Study on the efficiency of effective thermal conductivities on melting characteristics of latent heat storage capsules

Shiina, Yasuaki; Inagaki, Terumi

doi:10.1016/j.ijheatmasstransfer.2004.07.043

Cited by 46 publications

(14 citation statements)

References 9 publications

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“…It is also noteworthy that the prepared composite PCMs can more rapidly absorb heat supplied from a heat source compared with pure SA as PCM. Similar results were in agreement with the data obtained for the effect of enhanced thermal conductivity by using different heat transfer promoters on melting time of octadecane and Li 2 CO 3 as PCM by Shiina and Inagaki [26].…”

Section: Comparison Of Melting Timessupporting

confidence: 92%

Thermal conductivity improvement of stearic acid using expanded graphite and carbon fiber for energy storage applications

2007

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Section: Comparison Of Melting Timessupporting

confidence: 92%

Thermal conductivity improvement of stearic acid using expanded graphite and carbon fiber for energy storage applications

2007

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“…Thermal energy can be stored in four ways [7,8]: as sensible [9][10][11], latent [12][13][14][15][16][17], chemical [18][19][20], and sorption heat [21][22][23][24]. It has to be emphasized that the choice of a heat storage method will depend on the thermo-physical properties of the material used.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the heat storage density of silica–alumina by addition of hygroscopic salts (CaCl2, Ba(OH)2, and LiNO3)

Jabbari-Hichri

Bennici

Auroux

2015

Solar Energy Materials and Solar Cells

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“…Table 6 lists trends in research on PCM composites, together with the thermophysical properties and production methods of the proposed materials. 47,[93][94][95][96][97][98][99][100][101][102][103][104][105][106][107][108][109] The reported methods for the production of PCM composites can be classified into four types: (1) impregnation/infiltration (with/without vacuum process), (2) dispersion or kneading, (3) compression, and (4) electro-spinning.…”

Section: Pcm Compositesmentioning

confidence: 99%

“…This method can be used to easily produce LES mediums with large thermal conductivity and large density of heat storage by selecting porous materials with large thermal conductivity and large porosity, such as porous graphite materials 93,94) and various porous metals. [95][96][97] For applications in building materials and high-temperature processes, porous ceramics such as expanded perlite 98,99) and vermiculite 100) have also been reported.…”

Section: Pcm Compositesmentioning

confidence: 99%

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Technology of Latent Heat Storage for High Temperature Application: A Review

2010

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Table 2. Thermophysical properties of proposed PCM candidates-sugar alcohol, molten salt, and metallicwith phase-changing point over 100°C.from steelworks 2) has more enthalpy at lower temperature but more exergy at a higher temperature over 100°C. Table 3 lists frequently selected keywords from the collected papers. Papers on LHS and PCM frequently used general keywords such as "phase-change material", "PCM", "thermal energy storage", and "latent heat". Apart from these, interestingly, "solar energy" was also frequently used; these papers dealt with PCMs that can store solar energy through melting for various utilities. Keywords such as "phase-change composites", "thermal conductivity", "shape-stabilized" should be noteworthy in that these are related to general problems encountered during the use of PCMs, that is, capsulation and low thermal conductivity. Recent Advancements in LHS Technology PCM CapsulesGenerally, because LHS mainly utilizes the phase change between solid and liquid, the encapsulation of the PCM is necessary to avoid the leakage of a liquid PCM. In addition, Regin et al. 70) noted the functions and requirements of PCM containment: (i) meeting the requirements of strength, flexibility, corrosion resistance, and thermal stability; (ii) acting as a barrier to protect the PCM from harmful interactions with the environment; (iii) providing a sufficient surface for heat transfer, and (iv) providing structural stability and easy handling. PCM capsules are classified into macroand microcapsules.Macrocapsules are the most conventional PCM capsules, and many papers have reported various shell materials such as metal and plastics, and various shapes such as spherical [71][72][73][74][75] and cylindrical. 72,[76][77][78] In contrast, micro-encapsulation of PCM has recently attracted considerable attention [79][80][81][82][83][84][85] because it reduces the reactivity of the PCMs with the outside environment, increases the heat transfer area of the PCMs, and enables the core material to withstand frequent changes in the volume of the storage material during phase change. Table 4 lists trends in manufacturing methods for PCM capsules. Many papers have reported the production of various microcapsules, and the manufacturing methods, core PCM materials, shell materials, thermophysical properties, and capsule sizes of the same have been studied. Micro-interfacial polymerization, 80) in-situ polycondensation, [81][82][83][84][85] and complex coacervation 79) are the most popular microen- ISIJ International, Vol. 50 (2010), No. 9 79,80) 1232© 2010 ISIJ proposed the encapsulation of spherical metal PCMs such as Cu and Pb with an electroplated Ni layer to recover industrial hightemperature waste heat such as combustion offgas. The PCM spherical capsule with Ni coverage provided hybrid functions of both heat storage and catalysis. Nickel worked well as a catalyst of the gas phase reaction CH 4 ϩH 2 Oϭ 3H 2 ϩCO at 1000°C.In summary, the encapsulation of low-temperature PCMs is a state-of-the-art technology; in p...

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Study on the efficiency of effective thermal conductivities on melting characteristics of latent heat storage capsules

Cited by 46 publications

References 9 publications

Thermal conductivity improvement of stearic acid using expanded graphite and carbon fiber for energy storage applications

Thermal conductivity improvement of stearic acid using expanded graphite and carbon fiber for energy storage applications

Enhancing the heat storage density of silica–alumina by addition of hygroscopic salts (CaCl2, Ba(OH)2, and LiNO3)

Technology of Latent Heat Storage for High Temperature Application: A Review

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