Nanomaterials Enhanced Heat Storage in Molten Salts

2021 ◽  
pp. 153-169
Author(s):  
Xiaotong Guo ◽  
Di Hu ◽  
Linpo Yu ◽  
Lan Xia ◽  
George Z. Chen
Keyword(s):  
Molten Salts ◽  
Heat Storage

On the performance of CSP oil-cooled plants, with and without heat storage in tanks of molten salts

Energy ◽  
2015 ◽  
Vol 83 ◽  
pp. 230-239 ◽  
Author(s):  
Fabrizio De Luca ◽  
Vittorio Ferraro ◽  
Valerio Marinelli
Keyword(s):  
Molten Salts ◽  
Heat Storage

Study on Modification of Hitec Molten Salt and its Properties Tests

2014 ◽  
Vol 1073-1076 ◽  
pp. 66-72
Author(s):  
Wei Zhai ◽  
Guang Ming Liu ◽  
Fei Yu ◽  
Yuan Kui Wang
Keyword(s):  
Thermal Stability ◽  
Phase Transformation ◽  
Melting Point ◽  
Molten Salt ◽  
Latent Heat ◽  
Molten Salts ◽  
Heat Storage ◽  
Heat Of Fusion ◽  
Temperature Heat ◽  
Thermal Stability Of

In this paper, additive A and additive B were added into Hitec molten salts in order to optimize the properties of the molten salt. The melting point, latent heat of phase transformation, specific heat capacity, thermal gravity, and thermal stability of the modified Hitec molten salt was characterized. The results showed that compare to Hitec molten salt the modified Hitec molten salt showed low melting point, proper latent heat of phase transformation, greater heat of fusion, wide using temperature range and other advantages. The modified molten salt had good thermal properties and thermal stability. This modified Hitec molten salt has good application prospect in the aspect of high temperature heat storage/transfer.

A Literature Review on Novel Nitrate Molten Salt for Heat Storage

2021 ◽  
Vol 881 ◽  
pp. 87-94
Author(s):  
Jin Hua Chen
Keyword(s):  
Thermal Stability ◽  
Heat Capacity ◽  
Melting Point ◽  
Specific Heat ◽  
Molten Salt ◽  
Specific Heat Capacity ◽  
Molten Salts ◽  
Heat Storage ◽  
Stability Limit ◽  
Capacity Enhancement

Reducing the melting point, in creasing the thermal stability limit, and enhancing the specific heat capacity of molten salt are the research hotspots in the field of medium and high temperature energy storage in recent years. From the perspectives of the melting point, thermal stability limit, and specific heat capacity of nitrates, we summarize the melting point, thermal stability limit, and specific heat capacity enhancement of molten salts with different compositions and ratios. The melting points of molten salt with different compositions and ratios are compared. Furthermore, the enhancing effect of various nanomaterials on molten salt is elucidated. The application of nitrate molten salt is also summarized to provide a reference for the research and application of novel molten salts. Keywords: Nitrate Molten Salt; Melting Point; Thermal Stability Limit; Specific Heat Capacity; Application

The Experimental Research and Numerical Simulation on Thermal Properties of Molten Salt at Melting Point

2009 ◽  
Author(s):  
Yannan Liang ◽  
Jiemin Zhou ◽  
Ying Yang ◽  
Ye Wu ◽  
Yanyan He
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Thermal Properties ◽  
Phase Change ◽  
Molten Salts ◽  
Phase Change Materials ◽  
Heat Storage ◽  
Phase Interface ◽  
Measuring System ◽  
Solid Liquid

The use of phase-change materials for latent heat storage is a new type of environmentally-friendly energy-saving technologies. Molten salts, one kind of phase-change materials, which have high latent heats, and whose phase transition temperatures match the high temperatures of heat engines, are the most widely used high-temperature phase-change heat storage materials. However, the heat transfer at solid/liquid phase interface belongs to Micro/Nanoscale Heat transfer, lots of the thermal properties of molten salt at melting point is difficult to test. In this investigation, based on the theory that the thermal conductivity can be determined by measuring the speed of the propagation of the solid/liquid phase interface during phase change, a set of system is developed to investigate the thermal conductivity of molten salts at liquid/solid phase transformation point. Meanwhile, mathematical calculation is applied to intuitively simulate the melting and solidifying process in the phase change chamber, by which the error could be analyzed and partly corrected and the result precision could also be increased. And a series of verification experiments have been performed to estimate the precision and the applicability of the measuring system to evaluate the feasibility of the method and measuring system. This research will pave the way to the follow-on research on heat storage at high temperature in industry.

