A Numerical Study on the Charging Performance of a Cool Energy Storage System with Coil Pipes

作者：Wu S M; Fang G Y^*

来源：Energy Sources, Part A: Recovery, Utilization, and Environmental Effects , 2012, 34(11): 1027-1036.

DOI：10.1080/15567031003735337

• charging performance
• coil pipe
• cool storage
• n-tetradecane
• phase change material

The dynamic charging performances of a cool energy storage system with coil pipes were studied. The n-tetradecane was taken as phase change material and the aqueous ethylene glycol solution of 25% volumetric concentration was considered as a heat transfer fluid. A numerical model based on energy balance equations of the phase change material and the heat transfer fluid was developed to investigate the variations of temperatures of the phase change material and heat transfer fluid, solid fraction and cool storage rate with time during the charging process. The effects of the inlet temperatures and the flow rates of the heat transfer fluid on the outlet temperature of the heat transfer fluid, cool storage rate, and solid fraction were discussed. It is concluded that the higher flow rate of the heat transfer fluid or the lower inlet temperature of the heat transfer fluid result in the higher cool storage rate and less time for the charging process. It took about 5 h for the charging process with the cool storage capacity of 103 MJ.

• 出版日期2012
• 单位南京大学