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High-temperature Thermal Properties and Wear Behavior of Basalt as Heat Storage Material for concentrated solar power Plants

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Journal of Wuhan University of Technology(Materials Science) 2022年第4期37卷 547-553页

作者： LIAO Jun ZHU Xupeng LI Jianan XUE Shuwen ZOU Changwei ZHANG Jun School of Physics Scienceand Technology Lingnan Normal UniversityZhanjang 524048China

The microstructures,components,thermal stability,specific heat capacity and thermal conductivity of basalt sample were ***,as a comprehensive result of thermal expansion and contraction process,both the friction coefficient and wear rate of the basalt sample were also *** results indicate that basalt is an excellent candidate to be used as thermal energy storage material for concentrated solar power plants,and also provide a strategy for solar energy utilization in volcanic area with excellent geographical environment.

关键词： thermal energy storage concentrated solar power basalt wear rate

Modelling and analysis of an 80-MW parabolic trough concentrated solar power plant in Sudan

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Clean Energy 2022年第3期6卷 512-527页

作者： Abdallah Adil Awad Bashir MustafaÖzbey Department of Mechanical Engineering Ondokuz Mayis UniversitesiSamsun 55139Turkey

concentrated solar power plants can play a significant role in alleviating Sudan’s energy *** plants can be established and implemented in Sudan,as their potential is considerably high due to the climate conditions in *** study investigates the design of a parabolic trough concentrated solar power plant in Sudan and analyzes its technical and economic *** simulation of the plant’s model used System Advisor Model(SAM)*** determine the best location for the construction of the plant,data from 15 cities in Sudan were compared with each other based on their solar radiation and land *** Halfa,a city in the northern region of Sudan,was chosen as the location due to its good topographical properties and climate *** results show that the proposed plant can generate 281.145 GWh of electricity annually with a capacity factor of 40.1%and an overall efficiency of 15%.Additionally,a simple cost analysis of the plant indicates a levelized cost of electricity of 0.155$/*** the study results are consistent with the characteristics of similar plants,the proposed plant is considered technically and economically feasible under the conditions at its location.

关键词： solar energy concentrated solar power parabolic trough collector System Advisor Model(SAM)simulation

Radiative cooling and cold storage for concentrated solar power plants

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Energy Storage and Saving 2022年第2期1卷 93-101页

作者： Ablimit Aili Gang Tan Xiaobo Yin Ronggui Yang Department of Mechanical Engineering University of ColoradoBoulderCO 80309USA Department of Civil and Architectural Engineering University of WyomingLaramieWY 82071USA School of Energy and power Engineering Huazhong University of Science and TechnologyWuhan430074China State Key Laboratory of Coal Combustion Huazhong University of Science and TechnologyWuhan430074China

concentrated solar power(CSP)plants are generally located in solar-abundant yet hot and water-stressed *** such circumstances,efficient but water-intensive once-through wet cooling and water-free but inefficient air cooling are both *** both thermal efficiency and water availability/temperature,recir-culating evaporative cooling is a better ***,evaporative cooling still loses large amounts of water into the atmosphere and thus requires a nonstop water ***,simultaneously reducing water loss and maintaining thermal efficiency requires efficient means of supplemental cooling for CSP ***-ing our previous work on scalable radiative cooling films and a kW-scale radiative cooling system,we explore the potential of consumptive water use reduction in recirculating wet-cooled CSP plants by integrating supplemental radiative cooling and cold *** modeling of a reference CSP plant with a supplemental radiative cooling system as large as the plant solar field,the results show that 40%-60%of the annual consumptive water use can be potentially reduced in the hot southwestern *** with daytime-only radiative cooling,whereas the annual potential water saving can be as much as 65%-85%if the radiative cooling system works both day and night with cold storage.

关键词： Radiative cooling power plant cooling concentrated solar power Water saving

Potential of performance improvement of concentrated solar power plants by optimizing the parabolic trough receiver

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Frontiers in Energy 2020年第4期14卷 867-881页

作者： Honglun YANG Qiliang WANG Jingyu CAO Gang PEI Jing LI Department of Thermal Science and Energy Engineering University of Science and Technology of ChinaHefei 230026China

This paper proposes a comprehensive thermodynamic and economic model to predict and compare the performance of concentrated solar power plants with traditional and novel receivers with different configurations involving operating temperatures and *** simulation results reveal that power plants with novel receivers exhibit a superior thermodynamic and economic performance compared with traditional *** annual electricity productions of power plants with novel receivers in Phoenix,Sevilla,and Tuotuohe are 8.5%,10.5%,and 14.4%higher than those with traditional receivers at the outlet temperature of 550℃.The levelized cost of electricity of power plants with double-selectivecoated receivers can be decreased by 6.9%,8.5%,and 11.6%.In Phoenix,the optimal operating temperature of the power plants is improved from 500℃to 560℃by employing a novel ***,the sensitivity analysis of the receiver heat loss,solar absorption,and freeze protection temperature is also conducted to analyze the general rule of influence of the receiver performance on power plants *** absorption has a positive contribution to annual electricity productions,whereas heat loss and freeze protection temperature have a negative effect on electricity *** results indicate that the novel receiver coupled with low melting temperature molten salt is the best configuration for improving the overall performance of the power plants.

