WO2018093091A1 - Composition de fusion de milieu de transfert thermique, système de transfert thermique l'utilisant, et dispositif de production d'énergie utilisant le système de transfert thermique - Google Patents

Composition de fusion de milieu de transfert thermique, système de transfert thermique l'utilisant, et dispositif de production d'énergie utilisant le système de transfert thermique Download PDF

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Publication number
WO2018093091A1
WO2018093091A1 PCT/KR2017/012638 KR2017012638W WO2018093091A1 WO 2018093091 A1 WO2018093091 A1 WO 2018093091A1 KR 2017012638 W KR2017012638 W KR 2017012638W WO 2018093091 A1 WO2018093091 A1 WO 2018093091A1
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Prior art keywords
heat
heat transfer
transfer medium
energy
alkali metal
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PCT/KR2017/012638
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English (en)
Korean (ko)
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김영
최준석
김동호
윤석호
김욱중
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한국기계연구원
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Priority claimed from KR1020170057030A external-priority patent/KR101897463B1/ko
Application filed by 한국기계연구원 filed Critical 한국기계연구원
Priority to EP17871327.7A priority Critical patent/EP3543312B1/fr
Priority to ES17871327T priority patent/ES2942306T3/es
Publication of WO2018093091A1 publication Critical patent/WO2018093091A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/08—Materials not undergoing a change of physical state when used
    • C09K5/10—Liquid materials
    • C09K5/12—Molten materials, i.e. materials solid at room temperature, e.g. metals or salts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

Definitions

  • the present invention relates to a heat transfer medium melt composition, a heat transfer system using the same, and a power generator using the heat transfer system, which are used for generation, transfer, storage, conversion to other energy, and the like, of heat energy in a process or system requiring high temperature.
  • the heat transfer system can be divided into two cases, which are performed at a high temperature and at a low temperature.
  • Low temperature heat transfer systems of about 100 ° C. or less (or about 150 ° C. or less at high pressure) are mainly used to supply waste heat generated from factories, cogeneration plants, and the like to homes, and an aqueous solution composition is mainly used as a heat transfer medium.
  • the high temperature heat transfer system cannot be used as a heat transfer medium such as an aqueous solution composition generally used in the low temperature heat transfer system.
  • a power generation system using solar energy as an example of a high temperature heat transfer system is essential for the practical operation of energy efficient high temperature heat transfer system, but the heat transfer medium in the aqueous state is not available because it is vaporized at about 100 °C. .
  • Such high temperature or ultra high temperature heat transfer systems require a heat transfer medium capable of storing and transferring heat energy at high or ultra high temperatures.
  • the heat transfer medium studied so far is greatly influenced by variables such as place, time, and environment, and is a high temperature environment. There is a limit to the stability.
  • solar power accompanied by a high temperature heat transfer system is used with a reflector for boiling water and focusing on solar energy to produce high pressure steam, which leads the turbine and generator device to generate electricity.
  • a heat transfer medium is used to transfer, store, and convert heat energy to other energy. Therefore, the heat transfer medium used in the solar power system with such a high temperature process should be excellent in thermal stability.
  • the heat transfer medium since the heat transfer medium maintains a molten state at a low temperature in the process, it is highly desirable in view of high process efficiency, and therefore, the heat transfer medium must have a lower low melting point characteristic to maintain the molten state even at a low temperature.
  • a fluid having a low melting point has been studied in the past as a eutectic mixture of biphenyl and disulfonic acid.
  • the fluid containing biphenyl and disulfonic acid has a low melting point, but due to thermal deterioration, it cannot be used above 390 ° C. This low temperature range also severely limits the thermodynamic efficiency of steam turbines driven by heat from the solar collector site.
  • the heat transfer medium which is a molten salt having excellent properties in terms of thermal stability.
  • the molten salt-based heat transfer medium has an advantage of having high density, high heat capacity, and high thermal stability even at a relatively high temperature.
