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Modeling and Optimization of a Solar Thermal Storage for Concentrating Solar Power Plants
Shamsi, Hamid Reza | 2015
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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 47782 (46)
- University: Sharif University of Technology
- Department: Energy Engineering
- Advisor(s): Boroushaki, Mehrdad
- Abstract:
- One of the main components of any solar power plant is the heat storage. Implementing heat storage reduc-es the cost of power generation by increasing the capacity factor of the system. This Thesis aims to analyze the operation of heat storages by modeling latent heat
storage. In this regard, an efficient method named "Method of Characteristics" is utilized. Models developed based on this method are possible to be used for comparison, sensitivity analysis, and optimization due to their low computation time. Sensitivity analysis was carried out based on various parameters such as void fraction, fiUer material size. Results show that using latent heat storage, storage c-apacity is increased 3 times while the storage outlet temperarure is more stabled which is more desirable for power applic.ations. One way to improve the performance of latent heat storages is using a consecutive multi-layer PCM. This storage is named Casc.ade Latent He.at Storage (CLHS). PCM t)'pe, the plac-ement and quantity of PCMs are optimized using genetic algorithm with two different sc-enarios. Optimization results show that using a combination of PCMs as cascade can increase the stored energy in 4-hours charge period 5.12%. Based on the second sc-enario of optimization, utilizing CLHS leads to 5% increase in energy discharged in comparison to the best c.ase of Single-PCM storage for 11 8-hour charge-discharge cycle.
- Keywords:
- Numerical Simulation ; Phase Change Material (PCMs) ; Optimization ; Heat Transfer ; Energy Storage ; Solar Energy
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