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Optimal research of annular baffle for heat‐discharging performance of single thermal storage tank with molten salt
Author(s) -
Zhang Cancan,
Lu Yuanwei,
Shi Suli,
Wu Yuting,
Ma Chongfang
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5308
Subject(s) - baffle , heat exchanger , mechanics , materials science , dimensionless quantity , thermal energy storage , inlet , molten salt , thermal , heat transfer , shell and tube heat exchanger , mechanical engineering , nuclear engineering , thermodynamics , engineering , physics , metallurgy
Summary The single thermal energy storage tank (STEST) has been extensively investigated because of the advantage of cost and efficiency. This research presents heat discharging performance of STEST using coil heat exchanger (CHE) with annular baffle at different working conditions. The heat discharging performance, flow field and temperature distribution of different parameters of the annular baffle are presented and discussed. The results show that the heat discharging time decreases with an increase inlet air velocity of the CHE. The heat discharging efficiency is up to 95.7% in this study, and the heat discharging time can reach to 18.7 hours. In addition, optimal dimensionless diameters of annular baffle are D b / D t = 0.6, H s / H t = 0.075 and H x / H t = 0.050 ( H s is the height from the top of baffle to the top of tank. H t is the height of the tank. H x is the height from bottom of the baffle to the bottom of the tank). The efficiency of heat discharging process can be enhanced with optimal dimensions of the annular baffle. This study presents a direct practicable guide to design the STEST.