鼓泡板片蒸发式冷凝器流动及传热特性  

Flow and heat transfer characteristics of bubble plate evaporative condenser

作　　者：陈权 章立新[1] 潘旭光 高明[1] 刘婧楠[1] 沈艳 陈金花 CHEN Quan;ZHANG Li-xin;PAN Xu-guang;GAO Ming;LIU Jing-nan;SHEN Yan;CHEN Jin-hua(Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Zhejiang Sanxin Technology Co.,Ltd.,Shaoxing 312521,Zhejiang Province,China;Shanghai Tongchi Heat Exchanger Technology Co.,Ltd.,Shanghai 200433,China;Yantai Lande Air Conditioning Industry Co.,Ltd.,Yantai 264003,Shandong Province,China)

机构地区：[1]上海理工大学能源与动力工程学院上海市动力工程多相流动与传热重点实验室,上海200093 [2]浙江三新科技有限公司,浙江绍兴312521 [3]上海同驰换热设备科技有限公司,上海200433 [4]烟台蓝德空调工业有限责任公司,山东烟台264003

出　　处：《化学工程》2022年第4期46-51,共6页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(51976127)。

摘　　要：为增强板片蒸发式冷凝器板外侧气液两相流动以提升传热能效,用数值模拟分析了顺流与逆流下水膜流动形态,并通过改变淋水量、风速、板间距等主要影响因素,得出了2种流态下的复合传热系数与板间压损。从控制参数范围内的实验结果结合数值模拟分析可知:当风速一定,顺流与逆流下复合传热系数都随淋水量增加先增后减,最佳淋水量都在0.1111 kg/s,且淋水量对板间压损影响极小;当淋水量一定,顺流复合传热系数随风速的增幅呈小-大-小的非线性状,最佳风速在3 m/s,逆流复合传热系数的增幅呈先正后负,最佳风速在2.5 m/s,且2种流态下的板间压损都随着风速增加而增加;随着板间距增加,复合传热系数及板间压降都随之减小。In order to enhance the flow of gas-liquid two-phase on the outer side of the plate evaporator condenser to improve the energy efficiency of heat transfer,numerical simulations were conducted to analyze the flow patterns of water film under the downstream and counterflow.The composite heat transfer coefficients and inter-plate pressure loss under the two flow regimes were obtained by changing the main influencing factors such as the amount of drench water,wind speed and plate spacing.From the experimental results in the range of control parameters combined with numerical simulation analysis,it can be seen that when the wind speed is certain,the compound heat transfer coefficient under both downstream and counterflow increases first and then decreases with the increase of drench water,and the best drench water is 0.1111 kg/s,and the influence of drench water on the inter-plate pressure loss is very small.When the drench water is certain,the compound heat transfer coefficient under downstream flow increases with the wind speed in a small-large-small non-linear pattern,and the best wind speed is 3 m/s.The increase of counter current composite heat transfer coefficient is positive first and then negative,the best wind speed is 2.5 m/s,and the pressure loss between the plates in both flow states increases with the increase of wind speed.With the increase of plate spacing,the compound heat transfer coefficient and pressure drop between the plates are reduced.

关 键 词：鼓泡板片 水降膜 复合传热系数 压损 

分 类 号：TK172[动力工程及工程热物理—热能工程] TK124