmüller GmbH | System for cooling a gas which forms deposits |
| CN201344172Y (en) * | 2009-01-21 | 2009-11-11 | 武汉工程大学 | Pulsating flow generator |
| CN201429364Y (en) * | 2009-01-21 | 2010-03-24 | 武汉工程大学 | Pulsating flow heat transfer enhancing heat exchanger |
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