High temperature solar receiver and thermal storage systems

Dutta, Pradip

doi:10.1016/j.applthermaleng.2017.06.028

Cited by 45 publications

(5 citation statements)

References 42 publications

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“…The latter is, arguably, the key component of a CSP system since it transfers the energy of the concentrated solar beams to a heat transfer fluid (HTF), which in turn, directly or indirectly drives the thermodynamic cycle [57]. Although CSP technologies present many advantages since they can produce electricity continuously even in the absence of sunlight, these systems have not had much commercial success compared with solar photovoltaics, mainly due to the higher LCOE [6]. Compared with solar PV, the electricity cost is at least three times higher [58].…”

Section: Solar Concentration Systemsmentioning

confidence: 99%

“…Even though photovoltaic systems have been considered the most appropriate technology to harness Angolan's solar resources, their intermittent character and unpredictable nature endanger the balance between supply and demand [5]. In order to overcome this situation, CSP combined with thermal energy storage was identified as a promising solution for the future of the worldwide energy sector [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Innovative Solar Concentration Systems and Its Potential Application in Angola

Constantino

Teixeira²,

Teixeira³

et al. 2022

Energies

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Energy demands have been increasing worldwide, endangering the future supply–demand energy balance. To provide a sustainable solution for future generations and to comply with the international goal to achieve Carbon Neutrality by 2050, renewable energies have been at the top of the international discussions, actively contributing to the energy transition and climatic policies. To achieve the international goal, Angola proposed a long-term strategy that promotes a fair and sustainable development of the national territory by means of improving the electric sector. Among all the renewable resources, solar energy is found to be the most promising solution since it has the second major renewable energy potential in Angola. However, the main problem related to solar energy is the efficiency of the solar systems and the electrical and thermal energy storage. As part of the solution, Concentration Solar Power (CSP) can make a sounder contribution to the transformation of the Angolan energy sector since it enables a significant increase in energy intensity through the concentration of solar energy. Moreover, the large applicability of this technology can contribute to the development of the rural regions which still struggle for energy equity. By considering the potential of CSP, this work presents the status of the Angolan energy sector, and focus is provided on the solar potential of the country. The advantages of the CSP technologies with emphasis on the parabolic dish systems are presented, and the contribution and innovative solutions for the enhancement of thermal efficiency are presented.

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Section: Solar Concentration Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Innovative Solar Concentration Systems and Its Potential Application in Angola

Constantino

Teixeira²,

Teixeira³

et al. 2022

Energies

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“…In order to provide high temperature heat to solar thermochemical processes at night, thermal storage has been considered. The review of high temperature thermal energy storage systems [35], [36] is out of the scope of this work, but the goal is rather to highlight the technological possible connections between solar reactors and thermal storage for continuous operation. Proposed solutions can be divided into two main groups: indirect and direct heat supply.…”

Section: Figure 6: Principle Of the Solar Hybrid Biomass Gasificationmentioning

confidence: 99%

On the path toward day and night continuous solar high temperature thermochemical processes: A review

Rodat

Abanades

Boujjat

et al. 2020

Renewable and Sustainable Energy Reviews

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High temperature solar thermochemical processes for fuels and chemical commodities production have been studied for decades and their feasibility is now proven. However, industrial deployment is limited and one of the main reasons is that the variability of solar energy hinders a priori day and night continuous solar process operation. Nevertheless, solar intermittence is now very well managed for Concentrated Solar Power (CSP) electricity production. Indeed, thermal storage up to 600°C is demonstrated and CSP electricity is base-load capable. However, far beyond electricity, heat supply is the major need in industry. This work reviews the recent works published or patented in the field of continuous operation of high temperature solar thermochemical processes (>600°C). There is currently a strong commitment toward day and night solar processes operation since it could improve durability, quality of the products, efficiency and economics of such technologies. Indeed, industrial processes are mainly continuous and daily start up and shut down strongly limit the production capacity of the solar-driven processes, which represents a major lock for scale up. For the first time in this paper, day and night continuous high temperature solar processes are reviewed and categorized. The reported works show the great innovation activity in this field and the various options investigated to date. The main outcomes show that continuous heat supply is possible thanks to hybridization or thermal energy storage. Highlights: Round the clock high temperature solar thermochemical processes are reviewed  Hybridization (fuel, electricity) enables day and night operation  Hybrid solar/autothermal process can operate 24h a day  Heat storage can supply solar heat at night, either directly or indirectly  The solar flame concept is presented for continuous high temperature heat supply

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“…Conventional steam Rankine cycle operate at a temperature of less than 550 °C [1][2][3], based on a trade-off between material selection, safety and reliability of circulatory mediator and rotor speed of the turbomachinery accounting also for bearings and seals induced restrictions of operating temperatures and pressures [4][5][6]. In recent years, reliability combined with the high thermal efficiencies related advantages has led to an increasing attention to supercritical carbon dioxide (SCO 2 ) energy conversion system [7].…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of a small scale SCO₂ turbine rotor system with a shaft cooler

Gurgenci

Guan

et al. 2022

Mechanics & Industry

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The SCO2 turbine machines exchange energy through supercritical carbon dioxide. Their impeller has the features of high-temperature and −speed to enhance energy conversion efficiency, but the rotor needs to be cooled to be compatible with bearings and seals. The paper introduces a pivotal parameter optimization of a concentrating solar SCO2 turbine rotor and seeks to control the harmonic response amplitude while preserving the distance between the critical speed and the working speed. The optimization considers several parameters including bearing span, stiffness, effective mass and damping of the bearing hub, and gas film stiffness coefficients of the cooler. The optimization is accomplished using a multi-objective and −scale quantum harmonic oscillator algorithm (mMQHOA) that couples an information interaction algorithm and transfer matrix model. The application of information interaction accelerates the convergence speed of the objective functions. The verification results from the three-dimensional finite element (3D-FE) indicate that the non-dominant design reduces resonance amplitude of the disc by approximately 71.91%, while the critical frequency increases by about 34.33% in the direction away from the operating frequency, and imply a trade-off relationship between harmonic response amplitude and critical speed. It is further reveal that the increased gas film stiffness of cooler in the primary level interval (<1E6 N/m) has no significant effect on the harmonic response of the system. The optimization is based not only on the analysis of design parameters, but also focuses on the sensitivity of objective functions that can significantly affect dynamic performance. The models with a single variable of bearing span and film stiffness are investigated respectively, and then the sensitivity of the system response is analyzed. In addition, three different objective functions are proposed, with the purpose of constructing a universally applicable model that can be further used to optimize the analogous bearing rotor system.

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High temperature solar receiver and thermal storage systems

Cited by 45 publications

References 42 publications

Innovative Solar Concentration Systems and Its Potential Application in Angola

Innovative Solar Concentration Systems and Its Potential Application in Angola

On the path toward day and night continuous solar high temperature thermochemical processes: A review

Multi-objective optimization of a small scale SCO₂ turbine rotor system with a shaft cooler

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High temperature solar receiver and thermal storage systems

Cited by 45 publications

References 42 publications

Innovative Solar Concentration Systems and Its Potential Application in Angola

Innovative Solar Concentration Systems and Its Potential Application in Angola

On the path toward day and night continuous solar high temperature thermochemical processes: A review

Multi-objective optimization of a small scale SCO2 turbine rotor system with a shaft cooler

Contact Info

Product

Resources

About

Multi-objective optimization of a small scale SCO₂ turbine rotor system with a shaft cooler