Numerical simulation of internal heat transfer characteristics in a shell and tube cascade phase change heat storage device used in mariculture
ZHOU Hao1,2, LI Zhenyi3, CAI Qinglin2, REN Xiaozhong1,2, BI Chunwei4, ZHONG Dong1,2*,LIU Ying1,2*
1.College of Marine Technology and Environment, Dalian Ocean University, Dalian 116023, China; 2.Key Laboratory of Environment Controlled Aquaculture, Ministry of Education, Dalian 116023, China; 3.The Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266000, China; 4.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
Abstract: An efficient cascade thermal energy storage with phase change materials is designed for mariculture industry in order to solve the problem of solar energy discontinuity and instability in mariculture. The numerical simulation of the heat transfer characteristics in the system is carried out, and the heat transfer characteristics of the upper, middle and lower parts of phase change materials (PCM) are discussed at each stage under the same working condition. At the same time, the difference in heat transfer characteristics in the same position of each PCM is also explored in the cascade thermal energy storage. The results showed that the heat conduction is the dominant factor in the early stage of heat transfer, and the convection is the dominant factor in the middle and later stages. There were significant heat transfer differences among the upper, middle and lower parts in each PCM, with the faster melting speed at monitoring point PCM3 than that at PCM2 and PCM1. The convective heat transfer between the bottom and the middle parts in PCM was found to be the key affecting the overall phase change rate of the heat exchanger. The findings indicated that the model here provided design basis for the structure of high-efficiency cascade phase-change heat storage and release device, and that promoted the large-scale application of high-efficiency cascade phase-change heat storage technology in mariculture and other industries.
周昊, 李真一, 蔡青霖, 任效忠, 毕春伟, 仲东, 刘鹰. 用于海水养殖的管壳式梯级相变蓄热装置内部传热特性的数值模拟研究[J]. 大连海洋大学学报, 2020, 35(4): 599-606.
ZHOU Hao, LI Zhenyi, CAI Qinglin, REN Xiaozhong, BI Chunwei, ZHONG Dong, LIU Ying, . Numerical simulation of internal heat transfer characteristics in a shell and tube cascade phase change heat storage device used in mariculture. Journal of Dalian Ocean University, 2020, 35(4): 599-606.
2020, Vol. 35 