  • US Patent Publication No. 2015-0010875A1 discloses a THERMAL ENERGY STORAGE WITH MOLTEN SALT in which molten salt is used as the heat transfer medium.
  • a molten salt-based heat transfer medium is limited to use above 550 ° C.
  • Typical examples of the nitrate-based heat transfer medium include fluids containing 60% sodium nitrate and 40% potassium nitrate.
  • Nitrogen oxide (NO 3 ⁇ ) based heat transfer media begin to decompose above 550 ° C. and thus cannot be used at higher temperatures. That is, due to the characteristics of the heat transfer medium system that is continuously used in circulation in a closed system, there is a problem that is practically impossible to use in a system requiring a higher temperature for high efficiency.
  • the heat transfer medium melt composition according to an embodiment of the present invention may include an alkali metal chloride, a first alkali metal carbonate, a second alkali metal carbonate and an alkali metal hydroxide.
  • the alkali metal may be independently selected from lithium, sodium and potassium.
  • the composition may include potassium chloride (KCl), sodium carbonate (Na 2 CO 3 ), potassium carbonate (K 2 CO 3 ) and sodium hydroxide (NaOH).
  • KCl potassium chloride
  • Na 2 CO 3 sodium carbonate
  • K 2 CO 3 potassium carbonate
  • NaOH sodium hydroxide
  • the composition may comprise 20 to 50% by weight of potassium chloride, 15 to 50% by weight of sodium carbonate, 10 to 40% by weight of potassium carbonate and 5 to 50% by weight of sodium hydroxide.
  • the composition may comprise 51 to 90% by weight of sodium hydroxide, specifically 60 to 90% by weight. More preferably, the composition may comprise 1 to 10% by weight of potassium chloride, 2 to 20% by weight of sodium carbonate, and 2 to 20% by weight of potassium carbonate.
  • the composition may be a melting point of 200 ⁇ 300 °C.
  • the composition may be a decomposition temperature and boiling point 700 ⁇ 800 °C.
  • the width of the melting point of the composition may be within ⁇ 10 °C centered on the melting peak temperature.
  • the step of transferring the heat energy from the heat source to the heat storage material B) the step of converting the heat energy from the heat storage material transferred heat energy to other energy to lose the heat energy of the heat storage material and C
  • the step A) ⁇ C) may be circulated, including the step of transferring heat storage material having lost heat energy to the heat source.
  • the heat storage material includes the heat transfer medium melting composition.
  • step A) may be performed at 300 ⁇ 700 °C.
  • a power generation device using a heat transfer system includes a heat supply unit for transferring heat energy from a heat source to the heat storage material; A heat exchanger receiving heat energy from the heat storage material of the heat supply unit; A power generation unit converting the heat energy received from the heat exchanger into other energy; And a transfer unit transferring the heat storage material whose heat energy is lost in the heat exchange unit to a heat supply unit.
  • the heat storage material includes the heat transfer medium melting composition.
  • the heat transfer medium melt composition does not decompose and vaporize even at a relatively high temperature of 700 ° C. or higher, so that the thermal stability is excellent, and in particular, it has a relatively very low melting point of 300 ° C. or less, and a very wide melting point range. There is a narrow effect.
  • the heat transfer medium melt composition is advantageous in that it is not corrosive to metals.
  • the heat transfer medium melt composition also has the advantage of having a higher heat capacity.
  • the heat transfer medium melt composition has a low melting point as it has a specific composition ratio, and at the same time, the entire composition of the composition may be completely melted and exist.
  • the heat transfer system comprising the heat transfer medium melt composition is relatively non-corrosive to metals and has a relatively low melting point of 300 ° C. or less, even though it has high thermal stability, at which point the entire composition of the composition may be completely melted.
  • the heat transfer medium melt composition is used, the energy conversion efficiency and the process efficiency are very high.
  • FIG. 1 is a conceptual diagram illustrating a heat transfer system using a heat transfer medium melt composition according to an embodiment of the present invention.
