Thermophysical and heat transfer properties of phase change material candidate for waste heat transportation system

Kaizawa, Akihide; Maruoka, Nobuhiro; Kawai, Atsushi; Kamano, Hiroomi; Jozuka, Tetsuji; Senda, Takeshi; Akiyama, Tomohiro

doi:10.1007/s00231-007-0311-2

Cited by 136 publications

(62 citation statements)

References 15 publications

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“…For example, thermoelectric conversion for wall heat loss, [6][7][8][9] pre-heating of materials and steam generation for fluid sensible heat and radiation, etc. One of the attracting technologies is latent heat storage [10][11][12][13][14] that once stores thermal energy as latent heat of melting and then supplies it to the distant place with time-shift and flattened temperature level. Regarding the temperature level of the waste heat, high and middle temperature waste heats is able to be recovered fairly easily because the driving force in heat recovering process can be set high.…”

Section: Introductionmentioning

confidence: 99%

Development of Heat Exchanger with New Mechanism of Scraping Temperature Boundary Layer

2010

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Section: Introductionmentioning

confidence: 99%

Development of Heat Exchanger with New Mechanism of Scraping Temperature Boundary Layer

2010

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“…Recently, erythritol with a melting point of 118-119°C has been reported as a promising new PCM for applications in solar cookers 64,68) and for the recovery of waste heat at relatively low temperatures under 200°C. [53][54][55][56] Molten salts were the most popular PCMs, and they had a high phase-change point. In addition, several metallic materials have been proposed as PCMs with high phasechange points, 52,66) for applications in solar power generation systems and for the recovery of waste heat at high temperatures over 200°C.…”

Section: Classification Of Pcmmentioning

confidence: 99%

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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“…Second, the leakage behaviour of phase change composites under service temperature -another important property -determines durability and potential use in different applications. Kaizawa et al [13] showed that erythritol with a large latent heat of 344 kJ/kg at melting point of 117 C exhibited excellent chemical stability under repeated melting and solidifying cycles. On the other hand, the problem on leakage of melted organic PCMs could be improved by embedding a porous matrix-like porous ceramics.…”

Section: Introductionmentioning

confidence: 99%

Preparation, properties and thermal control applications of silica aerogel infiltrated with solid–liquid phase change materials

Zhou

Xiao

Feng

et al. 2012

Journal of Experimental Nanoscience

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In this study, silica aerogel saturated with erythritol as phase change materials (PCMs) was prepared by melt infiltration. The properties of the composite were determined by scanning electronic microscope (SEM), Fourier transformationinfrared spectroscope (FT-IR) and differential scanning calorimeter (DSC). In the novel composite, erythritol with high latent heat of fusion was used as PCM for thermal control, whereas nanoporous silica aerogel was prepared as the phase change matrix to provide structural strength and prevent leakage of the melted erythritol. Nitrogen gas adsorption curves and SEM analysis indicate that the pore structure of silica aerogel was porous and connected with each other. FT-IR analysis showed that the composite formation of silica aerogel and erythritol were physical, whereas DSC analysis showed that the melting point and heat storage capacity of the composite were 123.8 C and 289.92 kJ/kg, respectively. The thermal protection properties of phase change composites were designed under laboratory conditions using a thermal measurement setup of a simulated thermal environment of an aircraft. The phase change composite produced by the study can be used for thermal protection applications. Compared with the paraffin-silica aerogel composite, the erythritol-silica aerogel composite could rapidly control the rising temperature by absorbing heat under high thermal environments.

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Thermophysical and heat transfer properties of phase change material candidate for waste heat transportation system

Cited by 136 publications

References 15 publications

Development of Heat Exchanger with New Mechanism of Scraping Temperature Boundary Layer

Development of Heat Exchanger with New Mechanism of Scraping Temperature Boundary Layer

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

Preparation, properties and thermal control applications of silica aerogel infiltrated with solid–liquid phase change materials

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