Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7046129 | Applied Thermal Engineering | 2018 | 26 Pages |
Abstract
The purpose of this study is to find a kind of appropriate inert solid particles, which is added into two-phase closed thermosyphon (TPCT) to build a new three-phase closed thermosyphon (THPCT), aiming to improve the thermal performance of TPCT. For this purpose an experimental device is designed and built and SiC solid particles are selected as target particles. A range of experimental investigations are carried out by varying solid holdup (5-20%) and heat flux (4.82-19.28â¯kW·mâ2) at the filling ratio (Ï) of 80%. Three sizes of particles with equivalent diameters (de) of 0.275â¯mm, 0.325â¯mm and 0.460â¯mm are studied, respectively. Experimental results show that adding SiC particles into the TPCT significantly affects the heat transfer performance and the results depend on the particle size. In the domain of the particle sizes considered in the experimental work, the maximum evaporation convective heat transfer coefficient is obtained with deâ¯=â¯0.275â¯mm. Compared with TPCT with pure water, evaporation convective heat transfer coefficient is improved by up to 6.0%, and overall thermal resistance is reduced by 6.1% at solid holdup εsâ¯=â¯15% and heat flux qâ¯=â¯9.64â¯kW·mâ2, which correspond to 28.9â¯W·mâ2·°Câ1 and 0.002â¯Â°C·Wâ1, respectively. In addition, the thermal performance of THPCT is also closely related to solid holdup. There is an corresponding optimal solid holdup under different particle size and heat flux.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Hao-jie Li, Feng Jiang, Guo-peng Qi, Peng-li Zhao, Teng Jiang, Na Li, Xiao-ling Chen, Xiu-lun Li,