关键词： concentrated solar power parabolic trough receiver heat loss solar energy annual performance

Overview of concentrated solar power

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Journal of Energy and power Engineering 2013年第12期7卷 2291-2299页

作者： Chukwubuikem Chukwuka Komla Agbenyo Folly Faculty of Engineering and the Built Environment University of Cape Town Rondebosch 7701 South Africa

CSP （concentrated solar power） has been viewed as the technology that if properly developed could lead to a large scale conversion of solar energy into electricity. CSP is a type of solar energy converter that is classified as thermal converter because the output power produced is a function of the operating temperature. The main components of a CSP plant are the solar field which is made up of the heliostat arrays, the receiver tower, the heat transfer fluid, the molten salt thermal energy storage tanks and the power conversion unit, which is made up of the turbine and the generator. The main advantage of CSP is that of a cheap thermal storage （i.e., molten salt storage） which makes it possible to dispatch power at a cost comparable to the grid electricity. Simulations run with the SAM （systems advisory model） developed by NREL （National Renewable Energy Laboratory） showed that CSP is capable of delivering electricity at the cost of 17UScents per kWh for the 30-year life of the plant. The main disadvantage of CSP however, is that of low efficiency （8%-16%）. There are ongoing research works to improve the efficiency of the CSP. One way to improve the efficiency is to increase the operating temperature of the system. In this paper, the authors discussed different modules of the CSP plant and suggested ways to improve on the conversion efficiencies of individual modules. Finally, an overall systems performance simulation is carried using SAM and the simulation results show that electricity can be produced using CSP at the cost of RI.05 per kWh.

关键词： concentrated solar power heliostat molten salt energy storage SAM (systems advisory model) LCOE (levelised cost ofelectricity) blackbody receiver/emitter.

Preliminary Design Study on concentrated solar power PVRs to Operate with RCBC

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Journal of Energy and power Engineering 2013年第1期7卷 88-95页

作者： Ramon Ferreiro Garcia Manuel Romero Gomezt Alberto DeMiguel Catoira Javier Romero Gomez Industrial Engineering Department E.T.S.N.M. A Coruna University A Coruna 15011 Spain Energy and Propulsion Department E.T.S.N.M. A Coruna University A Coruna 15011 Spain

Parabolic through concentrators and parabolic dish concentrators followed by a PVR （pressurized volumetric receiver） are proposed, studying the performance behavior of a RCBC （regenerative closed Brayton cycle） operating with helium or hydrogen. A pressurized gas such as helium circulates along the volumetric receiver, capturing the concentrated thermal solar energy to be further converted into electric power via a thermal cycle. The overall efficiency of the plant has been computed under variable parameters to determine the operating conditions for which efficiency and specific power are acceptable. As consequence of the proposed analysis, it is concluded that direct coupling between volumetric receivers and thermal engines renders high efficiency while avoiding an intermediate heat transfer medium.

关键词： Closed Brayton cycle concentrated solar power parabolic dish parabolic through volumetric receiver thermal efficiency working fluid.

A switchable concentrating photovoltaic/concentrating solar power(CPV/CSP)hybrid system for flexible electricity/thermal generation

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Science China(Technological Sciences) 2023年第8期66卷 2332-2345页

作者： PAN XinYu YUAN MengDi JU Xing XU Chao Key Laboratory of power Station Energy Transfer Conversion and System of Ministry of Education School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing 102206China

