Experimental Study on the Influence of Parameter Change of Square Rib on Flow Boiling Heat Transfer
Shi Yitao1, Cao Rui1, Ruan Lin1,2
1. Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China; 2. University of Chinese Academy of Sciences Beijing 100049 China
Abstract To explore the influence of the change of rib structure parameters on the flow boiling heat transfer, a visual experimental study is carried out on the flow boiling heat transfer and two-phase pressure drop characteristics in the surface-mounted rib array liquid box. A liquid box with a cross-sectional area of 180 mm×20mm is used as the research object that was a visualized single-sided heating narrow rectangular structure. Seven kinds of rib array backplates with different rib heights, rib spacing, and rib cross-section were selected to study the flow boiling heat transfer characteristics in the liquid box. Through the visual observation of the boiling flow in the liquid box, it is found that The ribs significantly enhance the flow boiling heat transfer in the liquid box. Moreover, the study of the effect of different rib array parameters on boiling heat transfer found that with the change of rib array height and rib array spacing, the boiling heat transfer effect has an optimal value, and the boiling heat transfer coefficient increases as the cross-sectional area of the single rib increases. The flux-resistance pressure drop circulation characteristics in the liquid box are sensitive to the variation of the rib parameters, and the curves show the phenomenon of drifting to the left or the right in different degrees of drift with the changes of the rib array parameters. The research results provide an important basis for the engineering application of the square rib structure in the surface-mounted evaporative cooling system.
Shi Yitao,Cao Rui,Ruan Lin. Experimental Study on the Influence of Parameter Change of Square Rib on Flow Boiling Heat Transfer[J]. Transactions of China Electrotechnical Society, 2022, 37(5): 1275-1284.
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2022, Vol. 37 
