CN101943534A - Heat accumulation device based on magnetic fluid and porous medium - Google Patents
Heat accumulation device based on magnetic fluid and porous medium Download PDFInfo
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- CN101943534A CN101943534A CN2010102914324A CN201010291432A CN101943534A CN 101943534 A CN101943534 A CN 101943534A CN 2010102914324 A CN2010102914324 A CN 2010102914324A CN 201010291432 A CN201010291432 A CN 201010291432A CN 101943534 A CN101943534 A CN 101943534A
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Abstract
The invention relates to a heat accumulation device based on a magnetic fluid and a porous medium, belonging to the technical field of energy. The device mainly comprises an external magnetic field supply device, a heat supply device and a heat accumulation main body, wherein the heat supply device is in contact with one side of the heat accumulation main body to provide differential temperature; the heat accumulation main body is arranged in the external magnetic field supply device, and the descending direction of the temperature gradient of the device is the same with and parallel to the direction of the external magnetic field; and the inside of the heat accumulation body is a cavity filled with a temperature-sensitive magnetic fluid and porous medium materials with uniform pore diameters. By combining the magnetic fluid and the porous medium, the invention realizes that a heat source with a differential temperature of about 100 DEG C or below can be used and improves the heat accumulation capability and efficiency based on the characteristics that the magnetic fluid has temperature sensibility under the action of a magnetic field and the porous medium acting as a solid filler has characteristic storage heat with high heat capacity.
Description
Technical field
The invention belongs to energy technology field, particularly the magnetic fluid a kind of novel heat accumulation method and the device thereof that in porous media, conduct heat and improve heat storage capacity, heat storage efficiency.
Background technology
" 21 century is the age of a peace, if war takes place, that will inevitably be the war that the energy causes ".The energy is the material base of world's running; along with development of human society, the reserves of the traditional energy that coal, oil etc. are non-renewable are fewer and feweri, and human increasing to the interdependency of the energy; the energy crisis of Yin Faing is extremely urgent therefrom, becomes one of problem that the mankind have to face.In many solutions, saving and reasonable energy utilization are at the simplest and direct solution of present energy situation.
In numerous energy, heat energy is one of most important energy wherein.Heat energy can be used for various dissimilar industrial enterprises, is most widely used form of energy in people's lives and the social economy, saves and rationally utilizes heat energy that the meaning of particular importance is arranged.But most of energy as solar energy, wind energy, geothermal energy, industrial exhaust heat used heat etc., all exist discontinuity and unstability, and in many cases, the energy can not rationally be utilized.With solar energy is example: solar energy is the rich natural resource and little to environmental hazard of reserves in the world, if can utilize, will be the effective way that solves energy crisis.But many weeks, solar energy has discontinuity and unstability, when not needing too many heat, a large amount of heat generations is arranged, and heat a big chunk of supply is lost as waste heat; And need when hot, heat but can not in time provide.Heat storage technology can address this problem.Existing heat storage technology has three kinds of sensible heat accumulation of heat, latent-heat storage and chemical heat accumulations, and wherein latent-heat storage is temperature required higher, and cost is also higher.The sensible heat heat storage type is fairly simple, and cost is lower, is fit to the not too high form of energy of these temperature of solar heat-preservation.But the existing working medium of using that is used for accumulation of heat or its performance of material and efficient are not high, particularly in the amount of thermal energy of accumulating and accumulate aspect the speed that discharges heat energy.
Summary of the invention
The objective of the invention is for overcoming the weak point of prior art, proposition utilizes the magnetic fluid and the porous media regenerative apparatus of temperature sensitivity, combination utilization by magnetic fluid and porous media, utilize magnetic fluid under magnetic field effect, to have this characteristic of temperature sensitivity and porous media has the high speciality store heat of thermal capacitance as a kind of solid filler, the thermal source of the temperature difference below reaching about 100 ℃ be can utilize, and the ability and the efficient of accumulation of heat improved.
