scholarly journals Microscopic origins of conductivity in molten salts unraveled by computer simulations

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Marie-Madeleine Walz ◽  
David van der Spoel
Keyword(s):  
Computer Simulations ◽  
Molten Salts ◽  
Power Plants ◽  
Chemical Properties ◽  
Negative Electrode ◽  
Transference Numbers ◽  
Energy Applications ◽  
Physico Chemical ◽  
Solar Power Plants ◽  
Thermal Energy Storage Systems

AbstractMolten salts are crucial materials in energy applications, such as batteries, thermal energy storage systems or concentrated solar power plants. Still, the determination and interpretation of basic physico-chemical properties like ionic conductivity, mobilities and transference numbers cause debate. Here, we explore a method for determination of ionic electrical mobilities based on non-equilibrium computer simulations. Partial conductivities are then determined as a function of system composition and temperature from simulations of molten LiFαClβIγ (with α + β + γ = 1). High conductivity does not necessarily coincide with high Li+ mobility for molten LiFαClβIγ systems at a given temperature. In salt mixtures, the lighter anions on average drift along with Li+ towards the negative electrode when applying an electric field and only the heavier anions move towards the positive electrode. In conclusion, the microscopic origin of conductivity in molten salts is unraveled here based on accurate ionic electrical mobilities and an analysis of the local structure and kinetics of the materials.

scholarly journals Concentrated Solar Power Plants with Molten Salt Storage: Economic Aspects and Perspectives in the European Union

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Andrzej Bielecki ◽  
Sebastian Ernst ◽  
Wioletta Skrodzka ◽  
Igor Wojnicki
Keyword(s):  
Molten Salt ◽  
Molten Salts ◽  
Power Plants ◽  
Solar Power ◽  
Economic Aspects ◽  
The European Union ◽  
Concentrated Solar Power ◽  
Eu Legislation ◽  
Solar Power Plants ◽  
Concentrated Solar Power Plants

Concentrated solar power plants belong to the category of clean sources of renewable energy. The paper discusses the possibilities for the use of molten salts as storage in modern CSP plants. Besides increasing efficiency, it may also shift their area of application: thanks to increased controllability, they may now be used not only to cover baseload but also as more agile, dispatchable generators. Both technological and economic aspects are presented, with focus on the European energy sector and EU legislation. General characteristics for CSP plants, especially with molten salt storage, are discussed. Perspectives for their development, first of all in economic aspects, are considered.

PreFlexMS: Predictable Flexible Molten Salts Solar Power Plants

Impact ◽  
2017 ◽  
Vol 2017 (3) ◽  
pp. 58-60 ◽  
Author(s):  
Vipluv Aga ◽  
Carlos F Peruchena
Keyword(s):  
Molten Salts ◽  
Power Plants ◽  
Solar Power ◽  
Solar Power Plants

scholarly journals The Effects of Nanoparticles on the Specific Heat Capacity of Molten Salts

2018 ◽  
Vol 5 ◽  
pp. 56-65
Author(s):  
Alexander Foldi ◽  
Duy Khang Simba Nguyen ◽  
Yeong Cherng Yap
Keyword(s):  
Heat Capacity ◽  
Thermal Properties ◽  
Specific Heat ◽  
Molten Salt ◽  
Specific Heat Capacity ◽  
Molten Salts ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Efficiency Increase ◽  
Solar Power Plants

The desire to increase the efficiency of existing renewable energy sources has been thoroughly researched over the past years. This meta study aimed to investigate existing methods used by previous researchers to increase the Specific Heat Capacity of Molten Salt used for Concentrated Solar Power Plants. Investigations into nanoparticles were explored because of the effect of particle size and concentration can potentially increase the specific heat capacity of the molten salt. Numerous nanoparticles have shown to improve the thermal properties such as Silica (SiO2), Alumina (Al2O3), Titania (TiO2). Our summation was that the addition of nanoparticles into Molten Salts shows an increase in desired thermal properties of the Molten Salts. An efficiency increase of up to 28% was noted in the SHC (Cp) of the Molten Salts when Nanoparticles of 60nm were introduced.

scholarly journals REVIEW AND EVALUATION OF NANOFLUIDS AS PROSPECT THERMAL ENERGY STORAGE MATERIAL FOR CONCENTRATED SOLAR POWER APPLICATION

2020 ◽  
pp. 10-29
Author(s):  
C.L. Majadas ◽  
J.M. Peñaloga ◽  
R.W. Salvador
Keyword(s):  
Thermal Conductivity ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Power Plants ◽  
Solar Power ◽  
Concentrated Solar Power ◽  
Solar Power Plants ◽  
Thermal Energy Storage Systems ◽  
Concentrated Solar Power Plants

Solar energy intermittency is one of the main challenges encountered by thermal energy storage systems in concentrated solar power plants due to the low heat transfer rates during charging operations. The critical thermophysical property to be considered for combating this problem is the thermal conductivity. Thus, base fluids with dispersed nanoparticles, better known as nanofluids, have become materials with great potential since they enhance efficiency during charging intervals by increasing the charged material's thermal conductivity by up to 89 %. By gathering and analyzing results from various studies in nanofluids, it was observed that there is a considerable improvement in the thermal storage material compared with the base fluid alone. There is also an increase in the thermal conductivity as nanoparticles are added. Obtaining an increase as great as 99 % allows faster rates of heat transfer. Overall, this may significantly improve the efficiency of thermal energy storage systems in concentrated solar power plants.

scholarly journals Chemical and Pyrolytic Thermogravimetric Characterization of Nigerian Bituminous Coals

2016 ◽  
Vol 62 (3) ◽  
pp. 1-5 ◽  
Author(s):  
Bemgba Bevan Nyakuma ◽  
Aliyu Jauro
Keyword(s):  
Chemical Properties ◽  
Clean Energy ◽  
Coal Pyrolysis ◽  
Energy Applications ◽  
High Heating Value ◽  
Coal Deposits ◽  
Physico Chemical ◽  
Coal Classification ◽  
Higher Rank ◽  
Bituminous Coals

Abstract The discovery of new coal deposits in Nigeria presents solutions for nation’s energy crises and prospects for socioeconomic growth and sustainable development. Furthermore, the quest for sustainable energy to limit global warming, climate change, and environmental degradation has necessitated the exploration of alternatives using cleaner technologies such as coal pyrolysis. However, a lack of comprehensive data on physico-chemical and thermal properties of Nigerian coals has greatly limited their utilization. Therefore, the physico-chemical properties, rank (classification), and thermal decomposition profiles of two Nigerian bituminous coals – Afuze (AFZ) and Shankodi-Jangwa (SKJ) – were examined in this study. The results indicate that the coals contain high proportions of C, H, N, S, O and a sufficiently high heating value (HHV) for energy conversion. The coal classification revealed that the Afuze (AFZ) coal possesses a higher rank, maturity, and coal properties compared to the Shankodi-Jangwa (SKJ) coal. A thermal analysis demonstrated that coal pyrolysis in both cases occurred in three stages; drying (30-200 °C), devolatilization (200-600 °C), and char decomposition (600-1000 °C). The results also indicated that pyrolysis at 1000 °C is not sufficient for complete pyrolysis. In general, the thermochemical and pyrolytic fuel properties indicate that the coal from both places can potentially be utilized for future clean energy applications.

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