CN104296578A - Method for controlling size of boiling liquid bubbles - Google Patents
Method for controlling size of boiling liquid bubbles Download PDFInfo
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- CN104296578A CN104296578A CN201410536570.2A CN201410536570A CN104296578A CN 104296578 A CN104296578 A CN 104296578A CN 201410536570 A CN201410536570 A CN 201410536570A CN 104296578 A CN104296578 A CN 104296578A
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- boiling
- gradient
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- size
- magnetic
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- 238000009835 boiling Methods 0.000 title claims abstract description 64
- 239000007788 liquid Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000003795 desorption Methods 0.000 claims abstract description 28
- 230000005484 gravity Effects 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 230000002153 concerted effect Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000003049 inorganic solvent Substances 0.000 claims description 2
- 229910001867 inorganic solvent Inorganic materials 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 4
- 230000001276 controlling effect Effects 0.000 description 6
- 239000012071 phase Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a method for controlling size of boiling liquid bubbles. The method specifically includes that (1) when a magnetic field generating device generates a gradient magnetic field of which a gradient direction and a gravity direction are the same, a magnetic force is exerted on boiling liquid, the direction of the magnetic force and the gravity direction are the same, at the moment, bubble desorption size is reduced due to combined action of a resultant force, bubbles are rapidly subjected to desorption from a heating surface, and the boiling heat transmission efficiency is increased; the bubble desorption size is smaller and the boiling heat transmission efficiency is higher with the increasing of gradient of the gradient magnetic field; (2) when the magnetic field generating device generates a gradient magnetic field of which the gradient direction and the gravity direction are opposite, a magnetic force is exerted on the boiling liquid, the direction of the magnetic force and the gravity direction are opposite, at the moment, bubble desorption size is increased due to combined action of the resultant force, desorption of the bubbles from the heating surface slows down, and the boiling heat transmission efficiency is reduced; the bubble desorption size is larger and the boiling heat transmission efficiency is lower with the increasing of gradient of the gradient magnetic field. According to the method for controlling size of the boiling liquid bubbles, wide scientific and applicable values can be achieved in terms of fields of heat exchangers, cooling loops and energy conversion.
Description
Technical field
The present invention relates to a kind of method controlling liquid boiling Air Bubble Size.
Background technology
Boiling generally refers to and occurs on solid-liquid interface and with the violent phenomenon of Heat of a large amount of bubble formation, be the complicated phenomenon together with a kind of hydrodynamics, delivered heat, mass transport are interweaved with interfacial phenomenon.This process will be there is when face temperatures exceedes the saturation temperature of liquid under system pressure.Heated liquid boiling is the convection heat transfer' heat-transfer by convection being attended by phase transition process, and overheated wall liquid, when becoming gas phase from liquid phase, absorbs a large amount of latent heats of phase change, so the coefficient of heat transfer of boiling heat transfer is far above single-phase convection heat-transfer.This means that a large amount of heats under relatively little wall superheat degree, can remove from overheated wall by boiling heat transfer process.Due to these advantages, boiling heat transfer is regarded as a kind of high efficiency heat transfer technology and is widely used in heating and the cooling of part.Up to the present, most researchers thinks that heat transfer has much relations with the dynamic behavior of steam bubble in boiling process, therefore will inevitably be subject to the impact of various applied external force.And the size of bubble when heating surface desorption has a great impact for the efficiency of whole boiling heat transfer.Bubble desorption size, by the synergy of buoyancy and surface tension etc., does not have good way so far to control the size of desorption bubble.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of method controlling liquid boiling Air Bubble Size.Propose to apply gradient magnetic in boiling liquid outside, boiling liquid is subject to the effect of magnetic force in gradient magnetic.By controlling gradient direction and the size of gradient magnetic, reach the object controlling boiling bubble size size.Because the efficiency of the size of bubble when heating surface desorption for whole boiling heat transfer has a great impact, so the present invention has science and using value widely in heat exchanger, cooling circuit and field of energy conversion.