The technical solution adopted in the present invention is: a kind of temperature sensitivity magnetic fluid and porous media regenerative apparatus of utilizing is characterized in that this device mainly is made up of externally-applied magnetic field feeding mechanism, supply thermal device and accumulation of heat main body; Wherein, supply thermal device and accumulation of heat main body one side contacts provide the temperature difference; The accumulation of heat main body is arranged among the externally-applied magnetic field feeding mechanism, and the thermograde of this device direction of successively decreasing is identical with the externally-applied magnetic field direction and parallel; Regenerative apparatus is the inner square cavity that is full of the uniform porous media material of temperature sensitivity magnetic fluid and aperture.
Operation principle of the present invention: solid matter has very high specific heat, identical temperature raises, the heat of its storage is higher than general fluid far away, but the ability of its heat transfer of medium of common material is poor, for overcoming this technical barrier, and the ability and the efficient of raising accumulation of heat, among the present invention, the externally-applied magnetic field that externally-applied magnetic field feeding mechanism (by electromagnet or hot-wire coil) produces, magnetic fluid is magnetized in the square chamber of filling porous medium, be sidelong in accumulation of heat main body one and put the thermal source that the temperature difference can be provided, because magnetic fluid has temperature sensitivity, its magnetic susceptibility difference under different temperatures, thereby stressed also different in externally-applied magnetic field, this masterpiece is that driving force is ordered about magnetic fluid and flowed in square chamber, flow in porous media thereby drive heat, the accelerated heat transmission is simultaneously because the adding of the solid filler of porous media, than other fluids, increased the ability of accumulation of heat again.
In the practical application, provide the thermal source of the temperature difference can be solar energy, like this in solar thermal utilization just can unnecessary heat of time-division at noon store be used at dusk or do not have solar energy or solar energy rareness a night in, carry out effective planning of energy.
In the practical application, provide the thermal source of the temperature difference also can be waste heat used heat such as solar water, industrial waste heat, unnecessary heat can be stored like this, be used when needed.
Characteristics of the present invention and effect:
The present invention is applied to magnetic fluid in the porous media, the temperature sensitivity speciality, magnetic fluid that makes full use of magnetic fluid can flow characteristic that accelerated heat transmits and porous media as the bigger characteristics of solid filler specific heat as fluid, improves the ability and the efficient of sensible heat accumulation of heat.
Description of drawings
Fig. 1 is an apparatus structure schematic diagram of the present invention.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
The device that utilizes temperature sensitivity magnetic fluid and porous media accumulation of heat of the present invention is as shown in Figure 1: this device mainly is made up of externally-applied magnetic field feeding mechanism 3, supply thermal device (thermal source) 5 and accumulation of heat main body 1; Wherein, when directly utilizing solar energy, supply thermal device 5 closely contacts with accumulation of heat main body 1 upside, and the temperature difference is provided; When utilizing waste heat used heat such as solar water or industrial wastewater, supply thermal device 5 closely contacts with accumulation of heat main body 1 a certain side (upper and lower surface or left and right side); Accumulation of heat main body 1 is arranged among the externally-applied magnetic field feeding mechanism 3, when heating plant during at accumulation of heat main body upside, add the direction in magnetic field for vertically downward, when heating plant during at accumulation of heat main body downside, institute adds magnetic direction 4 for vertically upward (as shown in fig. 1), when heating plant is on the left of the accumulation of heat main body, the institute add magnetic direction be level to the right, when heating plant during on accumulation of heat main body right side, institute add magnetic direction be level left, promptly the thermograde of this device direction of successively decreasing is identical with the externally-applied magnetic field direction and parallel; Regenerative apparatus 1 is the inner square cavity that is full of the uniform porous media material 12 of magnetic fluid 11 and aperture.
This device is under action of thermal difference, and the magnetic fluid in the main body regenerative apparatus 1 produces nature and flows, and quickens heat and transmits and accumulation of heat.
Operation principle of the present invention and characteristics: under the externally-applied magnetic field effect, magnetic fluid is magnetized in the square chamber of filling porous medium, be sidelong in square chamber one and put the thermal source that heat is provided, the thermograde of the thermal source direction of successively decreasing is identical with the externally-applied magnetic field direction, because the temperature sensitivity of magnetic fluid, magnetic force orders about magnetic fluid and flows in square chamber, thereby driving heat flows in porous media, accelerated heat is transmitted, simultaneously because the adding of the solid filler of porous media, than other fluids, increased the ability of accumulation of heat again.