  • Example 5 is a graph showing the results of measuring the change in the heat of fusion at the melting point of 264 ⁇ 265 ° C of the heat transfer medium melt composition according to Example 3 and Comparative Example 1.
  • first transfer unit 20 second transfer unit
  • unit of% used unambiguously in the present invention without particular reference means weight%.
  • temperature referred to in the present invention may mean a value of the measured temperature at an atmospheric pressure of 1 atm unless otherwise specified.
  • heat transfer medium is a material capable of loss and storage by transfer of heat energy, and may mean a material used as a means for transferring heat energy of a heat transfer medium to another material or converting it into other energy. have. Therefore, it means a heat transfer medium of a comprehensive concept including various things (heat storage material, heat radiation material, heat transfer material, etc.) that can be used for such means and uses.
  • thermal stability referred to in the present invention may be described based on the boiling point and decomposition temperature of the composition. Specifically, excellent thermal stability may mean a high boiling point and a high decomposition temperature.
  • the “decomposition temperature” of the molten composition referred to in the present invention may mean a temperature at which one or more components of a compound such as chloride, carbonate, hydroxide, etc. in the molten composition starts to decompose.
  • the “boiling point” of the molten composition referred to in the present invention may mean a temperature at which one or more components of a compound such as chloride, carbonate, hydroxide, etc. in the molten composition starts to boil.
  • other energy may mean all kinds of energy except thermal energy. Examples thereof include electrical energy, potential energy, kinetic energy, and the like, and preferably, electrical energy may be exemplified in a final conversion form.
  • the inventors have completed the present invention by finding a heat transfer medium melt composition which is compatible with high heat capacity, high thermal stability and low melting point, in which the whole composition of the composition can be completely melted at a low melting point. Specifically, although it has excellent thermal stability that does not decompose even at relatively high temperatures of 700 ° C. or more, it has a relatively very low melting point of 300 ° C. or less, and the entire composition of the composition is completely melted at a low melting point as it satisfies a specific composition ratio range. The molten composition was found to complete the present invention.
  • the heat transfer medium melt composition according to an embodiment of the present invention may include an alkali metal chloride, a first alkali metal carbonate, a second alkali metal carbonate and an alkali metal hydroxide. At this time, the first alkali metal and the second alkali metal are different alkali metals.
  • the alkali metal is not limited as long as it is an alkali metal belonging to the periodic table, and may be selected from lithium, sodium, potassium, rubidium, cesium and francium, respectively.
  • the alkali metal may be selected from lithium, sodium and potassium, respectively, and if satisfied, it may be advantageous in terms of commercial and environmental aspects with excellent thermal stability.
  • the heat transfer medium melt composition of the present invention may have a decomposition temperature of 700 ° C. or higher, specifically 700-800 ° C.
  • a decomposition temperature of 700 ° C. or higher, specifically 700-800 ° C.
  • alkali metal chlorides, alkali metal carbonates, and alkali metal hydroxides melt and exist in an ionic state, respectively.
  • Ions such as Cl - and CO 3 2- , OH - are present in the molten phase, and these ions have characteristics of very high decomposition temperature.
  • the heat transfer medium melt composition of the present invention comprising alkali metal chlorides, first alkali metal carbonates, second alkali metal carbonates and alkali metal hydroxides may have excellent properties with relatively low melting points of 200-300 ° C.
  • the heat transfer medium melt composition, when the potassium chloride, sodium carbonate, potassium carbonate and sodium hydroxide, the excellent properties having a relatively very low melting point of 200 ⁇ 280 °C do.
  • the heat transfer medium melting composition may include potassium chloride (KCl), sodium carbonate (Na 2 CO 3 ), potassium carbonate (K 2 CO 3 ), and sodium hydroxide (NaOH).
  • the composition that satisfies this may have a relatively very high decomposition temperature of 700 ° C. or higher, specifically 700-800 ° C., and has a relatively very low melting point of 300 ° C. or lower, specifically 200-300 ° C.