For achieving the above object, the present invention adopts following technical scheme:
Control a method for liquid boiling Air Bubble Size, comprise the steps:
A. field generator for magnetic is symmetrically arranged in container both sides, boiling liquid is placed in container;
B. field generator for magnetic produces gradient magnetic, the gradient direction in regulating gradient magnetic field, when the gradient direction of the gradient magnetic that field generator for magnetic produces is identical with the gravity direction of boiling liquid, boiling liquid is subject to the magnetic force identical with gravity direction, now, due to the acting in conjunction of making a concerted effort, bubble desorption size in boiling liquid diminishes, bubble is rapidly from heating surface desorption, enhance the efficiency of boiling heat transfer, the gradient of gradient magnetic is larger, then correspond to bubble desorption size less, boiling heat transfer efficiency is higher; When the gradient direction of the gradient magnetic that field generator for magnetic produces is contrary with the gravity direction of boiling liquid, boiling liquid is subject to the magnetic force contrary with gravity direction, now, due to the acting in conjunction of making a concerted effort, the bubble desorption size in boiling liquid becomes large, and bubble is slowly from heating surface desorption, weaken the efficiency of boiling heat transfer, the gradient of gradient magnetic is larger, then correspond to bubble desorption size larger, boiling heat transfer efficiency is lower.Described boiling liquid is organic solvent or inorganic solvent.
The present invention compared with prior art, has apparent outstanding substantive distinguishing features:
Novel structure of the present invention, method is unique, has science and using value widely in heat exchanger, cooling circuit and field of energy conversion.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram that the inventive method uses.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Embodiment 1
As shown in Figure 1, a kind of method controlling liquid boiling Air Bubble Size, comprises the steps:
A. field generator for magnetic 1 is symmetrically arranged in container 2 both sides, boiling liquid 3 is placed in container 2;
B. field generator for magnetic 1 produces gradient magnetic, the gradient direction in regulating gradient magnetic field, when the gradient direction of the gradient magnetic that field generator for magnetic 1 produces is identical with the gravity direction of boiling liquid 3, boiling liquid 3 is subject to the magnetic force identical with gravity direction, now, due to the acting in conjunction of making a concerted effort, bubble desorption size in boiling liquid 3 diminishes, bubble is rapidly from heating surface desorption, enhance the efficiency of boiling heat transfer, the gradient of gradient magnetic is larger, then correspond to bubble desorption size less, boiling heat transfer efficiency is higher; When the gradient direction of the gradient magnetic that field generator for magnetic 1 produces is contrary with the gravity direction of boiling liquid 3, boiling liquid 3 is subject to the magnetic force contrary with gravity direction, now, due to the acting in conjunction of making a concerted effort, the bubble desorption size in boiling liquid 3 becomes large, and bubble is slowly from heating surface desorption, weaken the efficiency of boiling heat transfer, the gradient of gradient magnetic is larger, then correspond to bubble desorption size larger, boiling heat transfer efficiency is lower.
In the present embodiment, described field generator for magnetic 1 adopts DC power supply, and boiling liquid 3 is water.
Embodiment 2
The present embodiment is substantially identical with the embodiment of embodiment 1, and difference is:
In the present embodiment, described field generator for magnetic 1 adopts ac power supply, and boiling liquid 3 is oil.
Claims (2)
1. control a method for liquid boiling Air Bubble Size, it is characterized in that, comprise the steps:
A. field generator for magnetic (1) is symmetrically arranged in container (2) both sides, boiling liquid (3) is placed in container (2);
B. field generator for magnetic (1) produces gradient magnetic, the gradient direction in regulating gradient magnetic field, when the gradient direction of the gradient magnetic that field generator for magnetic (1) produces is identical with the gravity direction of boiling liquid (3), boiling liquid (3) is subject to the magnetic force identical with gravity direction, now, due to the acting in conjunction of making a concerted effort, bubble desorption size in boiling liquid (3) diminishes, bubble is rapidly from heating surface desorption, enhance the efficiency of boiling heat transfer, the gradient of gradient magnetic is larger, then correspond to bubble desorption size less, boiling heat transfer efficiency is higher; When the gradient direction of the gradient magnetic that field generator for magnetic (1) produces is contrary with the gravity direction of boiling liquid (3), boiling liquid (3) is subject to the magnetic force contrary with gravity direction, now, due to the acting in conjunction of making a concerted effort, the bubble desorption size in boiling liquid (3) becomes large, and bubble is slowly from heating surface desorption, weaken the efficiency of boiling heat transfer, the gradient of gradient magnetic is larger, then correspond to bubble desorption size larger, boiling heat transfer efficiency is lower.