The specific embodiment and the course of work of device of the present invention are described as follows:
The supply thermal device can be solar absorbing film or solar energy absorbing paint, directly covers or spread upon the upper surface of accumulation of heat main body.
The supply thermal device also can be devices such as solar water, industrial waste heat, be placed on accumulation of heat main body one side, carry out heat convection with the accumulation of heat main body, a side that contacts with regenerative apparatus can select heat conductivility preferably material be made.
The externally-applied magnetic field feeding mechanism can be provided by magnetic field generating means such as electromagnet or coils, and the scope of magnetic field Rayleigh number (Ram) is 0.5 * 10
8-1.5 * 10
8Between.
The accumulation of heat main body can be chamber, square side, and its length is in the scope of 1mm-10m; May be selected to be heat conductivility preferably material make, as aluminium sheet,, do not have the both sides of the temperature difference to be covered with the insulating moulding coating layer in square chamber to strengthen the heat transmission, play insulation effect.The porous media material of filling in the chamber, side generally require thermal conduction characteristic better reach thermal capacity greatly, be preferably even and non deformable solid matrix material, but sintering or compacting form; The porous media of sintering generally requires porous nickel, arranges symmetry, and porous can be selected the acroleic acid polymerization plastic cement between 0.2-0.8.Magnetic fluid in the chamber, the side of being filled in can select to be suspended in the ferromagnetic fluids of the Mg-Zn ferrous acid base equitemperature sensitiveness in the kerosene, generally requires nano particle even, is suspended in the matrix, does not have precipitation, and phenomenons such as gathering occur.
The course of work of present embodiment is: when directly utilizing solar energy this device is placed on sun-drenched place, fine day can carry out accumulation of heat work; Night or cloudy day can be closed the externally-applied magnetic field feeding mechanism, and heat will be stored in the accumulation of heat main body.When utilizing waste heat used heat such as hot water, the heat feeding mechanism is placed regenerative apparatus one side, carry out exchange heat with regenerative apparatus, and open heat feeding mechanism valve or switch; When accumulation of heat begins, at first open the externally-applied magnetic field feeding mechanism, then regenerative apparatus is started working and accumulation of heat.When need utilize the heat of accumulation of heat main body, can be on the in addition side joint of accumulation of heat main body low-temperature receiver (as cold water storage cistern) or install low-temperature receiver in advance; Open the externally-applied magnetic field feeding mechanism again, then can make low-temperature receiver heating (as the water of cold water storage cistern is heated), be utilized then.Also can make accumulation of heat and utilize heat to carry out simultaneously.
Claims (7)
1. utilize the regenerative apparatus of magnetic fluid and porous media, it is characterized in that, this device mainly is made up of externally-applied magnetic field feeding mechanism, supply thermal device and accumulation of heat main body; Wherein, supply thermal device and accumulation of heat main body one side contacts provide the temperature difference; The accumulation of heat main body is arranged among the externally-applied magnetic field feeding mechanism, and the thermograde of this device direction of successively decreasing is identical with the externally-applied magnetic field direction and parallel; The accumulation of heat main body is the inner cavity that is full of the uniform porous media material of temperature sensitivity magnetic fluid and aperture.
According to claim 1 the device, it is characterized in that, the length in the chamber of described accumulation of heat main body and width all 1mm-10m with order magnitude range in.
3. described in claim 1, install, it is characterized in that described supply thermal device is carried out the solar water of heat exchange, the heat feeding mechanism of industrial waste heat for the solar absorbing film that directly covers or spread upon the upper surface of accumulation of heat main body, solar energy absorbing coating or with accumulation of heat main body one side surface.
4. device described in claim 1 is characterized in that chamber, described accumulation of heat main body side does not have the coating on both sides of the temperature difference that the insulating moulding coating layer is arranged.
5. device described in claim 1 is characterized in that the porosity of described porous media is between 0.2-0.8.
6. device described in claim 5 is characterized in that, described porous media material is selected the acroleic acid polymerization plastic cement.