  • Such a heat transfer medium melt composition comprising KCl, Na 2 CO 3 , K 2 CO 3 and NaOH has excellent properties with a melting point of about 150 ° C. lower than that in particular without NaOH.
  • the melting point of KCl is 770 ° C
  • the melting point of Na 2 CO 3 is 858 ° C
  • the melting point of K 2 CO 3 is 900 ° C
  • the melting point of NaOH is 328 ° C. to be.
  • the melt compositions according to one embodiment of the present invention in which they are mixed and melt in a common mixture, have a significantly low melting point.
  • the composition according to an embodiment of the present invention further contains NaOH has a melting point of 200 ⁇ 300 °C It can be seen that it has a very good effect. It is easier for the heat transfer medium to maintain the composition even at low temperatures in the process. Therefore, the composition of the present invention having a low melting point is high in process efficiency and energy efficiency.
  • the molten composition which is a common mixture, may not have the same temperature when the melting is first started and the temperature when the melting of the whole composition of the composition is completed, depending on the composition and the ratio of the components.
  • the melting point of the melt composition may thus generally be defined differently as the temperature at which melting begins, the temperature at which it is completed or a temperature range therebetween.
  • the "melting point” is defined as the temperature at which melting of the molten composition begins.
  • the heat transfer medium melt composition of the present invention has an excellent effect of having a lower melting point and a narrower range of melting point ranges.
  • the heat transfer medium melt composition comprises all of KCl, Na 2 CO 3 and K 2 CO 3 and in particular NaOH, i.e. with the low melting point characteristics described above as NaOH is further included, the width of the melting point range is very narrow. Has excellent properties.
  • the width of the actual melting point range of the molten composition consisting of KCl, Na 2 CO 3 and K 2 CO 3 is at least ⁇ 70 ° C. centered on the peak temperature, whereas NaOH and KCl, Na 2 CO 3 and K 2 CO 3 are included.
  • the molten composition has a value within ⁇ 10 ° C, preferably within ⁇ 5 ° C, more preferably within ⁇ 3 ° C around the peak temperature. Therefore, the melt composition comprising NaOH and KCl, Na 2 CO 3 and K 2 CO 3 is very narrow in the melting point range, it is easy to set the maximum melting point on the system using it, and the influence of various environmental variables is reduced Has an effect.
  • the width of the melting point range or the width of the melting point referred to in the present invention is the width of the interval between the melting start temperature and the melting completion temperature centered on the peak temperature of the thermal analysis spectrum obtained by a thermal analysis device such as a differential scanning calorimeter. It may mean.
  • composition ratio of the molten composition according to an embodiment of the present invention may have a first composition ratio or a second composition ratio. Both melt compositions that satisfy the first or second composition ratio may have low melting points.
  • the composition having the first composition ratio of 20 to 50% by weight of alkali metal chloride, 10 to 50% by weight of the first alkali metal carbonate, 10 to 50% by weight of the second alkali metal carbonate and 5 to 50% by weight of the alkali metal hydroxide May contain%.
  • the composition having a second composition ratio of 1 to 10% by weight of alkali metal chloride, 2 to 20% by weight of the first alkali metal carbonate, 2 to 20% by weight of the second alkali metal carbonate and 51 to 90% by weight of the alkali metal hydroxide It may include, and specifically 1 to 10% by weight of alkali metal chloride, 2 to 20% by weight of the first alkali metal carbonate, 2 to 20% by weight of the second alkali metal carbonate and 60 to 90% by weight of the alkali metal hydroxide can do.
  • the melting point may be further reduced, thereby maintaining the fluid circulation temperature lower.
  • the melting point distribution of the composition in which the components are co-mixed can be further reduced to facilitate the setting of the maximum melting point in the system, to further reduce the influence of various environmental variables, and to prevent corrosion of container materials such as metallic materials.
  • the impact can be further reduced.
