CN102679770A - 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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- CN102679770A CN102679770A CN2012101455698A CN201210145569A CN102679770A CN 102679770 A CN102679770 A CN 102679770A CN 2012101455698 A CN2012101455698 A CN 2012101455698A CN 201210145569 A CN201210145569 A CN 201210145569A CN 102679770 A CN102679770 A CN 102679770A
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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 type pulsating flow intensified heat transmission heat exchanger of augmentation of heat transfer.
Background technology
In the commercial production, because of thermal energy transfer, exchange, conversion and control etc. need, heat exchanger is adopted by a large amount of, wherein uses the most general with shell-and-tube heat exchanger again.In order to improve the enhanced heat exchange coefficient, the scientific worker studies from managing the interior many aspects such as eddy flow original paper, vibrating enhanced heat transfer, electric field-enhanced heat transfer and change heat exchanger tube shape of inserting both at home and abroad.This type of reinforcement is the most extensive with structure-reinforced technical application at present, and inserting the eddy flow original paper is main to insert silk ribbon and spring to drive flow disturbance mainly, and it is main that fluid all flows with constant voltage.How to use clocklike fluid pressure pulses and come enhance heat transfer Research on effect and 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, dispels the heat efficiently and heat transmission function through it, has solved the thermal boundary bottleneck in a lot of fields and the consumption that reduces the energy greatly.These have all explained important application background and researching value that pulsating flow conducts heat.This seminar is carrying out national natural science fund subsidy project " the vibrating enhanced heat-transfer mechanism research of tubular heat exchanger flow-induced " research (NO.50976080) at present; This subject study also relates to pulsating flow, is exactly an important content of this subject study so obtain pulsating flow.The domestic patent No. is the pulsating flow generator of " 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 inadequately.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 type pulsating flow intensified heat transmission heat exchanger that proposes; It can regulate the amplitude and the frequency of pulsating flow simultaneously; Through 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 scheme that problem adopted that the present invention solves above-mentioned proposition is: adjustable reciprocating type 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 the tube sheet, it is characterized in that the tube side inlet on the side seal head wherein is connected with reciprocating type pulsating flow generating means, regulates its amplitude and frequency through the rotating speed and the flow of its place branch road of regulating reciprocating type pulsating flow generating means; Described reciprocating type 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 first stop valve and frequency modulation tubing pump, and first stop valve, one end is connected with water tank, and the other end links to each other with the frequency modulation tubing pump; The frequency modulation tubing pump is used to provide the output constant-pressure fluid, and first stop valve is used to regulate the size of output branch road I output flow;
Described output branch road II comprises second stop valve, reciprocating type pulsating flow generator and check-valves; Second stop valve, one end is connected with water tank; The other end is connected with reciprocating type pulsating flow generator; Second stop valve is used to regulate the size of output branch road II output flow, and check-valves links to each other with reciprocating type pulsating flow generator, is used for preventing that the fluid of exporting the branch road I from getting into output branch road II;
Described output branch road I links to each other with two interfaces of output branch road II through threeway, and another interface of threeway links to each other with the main road III, and output branch road I flows into the main road III with the fluid of output branch road II, thus output ripple stream.
Press such scheme; Described reciprocating type pulsating flow generator includes frequency modulation motor, piston crank mechanism and pumping cylinder, and the piston rod of described piston crank mechanism links to each other with the output of frequency modulation motor, and 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 second stop valve, one side, come the variation of regulating frequency, and the length of piston displacement in pumping cylinder and stop valve are regulated oscillation amplitude change through frequency modulation motor.In the reciprocating motion process, realize the change that inlet valve and dump valve " gradually leave-gradually close-gradually open ", thereby realize the output ripple fluid, the rotating speed adjustable of frequency modulation motor is regulated ripple frequency through this.
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) regulate steady state flow through output branch road I; Output branch road II obtains pulsating flow; And regulate rotating speed of motor and 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 through go into to be equipped with the pipeline of reciprocating type pulsating flow generator in the tube side termination; Its version has been carried out 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.
Description of drawings
Fig. 1 is a structural representation of the present invention
1 end socket among the figure, the outlet of 2 tube sides, 3 tube sheets, 4 housings, 5 heat exchanger tubes; The outlet of 6 shell sides, 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 done further explanation.
