期刊
INNOVATIVE SOLUTIONS FOR ENERGY TRANSITIONS
卷 158, 期 -, 页码 5504-5509出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.egypro.2019.01.595
关键词
Elliptic tube; Granular flow; Discrete element method; Heat transfer
资金
- National Basic Research Program of China [2017YFB0603500]
- National Natural Science Foundation of China [51536007]
Moving bed heat exchangers take important part in terms of extracting heat from granular materials. Circular tube is main part of heat exchanger in most studies and implements. Two heat transfer deterioration zone for circular tubes in granular flow is found and results in a low heat transfer coefficient. Elliptic tubes receive increase attention recent years for their better heat transfer performance for fluid. In this work numerical investigation based on DEM has been produced to obtain heat transfer performance of elliptic tubes in granular flow with different axis ratio. The result shows that elliptic tubes with axis ratio from 1.2 to 2.0 have a narrower area of heat transfer deterioration in granular flow and consequently a higher effective heat transfer coefficient from than circular tube (axis ratio =1.0) with the same long axis. (C) 2019 The Authors. Published by Elsevier Ltd.
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