Experimental study on the Influence of Heating Surface Inclination Angle on Heat Transfer and CHF performance for Pool Boiling

Chenglong Wang; Panxiao Li; Dalin Zhang; Wenxi Tian; Suizheng Qiu; G.H. Su; Jian Deng

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자료유형: 학술저널

저자정보: Chenglong Wang (Xi'an Jiaotong University) Panxiao Li (Xi'an Jiaotong University) Dalin Zhang (Xi'an Jiaotong University) Wenxi Tian (Xi'an Jiaotong University) Suizheng Qiu (Xi'an Jiaotong University) G.H. Su (Xi'an Jiaotong University) Jian Deng (Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of C)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제54권 제1호

발행연도: 2022.1

수록면: 61 - 71 (11page)

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Pool boiling heat transfer is widely applied in nuclear engineering fields. The influence of heating surface orientation on the pool boiling heat transfer has received extensive attention. In this study, the heating surface with different roughness was adopted to conduct pool boiling experiments at different inclination angles. Based on the boiling curves and bubble images, the effects of inclination angle on the pool boiling heat transfer and critical heat flux were analyzed. When the inclination angle was bigger than 90°, the bubble size increased with the increase of inclination angle. Both the bubble departure frequency and critical heat flux decreased as the inclination angle increased. The existing theoretical models about pool boiling heat transfer and critical heat flux were compared. From the perspective of bubble agitation model and Hot/Dry spot model, the experimental phenomena could be explained reasonably. The enlargement of bubble not only could enhance the agitation of nearby liquid but also would cause the bubble to stay longer on the heating surface. Consequently, the effect of inclination angle on the pool boiling heat transfer was not conspicuous. With the increase of inclination angle, the rewetting of heating surface became much more difficult. It has negative effect on the critical heat flux. This work provides experimental data basis for heat transfer and CHF performance of pool boiling.

#Pool boiling #Inclination angle #Critical heat flux #Theoretical and experimental analysis

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