scholarly journals Novel Molten Salts Thermal Energy Storage for Concentrating Solar Power Generation

2013 ◽  
Author(s):  
Ramana G. Reddy
Keyword(s):  
Power Generation ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Molten Salts ◽  
Solar Power ◽  
Concentrating Solar Power ◽  
Solar Power Generation

Exergetic and Exergoeconomic Analyses of a Parabolic Trough Solar Power Generation System

2018 ◽  
Author(s):  
Anming Wang ◽  
Ming Liu ◽  
Xiaoqu Han ◽  
Jiping Liu
Keyword(s):  
Power Generation ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Solar Power ◽  
Generation System ◽  
Parabolic Trough ◽  
Solar Power Generation ◽  
Power Generation System ◽  
Solar Field

As concentrating solar power technologies moves to maturity progressively, large-scale solar thermal power plants have gained increasing attention. The exergetic and exergoeconomic analyses allow indicating energy degradation of the component quantitatively and establishing the monetary value to all material and energy flows. Therefore, they have strong theoretical implications to the system optimization. A thermodynamic simulation model of a 50 MW parabolic trough solar power generation system and the related exergetic and exergoeconomic analyses were presented in this paper. The results of exergetic analysis showed that the component of the lowest exergy efficiency was solar field, and the efficiency only had approximate 22%. Moreover, the exergy efficiencies of thermal energy storage and power block were about 81% and 58% respectively. According to the exergoeconomic analysis, the exergoeconomic cost of electricity and output thermal energy of solar field and thermal energy storage varied respectively in the ranges of 0.1277–0.1322 $/kWh, 0.0427–0.0503 $/kWh, and 0.0977–0.1074 $/kWh when thermal energy storage capacity ranged from 4 hours to 12 hours.

Storing solar energy with chemistry: the role of thermochemical storage in concentrating solar power

2017 ◽  
Vol 19 (10) ◽  
pp. 2427-2438 ◽  
Author(s):  
Xinyue Peng ◽  
Thatcher W. Root ◽  
Christos T. Maravelias
Keyword(s):  
Power Generation ◽  
Energy Storage ◽  
Solar Energy ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Solar Power ◽  
Concentrating Solar Power

Concentrating solar power (CSP) with thermal energy storage has the potential for grid-scale dispatchable power generation.

Numerical Study of High Temperature Thermochemical Energy Storage Using Co3O4/CoO

2018 ◽  
Author(s):  
Nasser Vahedi ◽  
Qasim A. Ranjha ◽  
Alparslan Oztekin
Keyword(s):  
Power Generation ◽  
High Temperature ◽  
Energy Storage ◽  
High Temperatures ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Solar Power ◽  
Reactor Performance ◽  
Solar Power Generation ◽  
Bed Porosity

Large-scale solar power generation becomes feasible using concentrated solar power plants, as the received heat is collected at high temperatures compatible with power cycle operations. The main drawback of solar power generation is the intermittent nature of available solar irradiation, which results in a mismatch between collected heat and electrical demand. Thermal energy storage (TES) systems are the options to resolve this problem by storing excess heat during high solar irradiance and releasing at off-sun conditions. Thermochemical energy storage (TCES) systems have the potential to store the solar energy at high temperatures suitable for CSP plants’ operations because of the higher energy density of the TCES materials than those used for sensible and latent heat storage options. In TCES, the heat is stored in the form of thermo-chemical energy using an endothermic reaction and is released by carrying out the reverse exothermic reaction. TCES using cobalt oxide redox (reduction/oxidation) reaction is selected for this study because of its unique features suitable for high temperature thermal energy storage. A reactor with the cylindrical fixed bed is considered, in which air flows through the bed during charging and discharging modes. Air is used as heat transfer fluid (HTF) and as the reactant gas supplying oxygen. Transient mass and energy transport equations are solved along with reaction kinetics equations using finite element method. Charging and discharging processes are investigated. The effect of geometrical and operational parameters including the material properties on overall storage and retrieval process has been studied. It was shown that the bed porosity plays a dominant role in the reactor performance. The increase in the bed porosity improves the reactor performance for both charging and discharging mode.

scholarly journals LCOE Analysis of Tower Concentrating Solar Power Plants Using Different Molten-Salts for Thermal Energy Storage in China

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1394 ◽  
Author(s):  
Xiaoru Zhuang ◽  
Xinhai Xu ◽  
Wenrui Liu ◽  
Wenfu Xu
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Molten Salts ◽  
Electricity Generation ◽  
Solar Power ◽  
Chinese Government ◽  
Concentrating Solar Power ◽  
Levelized Cost Of Electricity ◽  
Grid Parity

In recent years, the Chinese government has vigorously promoted the development of concentrating solar power (CSP) technology. For the commercialization of CSP technology, economically competitive costs of electricity generation is one of the major obstacles. However, studies of electricity generation cost analysis for CSP systems in China, particularly for the tower systems, are quite limited. This paper conducts an economic analysis by applying a levelized cost of electricity (LCOE) model for 100 MW tower CSP plants in five locations in China with four different molten-salts for thermal energy storage (TES). The results show that it is inappropriate to build a tower CSP plant nearby Shenzhen and Shanghai. The solar salt (NaNO3-KNO3, 60-40 wt.%) has lower LCOE than the other three new molten-salts. In order to calculate the time when the grid parity would be reached, four scenarios for CSP development roadmap proposed by International Energy Agency (IEA) were considered in this study. It was found that the LCOE of tower CSP would reach the grid parity in the years of 2038–2041 in the case of no future penalties for the CO2 emissions. This study can provide support information for the Chinese government to formulate incentive policies for the CSP industry.

scholarly journals Life Cycle Assessment (LCA) of a Concentrating Solar Power (CSP) Plant in Tower Configuration with and without Thermal Energy Storage (TES)

2021 ◽  
Vol 13 (7) ◽  
pp. 3672
Author(s):  
Gemma Gasa ◽  
Anton Lopez-Roman ◽  
Cristina Prieto ◽  
Luisa F. Cabeza
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Energy Storage ◽  
Environmental Impact ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Molten Salts ◽  
Solar Power ◽  
Concentrating Solar Power ◽  
The Impact

Despite the big deployment of concentrating solar power (CSP) plants, their environmental evaluation is still a pending issue. In this paper, a detailed life cycle assessment (LCA) of a CSP tower plant with molten salts storage in a baseload configuration is carried out and compared with a reference CSP plant without storage. Results show that the plant with storage has a lower environmental impact due to the lower operational impact. The dependence on grid electricity in a CSP tower plant without storage increases its operation stage impact. The impact of the manufacturing and disposal stage is similar in both plants. When analyzed in detail, the solar field system and the thermal energy storage (TES) and heat transfer fluid (HTF) systems are the ones with higher impact. Within the storage system, the molten salts are those with higher impact. Therefore, in this study the impact of the origin of the salts is evaluated, showing that when the salts come from mines their impact is lower than when they are synthetized. Results show that storage is a key element for CSP plants not only to ensure dispatchability but also to reduce their environmental impact.

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