  • the molten composition having the first composition ratio may include KCl, Na 2 CO 3 and K 2 CO 3 and NaOH 5 to 50% by weight. Since NaOH has deliquescent properties and can cause corrosion of metals due to water absorption, when the NaOH content ratio is lower than that of the second composition ratio, the corrosion resistance to the metal is significantly lowered, so that the durability of the device used in the heat transfer system and Weather resistance can be significantly increased.
  • the molten composition having a first composition ratio may include 20 to 50% by weight of KCl, 15 to 50% by weight of Na 2 CO 3 , 10 to 40% by weight of K 2 CO 3, and 5 to 50% by weight of NaOH. More specifically, KCl may include 30 to 45% by weight, 22 to 45% by weight of Na 2 CO 3 , 12 to 35% by weight of K 2 CO 3, and 5 to 15% by weight of NaOH. If this is satisfied, the physical / chemical stability in an environment in which the temperature rise and decrease of the molten composition which is a common mixture is repeatedly performed is improved.
  • the composition having a second composition ratio may include 51 to 90% by weight, specifically 60 to 90% by weight of KCl, Na 2 CO 3 and K 2 CO 3 and NaOH. If this is satisfied, the whole component of the composition is melted and present even at very low melting points of, for example, 265 ° C. Therefore, it is very suitable for a system or apparatus used as a heat transfer medium composition in which the composition in the molten state moves directly to transfer energy as shown in FIG. 1, and is very suitable and preferable as a heat transfer medium composition used in the system or apparatus described below, for example. Do.
  • the heat storage density is high even at a very low melting point, and when used as a heat transfer medium composition, the energy efficiency is very excellent.
  • the composition having a second composition ratio may include 1 to 10% by weight of KCl, 2 to 20% by weight of Na 2 CO 3, 2 to 20% by weight of K 2 CO 3, and 51 to 90% by weight of NaOH. Specifically, it may include 1 to 10% by weight of KCl, 2 to 20% by weight of Na 2 CO 3, 2 to 20% by weight of K 2 CO 3, and 60 to 90% by weight of NaOH. If this is satisfied, the physical / chemical stability in an environment in which the temperature rise and decrease of the molten composition which is a common mixture is repeatedly performed is improved.
  • the heat transfer medium melt composition of the present invention can be used in a heat transfer system or a power generation apparatus using a heat transfer system.
  • the operating temperature range for the heat transfer medium melt composition is not particularly limited, and specifically, may be 200 to 800 ° C, preferably 300 to 700 ° C.
  • the present invention also provides a heat transfer system (method) using the heat transfer medium melt composition described above.
  • the heat transfer system includes the steps of A) transferring heat energy from the heat source to the heat storage material, B) converting heat energy from the heat storage material to which the heat energy is transferred into other energy, and thus losing the heat energy of the heat storage material, and C) heat storage from which the heat energy is lost.
  • the steps A) to C) may be circulated.
  • the heat storage material includes the above-described heat transfer medium melting composition.
  • step A thermal energy is transferred from the heat source to the heat storage material.
  • the heat storage material thus received may be transferred to a place requiring heat energy, and the heat energy of the transferred heat storage material may be converted to other energy, and this process may be referred to as step B).
  • step B the heat storage material loses more thermal energy.
  • the heat storage material whose heat energy is lost is transferred to the heat source of step A) again from step C), and the heat storage material which has lost heat energy receives heat energy from the heat source again.
  • the present invention can provide a power generation system using a heat transfer circulation system capable of repeatedly performing such a cycle and consequently converting a heat source into other energy.
  • step A) may be performed at 200 to 800 ° C, preferably 300 to 700 ° C.
  • the heat energy can be stored, transferred, and converted to other energy, it can have high power generation efficiency and high energy conversion efficiency.
  • the present invention provides a power generation device using the heat transfer system.