Adjustable reciprocating type 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, and the arrival end of heat exchanger tube is fixed on the tube sheet, also are provided with shell side outlet 6 on the housing; It is characterized in that the tube side inlet (the opposite side end socket is provided with tube side outlet 2) on the side seal head wherein is connected with reciprocating type pulsating flow generating means; Rotating speed through regulating reciprocating type pulsating flow generating means is regulated its amplitude and frequency with the flow of its place branch road, and described reciprocating type pulsating flow generating means includes water tank 17, output branch road I 18, output branch road II 8 and main road III 7, and the mouth of pipe sectional area of the pipeline of described output branch road I 18, output branch road II 8 and main road III 7 is identical; Therefore; Flow velocity in the main road III 7 is the flow velocity sum of output branch road I 18 with output branch road II 8, and the flow direction of fluid is shown in arrow among the figure
Wherein, Described output branch road I 18 comprises first stop valve 19 and frequency modulation tubing pump 20; First stop valve, 19 1 ends are connected with water tank; The other end links to each other with frequency modulation tubing pump 20, and frequency modulation tubing pump 20 is used to provide the output constant-pressure fluid, and first stop valve 19 is used to regulate the size of output branch road I output flow;
Described output branch road II 8 comprises second stop valve 16, reciprocating type pulsating flow generator and check-valves 9; Second stop valve, 16 1 ends are connected with water tank; The other end is connected with reciprocating type pulsating flow generator; Second stop valve 16 is used to regulate the size of output branch road II 8 output flows, and check-valves 9 links to each other with reciprocating type pulsating flow generator, is used for preventing that the fluid of exporting branch road I 18 from getting into output branch road II 8; Described reciprocating type pulsating flow generator includes frequency modulation motor 15, piston crank mechanism and pumping cylinder 11; The piston rod 13 of described piston crank mechanism links to each other 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 second stop valve, 16 1 sides, come the variation of regulating frequency, and the length of piston 12 displacement in pumping cylinder 11 and second stop valve 16 are regulated oscillation amplitude change through frequency modulation motor.In the reciprocating motion process, realize the change that inlet valve 14 and dump valve 10 " gradually leave-gradually close-gradually open ", thereby realize the output ripple fluid, the rotating speed adjustable of frequency modulation motor is regulated ripple frequency through this.
Described output branch road I 18 links to each other with two interfaces of output branch road II 8 through threeway, and another interface of threeway links to each other with main road III 7, and output branch road I 18 flows into main road III 7 with the fluid of output branch road II 8, thus output ripple stream.
Operation principle of the present invention is: as far as 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, after the fluid of these two branch roads flowed in each heat exchanger tube by end socket, the pulse change of fluid pressure will cause fluid turbulent reinforcement in the tube side; Thereby heat-transfer effect is strengthened; Because the pulse change of fluid pressure for producing whirlpool near pipe layer internal face vicinity, has strengthened the disturbance of fluid greatly, reduced the thickness in boundary layer simultaneously; Simultaneously the pulse change of fluid pressure pair can produce denudation with the schmutzband of shell side internal face, thereby can reach the effect of scale suppression and scale removal; As far as shell side, mainly by behind the pulsating flow generator output pressure pulsating flow, the pulse change of fluid pressure directly can make fluid turbulent enhancing in the shell side to shell side porch changes in flow rate, reaches the effect of augmentation of heat transfer, scale suppression and scale removal.
Pulsating flow of the present invention produces as follows: the fluid of constant voltage at first is provided by frequency modulation tubing pump 20, through the flow size that first stop valve 19 just can be regulated fluid in the output branch road I 18, just regulates the pressure size of constant-pressure fluid.8 of output branch road II are the reciprocating motions that converts rotatablely moving of frequency modulation motor 15 to through toggle piston 12; When piston rod 13 drive pistons 12 move right; The volume of pumping cylinder 11 increases and formation low pressure; Dump valve 10 receives fluid pressure effect in the discharge pipe and cuts out, and inlet valve 14 receives the differential pressure action in water tank level and the pumping cylinder and opens, and makes liquid suction pumping cylinder 11.When piston 12 was moved to the left, because the pushing of piston, fluid pressure increased in the pumping cylinder 11; Thereby make suction valve closure, dump valve is opened, and makes liquid discharge pumping cylinder 11; Accomplish the circulation of a job; Drive piston 12 through piston rod 13 and in pumping cylinder, move reciprocatingly, realize the continuous suction and the discharge of fluid, thereby the pressure pulse that forms fluid changes; The frequency of pulsating flow mainly relies on the rotating speed of frequency control motor 15 to regulate, and the amplitude of pulsating flow then leans on the length and second stop valve, 16 comprehensive adjustment of piston 12 two ends displacement in pumping cylinder 11.So flow into main road III 7 when the fluid of exporting branch road I 18 and output branch road II 8 converges, feed then 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 installed in the reciprocating motion of the pistons on the reciprocating type pulse stream generator; The discharge opeing periodic breaks is carried out, and its instantaneous delivery is inhomogeneous, thereby has formed half-wave shape curve.Reciprocating type pulse stream generator is equipped with the variation of frequency control motor and piston crank mechanism drive piston move left and right distance in pumping cylinder, can realize amplitude A and the big or small variation of frequency n in fluid flow and fluid pressure periodicity sine wave or the periodicity triangular wave characteristic.
