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

scholarly journals Recent Investigations of Phase Change Materials Use in Solar Thermal Energy Storage System

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Qianjun Mao ◽  
Ning Liu ◽  
Li Peng
Keyword(s):  
Energy Storage ◽  
Melting Point ◽  
Phase Change ◽  
Latent Heat ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Heat Storage ◽  
Solar Thermal Energy ◽  
Temperature Heat

Solar thermal energy storage (TES) is an efficient way to solve the conflict between unsteady input energy and steady output energy in concentrating solar power plant. The latent heat thermal energy storage (LHTES) system is a main method of storing thermal energy using phase change materials (PCMs). Thermal properties, that is, melting points and latent heat, are the key parameters of PCMs for the TES system. In this paper, the PCMs are classified into inorganic and organic by the chemical composition, and according to the melting point, the inorganic PCMs can be divided into three contributions: low-temperature heat storage (less than 120°C), medium-temperature heat storage (120–300°C), and high-temperature heat storage (more than 300°C). The present article focuses mainly on the recent investigations on the melting point and latent heat of PCMs via DSC setup in the solar TES systems. The results can provide a good reference for the selection and utilization of PCMs in the solar TES systems.

Thermal Stability of FeS2 Cathode Material in “Thermal” Batteries: Effect of Dissolved Oxides in Molten Salt Electrolytes

2008 ◽  
Vol 63 (9) ◽  
pp. 596-602 ◽  
Author(s):  
Patrick J. Masset
Keyword(s):  
Thermal Stability ◽  
Liquid Phase ◽  
Cathode Material ◽  
Molten Salt ◽  
Molten Salts ◽  
Decomposition Temperature ◽  
Lithium Oxide ◽  
Thermal Batteries ◽  
Molten Salt Electrolytes ◽  
Thermal Stability Of

The thermal stability of FeS2 cathode material for thermal batteries is investigated in the LiCl-KCl eutectic containing up to 10 wt% Li2O (used as anti-peak). The results show that the decomposition of pyrite shifts to higher temperatures in the presence of molten salts as the S2 gas is repressed by the liquid phase. For high lithium oxide contents the decomposition temperature of pyrite decreases by 100 °C. In addition Li2FeS2 as reaction product is evidenced whereas Li3Fe2S4 is expected from literature data.

Preparation and Heat Transfer/Thermal Storage Properties of High-Temperature Molten Nitrate Salts

2015 ◽  
Vol 814 ◽  
pp. 60-64
Author(s):  
Hong Tao Zhang ◽  
You Jing Zhao ◽  
Jing Li Li ◽  
Li Jie Shi ◽  
Min Wang
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Melting Point ◽  
Latent Heat ◽  
Sodium Nitrate ◽  
Molten Salts ◽  
Operating Temperature ◽  
Potassium Nitrate ◽  
Nitrate Salts ◽  
Latent Heat Of Melting

The thermal stability of molten salts, operating temperature range and latent heat of melting for the molten salts at high temperature have been studied in the present investigation. The multi-component molten salts composed of purified potassium nitrate, purified sodium nitrate were prepared by statical mixing method [1]. The stability experiments were carried out at 500 to 600°C, and the experimental result showed that the purified nitrate molten salts performed better high-temperature thermal stability and its optimum operating temperature was increased from 500°C to 550°C. DSC analysis indicated that the purified nitrate molten had a lower melting point and a higher phase change latent heat. The melting point of purified binary nitrate molten salts was sharp decreased to 225.2°C and latent heat of melting for molten salts was also reduced from 78.41J/g to 81.15J/g compared with unpurified nitrate salts. Besides, the change in the concentration of impurities by analyzing in the binary molten salts, and combination of XRD test results can be found that the degree of degradation reduce and improve the thermal efficiency of the storage of binary molten salts by purified sodium nitrate and potassium nitrate.

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.

Controllable phase transformation and improved thermal stability of nickel on tungsten substrate by electrodeposition

2019 ◽  
Vol 35 (5) ◽  
pp. 727-732
Author(s):  
Minjie Xu ◽  
Chao Hu ◽  
Haiyan Xiang ◽  
Haozi Lu ◽  
Travis Shihao Hu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Phase Transformation ◽  
Thermal Stability Of ◽  
Tungsten Substrate
Sign in / Sign up

Export Citation Format

Share Document