  • the generator includes a heat exchanger receiving heat energy from a heat storage material of the heat supply unit; A power generation unit converting the heat energy received from the heat exchanger into other energy; And a transfer unit transferring the heat storage material whose heat energy is lost in the heat exchange unit to a heat supply unit.
  • the heat storage material includes the above-described heat transfer medium melting composition.
  • the heat supply unit may provide heat energy, and an apparatus for supplying heat energy generated by nuclear power generation, geothermal power generation, solar power generation, cogeneration or thermal power generation, and the like may be exemplified.
  • the heat exchanger receives heat energy from the heat supply unit, and serves to transfer the transferred heat energy to a path that requires it.
  • the path is not limited as long as it requires heat energy, and in particular, is not limited as long as it can convert heat energy into other forms of energy.
  • the transfer unit serves to transport and store the thermal energy and the heat storage material including the thermal energy to the target location, such as a generator, which is not limited because it is known in various technical fields.
  • the transfer unit may be formed in one or a plurality, it may be divided into a storage unit and a transfer unit.
  • this is only a specific example, and the present invention is not limited thereto.
  • the power generation device may be a power generation device using a heat transfer system as shown in FIG. Since the temperature shown in FIG. 1 is for conceptually explaining heat exchange, the present invention is not limited thereto. Specifically, “ ⁇ 1000 ° C.” shown in FIG. 1 means a condensing maximum temperature, and indicates applicability as a high heat source. In addition, the 200 ° C shown in Figure 1 is to explain the heat storage material in a state of low energy level by consuming heat energy. In addition, 550 ° C shown in FIG. 1 is for explaining a heat storage material having a high energy level by receiving thermal energy from a heat supply unit.
  • the other energy mentioned in the present invention may be any heat energy delivered from the heat storage material can be converted into other forms of energy, and electrical energy, potential energy, kinetic energy, and the like can be exemplified. Therefore, the heat conversion unit, the power generation unit may be a module, a device or a system for converting the form of the thermal energy, etc., which can refer to a variety of well-known documents, the structure, scale, details are not limited. As a specific example, as shown in FIG. 1, a heat transfer system for transferring heat energy to a solar thermal power generation system may be applied. Thermal energy transmitted from the heat conversion unit may be transferred to a device such as a turbine of a solar generator and converted into other energy.
  • the heat source mentioned in the present invention is not limited as long as it can provide thermal energy, incineration heat, waste heat and solar heat and the like can be exemplified. More specifically, the heat source may be exemplified by nuclear power generation, geothermal power generation, solar thermal power generation, cogeneration and thermal power generation.
  • the heat transfer system and power generation apparatus referred to in the present invention may be performed in a closed system or an open system.
  • thermodynamic movements such as transfer, storage, conversion to other energy, and the like of heat energy can proceed.
  • a heat transfer medium melt composition was prepared comprising 36 wt% KCl, 27 wt% Na 2 CO 3, 27 wt% K 2 CO 3 and 10 wt% NaOH. Also, the melting point of the composition was heated at a rate of 10 K / min using differential scanning calorimeters (DSC), and calorie change was measured. The result is shown in FIG.
  • a heat transfer medium melt composition was prepared comprising 36 wt% KCl, 36 wt% Na 2 CO 3 , 18 wt% K 2 CO 3 and 10 wt% NaOH.
  • the melting point of the composition was measured in the same manner as in Example 1, the results of which are shown in FIG.
  • a heat transfer medium melt composition was prepared comprising 20 wt% KCl, 40 wt% Na 2 CO 3, and 40 wt% K 2 CO 3 .
  • the melting point of the composition was measured in the same manner as in Example 1, the results of which are shown in FIG.
  • both the heat transfer medium melt compositions of Examples 1 and 2 have very low melting points of 270 ° C. or less, specifically about 265 ° C.
  • the heat transfer medium melting composition of Comparative Example 2 has a very high melting point of 450 ° C. or higher, specifically about 470 ° C. That is, NaOH is further included in the composition including KCl, Na 2 CO 3 and K 2 CO 3 to co-melt, so that the melting point is lowered by about 200 ° C. as compared with the case where NaOH is not included.
