载冷剂温度及流速对螺旋管蓄冰性能影响的模拟研究

Simulation Study of Impact of Refrigerant Temperature and Flow Rate on Ice Storage Performance of Spiral Tube

本文运用ANSYS软件模拟螺旋管蓄冰装置的蓄冰过程,研究载冷剂入口温度及速度变化对蓄冰性能的影响。结果显示,入口温度从269 K到263 K每下降3℃,240 min内水溶液液相率降低约14%,载冷剂温度越低,蓄冰性能越佳。载冷剂入口流速由1 m/s提高至3 m/s,每提高1 m/s,装置蓄冰率大致降低2%,降低不显著,载冷剂入口流速对装置蓄冰性能影响较小。本文对螺旋管的结构提出了优化方案,为螺旋管蓄冰装置的最佳运行工况提供理论基础。

The software,ANSYS,was used to simulate the ice storage process of the spiral tube ice storage device.The impact of inlet refrigerant temperature and flow rate on the ice storage performance was studied in this paper.Results show that liquid fraction decreases by 14%in 240 minutes when the inlet temperature drops every 3℃from 269 K to 263 K.The result indicates the better ice storage performance at a lower temperature.Liquid fraction unnoticeably decreases by 2%when inlet flow rate rises every 1 m/s within the range of 1~3 m/s,which shows less important impact of inlet flow rate on ice storage performance.Meanwhile,the spiral tube structural optimization has been proposed as the theoretical basis for the optimal operating conditions.