Thermal characterization of HITEC molten salt for energy storage in solar linear concentrated technology

Fernández, Ángel G.; Galleguillos, Héctor R.; Fuentealba, Edward; Pérez, F.J.

doi:10.1007/s10973-015-4715-9

Cited by 82 publications

(29 citation statements)

References 8 publications

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“…The statement was approved that in addition of LiNO3 and Ca[NO3]2 into formula mixtures are able to reduce the melting point, improve the thermal stability and heat capacity of mixtures which can makes the resulting high heat capacity where it can see in this quaternary system [14]. It is important feature in molten salt system as heat transfer fluid that specific heat must be able to storing the greatest possible amount of energy as the lowest possible temperature in the salt system.…”

Section: Discussion Results To the Effect Of Calcium Nitratementioning

confidence: 99%

Effect of lithium nitrate and calcium nitrate composition on the thermal properties of quaternary molten salts mixture for heat transfer application

Ahmad

Yunos

Muhammad

et al. 2017

J. Phys.: Conf. Ser.

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Abstract.Mixed molten salt is considered as a promising medium for both heat transfer and energy storage in thermal power because of its many advantages such as low the melting point, large heat capacity, good thermal stability and low cost. In order to determine the thermal properties of the molten salt, the nitrate quaternary mixture of the molten salt are prepared based on the different composition of the lithium nitrate and calcium nitrate. The other salts in the mixture are potassium nitrate and sodium nitrate. Mixture of molten salts were heated in furnace at 150 for 4 hours and increased the temperature to 400 for 8 hours for homogenize the salt mixture. Then, decreased the temperature to 115 for an hour. The melting point and thermal stability of the mixture was determined by using thermogravimetric analysis [TGA] while the heat capacity was determined by using differential scanning calorimetry [DSC]. The lowest melting point using different composition of lithium nitrate, 10wt%NaNO3, 4Owt%KNO3, 20wt%Ca[NO3]2, 30wt%LiNO3 which is 97.1 while the heat capacity is 6.33 J/g . For the experiment using various composition of calcium nitrate, the lowest melting point is from 14wt% NaNO3 + 48wt% KNO3 + 13wt% LiNO3 + 25wt% Ca[NO3]2 which is 111.7 and the heat capacity is 2.06 J/g . From the result, the addition of lithium nitrate in the quaternary molten salts give more effect to the reduction of melting point value but higher heat capacity. IntroductionMolten salt is a means of storing heat at a high temperature. Molten salt is constituting of potassium nitrate, calcium nitrate, sodium nitrate, lithium nitrate. It has the property to absorb heat and to store the heat energy that is released to the water to transfer energy when needed. Molten salt that have high thermal energy storage capacity will increase the efficiency and enhance the performance for thermal energy storage. Thermal energy storage capacity of a salt mixture is dependent on melting point, density and specific heat capacity. Lower the melting point, more efficiency the molten salt. Then for thermal stability of the salt mixtures plays an important role in determining its utility as a potential thermal energy storage media. Nitrate mixtures and mixtures of nitrate and nitrite are being used in the applications because of low melting point, low unit cost, high heat capacity and moderate density which imply excellent energy storage capability. Binary mixtures of alkali molten nitrates or nitrites present phase diagrams with a

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Section: Discussion Results To the Effect Of Calcium Nitratementioning

confidence: 99%

Effect of lithium nitrate and calcium nitrate composition on the thermal properties of quaternary molten salts mixture for heat transfer application

Ahmad

Yunos

Muhammad

et al. 2017

J. Phys.: Conf. Ser.

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“…85 Zn-Sn@SiO 2 core-shell microparticles by hydrolysis (for SiO 2 coating) and thermal annealing (for Zn-Sn alloying). 86 Zn@Al 2 O 3 microparticles were dispersed in HITEC salt, 87 which is designed as a HTF in CSP plants. 85 The heat capacity of the salt could be enhanced by 6.7% by doping with 10 wt% Zn@Al 2 O 3 microparticles, while its viscosity increased from 1.3 to 3 cP in the temperature range of 350-550 C. 85 The authors dened thermal hysteresis (TH) in phase-change core-shell microparticles as the difference between the melting and crystallisation temperatures and it increased with an increase in shell thickness and heat-ramping rate.…”

Section: Micro/nano Encapsulation Of Low-melting-point Metals and Alloysmentioning

confidence: 99%

Micro- and nano-encapsulated metal and alloy-based phase-change materials for thermal energy storage

2021

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“…These eutectic mixtures would allow operating temperatures of 500 • C or higher [10,16]. The most widely considered candidates are Solar Salt, HiTec ® , and HiTec XL ® [12,18]. Solar Salt is a binary salt mixture of 60 wt.% NaNO 3 and 40 wt.% KNO 3 .…”

Section: Introductionmentioning

confidence: 99%

Feasibility Study of Freeze Recovery Options in Parabolic Trough Collector Plants Working with Molten Salt as Heat Transfer Fluid

et al. 2019

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Parabolic trough collector (PTC) technology is currently the most mature solar technology, which has led to the accumulation of relevant operational experience. The overall performance and efficiency of these plants depends on several components, and the heat transfer fluid (HTF) is one of the most important ones. Using molten salts as HTFs has the advantage of being able to work at higher temperatures, but it also has the disadvantage of the potential freezing of the HTF in pipes and components. This paper models and evaluates two methods of freeze recovery, which is needed for this HTF system design: Heat tracing in pipes and components, and impedance melting in the solar field. The model is used to compare the parasitic consumption in three molten salts mixtures, namely Solar Salt, HiTec, and HiTec XL, and the feasibility of this system in a freezing event. After the investigation of each of these subsystems, it was concluded that freeze recovery for a molten salt plant is possible.

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Thermal characterization of HITEC molten salt for energy storage in solar linear concentrated technology

Cited by 82 publications

References 8 publications

Effect of lithium nitrate and calcium nitrate composition on the thermal properties of quaternary molten salts mixture for heat transfer application

Effect of lithium nitrate and calcium nitrate composition on the thermal properties of quaternary molten salts mixture for heat transfer application

Micro- and nano-encapsulated metal and alloy-based phase-change materials for thermal energy storage

Feasibility Study of Freeze Recovery Options in Parabolic Trough Collector Plants Working with Molten Salt as Heat Transfer Fluid

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