CN104296578B - A kind of method controlling liquid boiling Air Bubble Size - Google Patents
A kind of method controlling liquid boiling Air Bubble Size Download PDFInfo
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- CN104296578B CN104296578B CN201410536570.2A CN201410536570A CN104296578B CN 104296578 B CN104296578 B CN 104296578B CN 201410536570 A CN201410536570 A CN 201410536570A CN 104296578 B CN104296578 B CN 104296578B
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Abstract
The present invention relates to a kind of method controlling liquid boiling Air Bubble Size, during particularly as follows: a. field generator for magnetic produces gradient direction gravity direction identical gradient magnetic, boiling liquid is by the direction magnetic force identical with gravity direction, now, due to the common effect made a concerted effort, causing bubble desorption size to diminish, bubble is desorbed from heating surface rapidly, enhances the efficiency of boiling heat transfer.The gradient of gradient magnetic is the biggest, then correspond to bubble desorption size the least, and boiling heat transfer efficiency is the highest.B., when field generator for magnetic produces gradient direction gravity direction contrary gradient magnetic, boiling liquid is by the direction magnetic force contrary with gravity direction, now, due to the common effect made a concerted effort, causing bubble desorption to become large-sized, bubble slows down from heating surface desorption, weakens the efficiency of boiling heat transfer.The gradient of gradient magnetic is the biggest, then correspond to bubble desorption size the biggest, and boiling heat transfer efficiency is the lowest.The present invention has science and using value widely at heat exchanger, cooling circuit with field of 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 occur on solid-liquid interface and with the violent phenomenon of Heat of a large amount of bubble formations, is the complicated phenomenon together with a kind of hydrodynamics, heat transmission, mass transport are interweaved with interfacial phenomenon.When the saturation temperature of liquid under face temperatures exceedes system pressure, this process will occur.Heated liquid boiling is the convection heat transfer' heat-transfer by convection being attended by phase transition process, and overheated wall liquid, when being become gas phase from liquid phase, absorbs substantial amounts of latent heat of phase change, so the coefficient of heat transfer of boiling heat transfer is far above single-phase convection heat-transfer.This means that substantial amounts of heat can be removed under relatively small wall superheat degree by boiling heat transfer process from overheated wall.Due to these advantages, boiling heat transfer is considered a kind of high efficiency heat transfer technology and is widely used in heating and the cooling of part.Up to the present, most of researcher all thinks that the dynamic behavior of heat transfer and steam bubble has much relations in boiling process, therefore will necessarily be affected by various applied external force.And the size that bubble is when heating surface is desorbed has a great impact for the efficiency of whole boiling heat transfer.Bubble desorption size, by the synergy of buoyancy with surface tension etc., does not has good way to control to be desorbed the size of bubble so far.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of method controlling liquid boiling Air Bubble Size.Proposing to apply gradient magnetic outside boiling liquid, boiling liquid is acted on by magnetic force in gradient magnetic.By controlling gradient direction and the size of gradient magnetic, reach to control the purpose of boiling bubble size size.Owing to the bubble size when heating surface is desorbed has a great impact for the efficiency of whole boiling heat transfer, so the present invention has science and using value widely at heat exchanger, cooling circuit with field of energy conversion.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that
A kind of method controlling liquid boiling Air Bubble Size, comprises 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 by the magnetic force identical with gravity direction, now, due to the common effect made a concerted effort, bubble desorption size in boiling liquid diminishes, bubble is desorbed from heating surface rapidly, enhance the efficiency of boiling heat transfer, the gradient of gradient magnetic is the biggest, then correspond to bubble desorption size the least, and boiling heat transfer efficiency is the highest；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 by the magnetic force contrary with gravity direction, now, due to the common effect made a concerted effort, the bubble desorption in boiling liquid becomes large-sized, and bubble is slowly desorbed from heating surface, weaken the efficiency of boiling heat transfer, the gradient of gradient magnetic is the biggest, then correspond to bubble desorption size the biggest, and boiling heat transfer efficiency is the lowest.Described boiling liquid is organic solvent or inorganic solvent.
The present invention compared with prior art, has and obviously highlights substantive distinguishing features:
Present configuration is novel, and method is unique, has science and using value widely at heat exchanger, cooling circuit with 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 the accompanying drawings embodiments of the invention are described in further detail.
Embodiment 1
As it is shown in figure 1, a kind of method controlling liquid boiling Air Bubble Size, 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 by the magnetic force identical with gravity direction, now, due to the common effect made a concerted effort, bubble 4 in boiling liquid 3 is desorbed size and diminishes, bubble 4 is desorbed from heating surface rapidly, enhance the efficiency of boiling heat transfer, the gradient of gradient magnetic is the biggest, then correspond to bubble 4, to be desorbed size the least, and boiling heat transfer efficiency is the highest；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 by the magnetic force contrary with gravity direction, now, due to the common effect made a concerted effort, bubble 4 desorption in boiling liquid 3 becomes large-sized, and bubble 4 is slowly desorbed from heating surface, weaken the efficiency of boiling heat transfer, the gradient of gradient magnetic is the biggest, then correspond to bubble 4, to be desorbed size the biggest, and boiling heat transfer efficiency is the lowest.
In the present embodiment, described field generator for magnetic 1 uses DC source to power, and boiling liquid 3 is water.
Embodiment 2
The present embodiment is essentially identical with the embodiment of embodiment 1, and difference is:
In the present embodiment, described field generator for magnetic 1 uses alternating current power supply to power, and boiling liquid 3 is oil.
Claims (2)
1. the method controlling liquid boiling Air Bubble Size, it is characterised 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 by the magnetic force identical with gravity direction, now, due to the common effect made a concerted effort, bubble desorption size in boiling liquid (3) diminishes, bubble is desorbed from heating surface rapidly, enhance the efficiency of boiling heat transfer, the gradient of gradient magnetic is the biggest, then correspond to bubble desorption size the least, and boiling heat transfer efficiency is the highest；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 by the magnetic force contrary with gravity direction, now, due to the common effect made a concerted effort, the bubble desorption in boiling liquid (3) becomes large-sized, and bubble is slowly desorbed from heating surface, weaken the efficiency of boiling heat transfer, the gradient of gradient magnetic is the biggest, then correspond to bubble desorption size the biggest, and boiling heat transfer efficiency is the lowest.
The method of control liquid boiling Air Bubble Size the most according to claim 1, it is characterised 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 |
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| Publication Number | Publication Date |
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| CN104296578A CN104296578A (en) | 2015-01-21 |
| CN104296578B true CN104296578B (en) | 2016-08-24 |
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| CN201410536570.2A Active CN104296578B (en) | 2014-10-13 | 2014-10-13 | A kind of method controlling liquid boiling Air Bubble Size |
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| JP7271108B2 (en) | 2017-08-31 | 2023-05-11 | キヤノン株式会社 | Apparatus for producing liquid containing ultra-fine bubbles and method for producing liquid containing ultra-fine bubbles |
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| JPS58184471A (en) * | 1982-04-23 | 1983-10-27 | 株式会社日立製作所 | Magnetic refrigerator |
| JP2003240467A (en) * | 2002-02-15 | 2003-08-27 | Showa Denko Kk | Magnetic fluid drive device |
| TWI246880B (en) * | 2004-11-23 | 2006-01-01 | Ind Tech Res Inst | Device of a micro thermosyphon loop for a ferrofluid power generator |
| CN100585321C (en) * | 2007-04-25 | 2010-01-27 | 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 |
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