Claims (3)
1. adjustable reciprocating type 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 the tube sheet, it is characterized in that the tube side inlet on the side seal head wherein is connected with reciprocating type pulsating flow generating means, regulates its amplitude and frequency through the rotating speed and the flow of its place branch road of regulating reciprocating type pulsating flow generating means; Described reciprocating type 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 first stop valve (19) and frequency modulation tubing pump (20); First stop valve (19) one ends are connected with water tank; The other end links to each other with frequency modulation tubing pump (20), and frequency modulation tubing pump (20) is used to provide the output constant-pressure fluid, and first stop valve (19) is used to regulate the size of output branch road I output flow;
Described output branch road II (8) comprises second stop valve (16), reciprocating type pulsating flow generator and check-valves (9); Second stop valve (16) one ends are connected with water tank; The other end is connected with reciprocating type pulsating flow generator; Second stop valve (16) is used for regulating the size of output branch road II (8) output flow, and check-valves (9) links to each other with reciprocating type pulsating flow generator, is used for preventing that the fluid of exporting branch road I (18) from getting into output branch road II (8);
Described output branch road I (18) links to each other with two interfaces of output branch road II (8) through threeway, and another interface of threeway links to each other 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.
2. by the described adjustable reciprocating type pulsating flow intensified heat transmission heat exchanger of claim 1; It is characterized in that described reciprocating type pulsating flow generator includes frequency modulation motor (15), piston crank mechanism and pumping cylinder (11); The piston rod of described piston crank mechanism (13) links to each other 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 second stop valve (16) one sides, come the variation of regulating frequency, and the length of piston (12) displacement in pumping cylinder (11) and stop valve (16) are regulated oscillation amplitude change through frequency modulation motor.
3. by claim 1 or 2 described adjustable reciprocating type pulsating flow intensified heat transmission heat exchangers, 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 true CN102679770A (en) | 2012-09-19 |
| CN102679770B CN102679770B (en) | 2013-12-11 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104930880A (en) * | 2015-06-06 | 2015-09-23 | 浙江工业大学 | Pulsating flow shell-and-tube heat exchanger and heat exchange method thereof |
| 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 |
| CN109990506A (en) * | 2019-04-09 | 2019-07-09 | 山东大学 | A kind of pulsation heat exchanger and its deep well heat exchanging system |
| CN110926061A (en) * | 2019-04-09 | 2020-03-27 | 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 |
| CN115128120A (en) * | 2022-05-09 | 2022-09-30 | 天津大学 | Micro-scale enhanced heat transfer device utilizing viscoelastic fluid pulsating flow resonance effect |
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| 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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2012
- 2012-05-11 CN CN2012101455698A patent/CN102679770B/en not_active Expired - Fee Related
Patent Citations (4)
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| 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 |
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| CN201429364Y (en) * | 2009-01-21 | 2010-03-24 | 武汉工程大学 | Pulsating flow heat transfer enhancing heat exchanger |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104930880A (en) * | 2015-06-06 | 2015-09-23 | 浙江工业大学 | Pulsating flow shell-and-tube heat exchanger and heat exchange method thereof |
| 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 |
| CN109990506A (en) * | 2019-04-09 | 2019-07-09 | 山东大学 | A kind of pulsation heat exchanger and its deep well heat exchanging system |
| CN110926061A (en) * | 2019-04-09 | 2020-03-27 | 山东大学 | Noise-controlled deep well mining refrigeration system |
| 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 |
| CN115128120A (en) * | 2022-05-09 | 2022-09-30 | 天津大学 | Micro-scale enhanced heat transfer device utilizing viscoelastic fluid pulsating flow resonance effect |
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| CN102679770B (en) | 2013-12-11 |
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