  • the width of the melting point range of Example 1, Example 2 and Example 3 is about ⁇ 5 °C centered around the peak temperature (265 °C), while in Comparative Example 2 In this case, it can be seen that the peak temperature is about ⁇ 70 ° C around the center (475 ° C). Therefore, it can be seen that in the case of Example 1 and Example 2, which further includes NaOH, the width of the melting point range is very narrow compared with that of Comparative Example 2, which does not contain NaOH.
  • compositions having a NaOH content of less than 51% by weight energy may be stored and released even if some unmelted portion is present at the melting point, and a relatively low NaOH content may further reduce corrosion induction of metals. It is suitable for heat transfer medium composition as a heat storage material.
  • the heat of melting increases rapidly from the 51% by weight portion, indicating that the entire composition is melted at the melting point, which is a very low temperature of 264 to 265 ° C.
  • the melting point also means that the entire composition is melted.
  • heat storage density is higher from high heat of fusion.

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Abstract

La présente invention concerne comme composition de fusion de milieu de transfert thermique, un système de transfert thermique l'utilisant, et un dispositif de production d'énergie utilisant le système de transfert thermique, la composition de fusion de milieu de transfert thermique comprenant un chlorure de métal alcalin, un premier carbonate de métal alcalin, un second carbonate de métal alcalin, et un hydroxyde de métal alcalin. Par conséquent, la composition de fusion de milieu de transfert thermique n'est pas corrosive vis-à-vis des métaux, présente un très bas point de fusion de 300 °C ou moins malgré une stabilité thermique élevée, et une très faible largeur dans la plage des points de fusion. En conséquence, le système de transfert thermique utilisant la composition de fusion de milieu de transfert thermique et le dispositif de production d'énergie utilisant le système de transfert thermique présentent une efficacité de conversion d'énergie et une efficacité de procédé très élevées.
PCT/KR2017/012638 2016-11-21 2017-11-09 Composition de fusion de milieu de transfert thermique, système de transfert thermique l'utilisant, et dispositif de production d'énergie utilisant le système de transfert thermique WO2018093091A1 (fr)

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EP17871327.7A EP3543312B1 (fr) 2016-11-21 2017-11-09 Composition de fusion de milieu de transfert thermique, système de transfert thermique l'utilisant, et dispositif de production d'énergie utilisant le système de transfert thermique
ES17871327T ES2942306T3 (es) 2016-11-21 2017-11-09 Composición fundente de un medio de transferencia de calor, sistema de transferencia de calor que usa el mismo, y dispositivo de generación de energía que utiliza el sistema de transferencia de calor

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KR10-2016-0154773 2016-11-21
KR20160154773 2016-11-21
KR10-2017-0057030 2017-05-04
KR1020170057030A KR101897463B1 (ko) 2016-11-21 2017-05-04 열전달 매체 용융 조성물 및 이를 이용한 열전달 시스템

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KR960001084B1 (ko) * 1992-12-29 1996-01-18 한국전기통신공사 교환기의 프로세서간 통신망에서 노드의 경보발생 노드 확인 방법
JPH11325769A (ja) * 1998-05-13 1999-11-26 Mitsubishi Chemical Corp 蓄熱式熱交換器
JP2016188347A (ja) * 2015-03-30 2016-11-04 綜研テクニックス株式会社 溶融塩型熱媒体

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960001084B1 (ko) * 1992-12-29 1996-01-18 한국전기통신공사 교환기의 프로세서간 통신망에서 노드의 경보발생 노드 확인 방법
JPH11325769A (ja) * 1998-05-13 1999-11-26 Mitsubishi Chemical Corp 蓄熱式熱交換器
JP2016188347A (ja) * 2015-03-30 2016-11-04 綜研テクニックス株式会社 溶融塩型熱媒体

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