Due to the intermittency and indeterminacy of solar irradiance,balancing energy supply and load demand remains a *** paper proposed a switchable hybrid system that combines concentrating photovoltaic/concentrating solar power(CPV/CSP)technology with thermal energy storage(TES)to achieve flexible electricity and thermal generation by adjusting the incident solar flux of photovoltaic(PV).The hybrid system can directly transfer surplus solar energy into high-quality heat for storage using a rotatable PV/heat *** simulated results demonstrated that the hybrid system effectively improves power generation,optimally utilizes TES capacity,and reduces the levelized cost of electricity(LCOE).Over a selected seven-day period,the single-junction(1J)Ga As solar cells used in the hybrid system sustainably satisfied the load demand for more than five days without grid supplement,outperforming the CSP plant by an additional two *** hybrid system utilizing the 1J Ga As with the base configuration of solar multiple(SM)of 1.26 and TES capacity of 5 h improved the annual power production and renewable penetration(RP)by 20.8%and 24.8%compared with the conventional CSP plant,*** hybrid plant with monosilicon and a configuration of SM(1.8),PV ratio(1),and TES capacity(6 h)achieved an optimal LCOE of11.52$ct/k Wh and RP of 75.5%,which is 8.8%lower and 12.1%higher than the CSP plant,respectively.

关键词： concentrated photovoltaic concentrated solar power hybrid system flexible electricity/thermal ratio techno-economic analysis

Design and optimization of CSP power plants for Pakistan:a comparative study

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Clean Energy 2023年第3期7卷 690-704页

作者： Kashif Liaqat Juan C.Ordonez Department of Mechanical Engineering FAMU-FSU College of EngineeringEnergy and Sustainability Centerand Center for Advanced Power SystemsFlorida State UniversityTallahasseeFL 32310USA

Despite having very high solar irradiance,Pakistan still does not have any installed concentrated solar power(CSP)*** studies have shown that multiple locations within the country are suitable for CSP plants,but there is limited availability of comprehensive comparative ***,this article presents a comparative analysis of different CSP technologies in Pakistan,focusing on their potential to address the country’s energy *** study evaluates the pros and cons of different CSP technologies at various locations through site assessment,modelling,optimization and economic analysis using the System Advisor *** and Nawabshah were selected as the locations for modelling multiple scenarios of 100-MW plants,using central receiver systems,parabolic trough collectors and linear Fresnel *** plants were integrated with thermal energy storage and the storage capacity was optimized using parametric *** results showed that a central receiver system for the location of Quetta was the most favourable option,with an annual energy yield of 622 GWh at 7.44 cents/kWh,followed by a central receiver system for Nawabshah(608 GWh,9.03 cents/kWh).This study is the first to show that switching between line-concentrated and point-concentrated CSP technologies can open new opportunities for sites in Pakistan with relatively high solar resources,resulting in a 21.3%reduction in the levelized cost.

关键词： concentrated solar power parabolic trough collector linear Fresnel reflector central receiver System Advisor Model Pakistan

Multi-objective performance optimization&thermodynamic analysis of solar powered supercritical CO_(2)power cycles using machine learning methods&genetic algorithm

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Energy and AI 2024年第1期15卷 193-216页

作者： Asif Iqbal Turja Md Mahmudul Hasan M.Monjurul Ehsan Yasin Khan Department of Mechanical and Production Engineering(MPE) Islamic University of Technology(IUT)Board BazarGazipur1704Bangladesh

The present study is focused on multi-objective performance optimization&thermodynamic analysis from the perspectives of energy and exergy for Recompression,Partial Cooling&Main Compression Intercooling supercritical CO_(2)(sCO_(2))Brayton cycles for concentrated solar power(CSP)applications using machine learning *** novelty of this work lies in the integration of artificial neural networks(ANN)and genetic algorithms(GA)for optimizing the performance of advanced sCO_(2)power cycles considering climatic variation,which has significant implications for both the scientific community and engineering applications in the renewable energy *** methodology employed includes thermodynamic analysis based on energy,exergy&environmental factors including system performance *** system is modelled for net power production of 15 MW thermal output utilizing equations for the energy and exergy balance for each ***,thermodynamic model extracted dataset used for prediction&evaluation of Random Forest,XGBoost,KNN,AdaBoost,ANN and LightGBM ***,considering climate conditions,multi-objective optimization is carried out for the CSP integrated sCO_(2)power cycle for optimal power output,exergy destruction,thermal and exergetic *** algorithm and TOPSIS(technique for order of preference by similarity to ideal solution),multi-objective decision-making tool,were used to determine the optimum operating *** major findings of this work reveal significant improvements in the performance of the advanced sCO_(2)cycle by 1.68%and 7.87%compared to conventional recompression and partial cooling cycle,*** research could advance renewable energy technologies,particularly concentrated solar power,by improving power cycle designs to increase system efficiency and economic *** advanced supercritical CO_(2)power cycles in concentrated solar power plants might increase renewable energy use

关键词： Supercritical CO_(2) concentrated solar power Thermodynamic analysis Machine learning Artificial neural network Multi-objective optimization