Journal ArticleDOI
Comparative study of single and multi-layered packed-bed thermal energy storage systems for CSP plants
Ajas Abdulla,K.S. Reddy +1 more
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TLDR
In this paper, the effect of phase change materials (PCM) on the discharge duration of a multi-layer thermal energy storage (TES) system was analyzed for a storage tank operating between 563 and 663 K with bed dimensions of 12 and 14.38 m using solar salt as Heat Transfer Fluid (HTF).Abstract:
The Multi-layered Thermal Energy Storage (TES) tank consists of three regions–top and bottom part is packed with suitable Phase Change Materials (PCM) and low-cost pebbles are placed in the middle region, whereas entire tank portion is filled by solid fillers in Single-layered tank system. For a storage tank operating between 563 and 663 K with bed dimensions of 12 and 14.38 m using Solar salt as Heat Transfer Fluid (HTF), it is observed that the duration of discharge for multi-layered tank is 5.32 h whereas it is 4.19 h for single-layered tank with a Reynolds number of 10. The effect of intermediate melting temperature range of PCMs are also analyzed by taking PCMs with sharp as well as intermediate melting ranges. Further, comparison of single and multi-layered systems is carried out by analyzing the temperature profiles and width of both PCM layers. The width of top and bottom PCM layers of tank is varied from 0 to 30% to analyze its effect on the discharging duration. It is observed that multi-layered system provides extra discharge of 1 h with introduction of PCM at top and bottom with a width of 10%. Discharge duration increases with increase in PCM width whereas the percentage increase in duration of discharge with increase in PCM width is comparatively less. It is also seen that PCMs with sharp melting point performs better compared to one having intermediate range of melting temperatures. Multi-layered configuration concept offers best possibilities as integration to CSP plants with desired efficiency.read more
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Journal ArticleDOI
Recent developments in phase change materials for energy storage applications: A review
Hassan Nazir,Hassan Nazir,Mariah Batool,Mariah Batool,Francisco Javier Bolívar Osorio,Marllory Isaza-Ruiz,Xinhai Xu,K. Vignarooban,Patrick E. Phelan,Inamuddin,Inamuddin,Arunachala Mada Kannan,Arunachala Mada Kannan +12 more
TL;DR: In this article, the authors focus on the application of various phase change materials based on their thermophysical properties, in particular, the melting point, thermal energy storage density and thermal conductivity of the organic, inorganic and eutectic phases.
Journal ArticleDOI
Thermal energy storage (TES) with phase change materials (PCM) in solar power plants (CSP). Concept and plant performance
Cristina Prieto,Luisa F. Cabeza +1 more
TL;DR: In this article, a cascade type phase change materials (PCM) energy storage system for solar thermal electricity plants with its technical assessment is presented, using four buckets with the PCM organized based on melting temperature and the latent energy of the materials.
Journal ArticleDOI
4-E (Energy-Exergy-Environment-Economic) analyses of integrated solar powered jaggery production plant with different pan configurations
P. Venkata Sai,K.S. Reddy +1 more
TL;DR: In this paper, a solar powered jaggery industry with freeze pre-concentration is proposed with conventional and modified heating pans, which can mitigate nearly 2015.95 to 3062.15 tons of CO2 emission during its 25 years of lifespan under 300 clear days of operation each year.
Journal ArticleDOI
Stability analysis of the thermocline thermal energy storage system during high flow rates for solar process heating applications
K.S. Reddy,N. Pradeep +1 more
TL;DR: In this article, a thermal energy storage tank size of 1m height and 0.250m diameter with a 0.030m size of filler material packed with an average porosity of 0.3 for the storage capacity of 150kWh/m3 is used for solar process heating applications.
Journal ArticleDOI
Phase change material thermal energy storage design of packed bed units
Haobin Liang,Jianlei Niu,Ratna Kumar Annabattula,Kasireddy Siva Reddy,Ali Abbas,Minh Tri Luu,Yixiang Gan +6 more
TL;DR: In this article , the performance advantage of the packed bed PCM storage unit design is analyzed in comparison, and the impacts of key geometric parameters of a packed bed unit were numerically investigated.
References
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Journal ArticleDOI
State of the art on high temperature thermal energy storage for power generation. Part 1—Concepts, materials and modellization
Antoni Gil,Marc Medrano,Ingrid Martorell,Ana Lázaro,Pablo Dolado,Belén Zalba,Luisa F. Cabeza +6 more
TL;DR: In this article, the different storage concepts are reviewed and classified, and modellization of such systems is reviewed, and all materials considered in literature or plants are listed. But only a few plants in the world have tested high temperature thermal energy storage systems.
Journal ArticleDOI
Effect of fluid dispersion coefficients on particle-to-fluid mass transfer coefficients in packed beds. correlation of sherwood numbers
N. Wakao,T. Funazkri +1 more
TL;DR: In this article, the published heat transfer data obtained from steady and nonsteady measurements are corrected for the axial fluid thermal dispersion coefficient values proposed by Wakao and Funazkri.
Journal ArticleDOI
Effect of fluid dispersion coefficients on particle-to-fluid heat transfer coefficients in packed beds
N. Wakao,S. Kaguei,T. Funazkri +2 more
Journal ArticleDOI
Development of a Molten-Salt Thermocline Thermal Storage System for Parabolic Trough Plants
TL;DR: In this paper, the development of a thermocline system that uses molten-nitrate salt as the heat transfer fluid is described and compared to a two-tank molten salt system.
Journal ArticleDOI
Survey of Thermal Energy Storage for Parabolic Trough Power Plants
Ulf Herrmann,David Kearney +1 more
TL;DR: In this article, a literature review was carried out to evaluate the state of the art of thermal energy storage applied to parabolic trough power plants, where the heat transfer fluid (HTF) also serves as storage medium.
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