CN102108284B - Method for improving energy source efficiency of non-metallic phase change energy storage material - Google Patents
Method for improving energy source efficiency of non-metallic phase change energy storage material Download PDFInfo
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- CN102108284B CN102108284B CN 200910200925 CN200910200925A CN102108284B CN 102108284 B CN102108284 B CN 102108284B CN 200910200925 CN200910200925 CN 200910200925 CN 200910200925 A CN200910200925 A CN 200910200925A CN 102108284 B CN102108284 B CN 102108284B
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Abstract
The invention relates to the technical field of new energy utilization, in particular to a method for improving the energy source efficiency of non-metallic phase change energy storage material, wherein the method comprises the following steps that: the non-metallic phase change materials with liquid-solid phase change property, such as alkane, ester and mixture thereof, are used as energy storage mediums, proportional metal fibers are mixed into the non-metallic phase change material; or the non-metallic phase change energy storage material is added into a metal wire network with a three-dimensional high heat conductivity coefficient, thereby improving the apparent heat conductivity coefficient of the non-metallic phase change energy storage material; the non-metallic phase change material with liquid-solid phase change is condensed at a low phase change temperature and a large amount of heat is needed for raising the temperature thereof again, so that the non-metallic phase change material can be used as a cold energy source; by mixing the proportional metal fibers into the non-metallic phase change energy storage material or adding the non-metallic phase change energy storage material into the metal wire network with the three-dimensional high heat conductivity coefficient, the apparent heat conductivity coefficient of the non-metallic phase change energy storage material can be improved; therefore, the energy source efficiency of non-metallic phase change energy storage material is improved too.
Description
[technical field]
The present invention relates to the new energy use technology field, specifically, is a kind of method that improves the apparent thermal conductivity of nonmetallic phase change energy-storage material.
[background technology]
Sweet natural gas is one of main combustion gas of using in the present city.For ease of transporting and storing, Sweet natural gas will be removed first impurity usually after exploitation out, at low temperatures liquefaction, become natural gas liquids (liquefied natural gas, abbreviation LNG) transports again after, after arriving natural gas liquids receiving station, generally again natural gas liquids is gasified by gasifier, only after gasification, just can flow to the user and do the combustion gas use.Natural gas liquids has a large amount of cold energy and discharges in gasification, and this cold energy is available, recycles this cold energy and can save a large amount of energy in city.
For improving the utilization ratio of cold energy in the liquefied natural gas gasifying process, people at research and utilization nonmetallic phase change energy-storage material as the accumulation of energy medium, cold energy during with the liquefied natural gas gasifying peak is stored up, when low ebb, again the cold energy that stores is discharged, maybe the cold energy of storing is transported to other place that needs outward and utilized equipment for cold energy, to solve the larger problem of present cold energy supply fluctuation, increase substantially the utilising efficiency of cold energy in the liquefied natural gas gasifying process.
But, because the thermal conductivity of non-metallic material is bad, thermal conductivity is much smaller than metallic substance, when in case liquefied natural gas gasifying is at a low ebb, the confession of cold energy is replenished in requisition for utilizing the nonmetallic phase change energy-storage material to discharge cold energy, the thermal conductivity that the nonmetallic phase change energy-storage material is very low will cause the cold energy work output not catch up with, even the savings of nonmetallic phase change energy-storage material have a large amount of cold energy also of no avail, this is unfavorable for the utilization that cold energy is continual and steady.
[summary of the invention]
The object of the invention is to overcome the deficiencies in the prior art, a kind of method that improves energy source efficiency of non-metallic phase change energy storage material is provided, to improve the thermal conductivity of nonmetallic phase change energy-storage material, improve the efficient of cold energy use.
For achieving the above object, the technical scheme taked of the present invention is:
A kind of method that improves energy source efficiency of non-metallic phase change energy storage material, employing has the nonmetal phase transformation material of liquid-solid-phase changeable as the accumulation of energy medium, mixed volume umber 20% is with interior steel fiber in the nonmetallic phase change energy-storage material, perhaps the nonmetallic phase change energy-storage material is joined in the wire network of three-dimensional high thermal conductivity coefficient, thus the apparent thermal conductivity of raising nonmetallic phase change energy-storage material.
The nonmetal phase transformation material of described liquid-solid-phase changeable is alkane, ester class and composition thereof.
The wire network of described three-dimensional high thermal conductivity coefficient is the wire cloth that the establishment of stereoscopic three-dimensional rule is arranged.
Have the nonmetal phase transformation material of liquid-solid-phase changeable because latent heat of phase change is large, can be used as energy storage material utilization: when temperature was very low, this nonmetal phase transformation material will solidify.It is heated up again, will provide a large amount of heat energy for it, that is, this nonmetal phase transformation material has been stored a large amount of cold energy at this moment, can be used as the cold energy energy source and uses.The proportional steel fiber of remix in the nonmetallic phase change energy-storage material, perhaps the nonmetallic phase change energy-storage material is joined in the wire network of three-dimensional high thermal conductivity coefficient, just can improve the apparent thermal conductivity of nonmetallic phase change energy-storage material, thereby improve the source efficiency of nonmetallic phase change energy-storage material.
