Thermal performance simulations of a packed bed cool thermal energy storage system using n-tetradecane as phase change material |
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| Authors: | Shuangmao Wu Guiyin Fang Xu Liu |
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| Affiliation: | 1. Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China;2. Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of MOE, School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;1. Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, School of Energy & Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China;2. Department of Earth and Environmental Engineering, Columbia University, New York, NY 10027, USA |
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| Abstract: | The objective of this paper is to study the thermal performance of latent cool thermal energy storage system using packed bed containing spherical capsules filled with phase change material during charging and discharging process. According to the energy balance of the phase change material (PCM) and heat transfer fluid (HTF), a mathematical model of packed bed is conducted. n-tetradecane is taken as PCM and aqueous ethylene glycol solution of 40% volumetric concentration is considered as HTF. The temperatures of the PCM and HTF, solid and melt fraction and cool stored and released rate with time are simulated. The effects of the inlet temperature and flow rate of HTF, porosity of packed bed and diameter of capsules on the melting time, solidification time, cool stored and released rate during charging and discharging process are also discussed. |
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