期刊
JOURNAL OF ENERGY STORAGE
卷 49, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.est.2022.104070
关键词
Latent heat storage; Direct contact; Jet breakup; Heat transfer performance; Numerical study
资金
- National Natural Science Foundation of China [51966015]
- Ministry of Education of China
This paper conducted a numerical simulation on the discharging process of heat transfer fluid at different temperatures and flow rates. The results showed that the novel unit has superior heat transfer performance compared to the conventional unit, but the counterflow may cause small droplets to overflow.
To enhance the heat transfer performance in discharging process, the jet breakup of molten phase change material was introduced into a real scale heat storage unit by numerical method. In order to fully understand its performance, this paper conducted a numerical simulation on discharging process under different temperatures and flow rates of heat transfer fluid. The results showed that the heat transfer performance of this novel unit is superior to the conventional type due to the counterflow and the large heat transfer surface area. When increasing the mass flow rate of heat transfer fluid from 1.29 kg/s to 2.58 kg/s, the preheating time was shortened by 14.9%. When reducing the heat transfer fluid temperature from 38 degrees C to 18 degrees C, the preheating time was increased by 10.5%. However, the counterflow could also make small size droplets outflow the unit.
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