Nox emission of ternary nitrate molten salts in high-temperature heat storage and transfer process

2019 ◽  
Vol 236 ◽  
pp. 147-154
Author(s):  
Xiaolan Wei ◽  
Bo Qin ◽  
Chuntao Yang ◽  
Weilong Wang ◽  
Jing Ding ◽  
...  
Keyword(s):  
High Temperature ◽  
Transfer Process ◽  
Molten Salts ◽  
Heat Storage ◽  
Nox Emission ◽  
Temperature Heat

Use of Silica Coated Zinc Nanoparticles for Enhancement in Thermal Properties of Carbonate Eutectic Salt for Concentrated Solar Power Plants

2020 ◽  
Author(s):  
Syed Muhammad Mujtaba Rizvi ◽  
Yousof Nayfeh ◽  
Baha El Far ◽  
Donghyun Shin
Keyword(s):  
Heat Transfer ◽  
Thermal Properties ◽  
Molten Salts ◽  
Solar Power ◽  
Heat Storage ◽  
Renewable Energy Sources ◽  
Thermal Storage ◽  
Transfer System ◽  
Concentrated Solar Power ◽  
Zinc Nanoparticles

Abstract Concentrated Solar Power (CSP) is one of the most efficient mega-scale renewable Energy sources. However, the overall cost of energy production is not viable for commercial usage and supplanting with fossil fuels or energy produced by nuclear ways. Its operational cost mainly lies in the electrical and thermal systems of the plant. The thermal system comprises of heat storage and heat transfer system. Any enhancement to heat storage or transfer system will directly reduce the cost of operation and increase the yield. Conventionally, oils stable up to 400C were used to transfer and store heat, however more recently, molten salts have been operational in the field for purpose of heat transfer but still, their thermal storage and conduction are limited. The current work explores the possibility of boosting the thermal storage capacity of molten salts through the latent heat of added phase change materials and increasing the specific heat at the same time by adding silica encapsulated zinc nanoparticles. We studied the advantage of adding coated Zn nano-sized particles to carbonate eutectic mixture for enhanced thermal energy storage and heat capacity enhancement. Zinc particles (40nm–60nm) obtained from the commercial sources were coated with silica shells using the solgel process under alkaline conditions. The nano-capsules were then dispersed in a mixture of carbonate salts. A differential scanning calorimeter was employed to characterize the thermal properties of the mixture. Tranmission electron miocroscopy was employed to characterize nanoparticles and electron diffraction Spectroscopy was performed to characterize materials and strcutures involved.

scholarly journals Experimental research on latent heat characteristics of binary mixed molten salt

2021 ◽  
Vol 260 ◽  
pp. 03026
Author(s):  
Wei Wang ◽  
Tao Xiong ◽  
Yuting Wu ◽  
Chongfang Ma
Keyword(s):  
Molten Salt ◽  
Melting Temperature ◽  
Latent Heat ◽  
Molten Salts ◽  
Heat Storage ◽  
Mass Ratio ◽  
Latent Heat Storage ◽  
Initial Melting ◽  
Heat Value ◽  
Halogen Salts

At present, thermal storage is considered as one of the key technologies to alleviate the problem of instability and intermittence for renewable energy. Due to relatively high latent heat, latent heat storage by molten salt is considered to a potential technology. Because of the restriction of different thermophysical parameters, the application of latent heat storage by molten salt has many technical obstacles. So, it is an urgent work to find a better mixed molten salt formula with comprehensive thermophysical properties. In this paper, we selected halogen salts (NaCl, NaF) and alkali (NaOH) to prepare binary mixed molten salts. From the results, for the mixed molten salt of NaCl-NaOH, NaCl:NaOH=1:9 has a maximum latent heat value of 301.2J/g. The initial melting temperature is about 200°C. With the increase of the mass ratio of NaCl, the termination melting temperature increases firstly then decreases. For mixed molten salt of NaF-NaOH, NaF:NaOH=1:9 has a maximum latent heat value of 199.5J/g, the initial and termination melting temperatures are about 265°C and 380°C, repectively. The latent heat value of NaCl-NaOH and NaF-NaOH mixed molten salts decreased with the increase of the mass ratio of halogen salts.

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