Parametric analysis of a packed bed thermal storage device with phase change material capsules in a solar heating system application

• 作者: Long Gao Gegentana Junchao Bai Baizhong Sun Deyong Che Shaohua Li
• 来源期刊: 建筑模拟（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: Building Thermal, Lighting, and Acoustics Modeling
• 页码范围: 523-533
• 页数: 11页
• 语种: 英文

摘要

The goal of this study is to investigate the effect of key design parameters on the thermal performance of the packed bed heat storage device by numerical calculation. A one-dimensional, non-equilibrium packed bed latent heat storage mathematical model was established and the applicability of the model was verified. The results demonstrate that the inlet temperature of the heat transfer fluid (HTF) had the greatest influence on each index. When the inlet temperature increased from 333 K to 363 K, exergy destruction increased threefold, effective heat storage time decreased by 67％, effective heat storage increased by 38％, and exergy efficiency decreased by 11％. The decrease of the capsule diameter had a positive effect on each evaluation index. According to the sensitivity analysis, the order of importance of each parameter within their variation range was HTF inlet temperature, HTF flow rate, PCM capsule size and PCM initial temperature.