| 摘要: |
| 本文采用控制变量法对混合流状态下的鼓泡式换热板片喷淋水侧的换热性能进行实验研究，分析不同参数对鼓泡板片喷淋水侧热质传递以及阻力性能的影响。结果表明：适当增加喷淋水量可以改善鼓泡板片表面水膜分布的均匀性，提升鼓泡板片的换热效果，建议不低于0.347 kg/(s?m）；板片间距从20 mm增至30 mm时，板间空气的进出口压损下降较为显著，随着间距的进一步增大，空气的流通截面积并不会对板间空气的进出口压损产生很大影响；综合考虑，喷淋侧板间距为25 mm、平均截面风速为6.66 m/s时兼顾了压损影响和换热性能，为最优方案；相较于正位布置，板片错位布置更合理，换热性能更好，换热效果是正位布置的1.1～1.4倍。 |
| 关键词: 蒸发式冷凝器 鼓泡板片 喷淋测流道 热质传递 |
| DOI： |
| 投稿时间：2021-09-23 修订日期：2021-11-20
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| 基金项目:国家自然科学基金（51976127） |
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| Air-Side Heat and Mass Transfer of Bubble Plate in Mixed Flow Evaporative Condenser |
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Zhou Qingquan1, Zhang Kunlong1, Pan Xuguang2, Liu Jingnan1, Gao Ming1, Chen Yongbao1, Peng Xin1,3, Peng Xin1
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| (1.Shanghai Key Laboratory of Multiphase Flow and Heat Transfer of Power Engineering, School of Energy and Power Engineering, University of Shanghai for Science and Technology;2.Zhejiang Sanxin Technology Co., Ltd.;3.Sinochem Cangzhou Cooling Technology Co., Ltd.) |
| Abstract: |
| In this study, the air-side heat transfer performance of a mixed flow bubble plate heat exchange is investigated. The control variable method is used to determine factors that affect the heat transfer performance and water flow resistance of the bubble plate. The results show that an appropriate increase in the spray water flow rate can improve the uniformity of the water film distribution on the surface of the bubble plate such that the heat transfer can be improved; the recommended value for the spray water mass flux is no less than 0.347 kg/(s?m). When the plate spacing is increased from 20 to 30 mm, the air-side pressure drop decreases significantly. As the plate spacing further increases, it has a trivial effect on the air-side pressure drop. A 25 mm plate spacing and an average cross-sectional wind speed of 6.66 m/s are optimal parameters in terms of the air-side pressure drop and heat transfer performance. Compared with the anterior position arrangement, the plate dislocation arrangement is more reasonable and affords better heat exchange performance. Results show that the heat exchange effect of the dislocation arrangement is 1.1–1.4 times that of the anterior position arrangement. |
| Key words: evaporative condenser bubble plate spray flow channel heat and mass transfer |