7. device described in claim 1 is characterized in that, the magnetic fluid in the chamber, the described side of being filled in selects to be suspended in the ferromagnetic fluids of the Mg-Zn ferrous acid base in the kerosene.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102914324A CN101943534B (en) | 2010-09-21 | 2010-09-21 | Heat accumulation device based on magnetic fluid and porous medium |
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| CN2010102914324A CN101943534B (en) | 2010-09-21 | 2010-09-21 | Heat accumulation device based on magnetic fluid and porous medium |
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| CN101943534A true CN101943534A (en) | 2011-01-12 |
| CN101943534B CN101943534B (en) | 2012-11-21 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654868A (en) * | 2013-11-17 | 2015-05-27 | 成都奥能普科技有限公司 | Solid grain block heat accumulating type multi-generation unit and trolley |
| CN106440419A (en) * | 2016-08-31 | 2017-02-22 | 中海阳能源集团股份有限公司 | Solar heat collection and storage magnetic medium and transportation device and transportation method thereof |
| CN109631646A (en) * | 2018-12-26 | 2019-04-16 | 安徽智磁新材料科技有限公司 | Utilize the regenerative apparatus and method of porous carbon and ferrofluid |
| CN109631647A (en) * | 2018-12-26 | 2019-04-16 | 安徽智磁新材料科技有限公司 | Utilize the heat accumulation method and device of foam copper and ferrofluid |
| CN110220405A (en) * | 2019-05-22 | 2019-09-10 | 国网辽宁省电力有限公司大连供电公司 | Solid heat storage heat transfer control method based on Fourier number consistency |
| CN110671957A (en) * | 2019-10-21 | 2020-01-10 | 浙江大学 | Phase-change heat storage strengthening device based on alternating magnetic field and operation method thereof |
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| JPS56121993A (en) * | 1980-03-03 | 1981-09-25 | Kimura Giken:Kk | Heat accumulating device |
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| JP2002195683A (en) * | 2000-12-20 | 2002-07-10 | Denso Corp | Magnetic temperature regulating apparatus |
| CN2847175Y (en) * | 2005-07-28 | 2006-12-13 | 西北工业大学 | Semiconductor refrigerating thermomagnetic circulation heat radiator |
| CN201852504U (en) * | 2010-09-21 | 2011-06-01 | 昆明东启科技股份有限公司 | Heat storage device utilizing magnetic fluid and porous medium |
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2010
- 2010-09-21 CN CN2010102914324A patent/CN101943534B/en active Active
Patent Citations (5)
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| JPS56121993A (en) * | 1980-03-03 | 1981-09-25 | Kimura Giken:Kk | Heat accumulating device |
| US4459811A (en) * | 1983-03-28 | 1984-07-17 | The United States Of America As Represented By The United States Department Of Energy | Magnetic refrigeration apparatus and method |
| JP2002195683A (en) * | 2000-12-20 | 2002-07-10 | Denso Corp | Magnetic temperature regulating apparatus |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654868A (en) * | 2013-11-17 | 2015-05-27 | 成都奥能普科技有限公司 | Solid grain block heat accumulating type multi-generation unit and trolley |
| CN104654868B (en) * | 2013-11-17 | 2018-06-19 | 成都奥能普科技有限公司 | Solid grain block heat accumulating type Poly-generation unit and locomotive |
| CN106440419A (en) * | 2016-08-31 | 2017-02-22 | 中海阳能源集团股份有限公司 | Solar heat collection and storage magnetic medium and transportation device and transportation method thereof |
| CN109631646A (en) * | 2018-12-26 | 2019-04-16 | 安徽智磁新材料科技有限公司 | Utilize the regenerative apparatus and method of porous carbon and ferrofluid |
| CN109631647A (en) * | 2018-12-26 | 2019-04-16 | 安徽智磁新材料科技有限公司 | Utilize the heat accumulation method and device of foam copper and ferrofluid |
| CN110220405A (en) * | 2019-05-22 | 2019-09-10 | 国网辽宁省电力有限公司大连供电公司 | Solid heat storage heat transfer control method based on Fourier number consistency |
| CN110671957A (en) * | 2019-10-21 | 2020-01-10 | 浙江大学 | Phase-change heat storage strengthening device based on alternating magnetic field and operation method thereof |
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| CN101943534B (en) | 2012-11-21 |
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