2. the method for control liquid boiling Air Bubble Size according to claim 1, is characterized in that, described boiling liquid (3) is organic solvent or inorganic solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410536570.2A CN104296578B (en) | 2014-10-13 | 2014-10-13 | A kind of method controlling liquid boiling Air Bubble Size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410536570.2A CN104296578B (en) | 2014-10-13 | 2014-10-13 | A kind of method controlling liquid boiling Air Bubble Size |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104296578A true CN104296578A (en) | 2015-01-21 |
| CN104296578B CN104296578B (en) | 2016-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410536570.2A Expired - Fee Related CN104296578B (en) | 2014-10-13 | 2014-10-13 | A kind of method controlling liquid boiling Air Bubble Size |
Country Status (1)
| Country | Link |
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| CN (1) | CN104296578B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111050925A (en) * | 2017-08-31 | 2020-04-21 | 佳能株式会社 | Method for producing ultrafine bubbles, apparatus for producing ultrafine bubble-containing liquid, method for producing ultrafine bubble-containing liquid, and ultrafine bubble-containing liquid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4457135A (en) * | 1982-04-23 | 1984-07-03 | Hitachi, Ltd. | Magnetic refrigerating apparatus |
| JP2003240467A (en) * | 2002-02-15 | 2003-08-27 | Showa Denko Kk | Magnetic fluid drive device |
| US20060110262A1 (en) * | 2004-11-23 | 2006-05-25 | Industrial Technology Research Institute | Device of micro loop thermosyphon for ferrofluid power generator |
| CN101294780A (en) * | 2007-04-25 | 2008-10-29 | 中国科学院工程热物理研究所 | Method and device for acoustic cavitation and titanium dioxide nano particle controlling boiling and heat conduction |
| GB2502247A (en) * | 2012-01-17 | 2013-11-27 | Malcolm Hunter | Heat recovery device |
-
2014
- 2014-10-13 CN CN201410536570.2A patent/CN104296578B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4457135A (en) * | 1982-04-23 | 1984-07-03 | Hitachi, Ltd. | Magnetic refrigerating apparatus |
| JP2003240467A (en) * | 2002-02-15 | 2003-08-27 | Showa Denko Kk | Magnetic fluid drive device |
| US20060110262A1 (en) * | 2004-11-23 | 2006-05-25 | Industrial Technology Research Institute | Device of micro loop thermosyphon for ferrofluid power generator |
| CN101294780A (en) * | 2007-04-25 | 2008-10-29 | 中国科学院工程热物理研究所 | Method and device for acoustic cavitation and titanium dioxide nano particle controlling boiling and heat conduction |
| GB2502247A (en) * | 2012-01-17 | 2013-11-27 | Malcolm Hunter | Heat recovery device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111050925A (en) * | 2017-08-31 | 2020-04-21 | 佳能株式会社 | Method for producing ultrafine bubbles, apparatus for producing ultrafine bubble-containing liquid, method for producing ultrafine bubble-containing liquid, and ultrafine bubble-containing liquid |
| US11766685B2 (en) | 2017-08-31 | 2023-09-26 | Canon Kabushiki Kaisha | Ultrafine bubble generating method, ultrafine bubble-containing liquid manufacturing apparatus and manufacturing method, and ultrafine bubble-containing liquid |
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| Publication number | Publication date |
|---|---|
| CN104296578B (en) | 2016-08-24 |
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Granted publication date: 20160824 |