Heat storage in eutectic alloys

Birchenall, C. E.; Riechman, Alan F.

doi:10.1007/bf02653497

Cited by 131 publications

(45 citation statements)

References 3 publications

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“…During manufacturing studies, we used a more readily manufactured surrogate of CuSi for compatibility testing. Our findings for the PCM generally agree with late 1970's work at NASA [7,8], though the final composition differs slightly.…”

Section: Discussionsupporting

confidence: 89%

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Metallic Phase Change Material Thermal Storage for Dish Stirling

et al. 2015

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Dish-Stirling systems provide high-efficiency solar-only electrical generation and currently hold the world record at 31.25%. This high efficiency results in a system with a high possibility of meeting the DOE SunShot goal of $0.06/kWh. However, current dish-Stirling systems do not incorporate thermal storage. For the next generation of non-intermittent and cost-competitive solar power plants, we propose adding a thermal energy storage system that combines latent (phase-change) energy transport and latent energy storage in order to match the isothermal input requirements of Stirling engines while also maximizing the exergetic efficiency of the entire system. This paper reports current findings in the area of selection, synthesis and evaluation of a suitable high performance metallic phase change material (PCM) as well as potential interactions with containment alloy materials. The metallic PCM's, while more expensive than salts, have been identified as having substantial performance advantages primarily due to high thermal conductivity, leading to high exergetic efficiency. Systems modeling has indicated, based on high dish Stirling system performance, an allowable cost of the PCM storage system that is substantially higher than SunShot goals for storage cost on tower systems. Several PCM's are identified with suitable melting temperature, cost, and performance.

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Section: Discussionsupporting

confidence: 89%

“…Birchenall et. al [7,8] previously identified the CuMgSi ternary as a leading candidate for CSP storage, and synthesized laboratory quantities after three attempts. Table 1 lists the candidates in priority order.…”

Section: Pcm Identification and Selectionmentioning

confidence: 99%

Metallic Phase Change Material Thermal Storage for Dish Stirling

et al. 2015

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“…Many references have provided direct thermophysical properties data to compare the qualities of PCMMs. The results show that Al-Si eutectic alloy possesses the highest value of latent heat [1,[4][5][6][7][8]. Owing to its good phase change properties, Al-Si alloy has been applied widely in the fields of high-temperature solar energy storage [9,10] and recycling industrial residual heat [5].…”

Section: Introductionmentioning

confidence: 94%

Comparison of structure and phase change characteristic of microencapsulated core/shell Al–Si alloy microparticles synthesized by two methods

Sui

et al. 2015

J Sol-Gel Sci Technol

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Pre-oxidation process and modification with silane coupling agent (SCA) of original Al-Si alloy particles were selected to synthesize inorganic microencapsulated core/shell Al-Si alloy microparticles based on the sol-gel technology, respectively. The microstructure and phase change characteristic were measured and investigated by means of Fourier transform infrared spectra, X-ray diffraction, scanning electron microscopy, thermogravimetry and differential scanning calorimeter. These two methods can both realize the microencapsulation and form stable dense a-Al 2 O 3 shell. It is speculated that the microencapsulated reason is mainly attributed to the change in surface electric behaviors of Al-Si alloy particles according to the results of zeta potential measure. The latent heats are 416.92 and 307.21 kJ/kg for specimens treated by pre-oxidation and the modification of SCA, respectively. The latter renders thicker and more uniform shell layer. Graphical Abstractalumina gel particles

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“…Several studies have been reported on the thermophysical properties of different metals and alloys as PCMs [17][18][19][20][21]. It was reported that the large latent heat on a mass or volume basis were obtained in binary and ternary alloys with abundant elements Al, Cu, Mg, Si, and Zn M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 [22], but not all of the metallic materials are suitable as PCMs for use in TES systems because of some drawbacks of physical and chemical properties such as high vapor pressure, short-term chemical stability, and fire hazard.…”

Section: Introductionmentioning

confidence: 99%

Aluminum and silicon based phase change materials for high capacity thermal energy storage

Wang

et al. 2015

Applied Thermal Engineering

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Heat storage in eutectic alloys

Cited by 131 publications

References 3 publications

Metallic Phase Change Material Thermal Storage for Dish Stirling

Metallic Phase Change Material Thermal Storage for Dish Stirling

Comparison of structure and phase change characteristic of microencapsulated core/shell Al–Si alloy microparticles synthesized by two methods

Aluminum and silicon based phase change materials for high capacity thermal energy storage

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