[description of drawings]
Accompanying drawing 1 is the heat conduction model I with nonmetal phase transformation material of liquid-solid-phase changeable;
Accompanying drawing 2 is the wire network that has added three-dimensional high thermal conductivity coefficient and the heat conduction model II with nonmetal phase transformation material of liquid-solid-phase changeable;
Label among the figure is respectively:
A, radiating surface, solidify front, d, spacing, Q cold energy at B.
[embodiment]
The method that the present invention improves energy source efficiency of non-metallic phase change energy storage material is to adopt the nonmetal phase transformation material with liquid-solid-phase changeable, such as alkane, ester class and composition thereof as the accumulation of energy medium.Mixed volume umber 20% perhaps joins the nonmetallic phase change energy-storage material in the wire network of three-dimensional high thermal conductivity coefficient with interior steel fiber in the nonmetallic phase change energy-storage material, thereby improves the apparent thermal conductivity of nonmetallic phase change energy-storage material.
It is interval that alkane, ester class and composition thereof have lower and very narrow Tc, after they are impregnated into the porous solid body material, just formed the nonmetallic phase change energy-storage material with liquid-solid-phase changeable, their apparent patterns that remains body material before and after the liquid-solid-phase changeable, can be as fluent material natural flow; Their density is relevant with the degree of packing in when filling, more or less has certain interval between the granular base material, and therefore, their thermal conductivity changes greatly, much smaller than metallic substance.
The energy-storage function of nonmetallic phase change energy-storage material mainly is derived from their liquid-solid-phase changeable latent heat, they are in case solidify fully, utilize solid-state → liquid phase decalescence, just must make thermal conduction to solidifying front, as shown in Figure 1, along with radiating surface A constantly absorbs cold energy Q, solidifying front B will constantly move to left, and radiating surface A and the spacing d that solidifies between the front B will constantly increase; Be inversely proportional to owing to absorb cold energy Q and spacing d, the continuous increase of spacing d must cause absorbing cold energy Q and reduce rapidly.
From the thermal conduction study angle, because absorbing cold energy Q is directly proportional with thermal conductivity, when increasing nonmetallic phase change energy-storage material thermal conductivity, absorbing cold energy Q will increase, therefore, the proportional steel fiber of mixing in the nonmetallic phase change energy-storage material that the present invention proposes, the technological method that perhaps the nonmetallic phase change energy-storage material is joined in the wire network of three-dimensional high thermal conductivity coefficient can improve the apparent thermal conductivity of nonmetallic phase change energy-storage material, simultaneously, because the intermetallic between the wire network of steel fiber or three-dimensional high thermal conductivity coefficient is apart from very little, effectively reduce radiating surface A and solidified spacing d between the front B, such as Fig. 2, its net effect will make absorption cold energy Q be greatly improved.
Claims (1)
1. method that improves energy source efficiency of non-metallic phase change energy storage material, it is characterized in that, employing has the nonmetal phase transformation material of liquid-solid-phase changeable as the accumulation of energy medium, mixed volume umber 20% is with interior steel fiber in the nonmetallic phase change energy-storage material, perhaps the nonmetallic phase change energy-storage material is joined in the wire network of three-dimensional high thermal conductivity coefficient, thus the apparent thermal conductivity of raising nonmetallic phase change energy-storage material;
The nonmetal phase transformation material of described liquid-solid-phase changeable is alkane, ester class and composition thereof;
The wire network of described three-dimensional high thermal conductivity coefficient is the wire cloth that the establishment of stereoscopic three-dimensional rule is arranged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910200925 CN102108284B (en) | 2009-12-25 | 2009-12-25 | Method for improving energy source efficiency of non-metallic phase change energy storage material |
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| CN 200910200925 CN102108284B (en) | 2009-12-25 | 2009-12-25 | Method for improving energy source efficiency of non-metallic phase change energy storage material |
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| CN102108284A CN102108284A (en) | 2011-06-29 |
| CN102108284B true CN102108284B (en) | 2013-03-20 |
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| CN107749431A (en) * | 2017-10-20 | 2018-03-02 | 上海交通大学 | The photovoltaic cell component of composite phase-change material auxiliary |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1935932A (en) * | 2006-09-14 | 2007-03-28 | 电子科技大学 | High-heat-conducting composite phase-transition energy-storage material and its preparing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1935932A (en) * | 2006-09-14 | 2007-03-28 | 电子科技大学 | High-heat-conducting composite phase-transition energy-storage material and its preparing method |
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Granted publication date: 20130320 Termination date: 20161225 |